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• Installing vim7.2 on Solaris Sparc 10 as non-root

  - by Tobbe

  I'm trying to install vim to $HOME/bin by compiling the sources. ./configure --prefix=$home/bin seems to work, but when running make I get: > make Starting make in the src directory. If there are problems, cd to the src directory and run make there cd src && make first gcc -c -I. -Iproto -DHAVE_CONFIG_H -DFEAT_GUI_GTK -I/usr/include/gtk-2.0 -I/usr/lib/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/pango-1.0 -I/usr/openwin/include -I/usr/sfw/include -I/usr/sfw/include/freetype2 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -g -O2 -I/usr/openwin/include -o objects/buffer.o buffer.c In file included from buffer.c:28: vim.h:41: error: syntax error before ':' token In file included from os_unix.h:29, from vim.h:245, from buffer.c:28: /usr/include/sys/stat.h:251: error: syntax error before "blksize_t" /usr/include/sys/stat.h:255: error: syntax error before '}' token /usr/include/sys/stat.h:309: error: syntax error before "blksize_t" /usr/include/sys/stat.h:310: error: conflicting types for 'st_blocks' /usr/include/sys/stat.h:252: error: previous declaration of 'st_blocks' was here /usr/include/sys/stat.h:313: error: syntax error before '}' token In file included from /opt/local/bin/../lib/gcc/sparc-sun-solaris2.6/3.4.6/include/sys/signal.h:132, from /usr/include/signal.h:26, from os_unix.h:163, from vim.h:245, from buffer.c:28: /usr/include/sys/siginfo.h:259: error: syntax error before "ctid_t" /usr/include/sys/siginfo.h:292: error: syntax error before '}' token /usr/include/sys/siginfo.h:294: error: syntax error before '}' token /usr/include/sys/siginfo.h:390: error: syntax error before "ctid_t" /usr/include/sys/siginfo.h:398: error: conflicting types for '__fault' /usr/include/sys/siginfo.h:267: error: previous declaration of '__fault' was here /usr/include/sys/siginfo.h:404: error: conflicting types for '__file' /usr/include/sys/siginfo.h:273: error: previous declaration of '__file' was here /usr/include/sys/siginfo.h:420: error: conflicting types for '__prof' /usr/include/sys/siginfo.h:287: error: previous declaration of '__prof' was here /usr/include/sys/siginfo.h:424: error: conflicting types for '__rctl' /usr/include/sys/siginfo.h:291: error: previous declaration of '__rctl' was here /usr/include/sys/siginfo.h:426: error: syntax error before '}' token /usr/include/sys/siginfo.h:428: error: syntax error before '}' token /usr/include/sys/siginfo.h:432: error: syntax error before "k_siginfo_t" /usr/include/sys/siginfo.h:437: error: syntax error before '}' token In file included from /usr/include/signal.h:26, from os_unix.h:163, from vim.h:245, from buffer.c:28: /opt/local/bin/../lib/gcc/sparc-sun-solaris2.6/3.4.6/include/sys/signal.h:173: error: syntax error before "siginfo_t" In file included from os_unix.h:163, from vim.h:245, from buffer.c:28: /usr/include/signal.h:111: error: syntax error before "siginfo_t" /usr/include/signal.h:113: error: syntax error before "siginfo_t" buffer.c: In function `buflist_new': buffer.c:1502: error: storage size of 'st' isn't known buffer.c: In function `buflist_findname': buffer.c:1989: error: storage size of 'st' isn't known buffer.c: In function `setfname': buffer.c:2578: error: storage size of 'st' isn't known buffer.c: In function `otherfile_buf': buffer.c:2836: error: storage size of 'st' isn't known buffer.c: In function `buf_setino': buffer.c:2874: error: storage size of 'st' isn't known buffer.c: In function `buf_same_ino': buffer.c:2894: error: dereferencing pointer to incomplete type buffer.c:2895: error: dereferencing pointer to incomplete type *** Error code 1 make: Fatal error: Command failed for target `objects/buffer.o' Current working directory /home/xluntor/vim72/src *** Error code 1 make: Fatal error: Command failed for target `first' How do I fix the make errors? Or is there another way to install vim as non-root? Thanks in advance EDIT: I took a look at the google groups link Sarah posted. The "Compiling Vim" page linked from there was for Linux, so the commands doesn't even work on Solars. But it did hint at logging the output of ./configure to a file, so I did that. Here it is: ./configure output removed. New version further down. Does anyone spot anything critical missing? EDIT 2: So I downloaded the vim package from sunfreeware. I couldn't just install it, since I don't have root privileges, but I was able to extract the package file. This was the file structure in it: `-- SMCvim `-- reloc |-- bin |-- doc | `-- vim `-- share |-- man | `-- man1 `-- vim `-- vim72 |-- autoload | `-- xml |-- colors |-- compiler |-- doc |-- ftplugin |-- indent |-- keymap |-- lang |-- macros | |-- hanoi | |-- life | |-- maze | `-- urm |-- plugin |-- print |-- spell |-- syntax |-- tools `-- tutor I moved the three files (vim, vimtutor, xdd) in SMCvim/reloc/bin to $HOME/bin, so now I can finally run $HOME/bin/vim! But where do I put the "share" directory and its content? EDIT 3: It might also be worth noting that there already exists an install of vim on the system, but it is broken. When I try to run it I get: ld.so.1: vim: fatal: libgtk-1.2.so.0: open failed: No such file or directory "which vim" outputs /opt/local/bin/vim EDIT 4: Trying to compile this on Solaris 10. uname -a SunOS ws005-22 5.10 Generic_141414-10 sun4u sparc SUNW,SPARC-Enterprise New ./configure output: ./configure --prefix=$home/bin ac_cv_sizeof_int=8 --enable-rubyinterp configure: loading cache auto/config.cache checking whether make sets $(MAKE)... yes checking for gcc... gcc checking for C compiler default output file name... a.out checking whether the C compiler works... yes checking whether we are cross compiling... no checking for suffix of executables... checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... yes checking for gcc option to accept ISO C89... unsupported checking how to run the C preprocessor... gcc -E checking for grep that handles long lines and -e... /usr/sfw/bin/ggrep checking for egrep... /usr/sfw/bin/ggrep -E checking for library containing strerror... none required checking for gawk... gawk checking for strip... strip checking for ANSI C header files... yes checking for sys/wait.h that is POSIX.1 compatible... no configure: checking for buggy tools... checking for BeOS... no checking for QNX... no checking for Darwin (Mac OS X)... no checking --with-local-dir argument... Defaulting to /usr/local checking --with-vim-name argument... Defaulting to vim checking --with-ex-name argument... Defaulting to ex checking --with-view-name argument... Defaulting to view checking --with-global-runtime argument... no checking --with-modified-by argument... no checking if character set is EBCDIC... no checking --disable-selinux argument... no checking for is_selinux_enabled in -lselinux... no checking --with-features argument... Defaulting to normal checking --with-compiledby argument... no checking --disable-xsmp argument... no checking --disable-xsmp-interact argument... no checking --enable-mzschemeinterp argument... no checking --enable-perlinterp argument... no checking --enable-pythoninterp argument... no checking --enable-tclinterp argument... no checking --enable-rubyinterp argument... yes checking for ruby... /opt/sfw/bin/ruby checking Ruby version... OK checking Ruby header files... /opt/sfw/lib/ruby/1.6/sparc-solaris2.10 checking --enable-cscope argument... no checking --enable-workshop argument... no checking --disable-netbeans argument... no checking for socket in -lsocket... yes checking for gethostbyname in -lnsl... yes checking whether compiling netbeans integration is possible... no checking --enable-sniff argument... no checking --enable-multibyte argument... no checking --enable-hangulinput argument... no checking --enable-xim argument... defaulting to auto checking --enable-fontset argument... no checking for xmkmf... /usr/openwin/bin/xmkmf checking for X... libraries /usr/openwin/lib, headers /usr/openwin/include checking whether -R must be followed by a space... no checking for gethostbyname... yes checking for connect... yes checking for remove... yes checking for shmat... yes checking for IceConnectionNumber in -lICE... yes checking if X11 header files can be found... yes checking for _XdmcpAuthDoIt in -lXdmcp... no checking for IceOpenConnection in -lICE... yes checking for XpmCreatePixmapFromData in -lXpm... yes checking if X11 header files implicitly declare return values... no checking --enable-gui argument... yes/auto - automatic GUI support checking whether or not to look for GTK... yes checking whether or not to look for GTK+ 2... yes checking whether or not to look for GNOME... no checking whether or not to look for Motif... yes checking whether or not to look for Athena... yes checking whether or not to look for neXtaw... yes checking whether or not to look for Carbon... yes checking --with-gtk-prefix argument... no checking --with-gtk-exec-prefix argument... no checking --disable-gtktest argument... gtk test enabled checking for gtk-config... /opt/local/bin/gtk-config checking for pkg-config... /usr/bin/pkg-config checking for GTK - version = 2.2.0... yes; found version 2.4.9 checking X11/SM/SMlib.h usability... yes checking X11/SM/SMlib.h presence... yes checking for X11/SM/SMlib.h... yes checking X11/xpm.h usability... yes checking X11/xpm.h presence... yes checking for X11/xpm.h... yes checking X11/Sunkeysym.h usability... yes checking X11/Sunkeysym.h presence... yes checking for X11/Sunkeysym.h... yes checking for XIMText in X11/Xlib.h... yes X GUI selected; xim has been enabled checking whether toupper is broken... no checking whether __DATE__ and __TIME__ work... yes checking elf.h usability... yes checking elf.h presence... yes checking for elf.h... yes checking for main in -lelf... yes checking for dirent.h that defines DIR... yes checking for library containing opendir... none required checking for sys/wait.h that defines union wait... no checking stdarg.h usability... yes checking stdarg.h presence... yes checking for stdarg.h... yes checking stdlib.h usability... yes checking stdlib.h presence... yes checking for stdlib.h... yes checking string.h usability... yes checking string.h presence... yes checking for string.h... yes checking sys/select.h usability... yes checking sys/select.h presence... yes checking for sys/select.h... yes checking sys/utsname.h usability... yes checking sys/utsname.h presence... yes checking for sys/utsname.h... yes checking termcap.h usability... yes checking termcap.h presence... yes checking for termcap.h... yes checking fcntl.h usability... yes checking fcntl.h presence... yes checking for fcntl.h... yes checking sgtty.h usability... yes checking sgtty.h presence... yes checking for sgtty.h... yes checking sys/ioctl.h usability... yes checking sys/ioctl.h presence... yes checking for sys/ioctl.h... yes checking sys/time.h usability... yes checking sys/time.h presence... yes checking for sys/time.h... yes checking sys/types.h usability... yes checking sys/types.h presence... yes checking for sys/types.h... yes checking termio.h usability... yes checking termio.h presence... yes checking for termio.h... yes checking iconv.h usability... yes checking iconv.h presence... yes checking for iconv.h... yes checking langinfo.h usability... yes checking langinfo.h presence... yes checking for langinfo.h... yes checking math.h usability... yes checking math.h presence... yes checking for math.h... yes checking unistd.h usability... yes checking unistd.h presence... yes checking for unistd.h... yes checking stropts.h usability... no checking stropts.h presence... yes configure: WARNING: stropts.h: present but cannot be compiled configure: WARNING: stropts.h: check for missing prerequisite headers? configure: WARNING: stropts.h: see the Autoconf documentation configure: WARNING: stropts.h: section "Present But Cannot Be Compiled" configure: WARNING: stropts.h: proceeding with the preprocessor's result configure: WARNING: stropts.h: in the future, the compiler will take precedence checking for stropts.h... yes checking errno.h usability... yes checking errno.h presence... yes checking for errno.h... yes checking sys/resource.h usability... yes checking sys/resource.h presence... yes checking for sys/resource.h... yes checking sys/systeminfo.h usability... yes checking sys/systeminfo.h presence... yes checking for sys/systeminfo.h... yes checking locale.h usability... yes checking locale.h presence... yes checking for locale.h... yes checking sys/stream.h usability... no checking sys/stream.h presence... yes configure: WARNING: sys/stream.h: present but cannot be compiled configure: WARNING: sys/stream.h: check for missing prerequisite headers? configure: WARNING: sys/stream.h: see the Autoconf documentation configure: WARNING: sys/stream.h: section "Present But Cannot Be Compiled" configure: WARNING: sys/stream.h: proceeding with the preprocessor's result configure: WARNING: sys/stream.h: in the future, the compiler will take precedence checking for sys/stream.h... yes checking termios.h usability... yes checking termios.h presence... yes checking for termios.h... yes checking libc.h usability... no checking libc.h presence... no checking for libc.h... no checking sys/statfs.h usability... yes checking sys/statfs.h presence... yes checking for sys/statfs.h... yes checking poll.h usability... yes checking poll.h presence... yes checking for poll.h... yes checking sys/poll.h usability... yes checking sys/poll.h presence... yes checking for sys/poll.h... yes checking pwd.h usability... yes checking pwd.h presence... yes checking for pwd.h... yes checking utime.h usability... yes checking utime.h presence... yes checking for utime.h... yes checking sys/param.h usability... yes checking sys/param.h presence... yes checking for sys/param.h... yes checking libintl.h usability... yes checking libintl.h presence... yes checking for libintl.h... yes checking libgen.h usability... yes checking libgen.h presence... yes checking for libgen.h... yes checking util/debug.h usability... no checking util/debug.h presence... no checking for util/debug.h... no checking util/msg18n.h usability... no checking util/msg18n.h presence... no checking for util/msg18n.h... no checking frame.h usability... no checking frame.h presence... no checking for frame.h... no checking sys/acl.h usability... yes checking sys/acl.h presence... yes checking for sys/acl.h... yes checking sys/access.h usability... no checking sys/access.h presence... no checking for sys/access.h... no checking sys/sysctl.h usability... no checking sys/sysctl.h presence... no checking for sys/sysctl.h... no checking sys/sysinfo.h usability... yes checking sys/sysinfo.h presence... yes checking for sys/sysinfo.h... yes checking wchar.h usability... yes checking wchar.h presence... yes checking for wchar.h... yes checking wctype.h usability... yes checking wctype.h presence... yes checking for wctype.h... yes checking for sys/ptem.h... no checking for pthread_np.h... no checking strings.h usability... yes checking strings.h presence... yes checking for strings.h... yes checking if strings.h can be included after string.h... yes checking whether gcc needs -traditional... no checking for an ANSI C-conforming const... yes checking for mode_t... yes checking for off_t... yes checking for pid_t... yes checking for size_t... yes checking for uid_t in sys/types.h... yes checking whether time.h and sys/time.h may both be included... yes checking for ino_t... yes checking for dev_t... yes checking for rlim_t... yes checking for stack_t... yes checking whether stack_t has an ss_base field... no checking --with-tlib argument... empty: automatic terminal library selection checking for tgetent in -lncurses... yes checking whether we talk terminfo... yes checking what tgetent() returns for an unknown terminal... zero checking whether termcap.h contains ospeed... yes checking whether termcap.h contains UP, BC and PC... yes checking whether tputs() uses outfuntype... no checking whether sys/select.h and sys/time.h may both be included... yes checking for /dev/ptc... no checking for SVR4 ptys... yes checking for ptyranges... don't know checking default tty permissions/group... can't determine - assume ptys are world accessable world checking return type of signal handlers... void checking for struct sigcontext... no checking getcwd implementation is broken... no checking for bcmp... yes checking for fchdir... yes checking for fchown... yes checking for fseeko... yes checking for fsync... yes checking for ftello... yes checking for getcwd... yes checking for getpseudotty... no checking for getpwnam... yes checking for getpwuid... yes checking for getrlimit... yes checking for gettimeofday... yes checking for getwd... yes checking for lstat... yes checking for memcmp... yes checking for memset... yes checking for nanosleep... no checking for opendir... yes checking for putenv... yes checking for qsort... yes checking for readlink... yes checking for select... yes checking for setenv... yes checking for setpgid... yes checking for setsid... yes checking for sigaltstack... yes checking for sigstack... yes checking for sigset... yes checking for sigsetjmp... yes checking for sigaction... yes checking for sigvec... no checking for strcasecmp... yes checking for strerror... yes checking for strftime... yes checking for stricmp... no checking for strncasecmp... yes checking for strnicmp... no checking for strpbrk... yes checking for strtol... yes checking for tgetent... yes checking for towlower... yes checking for towupper... yes checking for iswupper... yes checking for usleep... yes checking for utime... yes checking for utimes... yes checking for st_blksize... no checking whether stat() ignores a trailing slash... no checking for iconv_open()... yes; with -liconv checking for nl_langinfo(CODESET)... yes checking for strtod in -lm... yes checking for strtod() and other floating point functions... yes checking --disable-acl argument... no checking for acl_get_file in -lposix1e... no checking for acl_get_file in -lacl... no checking for POSIX ACL support... no checking for Solaris ACL support... yes checking for AIX ACL support... no checking --disable-gpm argument... no checking for gpm... no checking --disable-sysmouse argument... no checking for sysmouse... no checking for rename... yes checking for sysctl... not usable checking for sysinfo... not usable checking for sysinfo.mem_unit... no checking for sysconf... yes checking size of int... (cached) 8 checking whether memmove handles overlaps... yes checking for _xpg4_setrunelocale in -lxpg4... no checking how to create tags... ctags -t checking how to run man with a section nr... man -s checking --disable-nls argument... no checking for msgfmt... msgfmt checking for NLS... no "po/Makefile" - disabled checking dlfcn.h usability... yes checking dlfcn.h presence... yes checking for dlfcn.h... yes checking for dlopen()... yes checking for dlsym()... yes checking setjmp.h usability... yes checking setjmp.h presence... yes checking for setjmp.h... yes checking for GCC 3 or later... yes configure: updating cache auto/config.cache configure: creating auto/config.status config.status: creating auto/config.mk config.status: creating auto/config.h Make: make Starting make in the src directory. If there are problems, cd to the src directory and run make there cd src && make first mkdir objects CC="gcc -Iproto -DHAVE_CONFIG_H -DFEAT_GUI_GTK -I/usr/include/gtk-2.0 -I/usr/lib/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/pango-1.0 -I/usr/openwin/include -I/usr/sfw/include -I/usr/sfw/include/freetype2 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/openwin/include -I/opt/sfw/lib/ruby/1.6/sparc-solaris2.10 " srcdir=. sh ./osdef.sh gcc -c -I. -Iproto -DHAVE_CONFIG_H -DFEAT_GUI_GTK -I/usr/include/gtk-2.0 -I/usr/lib/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/pango-1.0 -I/usr/openwin/include -I/usr/sfw/include -I/usr/sfw/include/freetype2 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -g -O2 -I/usr/openwin/include -I/opt/sfw/lib/ruby/1.6/sparc-solaris2.10 -o objects/buffer.o buffer.c In file included from os_unix.h:29, from vim.h:245, from buffer.c:28: /usr/include/sys/stat.h:251: error: syntax error before "blksize_t" /usr/include/sys/stat.h:255: error: syntax error before '}' token /usr/include/sys/stat.h:309: error: syntax error before "blksize_t" /usr/include/sys/stat.h:310: error: conflicting types for 'st_blocks' /usr/include/sys/stat.h:252: error: previous declaration of 'st_blocks' was here /usr/include/sys/stat.h:313: error: syntax error before '}' token In file included from /opt/local/bin/../lib/gcc/sparc-sun-solaris2.6/3.4.6/include/sys/signal.h:132, from /usr/include/signal.h:26, from os_unix.h:163, from vim.h:245, from buffer.c:28: /usr/include/sys/siginfo.h:259: error: syntax error before "ctid_t" /usr/include/sys/siginfo.h:292: error: syntax error before '}' token /usr/include/sys/siginfo.h:294: error: syntax error before '}' token /usr/include/sys/siginfo.h:390: error: syntax error before "ctid_t" /usr/include/sys/siginfo.h:398: error: conflicting types for '__fault' /usr/include/sys/siginfo.h:267: error: previous declaration of '__fault' was here /usr/include/sys/siginfo.h:404: error: conflicting types for '__file' /usr/include/sys/siginfo.h:273: error: previous declaration of '__file' was here /usr/include/sys/siginfo.h:420: error: conflicting types for '__prof' /usr/include/sys/siginfo.h:287: error: previous declaration of '__prof' was here /usr/include/sys/siginfo.h:424: error: conflicting types for '__rctl' /usr/include/sys/siginfo.h:291: error: previous declaration of '__rctl' was here /usr/include/sys/siginfo.h:426: error: syntax error before '}' token /usr/include/sys/siginfo.h:428: error: syntax error before '}' token /usr/include/sys/siginfo.h:432: error: syntax error before "k_siginfo_t" /usr/include/sys/siginfo.h:437: error: syntax error before '}' token In file included from /usr/include/signal.h:26, from os_unix.h:163, from vim.h:245, from buffer.c:28: /opt/local/bin/../lib/gcc/sparc-sun-solaris2.6/3.4.6/include/sys/signal.h:173: error: syntax error before "siginfo_t" In file included from os_unix.h:163, from vim.h:245, from buffer.c:28: /usr/include/signal.h:111: error: syntax error before "siginfo_t" /usr/include/signal.h:113: error: syntax error before "siginfo_t" buffer.c: In function `buflist_new': buffer.c:1502: error: storage size of 'st' isn't known buffer.c: In function `buflist_findname': buffer.c:1989: error: storage size of 'st' isn't known buffer.c: In function `setfname': buffer.c:2578: error: storage size of 'st' isn't known buffer.c: In function `otherfile_buf': buffer.c:2836: error: storage size of 'st' isn't known buffer.c: In function `buf_setino': buffer.c:2874: error: storage size of 'st' isn't known buffer.c: In function `buf_same_ino': buffer.c:2894: error: dereferencing pointer to incomplete type buffer.c:2895: error: dereferencing pointer to incomplete type *** Error code 1 make: Fatal error: Command failed for target `objects/buffer.o' Current working directory /home/xluntor/vim72/src *** Error code 1 make: Fatal error: Command failed for target `first'

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• GDI+ is giving me errors

  - by user146780

  I want to use GDI + just to load a png. I included the headers and lib file then I do: Bitmap b; b.fromfile(filename); I get this from the compiler though. Error 1 error C2146: syntax error : missing ';' before identifier 'b' c:\users\josh\documents\visual studio 2008\projects\vectorizer project\vectorizer project\vectorizer project.cpp 23 Error 2 error C4430: missing type specifier - int assumed. Note: C++ does not support default-int c:\users\josh\documents\visual studio 2008\projects\vectorizer project\vectorizer project\vectorizer project.cpp 23 Error 3 error C4430: missing type specifier - int assumed. Note: C++ does not support default-int c:\users\josh\documents\visual studio 2008\projects\vectorizer project\vectorizer project\vectorizer project.cpp 23 Error 4 error C2440: '=' : cannot convert from 'const char [3]' to 'WCHAR *' c:\users\josh\documents\visual studio 2008\projects\vectorizer project\vectorizer project\vectorizer project.cpp 172 Error 5 error C2228: left of '.FromFile' must have class/struct/union c:\users\josh\documents\visual studio 2008\projects\vectorizer project\vectorizer project\vectorizer project.cpp 179 What is the correct way to do this? Thanks

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• Can I free memory passed to SysAllocString?

  - by RichAmberale

  When allocating a new BSTR with SysAllocString via a wchar_t* on the heap, should I then free the original wchar_t* on the heap? So is this the right way? wchar_t *hs = new wchar_t[20]; // load some wchar's into hs... BSTR bs = SysAllocString(hs); delete[] hs; Am I supposed to call delete here to free up the memory? Or was that memory just adoped by the BSTR?

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• 2-byte (UCS-2) wide strings under GCC

  - by Seva Alekseyev

  Hi all, when porting my Visual C++ project to GCC, I found out that the wchar_t datatype is 4-byte UTF-32 by default. I could override that with a compiler option, but then the whole wcs* (wcslen, wcscmp, etc.) part of RTL is rendered unusable, since it assumes 4-byte wide strings. For now, I've reimplemented 5-6 of these functions from scratch and #defined my implementations in. But is there a more elegant option - say, a build of GCC RTL with 2-byte wchar-t quietly sitting somewhere, waiting to be linked? The specific flavors of GCC I'm after are Xcode on Mac OS X, Cygwin, and the one that comes with Debian Linux Etch.

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• When do I need to deallocate memory?

  - by extintor

  I am using this code inside a class to make a webbrowser control visit a website: void myClass::visitWeb(const char *url) { WCHAR buffer[MAX_LEN]; ZeroMemory(buffer, sizeof(buffer)); MultiByteToWideChar(CP_ACP, MB_ERR_INVALID_CHARS, url, strlen(url), buffer, sizeof(buffer)-1); VARIANT vURL; vURL.vt = VT_BSTR; vURL.bstrVal = SysAllocString(buffer); // webbrowser navigate code... VariantClear(&vURL); } I call visitWeb from another void function that gets called on the handlemessage() for the app. Do I need to do some memory deallocation here?, I see vURL is being deallocated by VariantClear but should I deallocate memory for buffer? I've been told that in another bool I have in the same app I shouldn't deallocate anything because everything clear out when the bool return true/false, but what happens on this void?

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• encryption problem for wlan profile

  - by Jassi

  i am trying to encrypt keyMaterial element from wireless profile. so I want to convert byte array into OLECHAR but it is giving me wrong output not key sea the below code you may know the solution... DATA_BLOB in; DATA_BLOB out; BYTE pin=(BYTE)"FIPL2"; DWORD din=strlen((char*)pin)+1; in.pbData = pin; in.cbData = din; if(CryptProtectData(&in,L"what is it",NULL,NULL,NULL,0,&out)) { BYTE *b=out.pbData; USES_CONVERSION; bstr=SysAllocString(W2BSTR((const WCHAR *)b)); HRCALL(peSubS222->put_text(bstr), ""); SysFreeString(bstr); bstr=NULL; } else { cout<<"NOOOOOOOOOOOOOOOO :("; } what is missing please help me out

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• When do I need to deallocate memory? C++

  - by extintor

  I am using this code inside a class to make a webbrowser control visit a website: void myClass::visitWeb(const char *url) { WCHAR buffer[MAX_LEN]; ZeroMemory(buffer, sizeof(buffer)); MultiByteToWideChar(CP_ACP, MB_ERR_INVALID_CHARS, url, strlen(url), buffer, sizeof(buffer)-1); VARIANT vURL; vURL.vt = VT_BSTR; vURL.bstrVal = SysAllocString(buffer); // webbrowser navigate code... VariantClear(&vURL); } Do I need to do some memory deallocation here?, I see vURL is being deallocated by VariantClear but should I deallocate memory for buffer? I've been told that in another bool I have in the same app I shouldn't deallocate anything because everything clear out when the bool return true/false, but what happens on this void?

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• GetVolumeNameForVolumeMountPoint returns false

  - by new

  Hi.. To get the volume GUID i tried the code like below int len = wcslen( pDetData-DevicePath); pDetData-DevicePath[len] = '\'; pDetData-DevicePath[len+1] = 0; define BUFFER_SIZE MAX_PATH WCHAR volume[BUFFER_SIZE]; BOOL bFlag; bFlag = GetVolumeNameForVolumeMountPoint( pDetData-DevicePath, volume, BUFFER_SIZE ); int loginErrCode = GetLastError(); printf("loginErrCode: %d\n", loginErrCode); printf("BFLAG: %d\n", bFlag); the GetLastError() also prints it as 1 . it means ERROR_INVALID_FUNCTION the bFlag always returns zero it means false. what is the problem in my code... please help me up to get the above function work right

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• C++: Allocation of variables in a loop

  - by Rosarch

  Let's say I have a loop like this: vector<shared_ptr<someStruct>> vec; int i = 0; while (condition) { i++ shared_ptr<someStruct> sps(new someStruct()); WCHAR wchr[20]; memset(wchr, i, 20); sps->pwsz = wchr; vec.push_back(sps); } At the end of this loop, I see that for each sps element of the vector, sps->pwsz is the same. Is this because I'm passing a pointer to memory allocated in a loop, which is destructed after each iteration, and then refilling that same memory on the next iteration?

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• C++: Delete a struct?

  - by Rosarch

  I have a struct that contains pointers: struct foo { char* f; int* d; wchar* m; } I have a vector of shared pointers to these structs: vector<shared_ptr<foo>> vec; vec is allocated on the stack. When it passes out of scope at the end of the method, its destructor will be called. (Right?) That will in turn call the destructor of each element in the vector. (Right?) Does calling delete foo delete just the pointers such as foo.f, or does it actually free the memory from the heap?

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• Windows C++: LPCTSTR vs const TCHAR

  - by mrl33t

  In my application i'm declaring a string variable near the top of my code to define the name of my window class which I use in my calls to RegisterClassEx, CreateWindowEx etc.. Now, I know that an LPCTSTR is a typedef and will eventually follow down to a TCHAR (well a CHAR or WCHAR depending on whether UNICODE is defined), but I was wondering whether it would be better to use this: static LPCTSTR szWindowClass = TEXT("MyApp"); Or this: static const TCHAR szWindowClass[] = TEXT("MyApp"); I personally prefer the use of the LPCTSTR as coming from a JavaScript, PHP, C# background I never really considered declaring a string as an array of chars. But are there actually any advantages of using one over the other, or does it in fact not even make a difference as to which one I choose? Thank you, in advanced, for your answers.

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• help for hindi programming

  - by yogeshbablu

  #include<wchar.h> #include<iostream> using namespace std; int main(int argc,char* argv[]) { fputws(L"?? ?? ?????? ????",stdout); return 0; } ?? ?? ?????? ??? is displayed when i run it on ubuntu can anybody help me out?

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• Configuring SASL support in libmemcached

  - by John Keyes

  I'm trying to build libmemcached with SASL support on OS X Mountain Lion. I have built memcached (1.4.15) with SASL support: $ memcached -S -vv Initialized SASL. slab class 1: chunk size 96 perslab 10922 ... slab class 42: chunk size 1048576 perslab 1 <17 server listening (binary) <18 server listening (binary) <19 send buffer was 9216, now 3728270 <20 send buffer was 9216, now 3728270 <19 server listening (udp) <20 server listening (udp) ... I am trying to build libmemcached with SASL support too. I have tried the following: $ ./configure --prefix=/usr/local \ --with-memcached-sasl=/usr/local/bin/memcached ... $ ./configure --prefix=/usr/local \ --with-memcached-sasl="/usr/local/bin/memcached -S" ... But the resulting configuration summary is the same for both: Configuration summary for libmemcached version 1.0.11 * Installation prefix: /usr/local * System type: apple-darwin12.2.0 * Host CPU: x86_64 * C Compiler: i686-apple-darwin11-llvm-gcc-4.2 (GCC) 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.11.00) * C Flags: -O2 -Werror -Wall -Wextra -std=c99 -Wbad-function-cast -Wmissing-prototypes -Wnested-externs -Woverride-init * C++ Compiler: i686-apple-darwin11-llvm-g++-4.2 (GCC) 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.11.00) * C++ Flags: -O2 -Werror -Wall -Wextra -Wpragmas -D_FORTIFY_SOURCE=2 -Waddress -Wchar-subscripts -Wcomment -Wctor-dtor-privacy -Wfloat-equal -Wformat=2 -Wmissing-field-initializers -Wmissing-noreturn -Wnon-virtual-dtor -Wnormalized=id -Woverloaded-virtual -Wpointer-arith -Wredundant-decls -Wshadow -Wshorten-64-to-32 -Wsign-compare -Wstrict-overflow=1 -Wswitch-enum -Wundef -Wunused-variable -Wwrite-strings -fwrapv -ggdb * CPP Flags: -I/usr/local/include * Assertions enabled: no * Debug enabled: no * Warnings as failure: no * SASL support: Am I doing something incorrectly? Thanks.

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• Using ScriptGetProperties with Delphi

  - by Mohammed Nasman

  How can I use ScriptGetProperties API from Uniscribe Dll (usp10.dll) in Delphi I found an example in C++, but I don't know how to translate it, because I'm not good on C. const SCRIPT_PROPERTIES **g_ppScriptProperties; int g_iMaxScript; WCHAR *pwcInChars = L"Unicode string to itemize"; int cInChars = wcslen(pwcInChars); const int cMaxItems = 20; SCRIPT_ITEM si[cMaxItems + 1]; SCRIPT_ITEM *pItems = si; int cItems; ScriptGetProperties(&g_ppScriptProperties, &g_iMaxScript); HRESULT hResult = ScriptItemize(pwcInChars, cInChars, cMaxItems, NULL, NULL, pItems, &cItems); if (hResult == 0) { for (int i=0; i<cItems; i++) { if (g_ppScriptProperties[pItems[i].a.eScript]->fComplex) { // Item [i] is complex script text // requiring glyph shaping. } else { // The text may be rendered legibly without using Uniscribe. // However, Uniscribe may still be used as a means of accessing // font typographic features. } } } else { // Handle the error. } The Delphi code should be complied with Turbo Delphi 2006 or above.

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• Making two Windows using CreateWindowsEx() - C

  - by Jamie Keeling

  Hello, I have a windows form that has a simple menu and performs a simple operation, I want to be able to create another windows form with all the functionality of a menu bar, message pump etc.. as a separate thread so I can then share the results of the operation to the second window. I.E. 1) Form A opens Form B opens as a separate thread 2)Form A performs operation 3)Form A passes results via memory to Form B 4)Form B display results I'm confused as to how to go about it, the main app runs fine but i'm not sure how to add a second window if the first one already exists. I think that using CreateWindow will allow me to make another window but again i'm not sure how to access the message pump so I can respond to certain events like WM_CREATE on the second window. I hope it makes sense. Thanks! Edit: I've attempted to make a second window and although this does compile, no windows show atall on build. ////////////////////// // WINDOWS FUNCTION // ////////////////////// LRESULT CALLBACK WindowFunc(HWND hMainWindow, UINT message, WPARAM wParam, LPARAM lParam) { //Fields WCHAR buffer[256]; struct DiceData storage; HWND hwnd; // Act on current message switch(message) { case WM_CREATE: AddMenus(hMainWindow); hwnd = CreateWindowEx( 0, "ChildWClass", (LPCTSTR) NULL, WS_CHILD | WS_BORDER | WS_VISIBLE, 0, 0, 0, 0, hMainWindow, NULL, NULL, NULL); ShowWindow(hwnd, SW_SHOW); break; Any suggestions as to why this happens?

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• How to deal with Unicode strings in C/C++ in a cross-platform friendly way?

  - by Sorin Sbarnea

  On platforms different than Windows you could easily use char * strings and treat them as UTF-8. The problem is that on Windows you are required to accept and send messages using wchar* strings (W). If you'll use the ANSI functions (A) you will not support Unicode. So if you want to write truly portable application you need to compile it as Unicode on Windows. Now, In order to keep the code clean I would like to see what is the recommended way of dealing with strings, a way that minimize ugliness in the code. Type of strings you may need: std::string, std::wstring, std::tstring,char *,wchat_t *, TCHAR*, CString (ATL one). Issues you may encounter: cout/cerr/cin and their Unicode variants wcout,wcerr,wcin all renamed wide string functions and their TCHAR macros - like strcmp, wcscmp and _tcscmp. constant strings inside code, with TCHAR you will have to fill your code with _T() macros. What approach do you see as being best? (examples are welcome) Personally I would go for a std::tstring approach but I would like to see how would do to the conversions where they are necessary.

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• Making two Windows using CreateWindowsEx()

  - by Jamie Keeling

  Hello, I have a windows form that has a simple menu and performs a simple operation, I want to be able to create another windows form with all the functionality of a menu bar, message pump etc.. as a separate thread so I can then share the results of the operation to the second window. I.E. 1) Form A opens Form B opens as a separate thread 2)Form A performs operation 3)Form A passes results via memory to Form B 4)Form B display results I'm confused as to how to go about it, the main app runs fine but i'm not sure how to add a second window if the first one already exists. I think that using CreateWindow will allow me to make another window but again i'm not sure how to access the message pump so I can respond to certain events like WM_CREATE on the second window. I hope it makes sense. Thanks! Edit: I've attempted to make a second window and although this does compile, no windows show atall on build. ////////////////////// // WINDOWS FUNCTION // ////////////////////// LRESULT CALLBACK WindowFunc(HWND hMainWindow, UINT message, WPARAM wParam, LPARAM lParam) { //Fields WCHAR buffer[256]; struct DiceData storage; HWND hwnd; // Act on current message switch(message) { case WM_CREATE: AddMenus(hMainWindow); hwnd = CreateWindowEx( 0, "ChildWClass", (LPCTSTR) NULL, WS_CHILD | WS_BORDER | WS_VISIBLE, 0, 0, 0, 0, hMainWindow, NULL, NULL, NULL); ShowWindow(hwnd, SW_SHOW); break; Any suggestions as to why this happens?

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• Is there any time estimation about sqlite3's open speed?

  - by sxingfeng

  I am using SQLite3 in C++, I found the opening time of sqlite seems unstable at the first time( I mean ,open windows and open the db at the first time) It takes a long tiom on 50M db, about 10s in windows? and vary on different times. Has any one met the same problem? I am writting an desktop application in windows, so the openning speed is really important for me. Thanks in advance! int nRet; #if defined(_UNICODE) || defined(UNICODE) nRet = sqlite3_open16(szFile, &mpDB); // not tested under window 98 #else // For Ansi Version //*************- Added by Begemot szFile must be in unicode- 23/03/06 11:04 - **** OSVERSIONINFOEX osvi; ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX)); osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX); GetVersionEx ((OSVERSIONINFO *) &osvi); if ( osvi.dwMajorVersion == 5) { WCHAR pMultiByteStr[MAX_PATH+1]; MultiByteToWideChar( CP_ACP, 0, szFile, _tcslen(szFile)+1, pMultiByteStr, sizeof(pMultiByteStr)/sizeof(pMultiByteStr[0]) ); nRet = sqlite3_open16(pMultiByteStr, &mpDB); } else nRet = sqlite3_open(szFile,&mpDB); #endif //************************* if (nRet != SQLITE_OK) { LPCTSTR szError = (LPCTSTR) _sqlite3_errmsg(mpDB); throw CppSQLite3Exception(nRet, (LPTSTR)szError, DONT_DELETE_MSG); } setBusyTimeout(mnBusyTimeoutMs);

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• GDI+ not clearing my window on repaint for vista

  - by Michael

  on WM_PAINT i do the following: //RectF mNameRect; //WCHAR* mName; //HWND mWin; // this is the window handle { PAINTSTRUCT ps; HDC hdc = BeginPaint(mWin, &ps); Graphics g(hdc); g.Clear(Color::White); StringFormat stringForm; stringForm.SetLineAlignment(StringAlignmentCenter); stringForm.SetAlignment(StringAlignmentCenter); // set the rectangle to the size of the whole window mNameRect.Width = static_cast<float>(size.cx); mNameRect.Height = static_cast<float>(size.cy); g.DrawString(mName, -1, &mNameFont, mNameRect, &stringForm, &mNameBrush); EndPaint(mWin, &ps); } In XP this works fine, the mName is displayed in the middle of the window. However on Vista the text doesn't move, it stays in its location no matter how I resize the window. the g.Clear(Color::White) doesn't seem to do any difference. The text doesn't even change position when the window is hidden behind another window and on focus needs to be repainted again. How do I make mName change position in Vista?

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• iotop for Linux kernel 2.6.18

  - by Lightsauce

  So it has to come to my attention that iotop isn't availalbe for 2.6.18 since it's less than 2.6.20 and requires Python 2.6+. I've done some research and came across this article: http://lserinol.blogspot.com/2009/09/io-usage-per-process-on-linux.html According to this, if these process have io stats in /proc/pid#/io (where pid# is the process #) it's doable regardless of the kernel version. So, in reality, I could upgrade Python to 2.6 and test out iotop. However, my flavor of Linux, CentOS release 5.5 (Final), only supports Python 2.4.3-44.el5 currently. If I were to do uninstall from yum, it doesn't look so pretty. It ends up wanting to uninstall 235 packages, most of which are very important! I read in one place, online (I forget the URL from yesterday), that you can install Python 2.6+ parallel to this one, and have the rpm install for iotop use that. Well, I didn't choose that route. I figured, what the heck, lets write iotop (not copying it, but reverse engineering it without actually looking at it's code/it in use) in bash. I thought it would just grab the /proc/pid#/io file and parse stats. So I wrote a script to grab the top 10 rchar, wchar, read_bytes, and write_bytes by collecting all these stats from all the /proc/pid#/io files, sorting them by each metric, then grabbing the top 10 highest values. The conclusion, the data seems completely useless. Does anybody know any resources for advanced Linux where I can figure out how to take these /proc/pid#/ directories and figure out what the heck they are doing with io on the disk? My main goal is to figure out what exactly is causing high load on my disk. I just know it's on the / partition (/dev/sda2 in this case), and I'm not really sure how to narrow it down without the help of iotop. If I run iostat to grab metrics for 1 minute, every second, the first result it gives me shows a high 'kB_read/s', so that makes me think, it's reading mostly. However, if I watch the update it gives me every second, it's actually just showing values for kB_wrtn/s. This makes me think the initial value iostat gives me is misleading.

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• How to use c++0x thread in Android NDK?

  - by m-ric

  I am trying to compile this simple program with android-ndk-r8b: jni/hello_jni.cpp #include <iostream> #include <thread> void hello() { std::cout << "Hi i'm a thread!!!" << std::endl; } int main() { std::thread th(hello); th.join(); return 0; } jni/Application.mk APP_OPTIM := release APP_MODULES := hello_thread APP_STL := gnustl_static jni/Android.mk LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_CPPFLAGS += -std=c++0x -frtti LOCAL_MODULE := hello_thread LOCAL_LDLIBS := -L$(SYSROOT)/usr/lib -pthread LOCAL_SRC_FILES := hello_thread.cpp include $(BUILD_EXECUTABLE) ndk-build returns me an error arguin that 'thread' is not a member of 'std'. I issued ndk-build -n to get the compilation command and issued it alone in my shell: /home/evigier/android-ndk-r8b/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/bin/arm-linux-androideabi-g++ -MMD -MP -MF /home/evigier/eclipse_workspace/hello_thread/obj/local/armeabi/objs/hello_thread/hello_thread.o.d -fpic -ffunction-sections -funwind-tables -fstack-protector -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ -march=armv5te -mtune=xscale -msoft-float -fno-exceptions -fno-rtti -mthumb -Os -fomit-frame-pointer -fno-strict-aliasing -finline-limit=64 -I/home/evigier/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include -I/home/evigier/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/libs/armeabi/include -I/home/evigier/eclipse_workspace/hello_thread/jni -DANDROID -Wa,--noexecstack -std=c++0x -frtti -O2 -DNDEBUG -g -I/home/evigier/android-ndk-r8b/platforms/android-14/arch-arm/usr/include -c /home/evigier/eclipse_workspace/hello_thread/jni/hello_thread.cpp -o /home/evigier/eclipse_workspace/hello_thread/obj/local/armeabi/objs/hello_thread/hello_thread.o Compile++ thumb : hello_thread <= hello_thread.cpp In file included from /home/evigier/android-ndk-r8b/platforms/android-14/arch-arm/usr/include/stdio.h:55:0, from /home/evigier/android-ndk-r8b/platforms/android-14/arch-arm/usr/include/wchar.h:33, from /home/evigier/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include/cwchar:46, from /home/evigier/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include/bits/postypes.h:42, from /home/evigier/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include/iosfwd:42, from /home/evigier/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include/ios:39, from /home/evigier/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include/ostream:40, from /home/evigier/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include/iostream:40, from jni/hello_thread.cpp:4: /home/evigier/android-ndk-r8b/platforms/android-14/arch-arm/usr/include/sys/types.h:124:9: error: 'uint64_t' does not name a type /home/evigier/eclipse_workspace/hello_thread/jni/hello_thread.cpp: In function 'int main()': /home/evigier/eclipse_workspace/hello_thread/jni/hello_thread.cpp:14:5: error: 'thread' is not a member of 'std' /home/evigier/eclipse_workspace/hello_thread/jni/hello_thread.cpp:14:17: error: expected ';' before 'th' /home/evigier/eclipse_workspace/hello_thread/jni/hello_thread.cpp:15:5: error: 'th' was not declared in this scope I read a lot of threads/questions about POSIX threads and C++ threads, but still cannot find my answer. My arm-linux-androideabi/include/c++/4.6/thread file defines class thread in std only: #if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1) They don't seem to be defined in my sdk (c++config.h). But how can I possibly turn them on safely? Do i need to compile my own toolchain to use (non-p)threads? My host computer is : Linux evigier-ThinkPad-X220 3.0.0-17-generic #30-Ubuntu SMP Thu Mar 8 20:45:39 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

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• Implementing events to communicate between two processes - C

  - by Jamie Keeling

  Hello all! I have an application consisting of two windows, one communicates to the other and sends it a struct constaining two integers (In this case two rolls of a dice). I will be using events for the following circumstances: Process a sends data to process b, process b displays data Process a closes, in turn closing process b Process b closes a, in turn closing process a I have noticed that if the second process is constantly waiting for the first process to send data then the program will be just sat waiting, which is where the idea of implementing threads on each process occurred and I have started to implement this already. The problem i'm having is that I don't exactly have a lot of experience with threads and events so I'm not sure of the best way to actually implement what I want to do. Following is a small snippet of what I have so far in the producer application; Create thread: case IDM_FILE_ROLLDICE: { hDiceRoll = CreateThread( NULL, // lpThreadAttributes (default) 0, // dwStackSize (default) ThreadFunc(hMainWindow), // lpStartAddress NULL, // lpParameter 0, // dwCreationFlags &hDiceID // lpThreadId (returned by function) ); } break; The data being sent to the other process: DWORD WINAPI ThreadFunc(LPVOID passedHandle) { HANDLE hMainHandle = *((HANDLE*)passedHandle); WCHAR buffer[256]; LPCTSTR pBuf; LPVOID lpMsgBuf; LPVOID lpDisplayBuf; struct diceData storage; HANDLE hMapFile; DWORD dw; //Roll dice and store results in variable storage = RollDice(); hMapFile = CreateFileMapping( (HANDLE)0xFFFFFFFF, // use paging file NULL, // default security PAGE_READWRITE, // read/write access 0, // maximum object size (high-order DWORD) BUF_SIZE, // maximum object size (low-order DWORD) szName); // name of mapping object if (hMapFile == NULL) { dw = GetLastError(); MessageBox(hMainHandle,L"Could not create file mapping object",L"Error",MB_OK); return 1; } pBuf = (LPTSTR) MapViewOfFile(hMapFile, // handle to map object FILE_MAP_ALL_ACCESS, // read/write permission 0, 0, BUF_SIZE); if (pBuf == NULL) { MessageBox(hMainHandle,L"Could not map view of file",L"Error",MB_OK); CloseHandle(hMapFile); return 1; } CopyMemory((PVOID)pBuf, &storage, (_tcslen(szMsg) * sizeof(TCHAR))); //_getch(); MessageBox(hMainHandle,L"Completed!",L"Success",MB_OK); UnmapViewOfFile(pBuf); return 0; } I'm trying to find out how I would integrate an event with the threaded code to signify to the other process that something has happened, I've seen an MSDN article on using events but it's just confused me if anything, I'm coming up on empty whilst searching on the internet too. Thanks for any help Edit: I can only use the Create/Set/Open methods for events, sorry for not mentioning it earlier.

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• Using events in threads between processes - C

  - by Jamie Keeling

  Hello all! I have an application consisting of two windows, one communicates to the other and sends it a struct constaining two integers (In this case two rolls of a dice). I will be using events for the following circumstances: Process a sends data to process b, process b displays data Process a closes, in turn closing process b Process b closes a, in turn closing process a I have noticed that if the second process is constantly waiting for the first process to send data then the program will be just sat waiting, which is where the idea of implementing threads on each process occurred and I have started to implement this already. The problem i'm having is that I don't exactly have a lot of experience with threads and events so I'm not sure of the best way to actually implement what I want to do. Following is a small snippet of what I have so far in the producer application; Create thread: case IDM_FILE_ROLLDICE: { hDiceRoll = CreateThread( NULL, // lpThreadAttributes (default) 0, // dwStackSize (default) ThreadFunc(hMainWindow), // lpStartAddress NULL, // lpParameter 0, // dwCreationFlags &hDiceID // lpThreadId (returned by function) ); } break; The data being sent to the other process: DWORD WINAPI ThreadFunc(LPVOID passedHandle) { HANDLE hMainHandle = *((HANDLE*)passedHandle); WCHAR buffer[256]; LPCTSTR pBuf; LPVOID lpMsgBuf; LPVOID lpDisplayBuf; struct diceData storage; HANDLE hMapFile; DWORD dw; //Roll dice and store results in variable storage = RollDice(); hMapFile = CreateFileMapping( (HANDLE)0xFFFFFFFF, // use paging file NULL, // default security PAGE_READWRITE, // read/write access 0, // maximum object size (high-order DWORD) BUF_SIZE, // maximum object size (low-order DWORD) szName); // name of mapping object if (hMapFile == NULL) { dw = GetLastError(); MessageBox(hMainHandle,L"Could not create file mapping object",L"Error",MB_OK); return 1; } pBuf = (LPTSTR) MapViewOfFile(hMapFile, // handle to map object FILE_MAP_ALL_ACCESS, // read/write permission 0, 0, BUF_SIZE); if (pBuf == NULL) { MessageBox(hMainHandle,L"Could not map view of file",L"Error",MB_OK); CloseHandle(hMapFile); return 1; } CopyMemory((PVOID)pBuf, &storage, (_tcslen(szMsg) * sizeof(TCHAR))); //_getch(); MessageBox(hMainHandle,L"Completed!",L"Success",MB_OK); UnmapViewOfFile(pBuf); return 0; } I'm trying to find out how I would integrate an event with the threaded code to signify to the other process that something has happened, I've seen an MSDN article on using events but it's just confused me if anything, I'm coming up on empty whilst searching on the internet too. Thanks for any help Edit: I can only use the Create/Set/Open methods for events, sorry for not mentioning it earlier.

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• Ideas on implementing threads and cross process communication. - C

  - by Jamie Keeling

  Hello all! I have an application consisting of two windows, one communicates to the other and sends it a struct constaining two integers (In this case two rolls of a dice). I will be using events for the following circumstances: Process a sends data to process b, process b displays data Process a closes, in turn closing process b Process b closes a, in turn closing process a I have noticed that if the second process is constantly waiting for the first process to send data then the program will be just sat waiting, which is where the idea of implementing threads on each process occured. I have already implemented a thread on the first process which currently creates the data to send to the second process and makes it available to the second process. The problem i'm having is that I don't exactly have a lot of experience with threads and events so I'm not sure of the best way to actually implement what I want to do. Following is a small snippet of what I have so far in the producer application; Rolling the dice and sending the data: case IDM_FILE_ROLLDICE: { hDiceRoll = CreateThread( NULL, // lpThreadAttributes (default) 0, // dwStackSize (default) ThreadFunc(hMainWindow), // lpStartAddress NULL, // lpParameter 0, // dwCreationFlags &hDiceID // lpThreadId (returned by function) ); } break; The data being sent to the other process: DWORD WINAPI ThreadFunc(LPVOID passedHandle) { HANDLE hMainHandle = *((HANDLE*)passedHandle); WCHAR buffer[256]; LPCTSTR pBuf; LPVOID lpMsgBuf; LPVOID lpDisplayBuf; struct diceData storage; HANDLE hMapFile; DWORD dw; //Roll dice and store results in variable storage = RollDice(); hMapFile = CreateFileMapping( (HANDLE)0xFFFFFFFF, // use paging file NULL, // default security PAGE_READWRITE, // read/write access 0, // maximum object size (high-order DWORD) BUF_SIZE, // maximum object size (low-order DWORD) szName); // name of mapping object if (hMapFile == NULL) { dw = GetLastError(); MessageBox(hMainHandle,L"Could not create file mapping object",L"Error",MB_OK); return 1; } pBuf = (LPTSTR) MapViewOfFile(hMapFile, // handle to map object FILE_MAP_ALL_ACCESS, // read/write permission 0, 0, BUF_SIZE); if (pBuf == NULL) { MessageBox(hMainHandle,L"Could not map view of file",L"Error",MB_OK); CloseHandle(hMapFile); return 1; } CopyMemory((PVOID)pBuf, &storage, (_tcslen(szMsg) * sizeof(TCHAR))); //_getch(); MessageBox(hMainHandle,L"Completed!",L"Success",MB_OK); UnmapViewOfFile(pBuf); return 0; } I'd like to think I am at least on the right lines, although for some reason when the application finishes creating the thread it hits the return DefWindowProc(hMainWindow, message, wParam, lParam); it crashes saying there's no more source code for the current location. I know there are certain ways to implement things but as I've mentioned I'm not sure if i'm doing this the right way, has anybody else tried to do the same thing? Thanks!

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• C++: Trouble with Pointers, loop variables, and structs

  - by Rosarch

  Consider the following example: #include <iostream> #include <sstream> #include <vector> #include <wchar.h> #include <stdlib.h> using namespace std; struct odp { int f; wchar_t* pstr; }; int main() { vector<odp> vec; ostringstream ss; wchar_t base[5]; wcscpy_s(base, L"1234"); for (int i = 0; i < 4; i++) { odp foo; foo.f = i; wchar_t loopStr[1]; foo.pstr = loopStr; // wchar_t* = wchar_t ? Why does this work? foo.pstr[0] = base[i]; vec.push_back(foo); } for (vector<odp>::iterator iter = vec.begin(); iter != vec.end(); iter++) { cout << "Vec contains: " << iter->f << ", " << *(iter->pstr) << endl; } } This produces: Vec contains: 0, 52 Vec contains: 1, 52 Vec contains: 2, 52 Vec contains: 3, 52 I would hope that each time, iter->f and iter->pstr would yield a different result. Unfortunately, iter->pstr is always the same. My suspicion is that each time through the loop, a new loopStr is created. Instead of copying it into the struct, I'm only copying a pointer. The location that the pointer writes to is getting overwritten. How can I avoid this? Is it possible to solve this problem without allocating memory on the heap?

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