Access static constant variable from multiple threads in C

Posted by user325519 on Stack Overflow See other posts from Stack Overflow or by user325519
Published on 2010-05-17T09:33:49Z Indexed on 2010/05/17 9:40 UTC
Read the original article Hit count: 171

Filed under:

c++

I have some experience with multithread programming under Linux (C/C++ & POSIX threads), however most obvious cases are sometimes very complicated.

I have several static constant variables (global and function local) in my code, can I access them simultaneously from multiple threads without using mutexes? Because I don't modify them it should be ok, but it's always better to ask.

I have to do heavy speed optimization, so even as fast operations as mutex lock/unlock are quite expensive for me, especially because my application is going to access these variables form long loops.

Related posts about pthread

How this pthread actually works?

as seen on Stack Overflow - Search for 'Stack Overflow'
I am actually on my project on compiler with SMP, and want to code with pthreads and heard about many parallel things open mpi and so on, So to start with how this thread is allocated to core while calling pthread,Is there any way to give threads to different cores by pthreads? >>> More
pthread windows event equivalent question

as seen on Stack Overflow - Search for 'Stack Overflow'
I have the following code which replicates the windows manual and auto reset events. class event { public: event( bool signalled = false, bool ar = true ) : _auto( ar ), _signalled( signalled ) { pthread_mutex_init( &_mutex, NULL ); pthread_cond_init( &_cond… >>> More
Using pthread to perform matrix multiplication

as seen on Stack Overflow - Search for 'Stack Overflow'
I have both matrices containing only ones and each array has 500 rows and columns. So, the resulting matrix should be a matrix of all elements having value 500. But, I am getting res_mat[0][0]=5000. Even other elements are also 5000. Why? #include<stdio.h> #include<pthread.h> #include<unistd… >>> More
Attaching Memeber function of a class in pthread

as seen on Stack Overflow - Search for 'Stack Overflow'
pthread_t thread1; pthread_create(&thread1,NULL,.......,NULL);// Here I want to attach a thread to a member funtion of class How can i pass the Member function of a class in the above code. >>> More
Attaching Member function of a class in pthread

as seen on Stack Overflow - Search for 'Stack Overflow'
pthread_t thread1; pthread_create(&thread1,NULL,.......,NULL); // Here I want to attach a thread to a member function of class How can I pass the member function of a class in the above code. >>> More

Developer IT

Access static constant variable from multiple threads in C - Developer IT

Access static constant variable from multiple threads in C

pthread

c

c++

Related posts about pthread

How this pthread actually works?

pthread windows event equivalent question

Using pthread to perform matrix multiplication

Attaching Memeber function of a class in pthread

Attaching Member function of a class in pthread

Related posts about c

Categories cloud