GTK bug? xcb_io.c: 140

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03-21-2014

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You should always use a mutex for global variables when dealing with multiple threads. This is particularly important on multicore systems -- the mutex doesn't just prevent race conditions, it forces two cores to sync their memory (one core could change the memory, and the other core might not know, old memory in cache, until the mutex forces it to sync).

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tis_lock_global

tis_lock_global(3)					     Library Functions Manual						tis_lock_global(3)

NAME

       tis_lock_global - Locks the DECthreads global mutex.

LIBRARY

       Standard C Library (libc.so, libc.a)

SYNOPSIS

       #include <tis.h>

       int   tis_lock_global(void);

STANDARDS

       None

PARAMETERS

       None

DESCRIPTION

       This routine locks the DECthreads global mutex.	The global mutex is recursive.	For example, if you called tis_lock_global(3) three times,
       tis_unlock_global(3) unlocks the global mutex when you call it the third time.

       For more information about actions taken when threads are present, refer to the pthread_lock_global_np(3) description.

RETURN VALUES

       If an error condition occurs, this routine returns an integer value indicating the type of error.  Possible return values are  as  follows:
       Successful completion.

ERRORS

       None

RELATED INFORMATION

       Functions: tis_unlock_global(3)

       Manuals: Guide to DECthreads and Programmer's Guide

       delim off

																tis_lock_global(3)

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