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Diffstat (limited to 'linuxthreads/man/pthread_once.man')
| -rw-r--r-- | linuxthreads/man/pthread_once.man | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/linuxthreads/man/pthread_once.man b/linuxthreads/man/pthread_once.man new file mode 100644 index 0000000..e9d117b --- /dev/null +++ b/linuxthreads/man/pthread_once.man @@ -0,0 +1,34 @@ +.TH PTHREAD_ONCE 3 LinuxThreads + +.SH NAME +pthread_once \- once-only initialization + +.SH SYNOPSIS +#include <pthread.h> + +pthread_once_t once_control = PTHREAD_ONCE_INIT; + +int pthread_once(pthread_once_t *once_control, void (*init_routine) (void)); + +.SH DESCRIPTION + +The purpose of !pthread_once! is to ensure that a piece of +initialization code is executed at most once. The |once_control| +argument points to a static or extern variable statically initialized +to !PTHREAD_ONCE_INIT!. + +The first time !pthread_once! is called with a given |once_control| +argument, it calls |init_routine| with no argument and changes the +value of the |once_control| variable to record that initialization has +been performed. Subsequent calls to !pthread_once! with the same +!once_control! argument do nothing. + +.SH "RETURN VALUE" +!pthread_once! always returns 0. + +.SH ERRORS +None. + +.SH AUTHOR +Xavier Leroy <Xavier.Leroy@inria.fr> + |