|PTHREAD_GETCONCURRENCY(3)||Library Functions Manual||PTHREAD_GETCONCURRENCY(3)|
pthread_setconcurrency() function allows an application to inform the threads implementation of its desired concurrency level, new_level. The actual level of concurrency provided by the implementation as a result of this function call is unspecified. If new_level is zero, it causes the implementation to maintain the concurrency level at its discretion as if
pthread_setconcurrency() was never called. The
pthread_getconcurrency() function returns the value set by a previous call to the
pthread_setconcurrency() function. If the
pthread_setconcurrency() function was not previously called, this function returns zero to indicate that the implementation is maintaining the concurrency level. When an application calls
pthread_setconcurrency(), it is informing the implementation of its desired concurrency level. The implementation uses this as a hint, not a requirement.
pthread_setconcurrency() function returns zero. Otherwise, an error number is returned to indicate the error. The
pthread_getconcurrency() function always returns the concurrency level set by a previous call to
pthread_setconcurrency(). If the
pthread_setconcurrency() function has never been called,
pthread_getconcurrency() returns zero.
pthread_setconcurrency() will fail if:
pthread_setconcurrency() functions since their use may conflict with an application's use of these functions.
pthread_setconcurrency() functions conform to Version 2 of the Single UNIX Specification (“SUSv2”).
|June 5, 2013||OpenBSD-current|