Forces the calling thread to relinquish use of its processor.
Threads Library (libpthreads.a)
#include <pthread.h>void pthread_yield ()The pthread_yield subroutine forces the calling thread to relinquish use of its processor, and to wait in the run queue before it is scheduled again. If the run queue is empty when the pthread_yield subroutine is called, the calling thread is immediately rescheduled.
If the thread has global contention scope (PTHREAD_SCOPE_SYSTEM), calling this subroutine acts like calling the yield subroutine. Otherwise, another local contention scope thread is scheduled.
The pthread.h header file must be the first included file of each source file using the threads library. Otherwise, the -D_THREAD_SAFE compilation flag should be used, or the cc_r compiler used. In this case, the flag is automatically set.