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sched_yield — yield processor
Standard C Library (libc, -lc)
#include <sched.h> int sched_yield(void);
The sched_yield() system call forces the running process to relinquish the processor until it again becomes the head of its process list. It takes no arguments.
The sched_yield() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indicate the error.
On failure errno will be set to the corresponding value: [ENOSYS] The system is not configured to support this functionality.
The sched_yield() system call conforms to IEEE Std 1003.1b-1993 (“POSIX.1”).