PTHREAD_SCHEDPARAM(3) Library Functions Manual PTHREAD_SCHEDPARAM(3)
NAME
pthread_setschedparam, pthread_getschedparamthread scheduling parameter manipulation
LIBRARY
POSIX Threads Library (libpthread, -lpthread)
SYNOPSIS
#include <pthread.h>
int
pthread_setschedparam(pthread_t thread, int policy, const struct sched_param *param);
int
pthread_getschedparam(pthread_t thread, int * restrict policy, struct sched_param * restrict param);
DESCRIPTION
The pthread_setschedparam() and pthread_getschedparam() functions set and get the scheduling parameters of individual threads. The scheduling policy for a thread can be:
SCHED_FIFO
First in, first out.
SCHED_RR
Round-robin.
SCHED_OTHER
The system default.
 
The thread priority (accessed via param->sched_priority) must be at least PTHREAD_MIN_PRIORITY and no more than PTHREAD_MAX_PRIORITY.
RETURN VALUES
If successful, these functions return 0. Otherwise, an error number is returned to indicate the error.
ERRORS
pthread_setschedparam() may fail if:
[EINVAL]
The value specified by policy is invalid.
[ENOTSUP]
Invalid value for scheduling parameters.
[ESRCH]
Non-existent thread thread.
 
pthread_getschedparam() may fail if:
[ESRCH]
Non-existent thread thread.
SEE ALSO
STANDARDS
Both functions conform to IEEE Std 1003.1-2001 (“POSIX.1”).