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Threads Library Functions | pthread_attr_getschedpolicy(3THR) |
| pthread_attr_getschedpolicy, pthread_attr_setschedpolicy - get or set schedpolicy attribute |
SYNOPSIS
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cc -mt [ flag... ] file... -lpthread [ -lrt library... ]
#include <pthread.h> int pthread_attr_setschedpolicy(pthread_attr_t *attr, int policy); |
| int pthread_attr_getschedpolicy(const pthread_attr_t *attr, int *policy); |
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The functions pthread_attr_setschedpolicy() and pthread_attr_getschedpolicy(), respectively, set and get the schedpolicy attribute
in the attr argument.
The supported values of policy include SCHED_FIFO, SCHED_RR and SCHED_OTHER, which are defined by the header <sched.h>. When threads executing with the scheduling policy SCHED_FIFO or SCHED_RR are waiting on a mutex, they acquire the mutex in priority order when the mutex is unlocked.
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If successful, the pthread_attr_setschedpolicy() and pthread_attr_getschedpolicy() functions return 0. Otherwise, an error number is returned
to indicate the error.
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The pthread_attr_setschedpolicy() or pthread_attr_getschedpolicy() function may fail if:
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EINVAL
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attr or policy is invalid.
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After these attributes have been set, a thread can be created with the specified attributes using pthread_create(). Using these routines does not affect the current running thread.
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See attributes(5) for descriptions of the following
attributes:
ATTRIBUTE TYPE | ATTRIBUTE VALUE |
MT-Level | MT-Safe |
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