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pthread_attr_getscope, pthread_attr_setscope - get or set contentionscope attribute

cc -mt [ flag... ] file... -lpthread [ library... ]
#include <pthread.h>

int pthread_attr_getscope(const pthread_attr_t *restrict attr,
 int *restrict contentionscope);

int pthread_attr_setscope(pthread_attr_t *attr, int contentionscope);

The pthread_attr_setscope() and pthread_attr_getscope() functions are used to set and get the contentionscope attribute in the attr object.

The contentionscope attribute can have the value PTHREAD_SCOPE_SYSTEM, signifying system scheduling contention scope, or PTHREAD_SCOPE_PROCESS, signifying process scheduling contention scope.

The symbols PTHREAD_SCOPE_SYSTEM and PTHREAD_SCOPE_PROCESS are defined by the header <pthread.h>.

If successful, the pthread_attr_setscope() and pthread_attr_getscope() functions return 0. Otherwise, an error number is returned to indicate the error.

The pthread_attr_setscope(), or pthread_attr_getscope(), function may fail if: EINVAL

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.

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE ATTRIBUTE VALUE

Interface Stability Standard

MT-Level MT-Safe

pthread_attr_init(3C), pthread_attr_setinheritsched(3C), pthread_attr_setschedpolicy(3C), pthread_attr_setschedparam(3C), pthread_create(3C), pthread_setschedparam(3C), attributes(5), standards(5)