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| Threads Library Functions | pthread_attr_getscope(3THR) |
| | pthread_attr_getscope, pthread_attr_setscope - get or set contentionscope attribute |
SYNOPSIS
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cc -mt [ flag... ] file... -lpthread [ -lrt library... ]
#include <pthread.h> int pthread_attr_setscope(pthread_attr_t *attr, int contentionscope); |
| | int pthread_attr_getscope(const pthread_attr_t *attr, int *contentionscope); |
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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>.
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If successful, the pthread_attr_setscope() and pthread_attr_getscope() functions return 0. Otherwise, an error number is returned to indicate the error.
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The pthread_attr_setscope(), or pthread_attr_getscope(), function may fail if:
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EINVAL
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attr or contentionscope 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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