NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | USAGE | ATTRIBUTES | SEE ALSO
cc -mt [ flag... ] file...- lpthread [ library... ] #include <pthread.h>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 pthread_attr_setscope() and pthread_attr_getscope() functions set and get the contentionscope thread attribute in the attr object. The contentionscope value may be set to the following:
Indicates system scheduling contention scope. This thread is permanently "bound" to an LWP, and is also called a bound thread.
Indicates process scheduling contention scope. This thread is not "bound" to an LWP, and is also called an unbound thread. PTHREAD_SCOPE_PROCESS , or unbound, is the default.
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:
attr or contentionscope is invalid.
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 |
---|---|
MT-Level | MT-Safe |
pthread_attr_init(3THR) , pthread_attr_setinheritsched(3THR) , pthread_attr_setschedpolicy(3THR) , pthread_attr_setschedparam(3THR) , pthread_create(3THR) , pthread_setschedparam(3THR) , attributes(5) , standards(5)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | USAGE | ATTRIBUTES | SEE ALSO