PTHREAD_ATTR(3) | Library Functions Manual | PTHREAD_ATTR(3) |
pthread_attr_getscope
,
pthread_attr_setscope
—
thread attribute operations
#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);
Thread attributes are used to specify parameters to
pthread_create
().
One attribute object can be used in multiple calls to
pthread_create
(), with or without modifications
between calls.
The
pthread_attr_setscope
()
and
pthread_attr_getscope
()
functions, respectively, set and get the attribute within
attr argument that controls the contention scope of
the thread. The acceptable values are PTHREAD_SCOPE_SYSTEM, indicating a
scheduling contention scope that is system-wide, and PTHREAD_SCOPE_PROCESS,
which indicates a process scheduling contention scope. Currently on Mac OS X
we only support PTHREAD_SCOPE_SYSTEM.
If successful, these functions return 0. Otherwise, an error number is returned to indicate the error.
pthread_attr_getscope
() will fail if:
EINVAL
]pthread_attr_setscope
() will fail if:
pthread_create(3), pthread_attr_init(3), pthread_attr_setinheritsched(3), pthread_attr_setschedpolicy(3), pthread_attr_setschedparam(3)
pthread_attr_setscope
(),
pthread_attr_getscope
() conform to
Version 2 of the Single UNIX Specification
(“SUSv2”)
December 31, 2007 | macOS 14.6 |