Originální popis anglicky:
pthread_attr_getscope, pthread_attr_setscope - get and set the contentionscope
attribute (
REALTIME THREADS)
Návod, kniha: POSIX Programmer's Manual
#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_getscope() and
pthread_attr_setscope() functions,
respectively, shall get and set the
contentionscope attribute in the
attr object.
The
contentionscope attribute may have the values 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 in the
<pthread.h> header.
If successful, the
pthread_attr_getscope() and
pthread_attr_setscope() functions shall return zero; otherwise, an
error number shall be returned to indicate the error.
The
pthread_attr_setscope() function may fail if:
- EINVAL
- The value of contentionscope is not valid.
- ENOTSUP
- An attempt was made to set the attribute to an unsupported
value.
These functions shall not return an error code of [EINTR].
The following sections are informative.
None.
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.
None.
None.
pthread_attr_destroy() ,
pthread_attr_getinheritsched() ,
pthread_attr_getschedpolicy() ,
pthread_attr_getschedparam() ,
pthread_create() , the Base Definitions volume of
IEEE Std 1003.1-2001,
<pthread.h>,
<sched.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy between
this version and the original IEEE and The Open Group Standard, the original
IEEE and The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.opengroup.org/unix/online.html
.
