1PTHREAD_ATTR_GETSCOPE(3P) POSIX Programmer's Manual PTHREAD_ATTR_GETSCOPE(3P)
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6 This manual page is part of the POSIX Programmer's Manual. The Linux
7 implementation of this interface may differ (consult the corresponding
8 Linux manual page for details of Linux behavior), or the interface may
9 not be implemented on Linux.
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12 pthread_attr_getscope, pthread_attr_setscope - get and set the con‐
13 tentionscope attribute (REALTIME THREADS)
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16 #include <pthread.h>
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18 int pthread_attr_getscope(const pthread_attr_t *restrict attr,
19 int *restrict contentionscope);
20 int pthread_attr_setscope(pthread_attr_t *attr, int contentionscope);
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24 The pthread_attr_getscope() and pthread_attr_setscope() functions,
25 respectively, shall get and set the contentionscope attribute in the
26 attr object.
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28 The contentionscope attribute may have the values PTHREAD_SCOPE_SYSTEM,
29 signifying system scheduling contention scope, or
30 PTHREAD_SCOPE_PROCESS, signifying process scheduling contention scope.
31 The symbols PTHREAD_SCOPE_SYSTEM and PTHREAD_SCOPE_PROCESS are defined
32 in the <pthread.h> header.
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35 If successful, the pthread_attr_getscope() and pthread_attr_setscope()
36 functions shall return zero; otherwise, an error number shall be
37 returned to indicate the error.
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40 The pthread_attr_setscope() function may fail if:
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42 EINVAL The value of contentionscope is not valid.
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44 ENOTSUP
45 An attempt was made to set the attribute to an unsupported
46 value.
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49 These functions shall not return an error code of [EINTR].
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51 The following sections are informative.
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54 None.
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57 After these attributes have been set, a thread can be created with the
58 specified attributes using pthread_create(). Using these routines does
59 not affect the current running thread.
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62 None.
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65 None.
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68 pthread_attr_destroy(), pthread_attr_getinheritsched(),
69 pthread_attr_getschedpolicy(), pthread_attr_getschedparam(),
70 pthread_create(), the Base Definitions volume of IEEE Std 1003.1-2001,
71 <pthread.h>, <sched.h>
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74 Portions of this text are reprinted and reproduced in electronic form
75 from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
76 -- Portable Operating System Interface (POSIX), The Open Group Base
77 Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
78 Electrical and Electronics Engineers, Inc and The Open Group. In the
79 event of any discrepancy between this version and the original IEEE and
80 The Open Group Standard, the original IEEE and The Open Group Standard
81 is the referee document. The original Standard can be obtained online
82 at http://www.opengroup.org/unix/online.html .
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86IEEE/The Open Group 2003 PTHREAD_ATTR_GETSCOPE(3P)