1PTHREAD_ATTR_GETSCHEDPOLICY(PPO)SIX Programmer's ManPuTaHlREAD_ATTR_GETSCHEDPOLICY(P)
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6 pthread_attr_getschedpolicy, pthread_attr_setschedpolicy - get and set
7 the schedpolicy attribute (REALTIME THREADS)
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10 #include <pthread.h>
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12 int pthread_attr_getschedpolicy(const pthread_attr_t *restrict attr,
13 int *restrict policy);
14 int pthread_attr_setschedpolicy(pthread_attr_t *attr, int policy);
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18 The pthread_attr_getschedpolicy() and pthread_attr_setschedpolicy()
19 functions, respectively, shall get and set the schedpolicy attribute in
20 the attr argument.
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22 The supported values of policy shall include SCHED_FIFO, SCHED_RR, and
23 SCHED_OTHER, which are defined in the <sched.h> header. When threads
24 executing with the scheduling policy SCHED_FIFO, SCHED_RR, or
25 SCHED_SPORADIC are waiting on a mutex, they shall acquire the mutex in
26 priority order when the mutex is unlocked.
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29 If successful, the pthread_attr_getschedpolicy() and
30 pthread_attr_setschedpolicy() functions shall return zero; otherwise,
31 an error number shall be returned to indicate the error.
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34 The pthread_attr_setschedpolicy() function may fail if:
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36 EINVAL The value of policy is not valid.
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38 ENOTSUP
39 An attempt was made to set the attribute to an unsupported
40 value.
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43 These functions shall not return an error code of [EINTR].
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45 The following sections are informative.
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48 None.
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51 After these attributes have been set, a thread can be created with the
52 specified attributes using pthread_create(). Using these routines does
53 not affect the current running thread.
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56 None.
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59 None.
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62 pthread_attr_destroy() , pthread_attr_getscope() , pthread_attr_get‐
63 inheritsched() , pthread_attr_getschedparam() , pthread_create() , the
64 Base Definitions volume of IEEE Std 1003.1-2001, <pthread.h>, <sched.h>
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67 Portions of this text are reprinted and reproduced in electronic form
68 from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
69 -- Portable Operating System Interface (POSIX), The Open Group Base
70 Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
71 Electrical and Electronics Engineers, Inc and The Open Group. In the
72 event of any discrepancy between this version and the original IEEE and
73 The Open Group Standard, the original IEEE and The Open Group Standard
74 is the referee document. The original Standard can be obtained online
75 at http://www.opengroup.org/unix/online.html .
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79IEEE/The Open Group 2003 PTHREAD_ATTR_GETSCHEDPOLICY(P)