1PTHREAD_ATTR_GETSCHEDPOLICY(P3OPS)IX Programmer's MaPnTuHaRlEAD_ATTR_GETSCHEDPOLICY(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_getschedpolicy, pthread_attr_setschedpolicy - get and set
13 the schedpolicy attribute (REALTIME THREADS)
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16 #include <pthread.h>
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18 int pthread_attr_getschedpolicy(const pthread_attr_t *restrict attr,
19 int *restrict policy);
20 int pthread_attr_setschedpolicy(pthread_attr_t *attr, int policy);
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24 The pthread_attr_getschedpolicy() and pthread_attr_setschedpolicy()
25 functions, respectively, shall get and set the schedpolicy attribute in
26 the attr argument.
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28 The supported values of policy shall include SCHED_FIFO, SCHED_RR, and
29 SCHED_OTHER, which are defined in the <sched.h> header. When threads
30 executing with the scheduling policy SCHED_FIFO, SCHED_RR, or
31 SCHED_SPORADIC are waiting on a mutex, they shall acquire the mutex in
32 priority order when the mutex is unlocked.
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35 If successful, the pthread_attr_getschedpolicy() and
36 pthread_attr_setschedpolicy() functions shall return zero; otherwise,
37 an error number shall be returned to indicate the error.
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40 The pthread_attr_setschedpolicy() function may fail if:
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42 EINVAL The value of policy 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_getscope(), pthread_attr_getinher‐
69 itsched(), pthread_attr_getschedparam(), pthread_create(), the Base
70 Definitions volume of IEEE Std 1003.1-2001, <pthread.h>, <sched.h>
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73 Portions of this text are reprinted and reproduced in electronic form
74 from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
75 -- Portable Operating System Interface (POSIX), The Open Group Base
76 Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
77 Electrical and Electronics Engineers, Inc and The Open Group. In the
78 event of any discrepancy between this version and the original IEEE and
79 The Open Group Standard, the original IEEE and The Open Group Standard
80 is the referee document. The original Standard can be obtained online
81 at http://www.opengroup.org/unix/online.html .
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85IEEE/The Open Group 2003 PTHREAD_ATTR_GETSCHEDPOLICY(3P)