1PTHREAD_ATTR_GETSCHEDPARAM(3PPO)SIX Programmer's ManPuTaHlREAD_ATTR_GETSCHEDPARAM(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_getschedparam, pthread_attr_setschedparam - get and set
13 the schedparam attribute
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16 #include <pthread.h>
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18 int pthread_attr_getschedparam(const pthread_attr_t *restrict attr,
19 struct sched_param *restrict param);
20 int pthread_attr_setschedparam(pthread_attr_t *restrict attr,
21 const struct sched_param *restrict param);
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25 The pthread_attr_getschedparam(), and pthread_attr_setschedparam()
26 functions, respectively, shall get and set the scheduling parameter
27 attributes in the attr argument. The contents of the param structure
28 are defined in the <sched.h> header. For the SCHED_FIFO and SCHED_RR
29 policies, the only required member of param is sched_priority.
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31 For the SCHED_SPORADIC policy, the required members of the param struc‐
32 ture are sched_priority, sched_ss_low_priority, sched_ss_repl_period,
33 sched_ss_init_budget, and sched_ss_max_repl. The specified
34 sched_ss_repl_period must be greater than or equal to the specified
35 sched_ss_init_budget for the function to succeed; if it is not, then
36 the function shall fail. The value of sched_ss_max_repl shall be within
37 the inclusive range [1, {SS_REPL_MAX}] for the function to succeed; if
38 not, the function shall fail.
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41 If successful, the pthread_attr_getschedparam() and
42 pthread_attr_setschedparam() functions shall return zero; otherwise, an
43 error number shall be returned to indicate the error.
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46 The pthread_attr_setschedparam() function may fail if:
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48 EINVAL The value of param is not valid.
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50 ENOTSUP
51 An attempt was made to set the attribute to an unsupported
52 value.
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55 These functions shall not return an error code of [EINTR].
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57 The following sections are informative.
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60 None.
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63 After these attributes have been set, a thread can be created with the
64 specified attributes using pthread_create(). Using these routines does
65 not affect the current running thread.
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68 None.
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71 None.
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74 pthread_attr_destroy(), pthread_attr_getscope(), pthread_attr_getinher‐
75 itsched(), pthread_attr_getschedpolicy(), pthread_create(), the Base
76 Definitions volume of IEEE Std 1003.1-2001, <pthread.h>, <sched.h>
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79 Portions of this text are reprinted and reproduced in electronic form
80 from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
81 -- Portable Operating System Interface (POSIX), The Open Group Base
82 Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
83 Electrical and Electronics Engineers, Inc and The Open Group. In the
84 event of any discrepancy between this version and the original IEEE and
85 The Open Group Standard, the original IEEE and The Open Group Standard
86 is the referee document. The original Standard can be obtained online
87 at http://www.opengroup.org/unix/online.html .
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91IEEE/The Open Group 2003 PTHREAD_ATTR_GETSCHEDPARAM(3P)