1PTHREAD_ATTR_SETINHERITSCHEDL(i3n)ux Programmer's MaPnTuHaRlEAD_ATTR_SETINHERITSCHED(3)
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6 pthread_attr_setinheritsched, pthread_attr_getinheritsched - set/get
7 inherit scheduler attribute in thread attributes object
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10 #include <pthread.h>
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12 int pthread_attr_setinheritsched(pthread_attr_t *attr,
13 int inheritsched);
14 int pthread_attr_getinheritsched(pthread_attr_t *attr,
15 int *inheritsched);
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17 Compile and link with -pthread.
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20 The pthread_attr_setinheritsched() function sets the inherit scheduler
21 attribute of the thread attributes object referred to by attr to the
22 value specified in inheritsched. The inherit scheduler attribute
23 determines whether a thread created using the thread attributes object
24 attr will inherit its scheduling attributes from the calling thread or
25 whether it will take them from attr.
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27 The following values may be specified in inheritsched:
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29 PTHREAD_INHERIT_SCHED
30 Threads that are created using attr inherit scheduling
31 attributes from the creating thread; the scheduling attributes
32 in attr are ignored.
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34 PTHREAD_EXPLICIT_SCHED
35 Threads that are created using attr take their scheduling
36 attributes from the values specified by the attributes object.
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38 The default setting of the inherit scheduler attribute in a newly ini‐
39 tialized thread attributes object is PTHREAD_INHERIT_SCHED.
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41 The pthread_attr_getinheritsched() returns the inherit scheduler
42 attribute of the thread attributes object attr in the buffer pointed to
43 by inheritsched.
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46 On success, these functions return 0; on error, they return a nonzero
47 error number.
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50 pthread_attr_setinheritsched() can fail with the following error:
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52 EINVAL Invalid value in inheritsched.
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54 POSIX.1-2001 also documents an optional ENOTSUP error ("attempt was
55 made to set the attribute to an unsupported value") for
56 pthread_attr_setinheritsched().
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59 POSIX.1-2001.
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62 See pthread_setschedparam(3).
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65 As at glibc 2.8, if a thread attributes object is initialized using
66 pthread_attr_init(3), then the scheduling policy of the attributes
67 object is set to SCHED_OTHER and the scheduling priority is set to 0.
68 However, if the inherit scheduler attribute is then set to
69 PTHREAD_EXPLICIT_SCHED, then a thread created using the attribute
70 object wrongly inherits its scheduling attributes from the creating
71 thread. This bug does not occur if either the scheduling policy or
72 scheduling priority attribute is explicitly set in the thread
73 attributes object before calling pthread_create(3).
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76 sched_setscheduler(2), pthread_attr_init(3), pthread_attr_setsched‐
77 param(3), pthread_attr_setschedpolicy(3), pthread_create(3),
78 pthread_setschedparam(3), pthread_setschedprio(3), pthreads(7)
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81 This page is part of release 3.25 of the Linux man-pages project. A
82 description of the project, and information about reporting bugs, can
83 be found at http://www.kernel.org/doc/man-pages/.
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87Linux 2008-11-10 PTHREAD_ATTR_SETINHERITSCHED(3)