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12 .TH PTHREAD_ATTR_INIT 3C "Dec 10, 2015"
14 pthread_attr_init, pthread_attr_destroy \- initialize or destroy threads
19 cc -mt [ \fIflag\fR... ] \fIfile\fR... -lpthread [ \fIlibrary\fR... ]
22 \fBint\fR \fBpthread_attr_init\fR(\fBpthread_attr_t *\fR\fIattr\fR);
27 \fBint\fR \fBpthread_attr_destroy\fR(\fBpthread_attr_t *\fR\fIattr\fR);
32 The function \fBpthread_attr_init()\fR initializes a thread attributes object
33 \fIattr\fR with the default value for all of the individual attributes used by
34 a given implementation.
37 The resulting attribute object (possibly modified by setting individual
38 attribute values), when used by \fBpthread_create()\fR, defines the attributes
39 of the thread created. A single attributes object can be used in multiple
40 simultaneous calls to \fBpthread_create()\fR.
43 The \fBpthread_attr_init()\fR function initializes a thread attributes object (
44 \fIattr\fR) with the default value for each attribute as follows:
51 Attribute Default Value Meaning of Default
53 \fIcontentionscope\fR \fBPTHREAD_SCOPE_PROCESS\fR resource competition within process
54 \fIdetachstate\fR \fBPTHREAD_CREATE_JOINABLE\fR joinable by other threads
55 \fIstackaddr\fR \fBNULL\fR stack allocated by system
56 \fIstacksize\fR 0 1 or 2 megabyte
57 \fIpriority\fR 0 priority of the thread
58 \fIpolicy\fR \fBSCHED_OTHER\fR traditional time-sharing policy
59 \fIinheritsched\fR \fBPTHREAD_INHERIT_SCHED\fR T{
60 scheduling policy and parameters are inherited from the creating thread
62 \fIguardsize\fR \fBPAGESIZE\fR T{
63 size of guard area for a thread's created stack
69 The \fBpthread_attr_destroy()\fR function destroys a thread attributes object (
70 \fIattr\fR), which cannot be reused until it is reinitialized. An
71 implementation may cause \fBpthread_attr_destroy()\fR to set \fIattr\fR to an
72 implementation-dependent invalid value. The behavior of using the attribute
73 after it has been destroyed is undefined.
76 Upon successful completion, \fBpthread_attr_init()\fR and
77 \fBpthread_attr_destroy()\fR return a value of \fB0\fR. Otherwise, an error
78 number is returned to indicate the error.
81 The \fBpthread_attr_init()\fR function will fail if:
88 Insufficient memory exists to initialize the thread attributes object.
93 The \fBpthread_attr_destroy()\fR function may fail if:
100 \fIattr\fR is invalid.
105 See \fBattributes\fR(5) for descriptions of the following attributes:
113 ATTRIBUTE TYPE ATTRIBUTE VALUE
115 Interface Stability Committed
119 Standard See \fBstandards\fR(5).
124 \fBsysconf\fR(3C), \fBpthread_attr_getdetachstate\fR(3C),
125 \fBpthread_attr_get_np\fR(3C),
126 \fBpthread_attr_getguardsize\fR(3C), \fBpthread_attr_getinheritsched\fR(3C),
127 \fBpthread_attr_getschedparam\fR(3C), \fBpthread_attr_getschedpolicy\fR(3C),
128 \fBpthread_attr_getscope\fR(3C), \fBpthread_attr_getstackaddr\fR(3C),
129 \fBpthread_attr_getstacksize\fR(3C), \fBpthread_attr_setdetachstate\fR(3C),
130 \fBpthread_attr_setguardsize\fR(3C), \fBpthread_attr_setinheritsched\fR(3C),
131 \fBpthread_attr_setschedparam\fR(3C), \fBpthread_attr_setschedpolicy\fR(3C),
132 \fBpthread_attr_setscope\fR(3C), \fBpthread_attr_setstackaddr\fR(3C),
133 \fBpthread_attr_setstacksize\fR(3C), \fBpthread_create\fR(3C),
134 \fBattributes\fR(5), \fBstandards\fR(5)