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1 | .\" Copyright (c) 2008 Linux Foundation, written by Michael Kerrisk |
2 | .\" <mtk.manpages@gmail.com> | |
3 | .\" | |
93015253 | 4 | .\" %%%LICENSE_START(VERBATIM) |
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5 | .\" Permission is granted to make and distribute verbatim copies of this |
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9 | .\" Permission is granted to copy and distribute modified versions of this | |
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4b72fb64 | 24 | .\" %%%LICENSE_END |
5a8b01e1 | 25 | .\" |
22cb459d | 26 | .TH PTHREAD_ATTR_SETSTACKSIZE 3 2012-03-15 "Linux" "Linux Programmer's Manual" |
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27 | .SH NAME |
28 | pthread_attr_setstacksize, pthread_attr_getstacksize \- set/get stack size | |
29 | attribute in thread attributes object | |
30 | .SH SYNOPSIS | |
31 | .nf | |
32 | .B #include <pthread.h> | |
33 | ||
34 | .BI "int pthread_attr_setstacksize(pthread_attr_t *" attr \ | |
35 | ", size_t " stacksize ); | |
36 | .BI "int pthread_attr_getstacksize(pthread_attr_t *" attr \ | |
37 | ", size_t *" stacksize ); | |
38 | .sp | |
39 | Compile and link with \fI\-pthread\fP. | |
6030f2d8 | 40 | .fi |
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41 | .SH DESCRIPTION |
42 | The | |
630a1725 | 43 | .BR pthread_attr_setstacksize () |
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44 | function sets the stack size attribute of the |
45 | thread attributes object referred to by | |
46 | .I attr | |
47 | to the value specified in | |
48 | .IR stacksize . | |
49 | ||
50 | The stack size attribute determines the minimum size (in bytes) that | |
51 | will be allocated for threads created using the thread attributes object | |
52 | .IR attr . | |
53 | ||
54 | The | |
55 | .BR pthread_attr_getstacksize () | |
56 | function returns the stack size attribute of the | |
57 | thread attributes object referred to by | |
58 | .I attr | |
59 | in the buffer pointed to by | |
60 | .IR stacksize . | |
61 | .SH RETURN VALUE | |
62 | On success, these functions return 0; | |
c7094399 | 63 | on error, they return a nonzero error number. |
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64 | .SH ERRORS |
65 | .BR pthread_attr_setstacksize () | |
66 | can fail with the following error: | |
67 | .TP | |
68 | .B EINVAL | |
69 | The stack size is less than | |
70 | .BR PTHREAD_STACK_MIN | |
71 | (16384) bytes. | |
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72 | .PP |
73 | On some systems, | |
74 | .\" e.g., MacOS | |
75 | .BR pthread_attr_setstacksize () | |
76 | can fail with the error | |
77 | .B EINVAL | |
78 | if | |
79 | .I stacksize | |
80 | is not a multiple of the system page size. | |
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81 | .SH VERSIONS |
82 | These functions are provided by glibc since version 2.1. | |
83 | .SH CONFORMING TO | |
84 | POSIX.1-2001. | |
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85 | .SH NOTES |
86 | For details on the default stack size of new threads, see | |
87 | .BR pthread_create (3). | |
88 | ||
89 | A thread's stack size is fixed at the time of thread creation. | |
90 | Only the main thread can dynamically grow its stack. | |
91 | ||
92 | The | |
93 | .BR pthread_attr_setstack (3) | |
94 | function allows an application to set both the size and location | |
95 | of a caller-allocated stack that is to be used by a thread. | |
96 | .SH BUGS | |
97 | As at glibc 2.8, | |
98 | if the specified | |
99 | .I stacksize | |
100 | is not a multiple of | |
101 | .BR STACK_ALIGN | |
102 | (16 bytes on most architectures), it may be rounded | |
5fab2e7c | 103 | .IR downward , |
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104 | in violation of POSIX.1-2001, which says that the allocated stack will |
105 | be at least | |
106 | .I stacksize | |
107 | bytes. | |
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108 | .SH EXAMPLE |
109 | See | |
110 | .BR pthread_create (3). | |
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111 | .SH SEE ALSO |
112 | .BR getrlimit (2), | |
113 | .BR pthread_attr_init (3), | |
114 | .BR pthread_attr_setguardsize (3), | |
115 | .BR pthread_attr_setstack (3), | |
116 | .BR pthread_create (3), | |
117 | .BR pthreads (7) |