pthread_attr_getstacksize(3)

1pthread_attr_setstacksize(3)Library Functions Manualpthread_attr_setstacksize(3)
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NAME

6       pthread_attr_setstacksize,  pthread_attr_getstacksize  -  set/get stack
7       size attribute in thread attributes object
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LIBRARY

10       POSIX threads library (libpthread, -lpthread)
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SYNOPSIS

13       #include <pthread.h>
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15       int pthread_attr_setstacksize(pthread_attr_t *attr, size_t stacksize);
16       int pthread_attr_getstacksize(const pthread_attr_t *restrict attr,
17                                     size_t *restrict stacksize);
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DESCRIPTION

20       The pthread_attr_setstacksize() function sets the stack size  attribute
21       of the thread attributes object referred to by attr to the value speci‐
22       fied in stacksize.
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24       The stack size attribute determines the minimum size  (in  bytes)  that
25       will  be  allocated for threads created using the thread attributes ob‐
26       ject attr.
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28       The pthread_attr_getstacksize() function returns the stack size  attri‐
29       bute  of the thread attributes object referred to by attr in the buffer
30       pointed to by stacksize.
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RETURN VALUE

33       On success, these functions return 0; on error, they return  a  nonzero
34       error number.
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ERRORS

37       pthread_attr_setstacksize() can fail with the following error:
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39       EINVAL The stack size is less than PTHREAD_STACK_MIN (16384) bytes.
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41       On  some  systems,  pthread_attr_setstacksize() can fail with the error
42       EINVAL if stacksize is not a multiple of the system page size.
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ATTRIBUTES

45       For an  explanation  of  the  terms  used  in  this  section,  see  at‐
46       tributes(7).
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48       ┌────────────────────────────────────────────┬───────────────┬─────────┐
49       │Interface                                   │ Attribute     │ Value   │
50       ├────────────────────────────────────────────┼───────────────┼─────────┤
51       │pthread_attr_setstacksize(),                │ Thread safety │ MT-Safe │
52       │pthread_attr_getstacksize()                 │               │         │
53       └────────────────────────────────────────────┴───────────────┴─────────┘
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VERSIONS

56       These functions are provided since glibc 2.1.
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STANDARDS

59       POSIX.1-2001, POSIX.1-2008.
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NOTES

62       For details on the default stack size of new threads, see  pthread_cre‐
63       ate(3).
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65       A  thread's  stack  size is fixed at the time of thread creation.  Only
66       the main thread can dynamically grow its stack.
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68       The pthread_attr_setstack(3) function allows an application to set both
69       the size and location of a caller-allocated stack that is to be used by
70       a thread.
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BUGS

73       As at glibc 2.8, if the  specified  stacksize  is  not  a  multiple  of
74       STACK_ALIGN  (16  bytes on most architectures), it may be rounded down‐
75       ward, in violation of POSIX.1, which says that the allocated stack will
76       be at least stacksize bytes.
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EXAMPLES

79       See pthread_create(3).
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