NAME

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

SYNOPSIS

       #include <pthread.h>

       int pthread_attr_setstacksize(pthread_attr_t *attr, size_t stacksize);
       int pthread_attr_getstacksize(const pthread_attr_t *attr, size_t *stacksize);

       Compile and link with -pthread.

DESCRIPTION

       The pthread_attr_setstacksize() function sets the stack size attribute of the  thread  attributes  object
       referred to by attr to the value specified in stacksize.

       The  stack  size  attribute  determines  the  minimum  size (in bytes) that will be allocated for threads
       created using the thread attributes object attr.

       The pthread_attr_getstacksize() function returns the stack size attribute of the thread attributes object
       referred to by attr in the buffer pointed to by stacksize.

RETURN VALUE

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

ERRORS

       pthread_attr_setstacksize() can fail with the following error:

       EINVAL The stack size is less than PTHREAD_STACK_MIN (16384) bytes.

       On  some  systems,  pthread_attr_setstacksize()  can  fail  with  the  error EINVAL if stacksize is not a
       multiple of the system page size.

VERSIONS

       These functions are provided by glibc since version 2.1.

ATTRIBUTES

       For an explanation of the terms used in this section, see attributes(7).

       ┌─────────────────────────────┬───────────────┬─────────┐
       │Interface                    │ Attribute     │ Value   │
       ├─────────────────────────────┼───────────────┼─────────┤
       │pthread_attr_setstacksize(), │ Thread safety │ MT-Safe │
       │pthread_attr_getstacksize()  │               │         │
       └─────────────────────────────┴───────────────┴─────────┘

CONFORMING TO

       POSIX.1-2001, POSIX.1-2008.

NOTES

       For details on the default stack size of new threads, see pthread_create(3).

       A thread's stack size is fixed at the time of thread creation.  Only the main thread can dynamically grow
       its stack.

       The pthread_attr_setstack(3) function allows an application to set  both  the  size  and  location  of  a
       caller-allocated stack that is to be used by a thread.

BUGS

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

EXAMPLE

       See pthread_create(3).

SEE ALSO

       getrlimit(2),      pthread_attr_init(3),      pthread_attr_setguardsize(3),     pthread_attr_setstack(3),
       pthread_create(3), pthreads(7)

COLOPHON

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