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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(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.

CONFORMING TO

       POSIX.1-2001.

EXAMPLE

       See pthread_create(3).

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.1-2001, which says that  the  allocated
       stack will be at least stacksize bytes.

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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