NAME

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

LIBRARY

       POSIX threads library (libpthread, -lpthread)

SYNOPSIS

       #include <pthread.h>

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

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.

ATTRIBUTES

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

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

VERSIONS

       These functions are provided since glibc 2.1.

STANDARDS

       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.

EXAMPLES

       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)