NAME

pthread_attr_getstacksize, pthread_attr_setstacksize - get and set the stacksize attribute

SYNOPSIS

[TSS] #include <pthread.h>

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

DESCRIPTION

The pthread_attr_getstacksize() and pthread_attr_setstacksize() functions, respectively, shall get and set the thread creation stacksize attribute in the attr object.

The stacksize attribute shall define the minimum stack size (in bytes) allocated for the created threads stack.

The behavior is undefined if the value specified by the attr argument to pthread_attr_getstacksize() or pthread_attr_setstacksize() does not refer to an initialized thread attributes object.

RETURN VALUE

Upon successful completion, pthread_attr_getstacksize() and pthread_attr_setstacksize() shall return a value of 0; otherwise, an error number shall be returned to indicate the error.

The pthread_attr_getstacksize() function stores the stacksize attribute value in stacksize if successful.

ERRORS

The pthread_attr_setstacksize() function shall fail if:

[EINVAL]

The value of stacksize is less than {PTHREAD_STACK_MIN} or exceeds a system-imposed limit.

These functions shall not return an error code of [EINTR].

EXAMPLES

None.

APPLICATION USAGE

None.

RATIONALE

If an implementation detects that the value specified by the attr argument to pthread_attr_getstacksize() or pthread_attr_setstacksize() does not refer to an initialized thread attributes object, it is recommended that the function should fail and report an [EINVAL] error.

FUTURE DIRECTIONS

None.

SEE ALSO

pthread_attr_destroy, pthread_attr_getdetachstate, pthread_create

XBD <limits.h>, <pthread.h>

CHANGE HISTORY

First released in Issue 5. Included for alignment with the POSIX Threads Extension.

Issue 6

The pthread_attr_getstacksize() and pthread_attr_setstacksize() functions are marked as part of the Threads and Thread Stack Size Attribute options.

The restrict keyword is added to the pthread_attr_getstacksize() prototype for alignment with the ISO/IEC 9899:1999 standard.

IEEE Std 1003.1-2001/Cor 1-2002, item XSH/TC1/D6/43 is applied, correcting the margin code in the SYNOPSIS from TSA to TSS and updating the CHANGE HISTORY from ``Thread Stack Address Attribute'' option to ``Thread Stack Size Attribute'' option.

IEEE Std 1003.1-2001/Cor 2-2004, item XSH/TC2/D6/87 is applied, updating the ERRORS section to include optional errors for the case when attr refers to an uninitialized thread attribute object.

Issue 7

The pthread_attr_getstacksize() and pthread_attr_setstacksize() functions are marked only as part of the Thread Stack Size Attribute option as the Threads option is now part of the Base.

The [EINVAL] error for an uninitialized thread attributes object is removed; this condition results in undefined behavior.

POSIX.1-2008, Technical Corrigendum 2, XSH/TC2-2008/0265 [757] is applied.