PTHREAD_ATTR_GETSTACK(3C)PTHREAD_ATTR_GETSTACK(3C)NAME
pthread_attr_getstack, pthread_attr_setstack - get or set stack
attributes
SYNOPSIS
cc -mt [ flag... ] file... -lpthread [ library... ]
#include <pthread.h>
int pthread_attr_getstack(const pthread_attr_t *restrict attr,
void **restrict stackaddr, size_t *restrict stacksize);
int pthread_attr_setstack(pthread_attr_t * attr, void *stackaddr,
size_t stacksize);
DESCRIPTION
The pthread_attr_getstack() and pthread_attr_setstack() functions,
respectively, get and set the thread creation stack attributes stack‐
addr and stacksize in the attr object.
The stack attributes specify the area of storage to be used for the
created thread's stack. The base (lowest addressable byte) of the stor‐
age is stackaddr, and the size of the storage is stacksize bytes. The
stacksize argument must be at least {PTHREAD_STACK_MIN}. The stackaddr
argument must be aligned appropriately to be used as a stack; for exam‐
ple, pthread_attr_setstack() might fail with EINVAL if (stackaddr &
0x7) is not 0. All pages within the stack described by stackaddr and
stacksize are both readable and writable by the thread.
RETURN VALUES
Upon successful completion, these functions return a 0; otherwise, an
error number is returned to indicate the error.
The pthread_attr_getstack() function stores the stack attribute values
in stackaddr and stacksize if successful.
ERRORS
The pthread_attr_setstack() function will fail if:
EINVAL
The value of stacksize is less than {PTHREAD_STACK_MIN}.
The pthread_attr_setstack() function may fail if:
EACCES
The stack page(s) described by stackaddr and stacksize are
not both readable and writable by the thread.
EINVAL
The value of stackaddr does not have proper alignment to be
used as a stack, or (stackaddr + stacksize) lacks proper
alignment.
USAGE
These functions are appropriate for use by applications in an environ‐
ment where the stack for a thread must be placed in some particular
region of memory.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌────────────────────┬───────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├────────────────────┼───────────────────┤
│Interface Stability │ Standard │
├────────────────────┼───────────────────┤
│MT-Level │ Async-Signal-Safe │
└────────────────────┴───────────────────┘
SEE ALSOpthread_attr_init(3C), pthread_attr_setdetachstate(3C),
pthread_attr_setstacksize(3C), pthread_create(3C), attributes(5)
Mar 23, 2005 PTHREAD_ATTR_GETSTACK(3C)
