Originální popis anglicky:
pthread_attr_getstack, pthread_attr_setstack - get and set stack attributes
Návod, kniha: POSIX Programmer's Manual
#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);
The
pthread_attr_getstack() and
pthread_attr_setstack() functions,
respectively, shall get and set the thread creation stack attributes
stackaddr 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 storage shall be
stackaddr, and the size of the storage shall be
stacksize bytes.
The
stacksize shall be at least {PTHREAD_STACK_MIN}. The
stackaddr shall be aligned appropriately to be used as a stack; for
example,
pthread_attr_setstack() may fail with [EINVAL] if (
stackaddr & 0x7) is not 0. All pages within the stack described by
stackaddr and
stacksize shall be both readable and writable by
the thread.
Upon successful completion, these functions shall return a value of 0;
otherwise, an error number shall be returned to indicate the error.
The
pthread_attr_getstack() function shall store the stack attribute
values in
stackaddr and
stacksize if successful.
The
pthread_attr_setstack() function shall fail if:
- EINVAL
- The value of stacksize is less than
{PTHREAD_STACK_MIN} or exceeds an implementation-defined limit.
The
pthread_attr_setstack() function may fail if:
- EINVAL
- The value of stackaddr does not have proper
alignment to be used as a stack, or if ( stackaddr +
stacksize) lacks proper alignment.
- EACCES
- The stack page(s) described by stackaddr and
stacksize are not both readable and writable by the thread.
These functions shall not return an error code of [EINTR].
The following sections are informative.
None.
These functions are appropriate for use by applications in an environment where
the stack for a thread must be placed in some particular region of memory.
While it might seem that an application could detect stack overflow by providing
a protected page outside the specified stack region, this cannot be done
portably. Implementations are free to place the thread's initial stack pointer
anywhere within the specified region to accommodate the machine's stack
pointer behavior and allocation requirements. Furthermore, on some
architectures, such as the IA-64, "overflow" might mean that two
separate stack pointers allocated within the region will overlap somewhere in
the middle of the region.
None.
None.
pthread_attr_init() ,
pthread_attr_setdetachstate() ,
pthread_attr_setstacksize() ,
pthread_create() , the Base
Definitions volume of IEEE Std 1003.1-2001,
<limits.h>,
<pthread.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy between
this version and the original IEEE and The Open Group Standard, the original
IEEE and The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.opengroup.org/unix/online.html
.
