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| <H4>POSIX Threads for Windows – REFERENCE - <A HREF="http://sources.redhat.com/pthreads-win32">Pthreads-w32</A></H4> | |
| <P><A HREF="index.html">Reference Index</A></P> | |
| <P><A HREF="#toc">Table of Contents</A></P> | |
| <H2><A HREF="#toc0" NAME="sect0">Name</A></H2> | |
| <P>pthread_attr_getstackaddr, pthread_attr_setstackaddr - get and set | |
| the stackaddr attribute | |
| </P> | |
| <H2><A HREF="#toc1" NAME="sect1">Synopsis</A></H2> | |
| <P><B>#include <pthread.h> </B> | |
| </P> | |
| <P><B>int pthread_attr_getstackaddr(const pthread_attr_t *restrict</B> | |
| <I>attr</I><B>, void **restrict</B> <I>stackaddr</I><B>); <BR>int | |
| pthread_attr_setstackaddr(pthread_attr_t *</B><I>attr</I><B>, void | |
| *</B><I>stackaddr</I><B>); </B> | |
| </P> | |
| <H2><A HREF="#toc2" NAME="sect2">Description</A></H2> | |
| <P>The <B>pthread_attr_getstackaddr</B> and <B>pthread_attr_setstackaddr</B> | |
| functions, respectively, shall get and set the thread creation | |
| <I>stackaddr</I> attribute in the <I>attr</I> object. | |
| </P> | |
| <P>The <I>stackaddr</I> attribute specifies the location of storage | |
| to be used for the created thread’s stack. The size of the storage | |
| shall be at least {PTHREAD_STACK_MIN}. | |
| </P> | |
| <P><B>Pthreads-w32</B> defines <B>_POSIX_THREAD_ATTR_STACKADDR</B> in | |
| pthread.h as -1 to indicate that these routines are implemented but | |
| cannot used to set or get the stack address. These routines always | |
| return the error ENOSYS when called.</P> | |
| <H2><A HREF="#toc3" NAME="sect3">Return Value</A></H2> | |
| <P>Upon successful completion, <B>pthread_attr_getstackaddr</B> and | |
| <B>pthread_attr_setstackaddr</B> shall return a value of 0; | |
| otherwise, an error number shall be returned to indicate the error. | |
| </P> | |
| <P>The <B>pthread_attr_getstackaddr</B> function stores the <I>stackaddr</I> | |
| attribute value in <I>stackaddr</I> if successful. | |
| </P> | |
| <H2><A HREF="#toc4" NAME="sect4">Errors</A></H2> | |
| <P>The <B>pthread_attr_setstackaddr</B> function always returns the | |
| following error code: | |
| </P> | |
| <DL> | |
| <DL> | |
| <DT STYLE="margin-right: 1cm; margin-bottom: 0.5cm"><B>ENOSYS</B></DT><DD STYLE="margin-right: 1cm; margin-bottom: 0.5cm"> | |
| The function is not supported. | |
| </DD></DL> | |
| </DL> | |
| <P> | |
| The <B>pthread_attr_getstackaddr</B> function always returns the | |
| following error code: | |
| </P> | |
| <DL> | |
| <DL> | |
| <DT STYLE="margin-right: 1cm; margin-bottom: 0.5cm"><B>ENOSYS</B></DT><DD STYLE="margin-right: 1cm; margin-bottom: 0.5cm"> | |
| The function is not supported. | |
| </DD></DL> | |
| </DL> | |
| <P> | |
| These functions shall not return an error code of [EINTR]. | |
| </P> | |
| <P><I>The following sections are informative.</I> | |
| </P> | |
| <H2><A HREF="#toc5" NAME="sect5">Examples</A></H2> | |
| <P>None. | |
| </P> | |
| <H2><A HREF="#toc6" NAME="sect6">Application Usage</A></H2> | |
| <P>The specification of the <I>stackaddr</I> attribute presents | |
| several ambiguities that make portable use of these interfaces | |
| impossible. The description of the single address parameter as a | |
| "stack" does not specify a particular relationship between | |
| the address and the "stack" implied by that address. For | |
| example, the address may be taken as the low memory address of a | |
| buffer intended for use as a stack, or it may be taken as the address | |
| to be used as the initial stack pointer register value for the new | |
| thread. These two are not the same except for a machine on which the | |
| stack grows "up" from low memory to high, and on which a | |
| "push" operation first stores the value in memory and then | |
| increments the stack pointer register. Further, on a machine where | |
| the stack grows "down" from high memory to low, | |
| interpretation of the address as the "low memory" address | |
| requires a determination of the intended size of the stack. | |
| IEEE Std 1003.1-2001 has introduced the new interfaces | |
| <A HREF="pthread_attr_setstack.html"><B>pthread_attr_setstack</B>(3)</A> | |
| and <A HREF="pthread_attr_getstack.html"><B>pthread_attr_getstack</B>(3)</A> | |
| to resolve these ambiguities. | |
| </P> | |
| <H2><A HREF="#toc7" NAME="sect7">Rationale</A></H2> | |
| <P>None. | |
| </P> | |
| <H2><A HREF="#toc8" NAME="sect8">Future Directions</A></H2> | |
| <P>None. | |
| </P> | |
| <H2><A HREF="#toc9" NAME="sect9">See Also</A></H2> | |
| <P><A HREF="pthread_attr_init.html"><B>pthread_attr_destroy</B>(3)</A> | |
| , <A HREF="pthread_attr_init.html"><B>pthread_attr_getdetachstate</B>(3)</A> | |
| , <A HREF="pthread_attr_getstack.html"><B>pthread_attr_getstack</B>(3)</A> | |
| , <A HREF="pthread_attr_getstacksize.html"><B>pthread_attr_getstacksize</B>(3)</A> | |
| , <A HREF="pthread_attr_setstack.html"><B>pthread_attr_setstack</B>(3)</A> | |
| , <A HREF="pthread_create.html"><B>pthread_create</B>(3)</A> , the | |
| Base Definitions volume of IEEE Std 1003.1-2001, | |
| <I><limits.h></I>, <I><pthread.h></I> | |
| </P> | |
| <H2><A HREF="#toc10" NAME="sect10">Copyright</A></H2> | |
| <P>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 <A HREF="http://www.opengroup.org/unix/online.html">http://www.opengroup.org/unix/online.html</A> | |
| . | |
| </P> | |
| <P>Modified by Ross Johnson for use with <A HREF="http://sources.redhat.com/pthreads-win32">Pthreads-w32</A>.</P> | |
| <HR> | |
| <P><A NAME="toc"></A><B>Table of Contents</B></P> | |
| <UL> | |
| <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect0" NAME="toc0">Name</A> | |
| </P> | |
| <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect1" NAME="toc1">Synopsis</A> | |
| </P> | |
| <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect2" NAME="toc2">Description</A> | |
| </P> | |
| <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect3" NAME="toc3">Return | |
| Value</A> | |
| </P> | |
| <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect4" NAME="toc4">Errors</A> | |
| </P> | |
| <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect5" NAME="toc5">Examples</A> | |
| </P> | |
| <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect6" NAME="toc6">Application | |
| Usage</A> | |
| </P> | |
| <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect7" NAME="toc7">Rationale</A> | |
| </P> | |
| <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect8" NAME="toc8">Future | |
| Directions</A> | |
| </P> | |
| <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect9" NAME="toc9">See | |
| Also</A> | |
| </P> | |
| <LI><P><A HREF="#sect10" NAME="toc10">Copyright</A> | |
| </P> | |
| </UL> | |
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