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pthread_attr_setstackaddr(3) [osf1 man page]

pthread_attr_setstackaddr(3)				     Library Functions Manual				      pthread_attr_setstackaddr(3)

NAME
pthread_attr_setstackaddr - Changes the stack address attribute of the specified thread attributes object. LIBRARY
DECthreads POSIX 1003.1c Library (libpthread.so) SYNOPSIS
#include <pthread.h> int pthread_attr_setstackaddr( pthread_attr_t *attr, void *stackaddr); STANDARDS
Interfaces documented on this reference page conform to industry standards as follows: IEEE Std 1003.1c-1995, POSIX System Application Program Interface PARAMETERS
Address of the thread attributes object whose stack address attribute is to be modified. New value for the stack address attribute of the thread attributes object specified by attr. DESCRIPTION
This routine uses the value specified in the stackaddr argument to set the stack address attribute of the thread attributes object speci- fied in the attr argument. When creating a thread, use a thread attributes object to specify nondefault values for thread attributes. The stack address attribute of a thread attributes object points to the origin of the stack for a new thread. The default value for the stack address attribute of an initialized thread attributes object is NULL. For your program to calculate a value for the stackaddr attribute, note that: Your program must allocate the memory that will be used for the new thread's stack. On Tru64 UNIX, to create a new thread using a thread attributes object, the stackaddr attribute must be an address that points to the high-memory end of the memory region allocated for the stack. This address must point to the highest even-boundary quad- word in the allocated memory region. Also note that: If you use the pthread_attr_setstackaddr(3) routine to set a thread attributes object's stack address attribute and use that attributes object to create a new thread, DECthreads ignores the attributes object's guard- size attribute and provides no thread stack guard area for the new thread. If you use the same thread attributes object to create more than one thread and each created thread uses a nondefault stack address, you must use the pthread_attr_setstackaddr(3) routine to set a unique stack address attribute value for each new thread created using that attributes object. NOTES
Correct use of this routine depends upon details of the target platform's stack architecture. Thus, this routine cannot be used in a por- table manner. The size of the stack must be at least PTHREAD_STACK_MIN bytes (see pthread.h). However, because DECthreads must use a portion of this stack memory to begin thread execution and to maintain thread state, your program's "user thread code" cannot rely on using all of the stack memory allocated. RETURN VALUES
If an error condition occurs, this routine returns an integer value indicating the type of error. Possible return values are as follows: Successful completion. ERRORS
None RELATED INFORMATION
Functions: pthread_attr_getguardsize(3), pthread_attr_getstackaddr(3), pthread_attr_getstacksize(3), pthread_attr_init(3), pthread_attr_setguardsize(3), pthread_attr_setstacksize(3), pthread_create(3) Manuals: Guide to DECthreads and Programmer's Guide delim off pthread_attr_setstackaddr(3)

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PTHREAD_ATTR_SETSTACKADDR(3)				     Linux Programmer's Manual				      PTHREAD_ATTR_SETSTACKADDR(3)

NAME
pthread_attr_setstackaddr, pthread_attr_getstackaddr - set/get stack address attribute in thread attributes object SYNOPSIS
#include <pthread.h> int pthread_attr_setstackaddr(pthread_attr_t *attr, void *stackaddr); int pthread_attr_getstackaddr(pthread_attr_t *attr, void **stackaddr); Compile and link with -pthread. DESCRIPTION
These functions are obsolete: do not use them. Use pthread_attr_setstack(3) and pthread_attr_getstack(3) instead. The pthread_attr_setstackaddr() function sets the stack address attribute of the thread attributes object referred to by attr to the value specified in stackaddr. This attribute specifies the location of the stack that should be used by a thread that is created using the thread attributes object attr. stackaddr should point to a buffer of at least PTHREAD_STACK_MIN bytes that was allocated by the caller. The pages of the allocated buffer should be both readable and writable. The pthread_attr_getstackaddr() function returns the stack address attribute of the thread attributes object referred to by attr in the buffer pointed to by stackaddr. RETURN VALUE
On success, these functions return 0; on error, they return a nonzero error number. ERRORS
No errors are defined (but applications should nevertheless handle a possible error return). VERSIONS
These functions are provided by glibc since version 2.1. CONFORMING TO
POSIX.1-2001 specifies these functions but marks them as obsolete. POSIX.1-2008 removes the specification of these functions. NOTES
Do not use these functions! They cannot be portably used, since they provide no way of specifying the direction of growth or the range of the stack. For example, on architectures with a stack that grows downwards, stackaddr specifies the next address past the highest address of the allocated stack area. However, on architectures with a stack that grows upwards, stackaddr specifies the lowest address in the allocated stack area. By contrast, the stackaddr used by pthread_attr_setstack(3) and pthread_attr_getstack(3), is always a pointer to the lowest address in the allocated stack area (and the stacksize argument specifies the range of the stack). SEE ALSO
pthread_attr_init(3), pthread_attr_setstack(3), pthread_attr_setstacksize(3), pthread_create(3), pthreads(7) COLOPHON
This page is part of release 3.27 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. Linux 2008-10-24 PTHREAD_ATTR_SETSTACKADDR(3)
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