"PTHREAD_CONDATTR_GETPSHARED"(P) manual page

From 41f88a82b33cdb357c83b582381232733ed2d039 Mon Sep 17 00:00:00 2001 From: rpj Date: Thu, 5 May 2005 14:18:27 +0000 Subject: '' --- manual/pthread_condattr_setpshared.html | 151 ++++++++++++++++++++++++++++++++ 1 file changed, 151 insertions(+) create mode 100644 manual/pthread_condattr_setpshared.html (limited to 'manual/pthread_condattr_setpshared.html') diff --git a/manual/pthread_condattr_setpshared.html b/manual/pthread_condattr_setpshared.html new file mode 100644 index 0000000..f3bdd38 --- /dev/null +++ b/manual/pthread_condattr_setpshared.html @@ -0,0 +1,151 @@ + + + + + "PTHREAD_CONDATTR_GETPSHARED"(P) manual page + + + + + + + +

Table of Contents

Name

pthread_condattr_getpshared, pthread_condattr_setpshared - get and +set the process-shared condition variable attributes +

Synopsis

#include <pthread.h> +

int pthread_condattr_getpshared(const pthread_condattr_t +*restrict attr, int *restrict pshared); +
int pthread_condattr_setpshared(pthread_condattr_t *attr, +int pshared); +

Description

The pthread_condattr_getpshared function shall obtain the +value of the process-shared attribute from the attributes +object referenced by attr. The pthread_condattr_setpshared +function shall set the process-shared attribute in an +initialized attributes object referenced by attr. +

The process-shared attribute is set to +PTHREAD_PROCESS_SHARED to permit a condition variable to be +operated upon by any thread that has access to the memory where the +condition variable is allocated, even if the condition variable is +allocated in memory that is shared by multiple processes. If the +process-shared attribute is PTHREAD_PROCESS_PRIVATE, +the condition variable shall only be operated upon by threads created +within the same process as the thread that initialized the condition +variable; if threads of differing processes attempt to operate on +such a condition variable, the behavior is undefined. The default +value of the attribute is PTHREAD_PROCESS_PRIVATE. +

Pthreads-w32 defines _POSIX_THREAD_PROCESS_SHARED in +pthread.h as -1 to indicate that these routines are implemented but +that the process shared attribute is not supported.

Return Value

If successful, the pthread_condattr_setpshared function +shall return zero; otherwise, an error number shall be returned to +indicate the error. +

If successful, the pthread_condattr_getpshared function +shall return zero and store the value of the process-shared +attribute of attr into the object referenced by the pshared +parameter. Otherwise, an error number shall be returned to indicate +the error. +

Errors

The pthread_condattr_getpshared and +pthread_condattr_setpshared functions may fail if: +

EINVAL +: + The value specified by attr is invalid. +

+The pthread_condattr_setpshared function may fail if: +

EINVAL +: + The new value specified for the attribute is outside the range of + legal values for that attribute. +
+ ENOSYS +: + The value specified by attr was PTHREAD_PROCESS_SHARED + (Pthreads-w32).

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

The following sections are informative. +

Examples

None. +

Application Usage

Pthreads-w32 defines _POSIX_THREAD_PROCESS_SHARED in +pthread.h as -1 to indicate that these routines are implemented and +may be used, but do not support the process shared option.

Rationale

None. +

Future Directions

None. +

Copyright

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 +. +

Modified by Ross Johnson for use with Pthreads-w32.

Table of Contents

Name +
+
Synopsis +
+
Description +
+
Return + Value +
+
Errors +
+
Examples +
+
Application + Usage +
+
Rationale +
+
Future + Directions +
+
See + Also +
+
Copyright +
+

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