1PTHREAD_BARRIERATTR_GETPSHARPEODS(I3XP)Programmer'sPTMHaRnEuAaDl_BARRIERATTR_GETPSHARED(3P)
2
6 This manual page is part of the POSIX Programmer's Manual. The Linux
7 implementation of this interface may differ (consult the corresponding
8 Linux manual page for details of Linux behavior), or the interface may
9 not be implemented on Linux.
10
12 pthread_barrierattr_getpshared, pthread_barrierattr_setpshared - get
13 and set the process-shared attribute of the barrier attributes object
14 (ADVANCED REALTIME THREADS)
15
17 #include <pthread.h>
18 int pthread_barrierattr_getpshared(const pthread_barrierattr_t *
22 restrict attr, int *restrict pshared);
23 int pthread_barrierattr_setpshared(pthread_barrierattr_t *attr,
24 int pshared);
25
28 The pthread_barrierattr_getpshared() function shall obtain the value of
29 the process-shared attribute from the attributes object referenced by
30 attr. The pthread_barrierattr_setpshared() function shall set the
31 process-shared attribute in an initialized attributes object referenced
32 by attr.
33 The process-shared attribute is set to PTHREAD_PROCESS_SHARED to permit
35 a barrier to be operated upon by any thread that has access to the mem‐
36 ory where the barrier is allocated. If the process-shared attribute is
37 PTHREAD_PROCESS_PRIVATE, the barrier shall only be operated upon by
38 threads created within the same process as the thread that initialized
39 the barrier; if threads of different processes attempt to operate on
40 such a barrier, the behavior is undefined. The default value of the
41 attribute shall be PTHREAD_PROCESS_PRIVATE. Both constants
42 PTHREAD_PROCESS_SHARED and PTHREAD_PROCESS_PRIVATE are defined in
43 <pthread.h>.
44 Additional attributes, their default values, and the names of the asso‐
46 ciated functions to get and set those attribute values are implementa‐
47 tion-defined.
48
50 If successful, the pthread_barrierattr_getpshared() function shall
51 return zero and store the value of the process-shared attribute of attr
52 into the object referenced by the pshared parameter. Otherwise, an
53 error number shall be returned to indicate the error.
54 If successful, the pthread_barrierattr_setpshared() function shall
56 return zero; otherwise, an error number shall be returned to indicate
57 the error.
58
60 These functions may fail if:
61 EINVAL The value specified by attr is invalid.
63 The pthread_barrierattr_setpshared() function may fail if:
66 EINVAL The new value specified for the process-shared attribute is not
68 one of the legal values PTHREAD_PROCESS_SHARED or
69 PTHREAD_PROCESS_PRIVATE.
70 These functions shall not return an error code of [EINTR].
73 The following sections are informative.
75
77 None.
78
80 The pthread_barrierattr_getpshared() and pthread_barrierattr_setp‐
81 shared() functions are part of the Barriers option and need not be pro‐
82 vided on all implementations.
83
85 None.
86
88 None.
89
91 pthread_barrier_destroy(), pthread_barrierattr_destroy(), pthread_bar‐
92 rierattr_init(), the Base Definitions volume of IEEE Std 1003.1-2001,
93 <pthread.h>
94
96 Portions of this text are reprinted and reproduced in electronic form
97 from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
98 -- Portable Operating System Interface (POSIX), The Open Group Base
99 Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
100 Electrical and Electronics Engineers, Inc and The Open Group. In the
101 event of any discrepancy between this version and the original IEEE and
102 The Open Group Standard, the original IEEE and The Open Group Standard
103 is the referee document. The original Standard can be obtained online
104 at http://www.opengroup.org/unix/online.html .
105IEEE/The Open Group 2003 PTHREAD_BARRIERATTR_GETPSHARED(3P)