1PTHREAD_CONDATTR_GETPSHARED(P3OPS)IX Programmer's MaPnTuHaRlEAD_CONDATTR_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_condattr_getpshared, pthread_condattr_setpshared - get and set
13 the process-shared condition variable attributes
14
16 #include <pthread.h>
17 int pthread_condattr_getpshared(const pthread_condattr_t *restrict
19 attr,
20 int *restrict pshared);
21 int pthread_condattr_setpshared(pthread_condattr_t *attr,
22 int pshared);
23
26 The pthread_condattr_getpshared() function shall obtain the value of
27 the process-shared attribute from the attributes object referenced by
28 attr. The pthread_condattr_setpshared() function shall set the process-
29 shared attribute in an initialized attributes object referenced by
30 attr.
31 The process-shared attribute is set to PTHREAD_PROCESS_SHARED to permit
33 a condition variable to be operated upon by any thread that has access
34 to the memory where the condition variable is allocated, even if the
35 condition variable is allocated in memory that is shared by multiple
36 processes. If the process-shared attribute is PTHREAD_PROCESS_PRIVATE,
37 the condition variable shall only be operated upon by threads created
38 within the same process as the thread that initialized the condition
39 variable; if threads of differing processes attempt to operate on such
40 a condition variable, the behavior is undefined. The default value of
41 the attribute is PTHREAD_PROCESS_PRIVATE.
42
44 If successful, the pthread_condattr_setpshared() function shall return
45 zero; otherwise, an error number shall be returned to indicate the
46 error.
47 If successful, the pthread_condattr_getpshared() function shall return
49 zero and store the value of the process-shared attribute of attr into
50 the object referenced by the pshared parameter. Otherwise, an error
51 number shall be returned to indicate the error.
52
54 The pthread_condattr_getpshared() and pthread_condattr_setpshared()
55 functions may fail if:
56 EINVAL The value specified by attr is invalid.
58 The pthread_condattr_setpshared() function may fail if:
61 EINVAL The new value specified for the attribute is outside the range
63 of legal values for that attribute.
64 These functions shall not return an error code of [EINTR].
67 The following sections are informative.
69
71 None.
72
74 None.
75
77 None.
78
80 None.
81
83 pthread_create(), pthread_cond_destroy(), pthread_condattr_destroy(),
84 pthread_mutex_destroy(), the Base Definitions volume of
85 IEEE Std 1003.1-2001, <pthread.h>
86
88 Portions of this text are reprinted and reproduced in electronic form
89 from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
90 -- Portable Operating System Interface (POSIX), The Open Group Base
91 Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
92 Electrical and Electronics Engineers, Inc and The Open Group. In the
93 event of any discrepancy between this version and the original IEEE and
94 The Open Group Standard, the original IEEE and The Open Group Standard
95 is the referee document. The original Standard can be obtained online
96 at http://www.opengroup.org/unix/online.html .
97IEEE/The Open Group 2003 PTHREAD_CONDATTR_GETPSHARED(3P)