1 .\" Copyright (c) 2004 Michael Telahun Makonnen
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25 .\" $FreeBSD: src/share/man/man3/pthread_barrierattr.3,v 1.3 2007/10/22 10:08:00 ru Exp $
28 .Dt PTHREAD_BARRIERATTR 3
31 .Nm pthread_barrierattr_destroy , pthread_barrierattr_getpshared ,
32 .Nm pthread_barrierattr_init , pthread_barrierattr_setpshared
33 .Nd "manipulate a barrier attribute object"
39 .Fn pthread_barrierattr_destroy "pthread_barrierattr_t *attr"
41 .Fn pthread_barrierattr_getpshared "const pthread_barrierattr_t *attr" "int *pshared"
43 .Fn pthread_barrierattr_init "pthread_barrierattr_t *attr"
45 .Fn pthread_barrierattr_setpshared "pthread_barrierattr_t *attr" "int pshared"
48 .Fn pthread_barrierattr_init
49 function will initialize
51 with default attributes.
53 .Fn pthread_barrierattr_destroy
56 and release any resources that may have been allocated on its behalf.
59 .Fn pthread_barrierattr_getpshared
60 function will put the value of the process-shared attribute from
62 into the memory area pointed to by
65 .Fn pthread_barrierattr_setpshared
66 function will set the process-shared attribute of
68 to the value specified in
72 may have one of the following values:
73 .Bl -tag -width ".Dv PTHREAD_PROCESS_PRIVATE"
74 .It Dv PTHREAD_PROCESS_PRIVATE
75 The barrier object it is attached to may only be accessed by
76 threads in the same process as the one that created the object.
77 .It Dv PTHREAD_PROCESS_SHARED
78 The barrier object it is attached to may be accessed by
79 threads in processes other than the one that created the object.
82 If successful, all these functions will return zero.
83 Otherwise, an error number will be returned to indicate the error.
85 None of these functions will return
89 .Fn pthread_barrierattr_destroy ,
90 .Fn pthread_barrierattr_getpshared
92 .Fn pthread_barrierattr_setpshared
93 functions may fail if:
96 The value specified by
102 .Fn pthread_barrierattr_init
103 function will fail if:
106 Insufficient memory to initialize the barrier attribute object
111 .Fn pthread_barrierattr_setpshared
112 function will fail if:
115 The value specified in
117 is not one of the allowed values.
120 .Xr pthread_barrier_destroy 3 ,
121 .Xr pthread_barrier_init 3 ,
122 .Xr pthread_barrier_wait 3
124 The implementation of
126 does not fully conform to
128 because the process-shared attribute is ignored;
129 if any value other than
130 .Dv PTHREAD_PROCESS_PRIVATE
131 is specified in a call to
132 .Fn pthread_barrierattr_setpshared ,