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26 .Dt PTHREAD_BARRIERATTR 3
29 .Nm pthread_barrierattr_destroy , pthread_barrierattr_getpshared ,
30 .Nm pthread_barrierattr_init , pthread_barrierattr_setpshared
31 .Nd "manipulate a barrier attribute object"
37 .Fn pthread_barrierattr_destroy "pthread_barrierattr_t *attr"
39 .Fo pthread_barrierattr_getpshared
40 .Fa "const pthread_barrierattr_t *restrict attr" "int *restrict pshared"
43 .Fn pthread_barrierattr_init "pthread_barrierattr_t *attr"
45 .Fo pthread_barrierattr_setpshared
46 .Fa "pthread_barrierattr_t *attr" "int pshared"
50 .Fn pthread_barrierattr_init
51 function will initialize
53 with default attributes.
55 .Fn pthread_barrierattr_destroy
58 and release any resources that may have been allocated on its behalf.
61 .Fn pthread_barrierattr_getpshared
62 function will put the value of the process-shared attribute from
64 into the memory area pointed to by
67 .Fn pthread_barrierattr_setpshared
68 function will set the process-shared attribute of
70 to the value specified in
74 may have one of the following values:
75 .Bl -tag -width ".Dv PTHREAD_PROCESS_PRIVATE"
76 .It Dv PTHREAD_PROCESS_PRIVATE
77 The barrier object it is attached to may only be accessed by
78 threads in the same process as the one that created the object.
79 .It Dv PTHREAD_PROCESS_SHARED
80 The barrier object it is attached to may be accessed by
81 threads in processes other than the one that created the object.
84 If successful, all these functions will return zero.
85 Otherwise, an error number will be returned to indicate the error.
87 None of these functions will return
91 .Fn pthread_barrierattr_destroy ,
92 .Fn pthread_barrierattr_getpshared
94 .Fn pthread_barrierattr_setpshared
95 functions may fail if:
98 The value specified by
104 .Fn pthread_barrierattr_init
105 function will fail if:
108 Insufficient memory to initialize the barrier attribute object
113 .Fn pthread_barrierattr_setpshared
114 function will fail if:
117 The value specified in
119 is not one of the allowed values.
122 .Xr pthread_barrier_destroy 3 ,
123 .Xr pthread_barrier_init 3 ,
124 .Xr pthread_barrier_wait 3
127 .Fn pthread_barrierattr_*
128 functions first appeared in
136 Support for process-shared barriers appeared in