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47 .TH PTHREAD_CONDATTR_INIT 3C "Mar 23, 2005"
49 pthread_condattr_init, pthread_condattr_destroy \- initialize or destroy
50 condition variable attributes object
54 cc -mt [ \fIflag\fR... ] \fIfile\fR... -lpthread [ \fIlibrary\fR... ]
57 \fBint\fR \fBpthread_condattr_init\fR(\fBpthread_condattr_t *\fR\fIattr\fR);
62 \fBint\fR \fBpthread_condattr_destroy\fR(\fBpthread_condattr_t *\fR\fIattr\fR);
68 The \fBpthread_condattr_init()\fR function initializes a condition variable
69 attributes object \fIattr\fR with the default value for all of the attributes
70 defined by the implementation.
73 At present, the only attribute available is the scope of condition variables.
74 The default scope of the attribute is \fBPTHREAD_PROCESS_PRIVATE\fR.
77 Attempts to initialize previously initialized condition variable attributes
78 object will leave the storage allocated by the previous initialization
82 After a condition variable attributes object has been used to initialize one or
83 more condition variables, any function affecting the attributes object
84 (including destruction) does not affect any previously initialized condition
88 The \fBpthread_condattr_destroy()\fR function destroys a condition variable
89 attributes object; the object becomes, in effect, uninitialized. An
90 implementation may cause \fBpthread_condattr_destroy()\fR to set the object
91 referenced by \fIattr\fR to an invalid value. A destroyed condition variable
92 attributes object can be re-initialized using \fBpthread_condattr_init()\fR;
93 the results of otherwise referencing the object after it has been destroyed are
97 Additional attributes, their default values, and the names of the associated
98 functions to get and set those attribute values are implementation-dependent.
102 If successful, the \fBpthread_condattr_init()\fR and
103 \fBpthread_condattr_destroy()\fR functions return \fB0\fR. Otherwise, an error
104 number is returned to indicate the error.
108 The \fBpthread_condattr_init()\fR function will fail if:
115 Insufficient memory exists to initialize the condition variable attributes
121 The \fBpthread_condattr_destroy()\fR function may fail if:
128 The value specified by \fIattr\fR is invalid.
134 See \fBattributes\fR(5) for descriptions of the following attributes:
142 ATTRIBUTE TYPE ATTRIBUTE VALUE
144 Interface Stability Standard
152 \fBpthread_condattr_getpshared\fR(3C), \fBpthread_condattr_setpshared\fR(3C),
153 \fBpthread_cond_init\fR(3C), \fBpthread_create\fR(3C),
154 \fBpthread_mutex_init\fR(3C), \fBattributes\fR(5), \fBstandards\fR(5)