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3.\" Copyright (c) 1997 Brian Cully <shmit@kublai.com>
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32.Dd $Mdocdate: August 14 2013 $
33.Dt PTHREAD_COND_TIMEDWAIT 3
34.Os
35.Sh NAME
36.Nm pthread_cond_timedwait
37.Nd wait on a condition variable for a specific amount of time
38.Sh SYNOPSIS
39.In pthread.h
40.Ft int
41.Fn pthread_cond_timedwait "pthread_cond_t *cond" "pthread_mutex_t *mutex" "const struct timespec *abstime"
42.Sh DESCRIPTION
43The
44.Fn pthread_cond_timedwait
45function atomically blocks the current thread waiting on the condition
46variable specified by
47.Fa cond ,
48and unblocks the mutex specified by
49.Fa mutex .
50The waiting thread unblocks only after another thread calls
51.Xr pthread_cond_signal 3 ,
52or
53.Xr pthread_cond_broadcast 3
54with the same condition variable, or if the system time reaches the
55time specified in
56.Fa abstime ,
57and the current thread reacquires the lock on
58.Fa mutex .
59.Sh RETURN VALUES
60If successful, the
61.Fn pthread_cond_timedwait
62function will return zero.
63Otherwise an error number will be returned to indicate the error.
64.Sh ERRORS
65.Fn pthread_cond_timedwait
66will fail if:
67.Bl -tag -width Er
68.It Bq Er EINVAL
69The value specified by
70.Fa cond ,
71.Fa mutex
72or
73.Fa abstime
74is invalid.
75.It Bq Er ETIMEDOUT
76The system time has reached or exceeded the time specified in
77.Fa abstime .
78.El
79.Sh SEE ALSO
80.Xr pthread_cond_broadcast 3 ,
81.Xr pthread_cond_destroy 3 ,
82.Xr pthread_cond_init 3 ,
83.Xr pthread_cond_signal 3 ,
84.Xr pthread_cond_wait 3
85.Sh STANDARDS
86.Fn pthread_cond_timedwait
87conforms to
88.St -p1003.1-96 .
89