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33 .Nd suspend the calling thread
39 .Fn thr_suspend "struct timespec *timeout"
42 This function is intended for implementing threading.
43 Normal applications should use
44 .Xr pthread_cond_timedwait 3
46 .Xr pthread_cond_broadcast 3
47 for typical safe suspension with cooperation of the thread
49 .Xr pthread_suspend_np 3
51 .Xr pthread_resume_np 3
52 in some specific situations, instead.
57 system call puts the calling thread in a suspended state, where it is
58 not eligible for CPU time.
59 This state is exited by another thread calling
61 when the time interval specified by
64 or by the delivery of a signal to the suspended thread.
70 the suspended state can be only terminated by explicit
76 was delivered before the
78 call, the thread is not put into a suspended state.
80 returns immediately without an error.
82 If a thread previously called
84 with its own thread identifier, which resulted in setting the internal kernel
85 flag to immediately abort interruptible sleeps with an
95 called from another thread, the next
97 call does not result in suspension.
103 operation returns the following errors:
106 The memory pointed to by the
108 argument is not valid.
110 The specified timeout expired.
114 argument specified a zero time interval.
116 The sleep was interrupted by a signal.
121 .Xr pthread_resume_np 3 ,
122 .Xr pthread_suspend_np 3
126 system call is non-standard.
130 system call first appeared in