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35 .Nd suspend the calling thread
41 .Fn thr_suspend "struct timespec *timeout"
44 This function is intended for implementing threading.
45 Normal applications should use
46 .Xr pthread_cond_timedwait 3
48 .Xr pthread_cond_broadcast 3
49 for typical safe suspension with cooperation of the thread
51 .Xr pthread_suspend_np 3
53 .Xr pthread_resume_np 3
54 in some specific situations, instead.
59 system call puts the calling thread in a suspended state, where it is
60 not eligible for CPU time.
61 This state is exited by another thread calling
63 when the time interval specified by
66 or by the delivery of a signal to the suspended thread.
72 the suspended state can be only terminated by explicit
78 was delivered before the
80 call, the thread is not put into a suspended state.
82 returns immediately without an error.
84 If a thread previously called
86 with its own thread identifier, which resulted in setting the internal kernel
87 flag to immediately abort interruptible sleeps with an
97 called from another thread, the next
99 call does not result in suspension.
105 operation returns the following errors:
108 The memory pointed to by the
110 argument is not valid.
112 The specified timeout expired.
116 argument specified a zero time interval.
118 The sleep was interrupted by a signal.
123 .Xr pthread_resume_np 3 ,
124 .Xr pthread_suspend_np 3
128 system call is non-standard.
132 system call first appeared in