assert_wait_mesg man page on DigitalUNIX

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assert_wait_mesg(9r)					  assert_wait_mesg(9r)

NAME
       assert_wait_mesg	 -  General: Asserts that the current kernel thread is
       about to block (sleep)

SYNOPSIS
       void assert_wait_mesg(
	       vm_offset_t event,
	       boolean_t interruptible,
	       char *message );

ARGUMENTS
       Specifies the event associated with the current kernel thread.	Speci‐
       fies  a Boolean value that indicates how the kernel thread is awakened.
       You can pass one of the following values: The current kernel thread  is
       interruptible.  This  value  means that a signal can awaken the current
       kernel thread.  The current kernel thread is  not  interruptible.  This
       value means that only the specified event can awaken the current kernel
       thread.	Specifies a mnemonic for the type of wait. The ps command uses
       this mnemonic to print out more meaningful messages about a process.

DESCRIPTION
       The  assert_wait_mesgroutine  asserts that the current kernel thread is
       about to block (sleep) until the specified event occurs.	 This  routine
       sets  a	thread wait bit in the pointer to the thread structure associ‐
       ated with the current kernel thread.  This bit signifies that this ker‐
       nel  thread is on the appropriate wait hash queue, waiting for a wakeup
       call.

       To actually block (put  to  sleep)  the	current	 kernel	 thread,  call
       thread_block.

       To   issue   a	wakeup	 call	on   the  specified  event,  call  the
       thread_wakeup_prim or clear_wait routine.

CAUTIONS
       You must not call assert_wait_mesg from	a  device  driver's  interrupt
       handler.	 The  reason for this is that at interrupt context there is no
       process to be put to sleep.

RETURN VALUES
       None

SEE ALSO
       Data Structures: thread(9s)

       Routines: clear_wait(9r), current_thread(9r), thread_block(9r)

       Reference Pages Section 1: ps

							  assert_wait_mesg(9r)
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