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pthread_setasynccancel(3thr)			  pthread_setasynccancel(3thr)

Name
       pthread_setasynccancel - Enables or disables the current thread's asyn‐
       chronous cancelability.

Syntax
       #include <pthread.h>

       int pthread_setasynccancel (state)
       int state;

Arguments
       state   State of asynchronous cancelability  to	set  for  the  calling
	       thread.	Valid values are as follows:

	       Value	    Description
	       CANCEL_ON    Asynchronous cancelability
			    is enabled.

	       CANCEL_OFF   Asynchronous cancelability
			    is disabled.

Description
       This routine enables or disables the current thread's asynchronous can‐
       celability and returns the previous cancelability state.

       When general cancelability is set to CANCEL_OFF,	 a  cancel  cannot  be
       delivered  to  the  thread,  even  if a cancelable routine is called or
       asynchronous cancelability is enabled. When  general  cancelability  is
       set  to	CANCEL_ON,  cancelability depends on the state of the thread's
       asynchronous cancelability.  When general cancelability is set to  CAN‐
       CEL_ON  and asynchronous cancelability is set to CANCEL_OFF, the thread
       can only receive a cancel at specific cancelation points (for  example,
       condition waits, thread joins and calls to pthread_testcancel.) If both
       general cancelability and asynchronous cancelability are	 set  to  CAN‐
       CEL_ON, the thread can be canceled at any point in its execution.

       When  a thread is created, the default asynchronous cancelability state
       is CANCEL_OFF.

       If you call this routine to enable asynchronous cancels, call it	 in  a
       region of code where asynchronous delivery of cancels has been disabled
       by a previous call to this routine.  Threads  routines  should  not  be
       called  in  regions  of	code where asynchronous delivery of cancels is
       enabled.	 The previous state of asynchronous delivery can  be  restored
       later by another call to this routine.

Return Values
       On  successful  completion,  this routine returns the previous state of
       asynchronous cancelability.

       If an error condition occurs, this routine returns -1 and sets errno to
       the corresponding error value.  Possible return values are as follows.

       Return	Error	   Description
       0		   Successful  comple‐
			   tion.

       -1	[EINVAL]   The specified state
			   is not CANCEL_ON or
			   CANCEL_OFF.

						  pthread_setasynccancel(3thr)

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