pthread_setcancelstate(3T)												pthread_setcancelstate(3T)

NAME

       pthread_setcancelstate(), pthread_setcanceltype() - set and retrieve current thread's cancelability state or type.

SYNOPSIS

PARAMETERS

	      state	Value to which the cancelability state of the calling thread is to be set.

	      oldstate	Pointer to the location where the old cancelability state of the calling thread will be returned.

	      type	Value to which the cancelability type of the calling thread is to be set.

	      oldtype	Pointer to the location where the old cancelability type of the calling thread will be returned.

DESCRIPTION

       atomically  sets  the  calling thread's cancelability state to the value in state and returns the previous cancelability state in oldstate.
       The legal values for state are:

	      Disable cancelability for the calling thread.
		     Cancellation requests against the calling thread are held pending.

	      Enable cancelability for the calling thread.
		     Cancellation requests against the calling thread may be acted upon.  When a pending cancellation request will be  acted  upon
		     depends on the thread's cancelability type.

       By default, a thread's cancelability state is set to when it is created.

       atomically  sets  the calling thread's cancelability type to the value in type and returns the previous cancelability type in oldtype.  The
       legal values for type are:

	      New or pending cancellation requests against the calling thread may be acted
		     upon at any time (if cancellation is enabled for the calling thread).

	      Cancellation requests for the calling thread are held pending until a
		     cancellation point is reached.

       A thread's cancelability type is set to when it is created.

       If a thread's cancelability state is disabled, the setting of the thread's cancelability type has no  immediate	effect.  All  cancellation
       requests are held pending.  However, once cancelability is enabled again, the new type will be in effect.

RETURN VALUE

       Upon successful completion, and return zero. Otherwise, an error number is returned to indicate the error (the variable is not set).

ERRORS

       For each of the following conditions, if the condition is detected, the and functions return the corresponding error number:

	      [EINVAL]	     state contains an invalid value.

	      [EINVAL]	     type contains an invalid value.

NOTES

       Only functions that are async-cancel safe should be called from a thread that is asynchronously cancelable.

AUTHOR

       and were derived from the IEEE POSIX P1003.1c standard.

SEE ALSO

       pthread_exit(3T), pthread_join(3T), pthread_cancel(3T), pthread_cond_wait(3T), pthread_cond_timedwait(3T).

STANDARDS CONFORMANCE

								  Pthread Library					pthread_setcancelstate(3T)