PTHREAD_TESTCANCEL(3P)               SysV               PTHREAD_TESTCANCEL(3P)



NAME
     pthread_testcancel - Creates a cancellation point in the calling thread

SYNOPSIS
     #include <pthread.h>

     void pthread_testcancel (void);

DESCRIPTION
     The pthread_testcancel function creates a cancellation point in the
     calling thread.  A cancellation point is a place where it is permissible
     for the thread to be canceled.  A common place for a cancellation point
     is right before an operation that may block or before or after a long
     critical section.

     If general cancelability is disabled, cancellation points, including
     pthread_testcancel, are ignored.

     Before any cancellation point, you should always set up a cleanup handler
     that will restore invariants if the thread is canceled at that point, if
     necessary.

NOTES
     This interface is based on draft 4 of the IEEE P1003.4a standard, and
     will be changed to conform to the final version.

SEE ALSO
     pthread_cancel(3P)