pthread_testcancel - Requests delivery of a pending cancelation request to the calling thread.
DECthreads POSIX 1003.1c Library (libpthread.so)
Interfaces documented on this reference page conform to industry standards as follows:
IEEE Std 1003.1c-1995, POSIX System Application Program Interface
This routine requests delivery of a pending cancelation request to the calling thread. Thus, calling this routine creates a cancelation point within the calling thread.
The cancelation request is delivered only if a request is pending for the calling thread and the calling thread's cancelability state is enabled. (A thread disables delivery of cancelation requests to itself by calling pthread_setcancelstate(3).)
When called within very long loops, this routine ensures that a pending cancelation request is noticed by the calling thread within a reasonable amount of time.
Manuals: Guide to DECthreads and Programmer's Guide