Technical Reference: Base Operating System and Extensions, Volume 1

pthread_signal_to_cancel_np Subroutine

Syntax

#include <pthread.h>

int pthread_signal_to_cancel_np ( sigset, thread) sigset_t *sigset; pthread_t *target;

The pthread_signal_to_cancel_np subroutine cancels the target thread thread by creating a handler thread. The handler thread calls the sigwait subroutine with the sigset parameter, and cancels the target thread when the sigwait subroutine returns. Successive call to this subroutine override the previous one.

Notes:

The pthread.h header file must be the first included file of each source file using the threads library. Otherwise, the -D_THREAD_SAFE compilation flag should be used, or the cc_r compiler used. In this case, the flag is automatically set.
The pthread_signal_to_cancel_np subroutine is not portable.

Parameters

sigset	Specifies the set of signals to wait on.
thread	Specifies the thread to cancel.

Return Values

Upon successful completion, 0 is returned. Otherwise, an error code is returned.

Error Codes

The pthread_signal_to_cancel_np subroutine is unsuccessful if the following is true:

EAGAIN	The handler thread cannot be created.
EINVAL	The sigset or thread parameters are not valid.

Implementation Specifics

This subroutine is part of the Base Operating System (BOS) Runtime.

This subroutine is not POSIX compliant and is provided only for compatibility with DCE threads. It should not be used when writing new applications.

Related Information

The pthread_cancel (pthread_cancel Subroutine) subroutine, sigwait subroutine.