PTHREAD_EQUAL(P) POSIX Programmer's Manual PTHREAD_EQUAL(P)
This manual page is part of the POSIX Programmer's Manual. The Linux
implementation of this interface may differ (consult the corresponding
Linux manual page for details of Linux behavior), or the interface may
not be implemented on Linux.
pthread_equal - compare thread IDs
int pthread_equal(pthread_t t1, pthread_t t2);
This function shall compare the thread IDs t1 and t2.
The pthread_equal() function shall return a non-zero value if t1 and t2
are equal; otherwise, zero shall be returned.
If either t1 or t2 are not valid thread IDs, the behavior is undefined.
No errors are defined.
The pthread_equal() function shall not return an error code of [EINTR].
The following sections are informative.
Implementations may choose to define a thread ID as a structure. This
allows additional flexibility and robustness over using an int. For
example, a thread ID could include a sequence number that allows detec-
tion of "dangling IDs" (copies of a thread ID that has been detached).
Since the C language does not support comparison on structure types,
the pthread_equal() function is provided to compare thread IDs.
pthread_create() , pthread_self() , the Base Definitions volume of
IEEE Std 1003.1-2001, <pthread.h>
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. In the
event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online
at http://www.opengroup.org/unix/online.html .
IEEE/The Open Group 2003 PTHREAD_EQUAL(P)