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
If either t1 or t2 are not valid thread IDs, the behavior
No errors are defined.
The pthread_equal() function shall not return an error code
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 detection 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