pthread_equal Subroutine
Purpose
Compares two thread IDs.
Library
Threads Library (libpthreads.a)
Syntax
#include <pthread.h>
int pthread_equal (thread1, thread2)
pthread_t thread1;
pthread_t thread2;Description
The pthread_equal subroutine compares the thread IDs thread1 and thread2. Since the thread IDs are opaque objects, it should not be assumed that they can be compared using the equality operator (==).
Note: 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.
Parameters
| Item | Description |
|---|---|
| thread1 | Specifies the first ID to be compared. |
| thread2 | Specifies the second ID to be compared. |
Return Values
The pthread_equal function returns a nonzero value if thread1 and thread2 are equal; otherwise, zero is returned.
If either thread1 or thread2 are not valid thread IDs, the behavior is undefined.