pthread_self - obtain ID of the calling thread
POSIX threads library (
libpthread,
-lpthread)
#include <pthread.h>
pthread_t pthread_self(void);
The
pthread_self() function returns the ID of the calling thread. This is
the same value that is returned in
*thread in the
pthread_create(3) call that created this thread.
This function always succeeds, returning the calling thread's ID.
This function always succeeds.
For an explanation of the terms used in this section, see
attributes(7).
Interface |
Attribute |
Value |
pthread_self () |
Thread safety |
MT-Safe |
POSIX.1-2001, POSIX.1-2008.
POSIX.1 allows an implementation wide freedom in choosing the type used to
represent a thread ID; for example, representation using either an arithmetic
type or a structure is permitted. Therefore, variables of type
pthread_t can't portably be compared using the C equality operator (
==); use
pthread_equal(3) instead.
Thread identifiers should be considered opaque: any attempt to use a thread ID
other than in pthreads calls is nonportable and can lead to unspecified
results.
Thread IDs are guaranteed to be unique only within a process. A thread ID may be
reused after a terminated thread has been joined, or a detached thread has
terminated.
The thread ID returned by
pthread_self() is not the same thing as the
kernel thread ID returned by a call to
gettid(2).
pthread_create(3),
pthread_equal(3),
pthreads(7)