PTHREAD_SELF(3)                                     Linux Programmer's Manual                                    PTHREAD_SELF(3)



NAME
       pthread_self - obtain ID of the calling thread

SYNOPSIS
       #include <pthread.h>

       pthread_t pthread_self(void);

       Compile and link with -pthread.

DESCRIPTION
       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.

RETURN VALUE
       This function always succeeds, returning the calling thread's ID.

ERRORS
       This function always succeeds.

CONFORMING TO
       POSIX.1-2001.

NOTES
       POSIX.1 allows an implementation wide freedom in choosing the type used to represent a thread ID; for example,  represen-
       tation  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  non-
       portable and can lead to unspecified results.

       Thread  IDs  are  only guaranteed to be unique 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).

SEE ALSO
       pthread_create(3), pthread_equal(3), pthreads(7)

COLOPHON
       This page is part of release 3.25 of the Linux man-pages project.  A description of the project,  and  information  about
       reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.



Linux                                                      2008-10-24                                            PTHREAD_SELF(3)