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.

ATTRIBUTES
   Multithreading (see pthreads(7))
       The pthread_self() function is thread-safe.

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, 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).

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

COLOPHON
       This page is part of release 3.74 of the Linux man-pages project.  A  description  of  the
       project,  information  about  reporting  bugs, and the latest version of this page, can be
       found at http://www.kernel.org/doc/man-pages/.



Linux                                       2014-05-13                            PTHREAD_SELF(3)