pthread_self(3)

1PTHREAD_SELF(3)            Linux Programmer's Manual           PTHREAD_SELF(3)
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NAME

6       pthread_self - obtain ID of the calling thread
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SYNOPSIS

9       #include <pthread.h>
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11       pthread_t pthread_self(void);
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13       Compile and link with -pthread.
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DESCRIPTION

16       The pthread_self() function returns the ID of the calling thread.  This
17       is the same value that is returned in *thread in the  pthread_create(3)
18       call that created this thread.
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RETURN VALUE

21       This function always succeeds, returning the calling thread's ID.
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ERRORS

24       This function always succeeds.
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CONFORMING TO

27       POSIX.1-2001.
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NOTES

30       POSIX.1 allows an implementation wide freedom in choosing the type used
31       to represent a thread ID; for example, representation using  either  an
32       arithmetic  type  or a structure is permitted.  Therefore, variables of
33       type pthread_t can't portably be compared using the C equality operator
34       (==); use pthread_equal(3) instead.
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36       Thread  identifiers  should  be considered opaque: any attempt to use a
37       thread ID other than in pthreads calls is nonportable and can  lead  to
38       unspecified results.
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40       Thread IDs are only guaranteed to be unique within a process.  A thread
41       ID may be reused after a  terminated  thread  has  been  joined,  or  a
42       detached thread has terminated.
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44       The  thread  ID returned by pthread_self() is not the same thing as the
45       kernel thread ID returned by a call to gettid(2).
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COLOPHON

51       This page is part of release 3.25 of the Linux  man-pages  project.   A
52       description  of  the project, and information about reporting bugs, can
53       be found at http://www.kernel.org/doc/man-pages/.
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57Linux                             2008-10-24                   PTHREAD_SELF(3)