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, 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

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