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
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