The Open Group Base Specifications Issue 7
IEEE Std 1003.1-2008, 2016 Edition
Copyright © 2001-2016 The IEEE and The Open Group

#### NAME

> pthread_self - get the calling thread ID

#### SYNOPSIS

> ``#include <pthread.h>
> pthread_t pthread_self(void);
> ``

#### DESCRIPTION

> The pthread_self() function shall return the thread ID of the calling thread.

#### RETURN VALUE

> The pthread_self() function shall always be successful and no return value is reserved to indicate an error.

#### ERRORS

> No errors are defined.

The following sections are informative.

#### EXAMPLES

> None.

#### APPLICATION USAGE

> None.

#### RATIONALE

> The pthread_self() function provides a capability similar to the getpid() function for processes and the rationale is the same: the creation call does not provide the thread ID to the created thread.

#### FUTURE DIRECTIONS

> None.

#### SEE ALSO

> pthread_create, pthread_equal

> XBD <pthread.h>

#### CHANGE HISTORY

> First released in Issue 5. Included for alignment with the POSIX Threads Extension.

#### Issue 6

> The pthread_self() function is marked as part of the Threads option.

#### Issue 7

> Austin Group Interpretation 1003.1-2001 #063 is applied, updating the RETURN VALUE section.

> The pthread_self() function is moved from the Threads option to the Base.

End of informative text.

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