pthread_self man page


This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

pthread_self — get the calling thread ID


#include <pthread.h>

pthread_t pthread_self(void);


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.


No errors are defined.

The following sections are informative.


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.

See Also

pthread_create(), pthread_equal()

The Base Definitions volume of POSIX.1‐2008, <pthread.h>


2013 IEEE/The Open Group POSIX Programmer's Manual