pthread_self - obtain ID of the calling thread
Compile and link with -pthread.
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.
This function always succeeds, returning the calling thread's ID.
This function always succeeds.
For an explanation of the terms used in this section, see attributes(7).
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
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).
This page is part of release 5.13 of the Linux man-pages project. A
description of the project, information about reporting bugs, and the latest
version of this page, can be found at https://www.kernel.org/doc/man-pages/.