pthread_self - obtain ID of the calling thread

       For an explanation of the terms used in this section, see attributes(7).
       ┌─────────────────────────────────────────────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                                                                   │ Attribute     │ Value   │
       ├─────────────────────────────────────────────────────────────────────────────┼───────────────┼─────────┤
       │ pthread_self()                                                              │ Thread safety │ MT-Safe │
       └─────────────────────────────────────────────────────────────────────────────┴───────────────┴─────────┘

       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.

       POSIX.1-2001.

       POSIX threads library (libpthread, -lpthread)

       pthread_self - obtain ID of the calling thread

       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).

       This function always succeeds, returning the calling thread's ID.

pthread_create(3), pthread_equal(3), pthreads(7)

Linux man-pages 6.9.1                              2024-05-02                                    pthread_self(3)

       POSIX.1-2008.

#include<pthread.h>pthread_tpthread_self(void);