Manpages - pthread_self.3

pthread_self - obtain ID of the calling thread

  #include <pthread.h>

  pthread_t pthread_self(void);

  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.1-2001, POSIX.1-2008.

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).

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

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