pthread_exit(3)
NAME
pthread_exit - terminate calling thread
SYNOPSIS
#include <pthread.h> void pthread_exit(void *retval); Compile and link with -pthread.
DESCRIPTION
The pthread_exit() function terminates the calling thread and returns a value via retval that (if the thread is joinable) is available to another thread in the same process that calls pthread_join(3).
Any clean-up handlers established by pthread_cleanup_push(3) that have
not yet been popped, are popped (in the reverse of the order in which
they were pushed) and executed. If the thread has any thread-specific
data, then, after the clean-up handlers have been executed, the corresponding destructor functions are called, in an unspecified order.
When a thread terminates, process-shared resources (e.g., mutexes, condition variables, semaphores, and file descriptors) are not released,
and functions registered using atexit(3) are not called.
After the last thread in a process terminates, the process terminates
as by calling exit(3) with an exit status of zero; thus, process-shared
resources are released and functions registered using atexit(3) are
called.
RETURN VALUE
This function does not return to the caller.
ERRORS
This function always succeeds.
CONFORMING TO
POSIX.1-2001.
NOTES
Performing a return from the start function of any thread other than
the main thread results in an implicit call to pthread_exit(), using
the function's return value as the thread's exit status.
To allow other threads to continue execution, the main thread should terminate by calling pthread_exit() rather than exit(3).
The value pointed to by retval should not be located on the calling
thread's stack, since the contents of that stack are undefined after
the thread terminates.
BUGS
Currently, there are limitations in the kernel implementation logic for
wait(2)ing on a stopped thread group with a dead thread group leader.
This can manifest in problems such as a locked terminal if a stop signal is sent to a foreground process whose thread group leader has
already called pthread_exit(3).
SEE ALSO
pthread_create(3), pthread_join(3), pthreads(7)
COLOPHON
- This page is part of release 3.25 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.