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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | ATTRIBUTES | STANDARDS | HISTORY | NOTES | BUGS | SEE ALSO | COLOPHON |
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pthread_exit(3) Library Functions Manual pthread_exit(3)
pthread_exit - terminate calling thread
POSIX threads library (libpthread, -lpthread)
#include <pthread.h>
[[noreturn]] void pthread_exit(void *retval);
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.
This function does not return to the caller.
This function always succeeds.
For an explanation of the terms used in this section, see
attributes(7).
┌──────────────────────────────────────┬───────────────┬─────────┐
│ Interface │ Attribute │ Value │
├──────────────────────────────────────┼───────────────┼─────────┤
│ pthread_exit() │ Thread safety │ MT-Safe │
└──────────────────────────────────────┴───────────────┴─────────┘
POSIX.1-2008.
POSIX.1-2001.
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.
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().
pthread_create(3), pthread_join(3), pthreads(7)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
This page was obtained from the tarball man-pages-6.15.tar.gz
fetched from
⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2025-08-11. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-
to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not
part of the original manual page), send a mail to
[email protected]
Linux man-pages 6.15 2025-05-17 pthread_exit(3)
Pages that refer to this page: PR_SET_PDEATHSIG(2const), pthread_cancel(3), pthread_cleanup_push(3), pthread_create(3), pthread_detach(3), pthread_join(3), pthread_key_create(3), pthread_tryjoin_np(3), proc_pid_cwd(5), proc_pid_exe(5), proc_pid_fd(5), proc_pid_root(5), proc_pid_task(5), pthreads(7)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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