pthread_exit - terminate calling thread
#include <pthread.h>
void pthread_exit(void *retval);
Compile and link with -pthread.
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.1-2001, POSIX.1-2008.
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)