завершить вызывающий поток (terminate calling thread)
Имя (Name)
pthread_exit - terminate calling thread
Синопсис (Synopsis)
#include <pthread.h>
noreturn void pthread_exit(void *retval);
Compile and link with -pthread.
Описание (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.
Возвращаемое значение (Return value)
This function does not return to the caller.
Ошибки (Error)
This function always succeeds.
Атрибуты (Attributes)
For an explanation of the terms used in this section, see
attributes(7).
┌──────────────────────────────────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├──────────────────────────────────────┼───────────────┼─────────┤
│pthread_exit() │ Thread safety │ MT-Safe │
└──────────────────────────────────────┴───────────────┴─────────┘
Стандарты (Conforming to)
POSIX.1-2001, POSIX.1-2008.
Примечание (Note)
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.
Ошибки (баги) (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().
Смотри также (See also)
pthread_create(3), pthread_join(3), pthreads(7)
