Section (3) pthread_exit
pthread_exit — terminate calling thread
Compile and link with
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.
For an explanation of the terms used in this section, see attributes(7).
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_zsingle_quotesz_s return value as the thread_zsingle_quotesz_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_zsingle_quotesz_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
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Copyright (c) 2008 Linux Foundation, written by Michael Kerrisk
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