NAME
pthreadexit - terminate calling thread SYNOPSIS
#include
void pthreadexit(void *retval); Compile and link with -pthread. DESCRIPTION The pthreadexit() 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 pthreadjoin(3).
Any clean-up handlers established by pthreadcleanuppush(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 corre‐ sponding destructor functions are called, in an unspecified order.
When a thread terminates, process-shared resources (e.g., mutexes, con‐ dition 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. ATTRIBUTES For an explanation of the terms used in this section, see attributes(7). ┌───────────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├───────────────┼───────────────┼─────────┤
│pthreadexit() │ Thread safety │ MT-Safe │ └───────────────┴───────────────┴─────────┘ 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 pthreadexit(), 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 pthreadexit() 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 sig‐ nal is sent to a foreground process whose thread group leader has already called pthreadexit(). SEE ALSO pthreadcreate(3), pthreadjoin(3), pthreads(7) COLOPHON
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Linux 2009-03-30 PTHREADEXIT(3)