opendarwin man page for thr_exit

thr_exit(3C)						   Standard C Library Functions 					      thr_exit(3C)

NAME
       thr_exit - terminate the calling thread

SYNOPSIS
       cc -mt [ flag... ] file...[ library... ]
       #include <thread.h>

       void thr_exit(void *status);

DESCRIPTION
       The thr_exit() function terminates the calling thread, in a similar way that exit(3C) terminates the calling process. If the calling thread
       is not detached, then the thread's ID and the exit status specified by status are retained. The value status is then made available to  any
       successful  join  with the terminating thread (see thr_join(3C)); otherwise, status is disregarded allowing the thread's ID to be reclaimed
       immediately.

       Any cancellation cleanup handlers that have been pushed and not yet popped are popped in the reverse order that they were pushed  and  then
       executed.  After  all  cancellation cleanup handlers have been executed, if the thread has any thread-specific data, appropriate destructor
       functions will be called in an unspecified order. Thread termination does not release any application visible process  resources,including,
       but  not  limited  to,  mutexes and file descriptors, nor does it perform any process level cleanup actions, including, but not limited to,
       calling any atexit() routines that might exist.

       If any thread, including the  main() thread, calls thr_exit(), only that thread will exit.

       If main() returns or exits (either implicitly or explicitly), or any thread explicitly calls exit(), the entire process will exit.

       The behavior of thr_exit() is undefined if called from a cancellation cleanup handler or destructor function that was invoked as  a  result
       of either an implicit or explicit call to thr_exit().

       After  a  thread has terminated, the result of access to local (auto) variables of the thread is undefined. Thus, references to local vari-
       ables of the exiting thread should not be used for the thr_exit() status parameter value.

       If any thread (except the main() thread) implicitly or explicitly returns, the result is the same as if the thread called thr_exit() and it
       will return the value of status as the exit code.

       The  process  will  terminate  with an exit status of 0 after the last non-daemon thread has terminated (including the main() thread). This
       behavior is the same as if the application had called exit() with a 0 argument at thread termination time.

RETURN VALUES
       The  thr_exit() function cannot return to its caller.

ERRORS
       No errors are defined.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO
       exit(3C), thr_create(3C), thr_join(3C), thr_keycreate(3C), attributes(5), standards(5)

NOTES
       Although only POSIX implements cancellation, cancellation can be used with Solaris threads, due to their interoperability.

       The status argument should not reference any variables local to the calling thread.

SunOS 5.10							    27 Mar 2000 						      thr_exit(3C)