pthread_cleanup_push man page on SmartOS

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PTHREAD_CLEANUP_PUSH(3C)			      PTHREAD_CLEANUP_PUSH(3C)

NAME
       pthread_cleanup_push - push a thread cancellation cleanup handler

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

       void pthread_cleanup_push(void (*handler) (void *), void *arg);

DESCRIPTION
       The  pthread_cleanup_push()  function pushes the specified cancellation
       cleanup handler routine, handler, onto the cancellation	cleanup	 stack
       of the calling thread.

       When  a thread exits or is canceled and its cancellation cleanup	 stack
       is not empty, the cleanup handlers are invoked with the	argument   arg
       in   last  in,  first  out  (LIFO)  order from the cancellation cleanup
       stack.

       An exiting or cancelled thread  runs  with  all	signals	 blocked.  All
       thread  termination functions, including cancellation cleanup handlers,
       are called with all signals blocked.

       The pthread_cleanup_push() and pthread_cleanup_pop(3C) functions can be
       implemented  as macros. The application must ensure that they appear as
       statements, and in pairs within the same lexical scope  (that  is,  the
       pthread_cleanup_push()  macro  can be thought to expand to a token list
       whose first token is '{'	 with  pthread_cleanup_pop()  expanding	 to  a
       token list whose last token is the corresponding '}').

       The  effect  of	the use of return, break, continue, and goto to prema‐
       turely leave a code block described by a pair of pthread_cleanup_push()
       and pthread_cleanup_pop() function calls is undefined.

       Using  longjmp() or siglongjmp() to jump into or out of a push/pop pair
       can cause either the matching push or the matching  pop	statement  not
       getting executed.

RETURN VALUES
       The pthread_cleanup_push() function returns no value.

ERRORS
       No errors are defined.

       The   pthread_cleanup_push()  function will not return an error code of
       EINTR.

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

       ┌────────────────────┬───────────────────┐
       │  ATTRIBUTE TYPE    │  ATTRIBUTE VALUE	│
       ├────────────────────┼───────────────────┤
       │Interface Stability │ Committed		│
       ├────────────────────┼───────────────────┤
       │MT-Level	    │ MT-Safe		│
       ├────────────────────┼───────────────────┤
       │Standard	    │ See standards(5). │
       └────────────────────┴───────────────────┘

SEE ALSO
       longjmp(3C),	   pthread_cancel(3C),	      pthread_cleanup_pop(3C),
       pthread_exit(3C),     pthread_join(3C),	   pthread_setcancelstate(3C),
       pthread_setcanceltype(3C), pthread_testcancel(3C), attributes(5),  can‐
       cellation(5), condition(5), standards(5)

NOTES
       See cancellation(5) for a discussion of cancellation concepts.

				  Nov 2, 2007	      PTHREAD_CLEANUP_PUSH(3C)
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