diff options
Diffstat (limited to 'nptl/libc-cancellation.c')
-rw-r--r-- | nptl/libc-cancellation.c | 102 |
1 files changed, 3 insertions, 99 deletions
diff --git a/nptl/libc-cancellation.c b/nptl/libc-cancellation.c index cada464d2b..432e1f8b6a 100644 --- a/nptl/libc-cancellation.c +++ b/nptl/libc-cancellation.c @@ -17,106 +17,12 @@ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ -#include <setjmp.h> -#include <stdlib.h> #include "pthreadP.h" -#include <atomic.h> -#include <bits/libc-lock.h> -#ifndef NOT_IN_libc - -/* The next two functions are similar to pthread_setcanceltype() but - more specialized for the use in the cancelable functions like write(). - They do not need to check parameters etc. */ -int -attribute_hidden -__libc_enable_asynccancel (void) -{ - struct pthread *self = THREAD_SELF; - int oldval = THREAD_GETMEM (self, cancelhandling); - - while (1) - { - int newval = oldval | CANCELTYPE_BITMASK; - - if (__builtin_expect ((oldval & CANCELED_BITMASK) != 0, 0)) - { - /* If we are already exiting or if PTHREAD_CANCEL_DISABLED, - stop right here. */ - if ((oldval & (EXITING_BITMASK | CANCELSTATE_BITMASK)) != 0) - break; - - int curval = THREAD_ATOMIC_CMPXCHG_VAL (self, cancelhandling, - newval, oldval); - if (__builtin_expect (curval != oldval, 0)) - { - /* Somebody else modified the word, try again. */ - oldval = curval; - continue; - } - - THREAD_SETMEM (self, result, PTHREAD_CANCELED); - - __do_cancel (); - - /* NOTREACHED */ - } - - int curval = THREAD_ATOMIC_CMPXCHG_VAL (self, cancelhandling, newval, - oldval); - if (__builtin_expect (curval == oldval, 1)) - break; - - /* Prepare the next round. */ - oldval = curval; - } - - return oldval; -} - - -void -internal_function attribute_hidden -__libc_disable_asynccancel (int oldtype) -{ - /* If asynchronous cancellation was enabled before we do not have - anything to do. */ - if (oldtype & CANCELTYPE_BITMASK) - return; - - struct pthread *self = THREAD_SELF; - int newval; - - int oldval = THREAD_GETMEM (self, cancelhandling); - - while (1) - { - newval = oldval & ~CANCELTYPE_BITMASK; - - if (newval == oldval) - break; - - int curval = THREAD_ATOMIC_CMPXCHG_VAL (self, cancelhandling, newval, - oldval); - if (__builtin_expect (curval == oldval, 1)) - break; - - /* Prepare the next round. */ - oldval = curval; - } - - /* We cannot return when we are being canceled. Upon return the - thread might be things which would have to be undone. The - following loop should loop until the cancellation signal is - delivered. */ - while (__builtin_expect ((newval & (CANCELING_BITMASK | CANCELED_BITMASK)) - == CANCELING_BITMASK, 0)) - { - lll_futex_wait (&self->cancelhandling, newval, LLL_PRIVATE); - newval = THREAD_GETMEM (self, cancelhandling); - } -} +#define __pthread_enable_asynccancel __libc_enable_asynccancel +#define __pthread_disable_asynccancel __libc_disable_asynccancel +#include <nptl/cancellation.c> void @@ -125,5 +31,3 @@ __libc_cleanup_routine (struct __pthread_cleanup_frame *f) if (f->__do_it) f->__cancel_routine (f->__cancel_arg); } - -#endif |