diff options
Diffstat (limited to 'pthreads/src/pthread_mutex_timedlock.c')
| -rw-r--r-- | pthreads/src/pthread_mutex_timedlock.c | 324 |
1 files changed, 0 insertions, 324 deletions
diff --git a/pthreads/src/pthread_mutex_timedlock.c b/pthreads/src/pthread_mutex_timedlock.c deleted file mode 100644 index 1745316..0000000 --- a/pthreads/src/pthread_mutex_timedlock.c +++ /dev/null @@ -1,324 +0,0 @@ -/* - * pthread_mutex_timedlock.c - * - * Description: - * This translation unit implements mutual exclusion (mutex) primitives. - * - * -------------------------------------------------------------------------- - * - * Pthreads-win32 - POSIX Threads Library for Win32 - * Copyright(C) 1998 John E. Bossom - * Copyright(C) 1999,2005 Pthreads-win32 contributors - * - * Contact Email: rpj@callisto.canberra.edu.au - * - * The current list of contributors is contained - * in the file CONTRIBUTORS included with the source - * code distribution. The list can also be seen at the - * following World Wide Web location: - * http://sources.redhat.com/pthreads-win32/contributors.html - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library in the file COPYING.LIB; - * if not, write to the Free Software Foundation, Inc., - * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA - */ - -#include "pthread.h" -#include "implement.h" - - -static INLINE int -ptw32_timed_eventwait (HANDLE event, const struct timespec *abstime) - /* - * ------------------------------------------------------ - * DESCRIPTION - * This function waits on an event until signaled or until - * abstime passes. - * If abstime has passed when this routine is called then - * it returns a result to indicate this. - * - * If 'abstime' is a NULL pointer then this function will - * block until it can successfully decrease the value or - * until interrupted by a signal. - * - * This routine is not a cancelation point. - * - * RESULTS - * 0 successfully signaled, - * ETIMEDOUT abstime passed - * EINVAL 'event' is not a valid event, - * - * ------------------------------------------------------ - */ -{ - - DWORD milliseconds; - DWORD status; - - if (event == NULL) - { - return EINVAL; - } - else - { - if (abstime == NULL) - { - milliseconds = INFINITE; - } - else - { - /* - * Calculate timeout as milliseconds from current system time. - */ - milliseconds = ptw32_relmillisecs (abstime); - } - - status = WaitForSingleObject (event, milliseconds); - - if (status == WAIT_OBJECT_0) - { - return 0; - } - else if (status == WAIT_TIMEOUT) - { - return ETIMEDOUT; - } - else - { - return EINVAL; - } - } - - return 0; - -} /* ptw32_timed_semwait */ - - -int -pthread_mutex_timedlock (pthread_mutex_t * mutex, - const struct timespec *abstime) -{ - pthread_mutex_t mx; - int kind; - int result = 0; - - /* - * Let the system deal with invalid pointers. - */ - - /* - * We do a quick check to see if we need to do more work - * to initialise a static mutex. We check - * again inside the guarded section of ptw32_mutex_check_need_init() - * to avoid race conditions. - */ - if (*mutex >= PTHREAD_ERRORCHECK_MUTEX_INITIALIZER) - { - if ((result = ptw32_mutex_check_need_init (mutex)) != 0) - { - return (result); - } - } - - mx = *mutex; - kind = mx->kind; - - if (kind >= 0) - { - if (mx->kind == PTHREAD_MUTEX_NORMAL) - { - if ((PTW32_INTERLOCKED_LONG) PTW32_INTERLOCKED_EXCHANGE_LONG( - (PTW32_INTERLOCKED_LONGPTR) &mx->lock_idx, - (PTW32_INTERLOCKED_LONG) 1) != 0) - { - while ((PTW32_INTERLOCKED_LONG) PTW32_INTERLOCKED_EXCHANGE_LONG( - (PTW32_INTERLOCKED_LONGPTR) &mx->lock_idx, - (PTW32_INTERLOCKED_LONG) -1) != 0) - { - if (0 != (result = ptw32_timed_eventwait (mx->event, abstime))) - { - return result; - } - } - } - } - else - { - pthread_t self = pthread_self(); - - if ((PTW32_INTERLOCKED_LONG) PTW32_INTERLOCKED_COMPARE_EXCHANGE_LONG( - (PTW32_INTERLOCKED_LONGPTR) &mx->lock_idx, - (PTW32_INTERLOCKED_LONG) 1, - (PTW32_INTERLOCKED_LONG) 0) == 0) - { - mx->recursive_count = 1; - mx->ownerThread = self; - } - else - { - if (pthread_equal (mx->ownerThread, self)) - { - if (mx->kind == PTHREAD_MUTEX_RECURSIVE) - { - mx->recursive_count++; - } - else - { - return EDEADLK; - } - } - else - { - while ((PTW32_INTERLOCKED_LONG) PTW32_INTERLOCKED_EXCHANGE_LONG( - (PTW32_INTERLOCKED_LONGPTR) &mx->lock_idx, - (PTW32_INTERLOCKED_LONG) -1) != 0) - { - if (0 != (result = ptw32_timed_eventwait (mx->event, abstime))) - { - return result; - } - } - - mx->recursive_count = 1; - mx->ownerThread = self; - } - } - } - } - else - { - /* - * Robust types - * All types record the current owner thread. - * The mutex is added to a per thread list when ownership is acquired. - */ - ptw32_robust_state_t* statePtr = &mx->robustNode->stateInconsistent; - - if ((PTW32_INTERLOCKED_LONG)PTW32_ROBUST_NOTRECOVERABLE == PTW32_INTERLOCKED_EXCHANGE_ADD_LONG( - (PTW32_INTERLOCKED_LONGPTR)statePtr, - (PTW32_INTERLOCKED_LONG)0)) - { - result = ENOTRECOVERABLE; - } - else - { - pthread_t self = pthread_self(); - - kind = -kind - 1; /* Convert to non-robust range */ - - if (PTHREAD_MUTEX_NORMAL == kind) - { - if ((PTW32_INTERLOCKED_LONG) PTW32_INTERLOCKED_EXCHANGE_LONG( - (PTW32_INTERLOCKED_LONGPTR) &mx->lock_idx, - (PTW32_INTERLOCKED_LONG) 1) != 0) - { - while (0 == (result = ptw32_robust_mutex_inherit(mutex)) - && (PTW32_INTERLOCKED_LONG) PTW32_INTERLOCKED_EXCHANGE_LONG( - (PTW32_INTERLOCKED_LONGPTR) &mx->lock_idx, - (PTW32_INTERLOCKED_LONG) -1) != 0) - { - if (0 != (result = ptw32_timed_eventwait (mx->event, abstime))) - { - return result; - } - if ((PTW32_INTERLOCKED_LONG)PTW32_ROBUST_NOTRECOVERABLE == - PTW32_INTERLOCKED_EXCHANGE_ADD_LONG( - (PTW32_INTERLOCKED_LONGPTR)statePtr, - (PTW32_INTERLOCKED_LONG)0)) - { - /* Unblock the next thread */ - SetEvent(mx->event); - result = ENOTRECOVERABLE; - break; - } - } - - if (0 == result || EOWNERDEAD == result) - { - /* - * Add mutex to the per-thread robust mutex currently-held list. - * If the thread terminates, all mutexes in this list will be unlocked. - */ - ptw32_robust_mutex_add(mutex, self); - } - } - } - else - { - pthread_t self = pthread_self(); - - if (0 == (PTW32_INTERLOCKED_LONG) PTW32_INTERLOCKED_COMPARE_EXCHANGE_LONG( - (PTW32_INTERLOCKED_LONGPTR) &mx->lock_idx, - (PTW32_INTERLOCKED_LONG) 1, - (PTW32_INTERLOCKED_LONG) 0)) - { - mx->recursive_count = 1; - /* - * Add mutex to the per-thread robust mutex currently-held list. - * If the thread terminates, all mutexes in this list will be unlocked. - */ - ptw32_robust_mutex_add(mutex, self); - } - else - { - if (pthread_equal (mx->ownerThread, self)) - { - if (PTHREAD_MUTEX_RECURSIVE == kind) - { - mx->recursive_count++; - } - else - { - return EDEADLK; - } - } - else - { - while (0 == (result = ptw32_robust_mutex_inherit(mutex)) - && (PTW32_INTERLOCKED_LONG) PTW32_INTERLOCKED_EXCHANGE_LONG( - (PTW32_INTERLOCKED_LONGPTR) &mx->lock_idx, - (PTW32_INTERLOCKED_LONG) -1) != 0) - { - if (0 != (result = ptw32_timed_eventwait (mx->event, abstime))) - { - return result; - } - } - - if ((PTW32_INTERLOCKED_LONG)PTW32_ROBUST_NOTRECOVERABLE == - PTW32_INTERLOCKED_EXCHANGE_ADD_LONG( - (PTW32_INTERLOCKED_LONGPTR)statePtr, - (PTW32_INTERLOCKED_LONG)0)) - { - /* Unblock the next thread */ - SetEvent(mx->event); - result = ENOTRECOVERABLE; - } - else if (0 == result || EOWNERDEAD == result) - { - mx->recursive_count = 1; - /* - * Add mutex to the per-thread robust mutex currently-held list. - * If the thread terminates, all mutexes in this list will be unlocked. - */ - ptw32_robust_mutex_add(mutex, self); - } - } - } - } - } - } - - return result; -} |