service_runtime/nacl_interruptible_mutex.h

   1 /*
   2  * Copyright 2008, Google Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met:
   8  *
   9  *     * Redistributions of source code must retain the above copyright
  10  * notice, this list of conditions and the following disclaimer.
  11  *     * Redistributions in binary form must reproduce the above
  12  * copyright notice, this list of conditions and the following disclaimer
  13  * in the documentation and/or other materials provided with the
  14  * distribution.
  15  *     * Neither the name of Google Inc. nor the names of its
  16  * contributors may be used to endorse or promote products derived from
  17  * this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  22  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  23  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  25  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  29  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * NaCl Server Runtime interruptible binary mutex, based on nacl_sync
  34  * interface.
  35  */
  36 #ifndef NATIVE_CLIENT_SERVICE_RUNTIME_NACL_INTERRUPTIBLE_MUTEX_H_
  37 #define NATIVE_CLIENT_SERVICE_RUNTIME_NACL_INTERRUPTIBLE_MUTEX_H_
  38
  39 #include "native_client/include/nacl_base.h"
  40 #include "native_client/service_runtime/nacl_sync.h"
  41
  42 EXTERN_C_BEGIN
  43
  44 enum NaClIntrMutexState {
  45   NACL_INTR_LOCK_FREE,
  46   NACL_INTR_LOCK_HELD,
  47   NACL_INTR_LOCK_INTERRUPTED
  48 };
  49
  50 struct NaClIntrMutex {
  51   /* public */
  52   enum NaClIntrMutexState lock_state;
  53
  54   /* private */
  55   struct NaClMutex    mu;
  56   struct NaClCondVar  cv;
  57 };
  58
  59 int NaClIntrMutexCtor(struct NaClIntrMutex  *mp);
  60 /* bool success/fail */
  61
  62 void NaClIntrMutexDtor(struct NaClIntrMutex *mp);
  63
  64 NaClSyncStatus NaClIntrMutexLock(struct NaClIntrMutex  *mp);
  65
  66 NaClSyncStatus NaClIntrMutexTryLock(struct NaClIntrMutex *mp);
  67
  68 NaClSyncStatus NaClIntrMutexUnlock(struct NaClIntrMutex *mp);
  69
  70 void NaClIntrMutexIntr(struct NaClIntrMutex  *mp);
  71
  72 void NaClIntrMutexReset(struct NaClIntrMutex *mp);
  73
  74 EXTERN_C_END
  75
  76
  77 #endif  /* NATIVE_CLIENT_SERVICE_RUNTIME_NACL_INTERRUPTIBLE_MUTEX_H_ */