src/apps/cortex/support/SimpleLockable.h

   1 /*
   2  * Copyright (c) 1999-2000, Eric Moon.
   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
   7  * are met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions, and the following disclaimer.
  11  *
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions, and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * 3. The name of the author may not be used to endorse or promote products
  17  *    derived from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR
  20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  21  * OF TITLE, NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  23  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  24  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  25  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  26  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  27  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31
  32 // SimpleLockable.h
  33 // * PURPOSE
  34 //   Basic BLocker implementation of ILockable.
  35 //
  36 // * HISTORY
  37 //   e.moon             7jul99          Cortex rework.
  38 //   e.moon             13apr99         Begun (beDub)
  39
  40 #ifndef __SimpleLockable_H__
  41 #define __SimpleLockable_H__
  42
  43 #include "ILockable.h"
  44 #include <Locker.h>
  45
  46 #include "cortex_defs.h"
  47 __BEGIN_CORTEX_NAMESPACE
  48
  49 class SimpleLockable :
  50         public ILockable {
  51
  52 public:                                         // *** ctor
  53         virtual ~SimpleLockable() {}
  54         SimpleLockable() {}
  55         SimpleLockable(const char* name) : m_lock(name) {}
  56
  57 public:                                         // *** ILockable impl.
  58         virtual bool lock(
  59                 lock_t type=WRITE,
  60                 bigtime_t timeout=B_INFINITE_TIMEOUT) {
  61
  62                 return m_lock.LockWithTimeout(timeout) == B_OK;
  63         }
  64
  65         virtual bool unlock(
  66                 lock_t type=WRITE) {
  67                 m_lock.Unlock();
  68                 return true;
  69         }
  70
  71         virtual bool isLocked(
  72                 lock_t type=WRITE) const {
  73                 return m_lock.IsLocked();
  74         }
  75
  76 protected:                                      // members
  77         mutable BLocker         m_lock;
  78 };
  79
  80 __END_CORTEX_NAMESPACE
  81 #endif /*__SimpleLockable_H__*/