mutex.cpp

Engine/source/platformX86UNIX/threads/mutex.cpp
Classes:

class
Detailed Description

 1
 2//-----------------------------------------------------------------------------
 3// Copyright (c) 2012 GarageGames, LLC
 4//
 5// Permission is hereby granted, free of charge, to any person obtaining a copy
 6// of this software and associated documentation files (the "Software"), to
 7// deal in the Software without restriction, including without limitation the
 8// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 9// sell copies of the Software, and to permit persons to whom the Software is
10// furnished to do so, subject to the following conditions:
11//
12// The above copyright notice and this permission notice shall be included in
13// all copies or substantial portions of the Software.
14//
15// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21// IN THE SOFTWARE.
22//-----------------------------------------------------------------------------
23
24#include "console/console.h"
25#include "platformX86UNIX/platformX86UNIX.h"
26#include "platform/threads/mutex.h"
27#include "core/util/safeDelete.h"
28
29#include <pthread.h>
30#include <sys/stat.h>
31#include <unistd.h>
32#include <fcntl.h>
33#include <errno.h>
34
35struct PlatformMutexData
36{
37   pthread_mutex_t mutex;
38};
39
40Mutex::Mutex()
41{
42   mData = new PlatformMutexData;
43   pthread_mutexattr_t attr;
44
45   pthread_mutexattr_init(&attr);
46   pthread_mutexattr_settype(&attr,PTHREAD_MUTEX_RECURSIVE);
47
48   pthread_mutex_init(&mData->mutex, &attr);
49}
50
51Mutex::~Mutex()
52{
53   AssertFatal(mData, "Mutex::destroyMutex: invalid mutex");
54   pthread_mutex_destroy(&mData->mutex);
55   SAFE_DELETE(mData);
56}
57
58bool Mutex::lock(bool block)
59{
60   if(mData == NULL)
61      return false;
62   if(block)
63   {
64      return pthread_mutex_lock(&mData->mutex) == 0;
65   }
66   else
67   {
68      return pthread_mutex_trylock(&mData->mutex) == 0;
69   }
70}
71
72void Mutex::unlock()
73{
74   if(mData == NULL)
75      return;
76   pthread_mutex_unlock(&mData->mutex);
77}
78