Ptex: PtexMutex.h Source File

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PtexMutex.h
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1 #ifndef PtexMutex_h
2 #define PtexMutex_h
3
4 /*
5 PTEX SOFTWARE
6 Copyright 2009 Disney Enterprises, Inc. All rights reserved
7
8 Redistribution and use in source and binary forms, with or without
9 modification, are permitted provided that the following conditions are
10 met:
11
12 * Redistributions of source code must retain the above copyright
13 notice, this list of conditions and the following disclaimer.
14
15 * Redistributions in binary form must reproduce the above copyright
16 notice, this list of conditions and the following disclaimer in
17 the documentation and/or other materials provided with the
18 distribution.
19
20 * The names "Disney", "Walt Disney Pictures", "Walt Disney Animation
21 Studios" or the names of its contributors may NOT be used to
22 endorse or promote products derived from this software without
23 specific prior written permission from Walt Disney Pictures.
24
25 Disclaimer: THIS SOFTWARE IS PROVIDED BY WALT DISNEY PICTURES AND
26 CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
27 BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
28 FOR A PARTICULAR PURPOSE, NONINFRINGEMENT AND TITLE ARE DISCLAIMED.
29 IN NO EVENT SHALL WALT DISNEY PICTURES, THE COPYRIGHT HOLDER OR
30 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
31 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
32 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
33 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND BASED ON ANY
34 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
35 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
36 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
37 */
38
39 // #define DEBUG_THREADING
40
42 namespace PtexInternal {
43 #ifndef NDEBUG
44 template <class T>
45 class DebugLock : public T {
46 public:
47 DebugLock() : _locked(0) {}
48 void lock() { T::lock(); _locked = 1; }
49 void unlock() { assert(_locked); _locked = 0; T::unlock(); }
50 bool locked() { return _locked != 0; }
51 private:
52 int _locked;
53 };
54 #endif
55
57 template <class T>
58 class AutoLock {
59 public:
60 AutoLock(T& m) : _m(m) { _m.lock(); }
61 ~AutoLock() { _m.unlock(); }
62 private:
63 T& _m;
64 };
65
66 #ifndef NDEBUG
67 // add debug wrappers to mutex and spinlock
68 typedef DebugLock<_Mutex> Mutex;
69 typedef DebugLock<_SpinLock> SpinLock;
70 #else
71 typedef _Mutex Mutex;
72 typedef _SpinLock SpinLock;
73 #endif
74
75 typedef AutoLock<Mutex> AutoMutex;
76 typedef AutoLock<SpinLock> AutoSpin;
77 }
78
79 #endif
PtexInternal::Mutex
_Mutex Mutex
Definition: PtexMutex.h:71
PtexInternal::AutoLock::~AutoLock
~AutoLock()
Definition: PtexMutex.h:61
PtexInternal::_Mutex
Definition: PtexPlatform.h:120
PtexInternal::SpinLock
_SpinLock SpinLock
Definition: PtexMutex.h:72
PtexInternal::AutoLock::_m
T & _m
Definition: PtexMutex.h:63
PtexInternal::AutoLock::AutoLock
AutoLock(T &m)
Definition: PtexMutex.h:60
PtexInternal::AutoMutex
AutoLock< Mutex > AutoMutex
Definition: PtexMutex.h:75
PtexInternal::AutoSpin
AutoLock< SpinLock > AutoSpin
Definition: PtexMutex.h:76
PtexInternal
For internal use only.
Definition: PtexCache.h:48
PtexInternal::_SpinLock
Definition: PtexPlatform.h:141
PtexInternal::AutoLock
Automatically acquire and release lock within enclosing scope.
Definition: PtexMutex.h:58