SeExpr

Mutex.h
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1 /*
2 Copyright Disney Enterprises, Inc. All rights reserved.
3
4 Licensed under the Apache License, Version 2.0 (the "License");
5 you may not use this file except in compliance with the License
6 and the following modification to it: Section 6 Trademarks.
7 deleted and replaced with:
8
9 6. Trademarks. This License does not grant permission to use the
10 trade names, trademarks, service marks, or product names of the
11 Licensor and its affiliates, except as required for reproducing
12 the content of the NOTICE file.
13
14 You may obtain a copy of the License at
15 http://www.apache.org/licenses/LICENSE-2.0
16 */
17 #ifndef Mutex_h
18 #define Mutex_h
19
20 // #define DEBUG_THREADING
21
22 #include "Platform.h"
23
25 namespace SeExprInternal2 {
26 #ifndef NDEBUG
27 template <class T>
28 class DebugLock : public T {
29 public:
30 DebugLock() : _locked(0) {}
31 void lock() {
32 T::lock();
33 _locked = 1;
34 }
35 void unlock() {
36 assert(_locked);
37 _locked = 0;
38 T::unlock();
39 }
40 bool locked() { return _locked != 0; }
41
42 private:
43 int _locked;
44 };
45 #endif
46
48 template <class T>
49 class AutoLock {
50 public:
51 AutoLock(T& m) : _m(m) { _m.lock(); }
52 ~AutoLock() { _m.unlock(); }
53
54 private:
55 T& _m;
56 };
57
58 #ifndef NDEBUG
59 // add debug wrappers to mutex and spinlock
60 typedef DebugLock<_Mutex> Mutex;
61 typedef DebugLock<_SpinLock> SpinLock;
62 #else
63 typedef _Mutex Mutex;
64 typedef _SpinLock SpinLock;
65 #endif
66
67 typedef AutoLock<Mutex> AutoMutex;
68 typedef AutoLock<SpinLock> AutoSpin;
69 }
70
71 #endif
SeExprInternal2::DebugLock::unlock
void unlock()
Definition: Mutex.h:35
SeExprInternal2::Mutex
DebugLock< _Mutex > Mutex
Definition: Mutex.h:60
Platform.h
Platform-specific classes, functions, and includes.
SeExprInternal2::SpinLock
DebugLock< _SpinLock > SpinLock
Definition: Mutex.h:61
SeExprInternal2::AutoLock::~AutoLock
~AutoLock()
Definition: Mutex.h:52
SeExprInternal2::AutoLock::AutoLock
AutoLock(T &m)
Definition: Mutex.h:51
SeExprInternal2::AutoMutex
AutoLock< Mutex > AutoMutex
Definition: Mutex.h:67
SeExprInternal2::DebugLock::_locked
int _locked
Definition: Mutex.h:43
SeExprInternal2::_SpinLock
Definition: Platform.h:218
SeExprInternal2::AutoLock
Definition: Mutex.h:49
SeExprInternal2::AutoLock::_m
T & _m
Definition: Mutex.h:55
SeExprInternal2::_Mutex
Definition: Platform.h:195
SeExprInternal2::DebugLock
Definition: Mutex.h:28
SeExprInternal2::DebugLock::locked
bool locked()
Definition: Mutex.h:40
SeExprInternal2
Definition: Mutex.h:25
SeExprInternal2::AutoSpin
AutoLock< SpinLock > AutoSpin
Definition: Mutex.h:68
SeExprInternal2::DebugLock::DebugLock
DebugLock()
Definition: Mutex.h:30
SeExprInternal2::DebugLock::lock
void lock()
Definition: Mutex.h:31