|
1
|
|
/*
|
|
2
|
|
RawSpeed - RAW file decoder.
|
|
3
|
|
|
|
4
|
|
Copyright (C) 2017-2018 Roman Lebedev
|
|
5
|
|
|
|
6
|
|
This library is free software; you can redistribute it and/or
|
|
7
|
|
modify it under the terms of the GNU Lesser General Public
|
|
8
|
|
License as published by the Free Software Foundation; either
|
|
9
|
|
version 2 of the License, or (at your option) any later version.
|
|
10
|
|
|
|
11
|
|
This library is distributed in the hope that it will be useful,
|
|
12
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
13
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
14
|
|
Lesser General Public License for more details.
|
|
15
|
|
|
|
16
|
|
You should have received a copy of the GNU Lesser General Public
|
|
17
|
|
License along with this library; if not, write to the Free Software
|
|
18
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
19
|
|
*/
|
|
20
|
|
|
|
21
|
|
#pragma once
|
|
22
|
|
|
|
23
|
|
#include "rawspeedconfig.h"
|
|
24
|
|
#include "ThreadSafetyAnalysis.h"
|
|
25
|
|
|
|
26
|
|
#ifdef HAVE_OPENMP
|
|
27
|
|
#include <omp.h>
|
|
28
|
|
#endif
|
|
29
|
|
|
|
30
|
|
namespace rawspeed {
|
|
31
|
|
|
|
32
|
|
// Defines an annotated interface for mutexes.
|
|
33
|
|
// These methods can be implemented to use any internal mutex implementation.
|
|
34
|
|
#ifdef HAVE_OPENMP
|
|
35
|
|
|
|
36
|
|
class CAPABILITY("mutex") Mutex final {
|
|
37
|
|
omp_lock_t mutex;
|
|
38
|
|
|
|
39
|
|
public:
|
|
40
|
1
|
explicit Mutex() { omp_init_lock(&mutex); }
|
|
41
|
|
|
|
42
|
|
Mutex(const Mutex&) = delete;
|
|
43
|
|
Mutex(Mutex&&) = delete;
|
|
44
|
|
Mutex& operator=(const Mutex&) = delete;
|
|
45
|
|
Mutex& operator=(Mutex&&) = delete;
|
|
46
|
|
|
|
47
|
1
|
~Mutex() { omp_destroy_lock(&mutex); }
|
|
48
|
|
|
|
49
|
|
// Acquire/lock this mutex exclusively. Only one thread can have exclusive
|
|
50
|
|
// access at any one time. Write operations to guarded data require an
|
|
51
|
|
// exclusive lock.
|
|
52
|
1
|
void Lock() ACQUIRE() { omp_set_lock(&mutex); }
|
|
53
|
|
|
|
54
|
|
// Release/unlock an exclusive mutex.
|
|
55
|
1
|
void Unlock() RELEASE() { omp_unset_lock(&mutex); }
|
|
56
|
|
|
|
57
|
|
// Try to acquire the mutex. Returns true on success, and false on failure.
|
|
58
|
|
bool TryLock() TRY_ACQUIRE(true) { return omp_test_lock(&mutex); }
|
|
59
|
|
|
|
60
|
|
// For negative capabilities.
|
|
61
|
|
const Mutex& operator!() const { return *this; }
|
|
62
|
|
};
|
|
63
|
|
|
|
64
|
|
#else
|
|
65
|
|
|
|
66
|
|
class CAPABILITY("mutex") Mutex final {
|
|
67
|
|
public:
|
|
68
|
|
explicit Mutex() = default;
|
|
69
|
|
|
|
70
|
|
Mutex(const Mutex&) = delete;
|
|
71
|
|
Mutex(Mutex&&) = delete;
|
|
72
|
|
Mutex& operator=(const Mutex&) = delete;
|
|
73
|
|
Mutex& operator=(Mutex&&) = delete;
|
|
74
|
|
|
|
75
|
|
~Mutex() = default;
|
|
76
|
|
|
|
77
|
|
// Acquire/lock this mutex exclusively. Only one thread can have exclusive
|
|
78
|
|
// access at any one time. Write operations to guarded data require an
|
|
79
|
|
// exclusive lock.
|
|
80
|
|
void Lock() const ACQUIRE() {
|
|
81
|
|
// NOP, since there is no mutex. only here to still check for proper locking
|
|
82
|
|
}
|
|
83
|
|
|
|
84
|
|
// Release/unlock an exclusive mutex.
|
|
85
|
|
void Unlock() const RELEASE() {
|
|
86
|
|
// NOP, since there is no mutex. only here to still check for proper locking
|
|
87
|
|
}
|
|
88
|
|
|
|
89
|
|
// Try to acquire the mutex. Returns true on success, and false on failure.
|
|
90
|
|
bool TryLock() const TRY_ACQUIRE(true) {
|
|
91
|
|
// NOP, since there is no mutex. only here to still check for proper locking
|
|
92
|
|
return true;
|
|
93
|
|
}
|
|
94
|
|
|
|
95
|
|
// For negative capabilities.
|
|
96
|
|
const Mutex& operator!() const { return *this; }
|
|
97
|
|
};
|
|
98
|
|
|
|
99
|
|
#endif
|
|
100
|
|
|
|
101
|
|
// MutexLocker is an RAII class that acquires a mutex in its constructor, and
|
|
102
|
|
// releases it in its destructor.
|
|
103
|
|
class SCOPED_CAPABILITY MutexLocker final {
|
|
104
|
|
Mutex* mut;
|
|
105
|
|
|
|
106
|
|
public:
|
|
107
|
1
|
explicit MutexLocker(Mutex* mu) ACQUIRE(mu) : mut(mu) { mu->Lock(); }
|
|
108
|
|
|
|
109
|
|
MutexLocker(const MutexLocker&) = delete;
|
|
110
|
|
MutexLocker(MutexLocker&&) = delete;
|
|
111
|
|
MutexLocker& operator=(const MutexLocker&) = delete;
|
|
112
|
|
MutexLocker& operator=(MutexLocker&&) = delete;
|
|
113
|
|
|
|
114
|
1
|
~MutexLocker() RELEASE() { mut->Unlock(); }
|
|
115
|
|
};
|
|
116
|
|
|
|
117
|
|
} // namespace rawspeed
|
LebedevRI