Directory: | ./ |
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File: | pdserv/src/PThread.h |
Date: | 2025-07-20 04:11:05 |
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Lines: | 35 | 48 | 72.9% |
Branches: | 5 | 10 | 50.0% |
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1 | /***************************************************************************** | ||
2 | * | ||
3 | * Copyright 2017 Richard Hacker (lerichi at gmx dot net) | ||
4 | * | ||
5 | * This file is part of the pdserv library. | ||
6 | * | ||
7 | * The pdserv library is free software: you can redistribute it and/or modify | ||
8 | * it under the terms of the GNU Lesser General Public License as published | ||
9 | * by the Free Software Foundation, either version 3 of the License, or (at | ||
10 | * your option) any later version. | ||
11 | * | ||
12 | * The pdserv library is distributed in the hope that it will be useful, but | ||
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | ||
14 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public | ||
15 | * License for more details. | ||
16 | * | ||
17 | * You should have received a copy of the GNU Lesser General Public License | ||
18 | * along with the pdserv library. If not, see <http://www.gnu.org/licenses/>. | ||
19 | * | ||
20 | *****************************************************************************/ | ||
21 | |||
22 | #ifndef PTHREAD_H | ||
23 | #define PTHREAD_H | ||
24 | |||
25 | #include <pthread.h> | ||
26 | #include <stdexcept> | ||
27 | |||
28 | namespace pthread { | ||
29 | |||
30 | ////////////////////////////////////////////////////////////////////// | ||
31 | class RWLock { | ||
32 | public: | ||
33 | RWLock(); | ||
34 | ~RWLock(); | ||
35 | |||
36 | 70 | void writelock() { | |
37 |
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70 | pthread_rwlock_wrlock(&lock); |
38 | 70 | } | |
39 | |||
40 | 10000 | void readlock() { | |
41 |
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10000 | pthread_rwlock_rdlock(&lock); |
42 | 10000 | } | |
43 | |||
44 | 10070 | void unlock() { | |
45 |
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10070 | pthread_rwlock_unlock(&lock); |
46 | 10070 | } | |
47 | |||
48 | private: | ||
49 | pthread_rwlock_t lock; | ||
50 | }; | ||
51 | |||
52 | class ReadLock { | ||
53 | public: | ||
54 | 10000 | ReadLock(RWLock &l): lock(l) { | |
55 | 10000 | lock.readlock(); | |
56 | 10000 | } | |
57 | |||
58 | 20000 | ~ReadLock() { | |
59 | 10000 | lock.unlock(); | |
60 | 10000 | } | |
61 | |||
62 | private: | ||
63 | RWLock &lock; | ||
64 | }; | ||
65 | |||
66 | class WriteLock { | ||
67 | public: | ||
68 | 70 | WriteLock(RWLock &l): lock(l) { | |
69 | 70 | lock.writelock(); | |
70 | 70 | } | |
71 | |||
72 | 140 | ~WriteLock() { | |
73 | 70 | lock.unlock(); | |
74 | 70 | } | |
75 | |||
76 | private: | ||
77 | RWLock &lock; | ||
78 | }; | ||
79 | |||
80 | |||
81 | ////////////////////////////////////////////////////////////////////// | ||
82 | class Mutex { | ||
83 | public: | ||
84 | Mutex(); | ||
85 | ~Mutex(); | ||
86 | |||
87 | 10359 | void lock() { | |
88 |
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10359 | pthread_mutex_lock(&mutex); |
89 | 10359 | } | |
90 | |||
91 | 10359 | void unlock() { | |
92 |
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10359 | pthread_mutex_unlock(&mutex); |
93 | 10359 | } | |
94 | |||
95 | |||
96 | private: | ||
97 | pthread_mutex_t mutex; | ||
98 | }; | ||
99 | |||
100 | class MutexLock { | ||
101 | public: | ||
102 | 10359 | MutexLock(Mutex &m): mutex(m) { | |
103 | 10359 | mutex.lock(); | |
104 | 10359 | } | |
105 | |||
106 | 20718 | ~MutexLock() { | |
107 | 10359 | mutex.unlock(); | |
108 | 10359 | } | |
109 | |||
110 | private: | ||
111 | Mutex &mutex; | ||
112 | }; | ||
113 | |||
114 | ////////////////////////////////////////////////////////////////////// | ||
115 | template <class T> | ||
116 | ✗ | class AtomicCounter { | |
117 | public: | ||
118 | ✗ | AtomicCounter(const T &initval = T()) { | |
119 | ✗ | counter = initval; | |
120 | } | ||
121 | |||
122 | ✗ | T operator++() { | |
123 | ✗ | MutexLock l(mutex); | |
124 | ✗ | return ++counter; | |
125 | } | ||
126 | |||
127 | ✗ | T operator--() { | |
128 | ✗ | MutexLock l(mutex); | |
129 | ✗ | return --counter; | |
130 | } | ||
131 | |||
132 | ✗ | operator T() { | |
133 | ✗ | MutexLock l(mutex); | |
134 | ✗ | return counter; | |
135 | } | ||
136 | |||
137 | private: | ||
138 | T counter; | ||
139 | Mutex mutex; | ||
140 | }; | ||
141 | |||
142 | ////////////////////////////////////////////////////////////////////// | ||
143 | class Thread { | ||
144 | public: | ||
145 | // throw this to cancel a Thread from within | ||
146 | 8 | struct CancelThread : std::exception | |
147 | {}; | ||
148 | |||
149 | Thread(const std::string &); | ||
150 | Thread() = delete; | ||
151 | virtual ~Thread(); | ||
152 | |||
153 | void set_priority(int); | ||
154 | int start(); | ||
155 | int detach(); | ||
156 | void terminate() noexcept; | ||
157 | void *join() noexcept; | ||
158 | |||
159 | static void sleep(int msec); | ||
160 | |||
161 | static constexpr int priority_unset_value = -1; | ||
162 | |||
163 | protected: | ||
164 | 296 | virtual void initial() {}; | |
165 | virtual void run() = 0; | ||
166 | ✗ | virtual void final() {}; | |
167 | |||
168 | private: | ||
169 | static void *start_routine(void *arg); | ||
170 | |||
171 | pthread_attr_t attr; | ||
172 | pthread_t id; | ||
173 | int rt_priority = priority_unset_value; | ||
174 | bool was_started = false; | ||
175 | std::string name; | ||
176 | }; | ||
177 | } | ||
178 | |||
179 | #endif // PTHREAD_H | ||
180 |