1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
/*
* Copyright (C) 2001-2012 Jacek Sieka, arnetheduck on gmail point com
* Copyright (C) 2009-2020 EiskaltDC++ developers
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#pragma once
#ifndef _WIN32
#if defined(__APPLE__) && defined(__MACH__)
#include "CriticalSection.h"
#else
#include <errno.h>
#include <semaphore.h>
#endif
#include <sys/time.h>
#endif
#include "NonCopyable.h"
namespace dcpp {
class Semaphore : private NonCopyable
{
#if defined(_WIN32)
public:
Semaphore() noexcept :
h(CreateSemaphore(NULL, 0, MAXLONG, NULL))
{ }
void signal() noexcept {
ReleaseSemaphore(h, 1, NULL);
}
bool wait() noexcept { return WaitForSingleObject(h, INFINITE) == WAIT_OBJECT_0; }
bool wait(uint32_t millis) noexcept { return WaitForSingleObject(h, millis) == WAIT_OBJECT_0; }
~Semaphore() {
CloseHandle(h);
}
private:
HANDLE h;
#elif defined(__APPLE__) && defined(__MACH__)
public:
Semaphore() noexcept : count(0) { pthread_cond_init(&cond, NULL); }
~Semaphore() { pthread_cond_destroy(&cond); }
void signal() noexcept {
Lock l(cs);
count++;
pthread_cond_signal(&cond);
}
bool wait() noexcept {
Lock l(cs);
while (count == 0) {
pthread_cond_wait(&cond, &cs.getMutex());
}
count--;
return true;
}
bool wait(uint32_t millis) noexcept {
Lock l(cs);
if(count == 0) {
timeval timev;
timespec t;
gettimeofday(&timev, NULL);
millis+=timev.tv_usec/1000;
t.tv_sec = timev.tv_sec + (millis/1000);
t.tv_nsec = (millis%1000)*1000*1000;
int ret;
do {
ret = pthread_cond_timedwait(&cond, &cs.getMutex(), &t);
} while (ret==0 && count==0);
if(ret != 0) {
return false;
}
}
count--;
return true;
}
private:
pthread_cond_t cond;
CriticalSection cs;
int count;
#else
public:
Semaphore() noexcept {
sem_init(&semaphore, 0, 0);
}
~Semaphore() {
sem_destroy(&semaphore);
}
void signal() noexcept {
sem_post(&semaphore);
}
bool wait() noexcept {
int retval = 0;
do {
retval = sem_wait(&semaphore);
} while (retval != 0);
return true;
}
bool wait(uint32_t millis) noexcept {
timeval timev;
timespec t;
gettimeofday(&timev, NULL);
millis+=timev.tv_usec/1000;
t.tv_sec = timev.tv_sec + (millis/1000);
t.tv_nsec = (millis%1000)*1000*1000;
int ret;
do {
ret = sem_timedwait(&semaphore, &t);
} while (ret != 0 && errno == EINTR);
if (ret != 0) {
return false;
}
return true;
}
private:
sem_t semaphore;
#endif
};
} // namespace dcpp
|
