-
Notifications
You must be signed in to change notification settings - Fork 43
/
GThread.cpp
229 lines (183 loc) · 4.74 KB
/
GThread.cpp
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
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
/**
@file GThread.cpp
GThread class.
@created 2005-09-24
@edited 2005-10-22
*/
#include "G3D/GThread.h"
#include "G3D/System.h"
#include "G3D/debugAssert.h"
#include "G3D/GMutex.h"
namespace G3D {
namespace _internal {
class BasicThread: public GThread {
public:
BasicThread(const std::string& name, void (*proc)(void*), void* param):
GThread(name), m_wrapperProc(proc), m_param(param) { }
protected:
virtual void threadMain() {
m_wrapperProc(m_param);
}
private:
void (*m_wrapperProc)(void*);
void* m_param;
};
} // namespace _internal
GThread::GThread(const std::string& name):
m_status(STATUS_CREATED),
m_name(name) {
#ifdef G3D_WIN32
m_event = NULL;
#endif
// system-independent clear of handle
System::memset(&m_handle, 0, sizeof(m_handle));
}
GThread::~GThread() {
#ifdef _MSC_VER
# pragma warning( push )
# pragma warning( disable : 4127 )
#endif
alwaysAssertM(m_status != STATUS_RUNNING, "Deleting thread while running.");
#ifdef _MSC_VER
# pragma warning( pop )
#endif
#ifdef G3D_WIN32
if (m_event) {
::CloseHandle(m_event);
}
#endif
}
GThreadRef GThread::create(const std::string& name, void (*proc)(void*), void* param) {
return new _internal::BasicThread(name, proc, param);
}
bool GThread::started() const {
return m_status != STATUS_CREATED;
}
bool GThread::start(SpawnBehavior behavior) {
debugAssertM(! started(), "Thread has already executed.");
if (started()) {
return false;
}
m_status = STATUS_STARTED;
if (behavior == USE_CURRENT_THREAD) {
// Run on this thread
m_status = STATUS_RUNNING;
threadMain();
m_status = STATUS_COMPLETED;
return true;
}
# ifdef G3D_WIN32
DWORD threadId;
m_event = ::CreateEvent(NULL, TRUE, FALSE, NULL);
debugAssert(m_event);
m_handle = ::CreateThread(NULL, 0, &internalThreadProc, this, 0, &threadId);
if (m_handle == NULL) {
::CloseHandle(m_event);
m_event = NULL;
}
return (m_handle != NULL);
# else
if (!pthread_create(&m_handle, NULL, &internalThreadProc, this)) {
return true;
} else {
// system-independent clear of handle
System::memset(&m_handle, 0, sizeof(m_handle));
return false;
}
# endif
}
void GThread::terminate() {
if (m_handle) {
# ifdef G3D_WIN32
::TerminateThread(m_handle, 0);
# else
pthread_kill(m_handle, SIGSTOP);
# endif
// system-independent clear of handle
System::memset(&m_handle, 0, sizeof(m_handle));
}
}
bool GThread::running() const{
return (m_status == STATUS_RUNNING);
}
bool GThread::completed() const {
return (m_status == STATUS_COMPLETED);
}
void GThread::waitForCompletion() {
if (m_status == STATUS_COMPLETED) {
// Must be done
return;
}
# ifdef G3D_WIN32
debugAssert(m_event);
::WaitForSingleObject(m_event, INFINITE);
# else
debugAssert(m_handle);
pthread_join(m_handle, NULL);
# endif
}
#ifdef G3D_WIN32
DWORD WINAPI GThread::internalThreadProc(LPVOID param) {
GThread* current = reinterpret_cast<GThread*>(param);
debugAssert(current->m_event);
current->m_status = STATUS_RUNNING;
current->threadMain();
current->m_status = STATUS_COMPLETED;
::SetEvent(current->m_event);
return 0;
}
#else
void* GThread::internalThreadProc(void* param) {
GThread* current = reinterpret_cast<GThread*>(param);
current->m_status = STATUS_RUNNING;
current->threadMain();
current->m_status = STATUS_COMPLETED;
return (void*)NULL;
}
#endif
//GMutex implementation
GMutex::GMutex() {
#ifdef G3D_WIN32
::InitializeCriticalSection(&m_handle);
#else
int ret = pthread_mutexattr_init(&m_attr);
debugAssert(ret == 0);
ret = pthread_mutexattr_settype(&m_attr, PTHREAD_MUTEX_RECURSIVE);
debugAssert(ret == 0);
ret = pthread_mutex_init(&m_handle, &m_attr);
debugAssert(ret == 0);
#endif
}
GMutex::~GMutex() {
//TODO: Debug check for locked
#ifdef G3D_WIN32
::DeleteCriticalSection(&m_handle);
#else
int ret = pthread_mutex_destroy(&m_handle);
debugAssert(ret == 0);
ret = pthread_mutexattr_destroy(&m_attr);
debugAssert(ret == 0);
#endif
}
bool GMutex::tryLock() {
#ifdef G3D_WIN32
return (::TryEnterCriticalSection(&m_handle) != 0);
#else
return (pthread_mutex_trylock(&m_handle) == 0);
#endif
}
void GMutex::lock() {
#ifdef G3D_WIN32
::EnterCriticalSection(&m_handle);
#else
pthread_mutex_lock(&m_handle);
#endif
}
void GMutex::unlock() {
#ifdef G3D_WIN32
::LeaveCriticalSection(&m_handle);
#else
pthread_mutex_unlock(&m_handle);
#endif
}
} // namespace G3D