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
|
/* $Id$ */
/*
* This file is part of OpenTTD.
* OpenTTD 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, version 2.
* OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file thread_os2.cpp OS/2 implementation of Threads. */
#include "../stdafx.h"
#include "thread.h"
#define INCL_DOS
#include <os2.h>
#include <process.h>
/**
* OS/2 version for ThreadObject.
*/
class ThreadObject_OS2 : public ThreadObject {
private:
TID thread; ///< System thread identifier.
OTTDThreadFunc proc; ///< External thread procedure.
void *param; ///< Parameter for the external thread procedure.
bool self_destruct; ///< Free ourselves when done?
public:
/**
* Create a thread and start it, calling proc(param).
*/
ThreadObject_OS2(OTTDThreadFunc proc, void *param, bool self_destruct) :
thread(0),
proc(proc),
param(param),
self_destruct(self_destruct)
{
thread = _beginthread(stThreadProc, NULL, 32768, this);
}
/* virtual */ bool Exit()
{
_endthread();
return true;
}
/* virtual */ void Join()
{
DosWaitThread(&this->thread, DCWW_WAIT);
this->thread = 0;
}
private:
/**
* On thread creation, this function is called, which calls the real startup
* function. This to get back into the correct instance again.
*/
static void stThreadProc(void *thr)
{
((ThreadObject_OS2 *)thr)->ThreadProc();
}
/**
* A new thread is created, and this function is called. Call the custom
* function of the creator of the thread.
*/
void ThreadProc()
{
/* Call the proc of the creator to continue this thread */
try {
this->proc(this->param);
} catch (OTTDThreadExitSignal e) {
} catch (...) {
NOT_REACHED();
}
if (self_destruct) {
this->Exit();
delete this;
}
}
};
/* static */ bool ThreadObject::New(OTTDThreadFunc proc, void *param, ThreadObject **thread)
{
ThreadObject *to = new ThreadObject_OS2(proc, param, thread == NULL);
if (thread != NULL) *thread = to;
return true;
}
/**
* OS/2 version of ThreadMutex.
*/
class ThreadMutex_OS2 : public ThreadMutex {
private:
HMTX mutex; ///< The mutex.
HEV event; ///< Event for waiting.
uint recursive_count; ///< Recursive lock count.
public:
ThreadMutex_OS2() : recursive_count(0)
{
DosCreateMutexSem(NULL, &mutex, 0, FALSE);
DosCreateEventSem(NULL, &event, 0, FALSE);
}
/* virtual */ ~ThreadMutex_OS2()
{
DosCloseMutexSem(mutex);
DosCloseEventSem(event);
}
/* virtual */ void BeginCritical(bool allow_recursive = false)
{
/* os2 mutex is recursive by itself */
DosRequestMutexSem(mutex, (unsigned long) SEM_INDEFINITE_WAIT);
this->recursive_count++;
if (!allow_recursive && this->recursive_count != 1) NOT_REACHED();
}
/* virtual */ void EndCritical(bool allow_recursive = false)
{
if (!allow_recursive && this->recursive_count != 1) NOT_REACHED();
this->recursive_count--;
DosReleaseMutexSem(mutex);
}
/* virtual */ void WaitForSignal()
{
assert(this->recursive_count == 1); // Do we need to call Begin/EndCritical multiple times otherwise?
this->EndCritical();
DosWaitEventSem(event, SEM_INDEFINITE_WAIT);
this->BeginCritical();
}
/* virtual */ void SendSignal()
{
DosPostEventSem(event);
}
};
/* static */ ThreadMutex *ThreadMutex::New()
{
return new ThreadMutex_OS2();
}
|
