SDL_systhread.c
1
2
/*
SDL - Simple DirectMedia Layer
3
Copyright (C) 1997-2012 Sam Lantinga
4
5
This library is free software; you can redistribute it and/or
6
modify it under the terms of the GNU Lesser General Public
7
License as published by the Free Software Foundation; either
8
version 2.1 of the License, or (at your option) any later version.
9
10
11
12
This library 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
13
Lesser General Public License for more details.
15
16
17
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18
19
Sam Lantinga
20
slouken@libsdl.org
21
*/
22
#include "SDL_config.h"
23
24
25
/* Win32 thread management routines for SDL */
26
27
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
28
29
#include "SDL_thread.h"
30
31
#include "../SDL_thread_c.h"
#include "../SDL_systhread.h"
33
34
35
36
37
38
#ifndef SDL_PASSED_BEGINTHREAD_ENDTHREAD
#ifndef _WIN32_WCE
/* We'll use the C library from this DLL */
#include <process.h>
#endif
39
#if defined(__WATCOMC__)
40
41
42
43
44
45
46
47
/* This is for Watcom targets except OS2 */
#if __WATCOMC__ < 1240
#define __watcall
#endif
typedef unsigned long (__watcall *pfnSDL_CurrentBeginThread) (void *, unsigned,
unsigned (__stdcall *func)(void *), void *arg,
unsigned, unsigned *threadID);
typedef void (__watcall *pfnSDL_CurrentEndThread)(unsigned code);
48
#elif (defined(__MINGW32__) && (__GNUC__ < 4))
49
50
51
52
typedef unsigned long (__cdecl *pfnSDL_CurrentBeginThread) (void *, unsigned,
unsigned (__stdcall *func)(void *), void *arg,
unsigned, unsigned *threadID);
typedef void (__cdecl *pfnSDL_CurrentEndThread)(unsigned code);
53
54
55
56
57
58
59
60
61
#else
typedef uintptr_t (__cdecl *pfnSDL_CurrentBeginThread) (void *, unsigned,
unsigned (__stdcall *func)(void *), void *arg,
unsigned, unsigned *threadID);
typedef void (__cdecl *pfnSDL_CurrentEndThread)(unsigned code);
#endif
#endif /* !SDL_PASSED_BEGINTHREAD_ENDTHREAD */
62
63
64
65
66
typedef struct ThreadStartParms
{
void *args;
pfnSDL_CurrentEndThread pfnCurrentEndThread;
} tThreadStartParms, *pThreadStartParms;
68
static DWORD RunThread(void *data)
70
71
72
73
74
75
76
77
78
79
pThreadStartParms pThreadParms = (pThreadStartParms)data;
pfnSDL_CurrentEndThread pfnCurrentEndThread = NULL;
// Call the thread function!
SDL_RunThread(pThreadParms->args);
// Get the current endthread we have to use!
if (pThreadParms)
{
pfnCurrentEndThread = pThreadParms->pfnCurrentEndThread;
80
SDL_free(pThreadParms);
81
82
83
84
85
}
// Call endthread!
if (pfnCurrentEndThread)
(*pfnCurrentEndThread)(0);
return(0);
86
87
}
88
89
90
91
92
93
94
95
96
97
static DWORD WINAPI RunThreadViaCreateThread(LPVOID data)
{
return RunThread(data);
}
static unsigned __stdcall RunThreadViaBeginThreadEx(void *data)
{
return (unsigned) RunThread(data);
}
98
#ifdef SDL_PASSED_BEGINTHREAD_ENDTHREAD
99
int SDL_SYS_CreateThread(SDL_Thread *thread, void *args, pfnSDL_CurrentBeginThread pfnBeginThread, pfnSDL_CurrentEndThread pfnEndThread)
100
{
101
102
103
104
105
106
107
108
109
110
111
#else
int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
{
#ifdef _WIN32_WCE
pfnSDL_CurrentBeginThread pfnBeginThread = NULL;
pfnSDL_CurrentEndThread pfnEndThread = NULL;
#else
pfnSDL_CurrentBeginThread pfnBeginThread = _beginthreadex;
pfnSDL_CurrentEndThread pfnEndThread = _endthreadex;
#endif
#endif /* SDL_PASSED_BEGINTHREAD_ENDTHREAD */
112
113
pThreadStartParms pThreadParms = (pThreadStartParms)SDL_malloc(sizeof(tThreadStartParms));
if (!pThreadParms) {
114
SDL_OutOfMemory();
115
116
return(-1);
}
118
119
120
121
// Save the function which we will have to call to clear the RTL of calling app!
pThreadParms->pfnCurrentEndThread = pfnEndThread;
// Also save the real parameters we have to pass to thread function
pThreadParms->args = args;
122
123
if (pfnBeginThread) {
124
unsigned threadid = 0;
125
thread->handle = (SYS_ThreadHandle)
126
((size_t) pfnBeginThread(NULL, 0, RunThreadViaBeginThreadEx,
127
pThreadParms, 0, &threadid));
129
DWORD threadid = 0;
130
thread->handle = CreateThread(NULL, 0, RunThreadViaCreateThread, pThreadParms, 0, &threadid);
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
if (thread->handle == NULL) {
SDL_SetError("Not enough resources to create thread");
return(-1);
}
return(0);
}
void SDL_SYS_SetupThread(void)
{
return;
}
Uint32 SDL_ThreadID(void)
{
return((Uint32)GetCurrentThreadId());
}
void SDL_SYS_WaitThread(SDL_Thread *thread)
{
WaitForSingleObject(thread->handle, INFINITE);
CloseHandle(thread->handle);
}
/* WARNING: This function is really a last resort.
* Threads should be signaled and then exit by themselves.
* TerminateThread() doesn't perform stack and DLL cleanup.
*/
void SDL_SYS_KillThread(SDL_Thread *thread)
{
TerminateThread(thread->handle, FALSE);
}