1/*
2    SDL - Simple DirectMedia Layer
3    Copyright (C) 1997-2006 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    This library is distributed in the hope that it will be useful,
11    but WITHOUT ANY WARRANTY; without even the implied warranty of
12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13    Lesser General Public License for more details.
14
15    You should have received a copy of the GNU Lesser General Public
16    License along with this library; if not, write to the Free Software
17    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/* Win32 thread management routines for SDL */
25
26#define WIN32_LEAN_AND_MEAN
27#include <windows.h>
28
29#include "SDL_thread.h"
30#include "../SDL_thread_c.h"
31#include "../SDL_systhread.h"
32
33#ifndef SDL_PASSED_BEGINTHREAD_ENDTHREAD
34#ifndef _WIN32_WCE
35/* We'll use the C library from this DLL */
36#include <process.h>
37#endif
38
39#if __GNUC__
40typedef unsigned long (__cdecl *pfnSDL_CurrentBeginThread) (void *, unsigned,
41        unsigned (__stdcall *func)(void *), void *arg,
42        unsigned, unsigned *threadID);
43typedef void (__cdecl *pfnSDL_CurrentEndThread)(unsigned code);
44#elif defined(__WATCOMC__)
45/* This is for Watcom targets except OS2 */
46#if __WATCOMC__ < 1240
47#define __watcall
48#endif
49typedef unsigned long (__watcall *pfnSDL_CurrentBeginThread) (void *, unsigned,
50        unsigned (__stdcall *func)(void *), void *arg,
51        unsigned, unsigned *threadID);
52typedef void (__watcall *pfnSDL_CurrentEndThread)(unsigned code);
53#else
54typedef uintptr_t (__cdecl *pfnSDL_CurrentBeginThread) (void *, unsigned,
55        unsigned (__stdcall *func)(void *), void *arg,
56        unsigned, unsigned *threadID);
57typedef void (__cdecl *pfnSDL_CurrentEndThread)(unsigned code);
58#endif
59#endif /* !SDL_PASSED_BEGINTHREAD_ENDTHREAD */
60
61
62typedef struct ThreadStartParms
63{
64  void *args;
65  pfnSDL_CurrentEndThread pfnCurrentEndThread;
66} tThreadStartParms, *pThreadStartParms;
67
68static unsigned __stdcall RunThread(void *data)
69{
70  pThreadStartParms pThreadParms = (pThreadStartParms)data;
71  pfnSDL_CurrentEndThread pfnCurrentEndThread = NULL;
72
73  // Call the thread function!
74  SDL_RunThread(pThreadParms->args);
75
76  // Get the current endthread we have to use!
77  if (pThreadParms)
78  {
79    pfnCurrentEndThread = pThreadParms->pfnCurrentEndThread;
80    SDL_free(pThreadParms);
81  }
82  // Call endthread!
83  if (pfnCurrentEndThread)
84    (*pfnCurrentEndThread)(0);
85  return(0);
86}
87
88#ifdef SDL_PASSED_BEGINTHREAD_ENDTHREAD
89int SDL_SYS_CreateThread(SDL_Thread *thread, void *args, pfnSDL_CurrentBeginThread pfnBeginThread, pfnSDL_CurrentEndThread pfnEndThread)
90{
91#else
92int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
93{
94#ifdef _WIN32_WCE
95	pfnSDL_CurrentBeginThread pfnBeginThread = NULL;
96	pfnSDL_CurrentEndThread pfnEndThread = NULL;
97#else
98	pfnSDL_CurrentBeginThread pfnBeginThread = _beginthreadex;
99	pfnSDL_CurrentEndThread pfnEndThread = _endthreadex;
100#endif
101#endif /* SDL_PASSED_BEGINTHREAD_ENDTHREAD */
102	unsigned threadid;
103	pThreadStartParms pThreadParms = (pThreadStartParms)SDL_malloc(sizeof(tThreadStartParms));
104	if (!pThreadParms) {
105		SDL_OutOfMemory();
106		return(-1);
107	}
108
109	// Save the function which we will have to call to clear the RTL of calling app!
110	pThreadParms->pfnCurrentEndThread = pfnEndThread;
111	// Also save the real parameters we have to pass to thread function
112	pThreadParms->args = args;
113
114	if (pfnBeginThread) {
115		thread->handle = (SYS_ThreadHandle) pfnBeginThread(NULL, 0, RunThread,
116				pThreadParms, 0, &threadid);
117	} else {
118		thread->handle = CreateThread(NULL, 0, RunThread, pThreadParms, 0, &threadid);
119	}
120	if (thread->handle == NULL) {
121		SDL_SetError("Not enough resources to create thread");
122		return(-1);
123	}
124	return(0);
125}
126
127void SDL_SYS_SetupThread(void)
128{
129	return;
130}
131
132Uint32 SDL_ThreadID(void)
133{
134	return((Uint32)GetCurrentThreadId());
135}
136
137void SDL_SYS_WaitThread(SDL_Thread *thread)
138{
139	WaitForSingleObject(thread->handle, INFINITE);
140	CloseHandle(thread->handle);
141}
142
143/* WARNING: This function is really a last resort.
144 * Threads should be signaled and then exit by themselves.
145 * TerminateThread() doesn't perform stack and DLL cleanup.
146 */
147void SDL_SYS_KillThread(SDL_Thread *thread)
148{
149	TerminateThread(thread->handle, FALSE);
150}
151