/*

Simple DirectMedia Layer

This software is provided 'as-is', without any express or implied

warranty. In no event will the authors be held liable for any damages

arising from the use of this software.

Permission is granted to anyone to use this software for any purpose,

including commercial applications, and to alter it and redistribute it

freely, subject to the following restrictions:

1. The origin of this software must not be misrepresented; you must not

claim that you wrote the original software. If you use this software

in a product, an acknowledgment in the product documentation would be

appreciated but is not required.

2. Altered source versions must be plainly marked as such, and must not be

misrepresented as being the original software.

3. This notice may not be removed or altered from any source distribution.

*/

#include "../../SDL_internal.h"

#if SDL_THREAD_WINDOWS

/* Win32 thread management routines for SDL */

#include "SDL_thread.h"

#include "../SDL_thread_c.h"

#include "../SDL_systhread.h"

#include "SDL_systhread_c.h"

#ifndef SDL_PASSED_BEGINTHREAD_ENDTHREAD

/* We'll use the C library from this DLL */

#include <process.h>

/* Cygwin gcc-3 ... MingW64 (even with a i386 host) does this like MSVC. */

#if (defined(__MINGW32__) && (__GNUC__ < 4))

typedef unsigned long (__cdecl *pfnSDL_CurrentBeginThread) (void *, unsigned,

unsigned (__stdcall *func)(void *), void *arg,

unsigned, unsigned *threadID);

typedef void (__cdecl *pfnSDL_CurrentEndThread)(unsigned code);

#elif defined(__WATCOMC__)

/* 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);

#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 */

typedef struct ThreadStartParms

{

void *args;

pfnSDL_CurrentEndThread pfnCurrentEndThread;

} tThreadStartParms, *pThreadStartParms;

static DWORD

RunThread(void *data)

{

pThreadStartParms pThreadParms = (pThreadStartParms) data;

pfnSDL_CurrentEndThread pfnEndThread = pThreadParms->pfnCurrentEndThread;

void *args = pThreadParms->args;

SDL_free(pThreadParms);

SDL_RunThread(args);

if (pfnEndThread != NULL)

pfnEndThread(0);

return (0);

}

static DWORD WINAPI

RunThreadViaCreateThread(LPVOID data)

{

return RunThread(data);

}

static unsigned __stdcall

RunThreadViaBeginThreadEx(void *data)

{

return (unsigned) RunThread(data);

}

#ifdef SDL_PASSED_BEGINTHREAD_ENDTHREAD

int

SDL_SYS_CreateThread(SDL_Thread * thread, void *args,

pfnSDL_CurrentBeginThread pfnBeginThread,

pfnSDL_CurrentEndThread pfnEndThread)

{

int

SDL_SYS_CreateThread(SDL_Thread * thread, void *args)

{

pfnSDL_CurrentBeginThread pfnBeginThread = NULL;

pfnSDL_CurrentEndThread pfnEndThread = NULL;

#else

int

SDL_SYS_CreateThread(SDL_Thread * thread, void *args)

{

pfnSDL_CurrentBeginThread pfnBeginThread = (pfnSDL_CurrentBeginThread)_beginthreadex;

pfnSDL_CurrentEndThread pfnEndThread = (pfnSDL_CurrentEndThread)_endthreadex;

#endif /* SDL_PASSED_BEGINTHREAD_ENDTHREAD */

pThreadStartParms pThreadParms =

(pThreadStartParms) SDL_malloc(sizeof(tThreadStartParms));

if (!pThreadParms) {

return SDL_OutOfMemory();

}

/* 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;

if (pfnBeginThread) {

unsigned threadid = 0;

thread->handle = (SYS_ThreadHandle)

((size_t) pfnBeginThread(NULL, 0, RunThreadViaBeginThreadEx,

pThreadParms, 0, &threadid));

} else {

DWORD threadid = 0;

thread->handle = CreateThread(NULL, 0, RunThreadViaCreateThread,

pThreadParms, 0, &threadid);

}

if (thread->handle == NULL) {

return SDL_SetError("Not enough resources to create thread");

}

return 0;

}

#if 0 /* !!! FIXME: revisit this later. See https://bugzilla.libsdl.org/show_bug.cgi?id=2089 */

#ifdef _MSC_VER

#pragma warning(disable : 4733)

#pragma pack(push,8)

typedef struct tagTHREADNAME_INFO

{

DWORD dwType; /* must be 0x1000 */

LPCSTR szName; /* pointer to name (in user addr space) */

DWORD dwThreadID; /* thread ID (-1=caller thread) */

DWORD dwFlags; /* reserved for future use, must be zero */

} THREADNAME_INFO;

#pragma pack(pop)

static EXCEPTION_DISPOSITION

ignore_exception(void *a, void *b, void *c, void *d)

{

return ExceptionContinueExecution;

}

#endif

#endif

void

SDL_SYS_SetupThread(const char *name)

{

if (name != NULL) {

#if 0 /* !!! FIXME: revisit this later. See https://bugzilla.libsdl.org/show_bug.cgi?id=2089 */

#if (defined(_MSC_VER) && defined(_M_IX86))

/* This magic tells the debugger to name a thread if it's listening.

The inline asm sets up SEH (__try/__except) without C runtime

support. See Microsoft Systems Journal, January 1997:

http://www.microsoft.com/msj/0197/exception/exception.aspx */

INT_PTR handler = (INT_PTR) ignore_exception;

THREADNAME_INFO inf;

inf.dwType = 0x1000;

inf.szName = name;

inf.dwThreadID = (DWORD) -1;

inf.dwFlags = 0;

__asm { /* set up SEH */

push handler

push fs:[0]

mov fs:[0],esp

}

/* The program itself should ignore this bogus exception. */

RaiseException(0x406D1388, 0, sizeof(inf)/sizeof(DWORD), (DWORD*)&inf);

__asm { /* tear down SEH. */

mov eax,[esp]

mov fs:[0], eax

add esp, 8

}

#endif

#endif

}

}

SDL_threadID

SDL_ThreadID(void)

{

return ((SDL_threadID) GetCurrentThreadId());

}

int

SDL_SYS_SetThreadPriority(SDL_ThreadPriority priority)

{

int value;

if (priority == SDL_THREAD_PRIORITY_LOW) {

value = THREAD_PRIORITY_LOWEST;

} else if (priority == SDL_THREAD_PRIORITY_HIGH) {

value = THREAD_PRIORITY_HIGHEST;

} else {

value = THREAD_PRIORITY_NORMAL;

}

if (!SetThreadPriority(GetCurrentThread(), value)) {

return WIN_SetError("SetThreadPriority()");

}

return 0;

}

void

SDL_SYS_WaitThread(SDL_Thread * thread)

{

#if __WINRT__

WaitForSingleObjectEx(thread->handle, INFINITE, FALSE);

#else

CloseHandle(thread->handle);

}

void

SDL_SYS_DetachThread(SDL_Thread * thread)

{

CloseHandle(thread->handle);

}

#endif /* SDL_THREAD_WINDOWS */

/* vi: set ts=4 sw=4 expandtab: */