SDL_systhread.c
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/*
Simple DirectMedia Layer
Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
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)
{
#elif defined(__CYGWIN__) || defined(__WINRT__)
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
WaitForSingleObject(thread->handle, INFINITE);
#endif
CloseHandle(thread->handle);
}
void
SDL_SYS_DetachThread(SDL_Thread * thread)
{
CloseHandle(thread->handle);
}
#endif /* SDL_THREAD_WINDOWS */
/* vi: set ts=4 sw=4 expandtab: */
RunThread
static void * RunThread(void *data)
Definition: SDL_systhread.c:70
data
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1967
SYS_ThreadHandle
int SYS_ThreadHandle
Definition: SDL_systhread_c.h:24
name
GLuint const GLchar * name
Definition: SDL_opengl_glext.h:660
SDL_THREAD_PRIORITY_HIGH
Definition: SDL_thread.h:62
SDL_thread.h
SDL_ThreadID
SDL_threadID SDL_ThreadID(void)
Definition: SDL_systhread.c:48
SDL_SYS_WaitThread
void SDL_SYS_WaitThread(SDL_Thread *thread)
Definition: SDL_systhread.c:60
d
SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char const char SDL_SCANF_FORMAT_STRING const char return SDL_ThreadFunction const char void return Uint32 return Uint32 SDL_AssertionHandler void SDL_SpinLock SDL_atomic_t int int return SDL_atomic_t return void void void return void return int return SDL_AudioSpec SDL_AudioSpec return int int return return int SDL_RWops int SDL_AudioSpec Uint8 ** d
Definition: SDL_dynapi_procs.h:121
value
GLsizei const GLfloat * value
Definition: SDL_opengl_glext.h:698
SDL_free
void SDL_free(void *mem)
SDL_SYS_SetThreadPriority
int SDL_SYS_SetThreadPriority(SDL_ThreadPriority priority)
Definition: SDL_systhread.c:54
c
const GLubyte * c
Definition: SDL_opengl_glext.h:11093
SDL_SYS_DetachThread
void SDL_SYS_DetachThread(SDL_Thread *thread)
Definition: SDL_systhread.c:66
uintptr_t
unsigned int uintptr_t
Definition: SDL_config_windows.h:69
SDL_THREAD_PRIORITY_LOW
Definition: SDL_thread.h:60
NULL
#define NULL
Definition: begin_code.h:143
SDL_OutOfMemory
#define SDL_OutOfMemory()
Definition: SDL_error.h:52
WIN_SetError
int WIN_SetError(const char *prefix)
SDL_Thread::handle
SYS_ThreadHandle handle
Definition: SDL_thread_c.h:57
SDL_SetError
#define SDL_SetError
Definition: SDL_dynapi_overrides.h:36
void
SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char const char SDL_SCANF_FORMAT_STRING const char return SDL_ThreadFunction const char void return Uint32 return Uint32 void
Definition: SDL_dynapi_procs.h:93
func
GLenum func
Definition: SDL_opengl_glext.h:657
SDL_ThreadPriority
SDL_ThreadPriority
Definition: SDL_thread.h:59
SDL_RunThread
void SDL_RunThread(void *data)
Definition: SDL_thread.c:264
SDL_SYS_SetupThread
void SDL_SYS_SetupThread(const char *name)
Definition: SDL_systhread.c:42
SDL_Thread
Definition: SDL_thread_c.h:54
SDL_malloc
#define SDL_malloc
Definition: SDL_dynapi_overrides.h:380
FALSE
#define FALSE
Definition: edid-parse.c:32
a
GLboolean GLboolean GLboolean GLboolean a
Definition: SDL_opengl_glext.h:1109
SDL_SYS_CreateThread
int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
Definition: SDL_systhread.c:35
b
GLboolean GLboolean GLboolean b
Definition: SDL_opengl_glext.h:1109
SDL_threadID
unsigned long SDL_threadID
Definition: SDL_thread.h:49