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/*
ChibiOS/GFX - Copyright (C) 2012, 2013
Joel Bodenmann aka Tectu <joel@unormal.org>
This file is part of ChibiOS/GFX.
ChibiOS/GFX 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; either version 3 of the License, or
(at your option) any later version.
ChibiOS/GFX 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file src/gos/chibios.c
* @brief GOS ChibiOS Operating System support.
*/
#include "gfx.h"
#if GFX_USE_OS_WIN32
#include <stdio.h>
static HANDLE SystemMutex;
void _gosInit(void) {
}
void gfxHalt(const char *msg) {
fprintf(stderr, "%s\n", msg);
ExitProcess(1);
}
void gfxSleepMicroseconds(delaytime_t ms) {
static LARGE_INTEGER pcfreq;
static int initflag;
LARGE_INTEGER t1, t2, tdiff;
switch(ms) {
case TIME_IMMEDIATE: return;
case TIME_INFINITE: while(1) Sleep(1000); return;
}
if (!initflag) {
QueryPerformanceFrequency(&pcfreq);
initflag++;
}
tdiff.QuadPart = pcfreq.QuadPart * ms / 1000000;
QueryPerformanceCounter(&t1);
do {
QueryPerformanceCounter(&t2);
} while (t2.QuadPart - t1.QuadPart < tdiff.QuadPart);
}
void gfxSystemLock(void) {
if (!SystemMutex)
SystemMutex = CreateMutex(NULL, FALSE, NULL);
WaitForSingleObject(SystemMutex, INFINITE);
}
void gfxSystemUnlock(void) {
ReleaseMutex(SystemMutex);
}
bool_t gfxSemWait(gfxSem *psem, delaytime_t ms) {
return WaitForSingleObject(*psem, ms) == WAIT_OBJECT_0;
}
typedef LONG __stdcall (*_NtQuerySemaphore)(
HANDLE SemaphoreHandle,
DWORD SemaphoreInformationClass, /* Would be SEMAPHORE_INFORMATION_CLASS */
PVOID SemaphoreInformation, /* but this is to much to dump here */
ULONG SemaphoreInformationLength,
PULONG ReturnLength OPTIONAL
);
semcount_t gfxSemCounter(gfxSem *pSem) {
static _NtQuerySemaphore NtQuerySemaphore;
struct _SEMAPHORE_BASIC_INFORMATION {
ULONG CurrentCount;
ULONG MaximumCount;
} BasicInfo;
if (!NtQuerySemaphore)
NtQuerySemaphore = (_NtQuerySemaphore)GetProcAddress(GetModuleHandle("ntdll.dll"), "NtQuerySemaphore");
NtQuerySemaphore(*pSem, 0, &BasicInfo, sizeof(BasicInfo), NULL);
return BasicInfo.CurrentCount;
}
gfxThreadHandle gfxThreadCreate(void *stackarea, size_t stacksz, threadpriority_t prio, DECLARE_THREAD_FUNCTION((*fn),p), void *param) {
(void) stackarea;
HANDLE thd;
if (!(thd = CreateThread(NULL, stacksz, fn, param, CREATE_SUSPENDED, NULL)))
return FALSE;
SetThreadPriority(thd, prio);
ResumeThread(thd);
return thd;
}
threadreturn_t gfxThreadWait(gfxThreadHandle thread) {
DWORD ret;
WaitForSingleObject(thread, INFINITE);
GetExitCodeThread(thread, &ret);
CloseHandle(thread);
return ret;
}
#endif /* GFX_USE_OS_WIN32 */
/** @} */
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