121 lines
3.1 KiB
C
121 lines
3.1 KiB
C
/*
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ChibiOS/GFX - Copyright (C) 2012, 2013
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Joel Bodenmann aka Tectu <joel@unormal.org>
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This file is part of ChibiOS/GFX.
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ChibiOS/GFX is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/GFX is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file src/gos/chibios.c
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* @brief GOS ChibiOS Operating System support.
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*/
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#include "gfx.h"
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#if GFX_USE_OS_WIN32
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#include <stdio.h>
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static HANDLE SystemMutex;
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void _gosInit(void) {
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}
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void gfxHalt(const char *msg) {
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fprintf(stderr, "%s\n", msg);
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ExitProcess(1);
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}
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void gfxSleepMicroseconds(delaytime_t ms) {
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static LARGE_INTEGER pcfreq;
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static int initflag;
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LARGE_INTEGER t1, t2, tdiff;
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switch(ms) {
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case TIME_IMMEDIATE: return;
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case TIME_INFINITE: while(1) Sleep(1000); return;
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}
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if (!initflag) {
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QueryPerformanceFrequency(&pcfreq);
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initflag++;
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}
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tdiff.QuadPart = pcfreq.QuadPart * ms / 1000000;
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QueryPerformanceCounter(&t1);
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do {
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QueryPerformanceCounter(&t2);
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} while (t2.QuadPart - t1.QuadPart < tdiff.QuadPart);
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}
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void gfxSystemLock(void) {
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if (!SystemMutex)
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SystemMutex = CreateMutex(NULL, FALSE, NULL);
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WaitForSingleObject(SystemMutex, INFINITE);
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}
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void gfxSystemUnlock(void) {
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ReleaseMutex(SystemMutex);
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}
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bool_t gfxSemWait(gfxSem *psem, delaytime_t ms) {
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return WaitForSingleObject(*psem, ms) == WAIT_OBJECT_0;
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}
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typedef LONG __stdcall (*_NtQuerySemaphore)(
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HANDLE SemaphoreHandle,
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DWORD SemaphoreInformationClass, /* Would be SEMAPHORE_INFORMATION_CLASS */
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PVOID SemaphoreInformation, /* but this is to much to dump here */
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ULONG SemaphoreInformationLength,
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PULONG ReturnLength OPTIONAL
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);
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semcount_t gfxSemCounter(gfxSem *pSem) {
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static _NtQuerySemaphore NtQuerySemaphore;
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struct _SEMAPHORE_BASIC_INFORMATION {
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ULONG CurrentCount;
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ULONG MaximumCount;
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} BasicInfo;
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if (!NtQuerySemaphore)
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NtQuerySemaphore = (_NtQuerySemaphore)GetProcAddress(GetModuleHandle("ntdll.dll"), "NtQuerySemaphore");
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NtQuerySemaphore(*pSem, 0, &BasicInfo, sizeof(BasicInfo), NULL);
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return BasicInfo.CurrentCount;
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}
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gfxThreadHandle gfxThreadCreate(void *stackarea, size_t stacksz, threadpriority_t prio, DECLARE_THREAD_FUNCTION((*fn),p), void *param) {
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(void) stackarea;
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HANDLE thd;
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if (!(thd = CreateThread(NULL, stacksz, fn, param, CREATE_SUSPENDED, NULL)))
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return FALSE;
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SetThreadPriority(thd, prio);
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ResumeThread(thd);
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return thd;
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}
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threadreturn_t gfxThreadWait(gfxThreadHandle thread) {
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DWORD ret;
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WaitForSingleObject(thread, INFINITE);
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GetExitCodeThread(thread, &ret);
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CloseHandle(thread);
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return ret;
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}
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#endif /* GFX_USE_OS_WIN32 */
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/** @} */
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