gos_win32.c

/*
 * This file is subject to the terms of the GFX License. If a copy of
 * the license was not distributed with this file, you can obtain one at:
 *
 *              http://ugfx.io/license.html
 */
 
// We need to include stdio.h below. Turn off GFILE_NEED_STDIO just for this file to prevent conflicts
#define GFILE_NEED_STDIO_MUST_BE_OFF
 
#include "../../gfx.h"
 
#if GFX_USE_OS_WIN32
 
#include <stdio.h>
 
static HANDLE   SystemMutex;
 
void _gosInit(void)
{
    /* No initialization of the operating system itself is needed */
}
 
void _gosPostInit(void)
{
}
 
void _gosDeinit(void)
{
 
}
 
void gfxHalt(const char *msg) {
    if (msg)
        fprintf(stderr, "%s\n", msg);
 
    ExitProcess(1);
}
 
void gfxSleepMicroseconds(gDelay ms) {
    static LARGE_INTEGER pcfreq;
    static int initflag;
    LARGE_INTEGER t1, t2, tdiff;
 
    switch(ms) {
        case gDelayNone:
            return;
 
        case gDelayForever:
            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(0, FALSE, 0);
    WaitForSingleObject(SystemMutex, INFINITE);
}
 
void gfxSystemUnlock(void) {
    ReleaseMutex(SystemMutex);
}
 
gBool gfxSemWait(gSem *psem, gDelay 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
);
 
/* - Left here simply because of its undocumented cleverness...
gSemcount gfxSemCounter(gSem *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), 0);
 
    return BasicInfo.CurrentCount;
}
*/
 
gThread gfxThreadCreate(void *stackarea, gMemSize stacksz, gThreadpriority prio, GFX_THREAD_FUNCTION(*fn,p), void *param) {
    (void)  stackarea;
    HANDLE  thd;
 
    if (!(thd = CreateThread(0, stacksz, fn, param, CREATE_SUSPENDED, 0)))
        return 0;
 
    SetThreadPriority(thd, prio);
    ResumeThread(thd);
 
    return thd;
}
 
gThreadreturn gfxThreadWait(gThread thread) {
    DWORD   ret;
 
    WaitForSingleObject(thread, INFINITE);
    GetExitCodeThread(thread, &ret);
    CloseHandle(thread);
 
    return ret;
}
 
#endif /* GFX_USE_OS_WIN32 */