mirror of https://github.com/mpv-player/mpv
39 lines
1021 B
C
39 lines
1021 B
C
/*
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This file is based on:
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$XFree86: xc/programs/Xserver/hw/xfree86/etc/scanpci.c,v 3.34.2.17 1998/11/10 11:55:40 dawes Exp $
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Modified for readability by Nick Kurshev
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*/
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#include <windows.h>
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#include <ddk/ntddk.h>
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#include "../dhahelperwin/dhahelper.h"
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static HANDLE hDriver;
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extern int IsWinNT();
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static __inline__ int enable_os_io(void)
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{
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if(IsWinNT()){
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DWORD dwBytesReturned;
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hDriver = CreateFile("\\\\.\\DHAHELPER",GENERIC_READ | GENERIC_WRITE,0,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
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if(!DeviceIoControl(hDriver, IOCTL_DHAHELPER_ENABLEDIRECTIO, NULL,0, NULL, 0, &dwBytesReturned, NULL)){
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printf("unable to enable directio please install dhahelper.sys\n");
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return(1);
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}
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}
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return(0);
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}
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static __inline__ int disable_os_io(void)
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{
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if(IsWinNT()){
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DWORD dwBytesReturned;
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DeviceIoControl(hDriver, IOCTL_DHAHELPER_DISABLEDIRECTIO, NULL,0, NULL, 0, &dwBytesReturned, NULL);
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CloseHandle(hDriver);
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}
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return(0);
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}
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