mirror of https://github.com/mpv-player/mpv
51 lines
908 B
C
51 lines
908 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 <errno.h>
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#ifdef __i386__
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#include <sys/perm.h>
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#else
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#ifndef __sparc__
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#include <sys/io.h>
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#endif
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#endif
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#include "config.h"
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#ifdef CONFIG_DHAHELPER
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#include <fcntl.h>
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int dhahelper_initialized = 0;
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int dhahelper_fd = 0;
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#endif
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static __inline__ int enable_os_io(void)
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{
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#ifdef CONFIG_DHAHELPER
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dhahelper_fd = open("/dev/dhahelper", O_RDWR);
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if (dhahelper_fd > 0)
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{
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dhahelper_initialized = 1;
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return(0);
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}
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dhahelper_initialized = -1;
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#endif
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if (iopl(3) != 0)
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return(errno);
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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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#ifdef CONFIG_DHAHELPER
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if (dhahelper_initialized == 1)
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close(dhahelper_fd);
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else
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#endif
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if (iopl(0) != 0)
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return(errno);
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return(0);
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}
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