65 lines
2 KiB
C
65 lines
2 KiB
C
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/*
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MEMWIN.C - This example shows how to get information
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about free memory with DPMI call 0x0500 using Windows
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as a DPMI host. Note that only the first field of the
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structure is guaranteed to contain a valid value; any
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field that is not returned by the DPMI implementation
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is set to -1 (0FFFFFFFFh).
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Compile & Link: wcl386 /l=win386 /zw memwin
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Bind: wbind -n memwin
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*/
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#include <windows.h>
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#include <i86.h>
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#include <dos.h>
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#include <stdio.h>
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struct meminfo {
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unsigned LargestBlockAvail;
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unsigned MaxUnlockedPage;
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unsigned LargestLockablePage;
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unsigned LinAddrSpace;
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unsigned NumFreePagesAvail;
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unsigned NumPhysicalPagesFree;
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unsigned TotalPhysicalPages;
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unsigned FreeLinAddrSpace;
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unsigned SizeOfPageFile;
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unsigned Reserved[3];
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} MemInfo;
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#define DPMI_INT 0x31
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void main()
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{
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union REGS regs;
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struct SREGS sregs;
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DWORD mi_16;
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regs.w.ax = 0x0500;
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mi_16 = AllocAlias16( &MemInfo );
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sregs.ds = 0;
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sregs.es = HIWORD( mi_16 );
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regs.x.di = LOWORD( mi_16 );
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int86x( DPMI_INT, ®s, ®s, &sregs );
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printf( "Largest available block (in bytes): %ld\n",
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MemInfo.LargestBlockAvail );
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printf( "Maximum unlocked page allocation: %lu\n",
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MemInfo.MaxUnlockedPage );
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printf( "Pages that can be allocated and locked: %lu\n",
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MemInfo.LargestLockablePage );
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printf( "Total linear address space including allocated"
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" pages: %lu\n", MemInfo.LinAddrSpace );
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printf( "Number of free pages available: %lu\n",
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MemInfo.NumFreePagesAvail );
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printf( "Number of physical pages not in use: %lu\n",
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MemInfo.NumPhysicalPagesFree );
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printf( "Total physical pages managed by host: %lu\n",
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MemInfo.TotalPhysicalPages );
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printf( "Free linear address space (pages): %lu\n",
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MemInfo.FreeLinAddrSpace );
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printf( "Size of paging/file partition (pages): %lu\n",
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MemInfo.SizeOfPageFile );
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FreeAlias16( mi_16 );
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}
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