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/*++
Copyright (c) 1990 Microsoft Corporation
Module Name:
tfile.c
Abstract:
Test program for Win32 Base File API calls
Author:
Mark Lucovsky (markl) 26-Sep-1990
Revision History:
--*/
#include <windows.h>
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
VOID
TryLock(
int Type,
HANDLE Handle,
DWORD Offset,
DWORD StartOffset,
DWORD Range,
BOOL ExpectedResult
);
#define Lock 1
#define Unlock 2
DWORD
_cdecl
main(
int argc,
char *argv[],
char *envp[]
)
{
HANDLE iFile;
int offset;
char *fileName;
printf( "Number of arguments = %d\n", argc );
if ( argc >= 2 ) {
fileName = argv[1];
} else {
fileName = "testfile.txt";
}
iFile = CreateFile(
fileName,
GENERIC_READ,
FILE_SHARE_READ,
NULL,
OPEN_EXISTING,
0,
NULL
);
if ( iFile != INVALID_HANDLE_VALUE ) {
printf("Opened file, handle = %d\n", iFile );
} else {
printf("Failed to open %s, err = %d\n", fileName, GetLastError() );
}
if ( argc == 3 ) {
offset = atoi( argv[2] );
} else {
offset = 0;
}
printf("File offset = %d\n", offset );
TryLock( Lock, iFile, offset, 10, 10, TRUE ); // 10 - 19
TryLock( Lock, iFile, offset, 10, 20, TRUE ); // 10 - 29
TryLock( Lock, iFile, offset, 0, 30, TRUE ); // 0 - 29
// TryLock( Lock, iFile, offset, 1, 1, FALSE );
// TryLock( Lock, iFile, offset, 0, 11, FALSE );
// TryLock( Lock, iFile, offset, 0, 20, FALSE );
// TryLock( Unlock, iFile, offset, 1, 1, FALSE );
// TryLock( Unlock, iFile, offset, 0, 12, FALSE );
// TryLock( Unlock, iFile, offset, 0, 20, FALSE );
// TryLock( Lock, iFile, offset, 0, 10, TRUE );
// TryLock( Lock, iFile, offset, 10, 10, TRUE );
// Sleep(20 * 1000);
TryLock( Unlock, iFile, offset, 0, 10, TRUE );
TryLock( Unlock, iFile, offset, 10, 10, TRUE );
CloseHandle(iFile);
printf("Done\n");
return 1;
}
VOID
TryLock(
int Type,
HANDLE Handle,
DWORD Offset,
DWORD StartOffset,
DWORD Range,
BOOL ExpectedResult
)
{
BOOL result;
DWORD err;
OVERLAPPED overlapped;
if ( Type == Lock ) {
overlapped.Offset = StartOffset + Offset;
overlapped.OffsetHigh = 0;
result = LockFileEx( Handle, LOCKFILE_EXCLUSIVE_LOCK, 0, Range, 0, &overlapped );
if (!result && GetLastError() == ERROR_IO_PENDING) {
err = WaitForSingleObject( Handle, INFINITE );
if ( err == WAIT_OBJECT_0 ) {
err = overlapped.Internal;
}
if ( err == 0 ) {
result = TRUE;
} else {
result = FALSE;
}
}
} else {
result = UnlockFile( Handle, StartOffset + Offset, 0, Range, 0 );
}
if ( result == ExpectedResult ) {
return;
} else {
err = GetLastError();
printf("Expected %d got %d for %slock at %d L%d\n",
ExpectedResult, result,
Type == Lock ? "" : "un",
StartOffset + Offset, Range );
if ( !result ) {
printf("Unexpected error = %08lx\n", err );
}
}
}
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