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Implement xLock and xTestLock for lsm1 on Win32.
FossilOrigin-Name: 9112117dad8085c385aa614cd982b307f5822761607ba358f34df7848c549134
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@ -459,11 +459,59 @@ static int lsmWin32OsUnlink(lsm_env *pEnv, const char *zFile){
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}
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int lsmWin32OsLock(lsm_file *pFile, int iLock, int eType){
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return LSM_ERROR;
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Win32File *pWin32File = (Win32File *)pFile;
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OVERLAPPED ovlp;
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assert( LSM_LOCK_UNLOCK==0 );
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assert( LSM_LOCK_SHARED==1 );
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assert( LSM_LOCK_EXCL==2 );
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assert( eType>=LSM_LOCK_UNLOCK && eType<=LSM_LOCK_EXCL );
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assert( iLock>0 && iLock<=32 );
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memset(&ovlp, 0, sizeof(OVERLAPPED));
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ovlp.Offset = (4096-iLock);
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if( eType>LSM_LOCK_UNLOCK ){
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DWORD flags = LOCKFILE_FAIL_IMMEDIATELY;
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if( eType>=LSM_LOCK_EXCL ) flags |= LOCKFILE_EXCLUSIVE_LOCK;
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if( !LockFileEx(pWin32File->hFile, flags, 0, 1, 0, &ovlp) ){
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if( GetLastError()==ERROR_IO_PENDING ){
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return LSM_BUSY;
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}else{
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return LSM_IOERR_BKPT;
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}
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}
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}else{
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if( !UnlockFileEx(pWin32File->hFile, 0, 1, 0, &ovlp) ){
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return LSM_IOERR_BKPT;
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}
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}
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return LSM_OK;
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}
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int lsmWin32OsTestLock(lsm_file *pFile, int iLock, int nLock, int eType){
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return LSM_ERROR;
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Win32File *pWin32File = (Win32File *)pFile;
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DWORD flags = LOCKFILE_FAIL_IMMEDIATELY;
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OVERLAPPED ovlp;
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assert( LSM_LOCK_UNLOCK==0 );
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assert( LSM_LOCK_SHARED==1 );
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assert( LSM_LOCK_EXCL==2 );
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assert( eType==LSM_LOCK_SHARED || eType==LSM_LOCK_EXCL );
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assert( nLock>=0 );
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assert( iLock>0 && iLock<=32 );
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if( eType>=LSM_LOCK_EXCL ) flags |= LOCKFILE_EXCLUSIVE_LOCK;
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memset(&ovlp, 0, sizeof(OVERLAPPED));
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ovlp.Offset = (4096-iLock);
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if( !LockFileEx(pWin32File->hFile, flags, 0, (DWORD)nLock, 0, &ovlp) ){
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if( GetLastError()==ERROR_IO_PENDING ){
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return LSM_BUSY;
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}else{
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return LSM_IOERR_BKPT;
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}
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}
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UnlockFileEx(pWin32File->hFile, 0, (DWORD)nLock, 0, &ovlp);
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return LSM_OK;
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}
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int lsmWin32OsShmMap(lsm_file *pFile, int iChunk, int sz, void **ppShm){
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