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Overview
| Comment: | Implement xLock and xTestLock for lsm1 on Win32. |
|---|---|
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| SHA3-256: |
9112117dad8085c385aa614cd982b307 |
| User & Date: | mistachkin 2017-06-28 21:36:40.949 |
Context
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2017-06-29
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| 00:20 | Implement xRemap for lsm1 on Win32. Also, zero file handle when closing it. (check-in: 93c9aa7d9a user: mistachkin tags: lsm-vtab) | |
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2017-06-28
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| 21:36 | Implement xLock and xTestLock for lsm1 on Win32. (check-in: 9112117dad user: mistachkin tags: lsm-vtab) | |
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2017-06-27
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| 22:33 | Improve a local variable name. (check-in: d0f6973d93 user: mistachkin tags: lsm-vtab) | |
Changes
Changes to ext/lsm1/lsm_win32.c.
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}
static int lsmWin32OsUnlink(lsm_env *pEnv, const char *zFile){
return LSM_ERROR;
}
int lsmWin32OsLock(lsm_file *pFile, int iLock, int eType){
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}
static int lsmWin32OsUnlink(lsm_env *pEnv, const char *zFile){
return LSM_ERROR;
}
int lsmWin32OsLock(lsm_file *pFile, int iLock, int eType){
Win32File *pWin32File = (Win32File *)pFile;
OVERLAPPED ovlp;
assert( LSM_LOCK_UNLOCK==0 );
assert( LSM_LOCK_SHARED==1 );
assert( LSM_LOCK_EXCL==2 );
assert( eType>=LSM_LOCK_UNLOCK && eType<=LSM_LOCK_EXCL );
assert( iLock>0 && iLock<=32 );
memset(&ovlp, 0, sizeof(OVERLAPPED));
ovlp.Offset = (4096-iLock);
if( eType>LSM_LOCK_UNLOCK ){
DWORD flags = LOCKFILE_FAIL_IMMEDIATELY;
if( eType>=LSM_LOCK_EXCL ) flags |= LOCKFILE_EXCLUSIVE_LOCK;
if( !LockFileEx(pWin32File->hFile, flags, 0, 1, 0, &ovlp) ){
if( GetLastError()==ERROR_IO_PENDING ){
return LSM_BUSY;
}else{
return LSM_IOERR_BKPT;
}
}
}else{
if( !UnlockFileEx(pWin32File->hFile, 0, 1, 0, &ovlp) ){
return LSM_IOERR_BKPT;
}
}
return LSM_OK;
}
int lsmWin32OsTestLock(lsm_file *pFile, int iLock, int nLock, int eType){
Win32File *pWin32File = (Win32File *)pFile;
DWORD flags = LOCKFILE_FAIL_IMMEDIATELY;
OVERLAPPED ovlp;
assert( LSM_LOCK_UNLOCK==0 );
assert( LSM_LOCK_SHARED==1 );
assert( LSM_LOCK_EXCL==2 );
assert( eType==LSM_LOCK_SHARED || eType==LSM_LOCK_EXCL );
assert( nLock>=0 );
assert( iLock>0 && iLock<=32 );
if( eType>=LSM_LOCK_EXCL ) flags |= LOCKFILE_EXCLUSIVE_LOCK;
memset(&ovlp, 0, sizeof(OVERLAPPED));
ovlp.Offset = (4096-iLock);
if( !LockFileEx(pWin32File->hFile, flags, 0, (DWORD)nLock, 0, &ovlp) ){
if( GetLastError()==ERROR_IO_PENDING ){
return LSM_BUSY;
}else{
return LSM_IOERR_BKPT;
}
}
UnlockFileEx(pWin32File->hFile, 0, (DWORD)nLock, 0, &ovlp);
return LSM_OK;
}
int lsmWin32OsShmMap(lsm_file *pFile, int iChunk, int sz, void **ppShm){
return LSM_ERROR;
}
void lsmWin32OsShmBarrier(void){
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