int lsm_config(lsm_db *pDb, int eParam, ...){
int rc = LSM_OK;
va_list ap;
va_start(ap, eParam);
switch( eParam ){
case LSM_CONFIG_AUTOFLUSH: {
/* This parameter is read and written in KB. But all internal
** processing is done in bytes. */
int *piVal = va_arg(ap, int *);
int iVal = *piVal;
if( iVal>=0 && iVal<=(1024*1024) ){
pDb->nTreeLimit = iVal*1024;
}
*piVal = (pDb->nTreeLimit / 1024);
break;
}
case LSM_CONFIG_AUTOWORK: {
int *piVal = va_arg(ap, int *);
if( *piVal>=0 ){
pDb->bAutowork = *piVal;
}
*piVal = pDb->bAutowork;
break;
}
case LSM_CONFIG_AUTOCHECKPOINT: {
/* This parameter is read and written in KB. But all internal processing
** (including the lsm_db.nAutockpt variable) is done in bytes. */
int *piVal = va_arg(ap, int *);
if( *piVal>=0 ){
int iVal = *piVal;
pDb->nAutockpt = (i64)iVal * 1024;
}
*piVal = (int)(pDb->nAutockpt / 1024);
break;
}
case LSM_CONFIG_PAGE_SIZE: {
int *piVal = va_arg(ap, int *);
if( pDb->pDatabase ){
/* If lsm_open() has been called, this is a read-only parameter.
** Set the output variable to the page-size according to the
** FileSystem object. */
*piVal = lsmFsPageSize(pDb->pFS);
}else{
if( *piVal>=256 && *piVal<=65536 && ((*piVal-1) & *piVal)==0 ){
pDb->nDfltPgsz = *piVal;
}else{
*piVal = pDb->nDfltPgsz;
}
}
break;
}
case LSM_CONFIG_BLOCK_SIZE: {
/* This parameter is read and written in KB. But all internal
** processing is done in bytes. */
int *piVal = va_arg(ap, int *);
if( pDb->pDatabase ){
/* If lsm_open() has been called, this is a read-only parameter.
** Set the output variable to the block-size in KB according to the
** FileSystem object. */
*piVal = lsmFsBlockSize(pDb->pFS) / 1024;
}else{
int iVal = *piVal;
if( iVal>=64 && iVal<=65536 && ((iVal-1) & iVal)==0 ){
pDb->nDfltBlksz = iVal * 1024;
}else{
*piVal = pDb->nDfltBlksz / 1024;
}
}
break;
}
case LSM_CONFIG_SAFETY: {
int *piVal = va_arg(ap, int *);
if( *piVal>=0 && *piVal<=2 ){
pDb->eSafety = *piVal;
}
*piVal = pDb->eSafety;
break;
}
case LSM_CONFIG_MMAP: {
int *piVal = va_arg(ap, int *);
if( pDb->iReader<0 && *piVal>=0 ){
pDb->iMmap = *piVal;
rc = lsmFsConfigure(pDb);
}
*piVal = pDb->iMmap;
break;
}
case LSM_CONFIG_USE_LOG: {
int *piVal = va_arg(ap, int *);
if( pDb->nTransOpen==0 && (*piVal==0 || *piVal==1) ){
pDb->bUseLog = *piVal;
}
*piVal = pDb->bUseLog;
break;
}
case LSM_CONFIG_AUTOMERGE: {
int *piVal = va_arg(ap, int *);
if( *piVal>1 ) pDb->nMerge = *piVal;
*piVal = pDb->nMerge;
break;
}
case LSM_CONFIG_MAX_FREELIST: {
int *piVal = va_arg(ap, int *);
if( *piVal>=2 && *piVal<=LSM_MAX_FREELIST_ENTRIES ){
pDb->nMaxFreelist = *piVal;
}
*piVal = pDb->nMaxFreelist;
break;
}
case LSM_CONFIG_MULTIPLE_PROCESSES: {
int *piVal = va_arg(ap, int *);
if( pDb->pDatabase ){
/* If lsm_open() has been called, this is a read-only parameter.
** Set the output variable to true if this connection is currently
** in multi-process mode. */
*piVal = lsmDbMultiProc(pDb);
}else{
pDb->bMultiProc = *piVal = (*piVal!=0);
}
break;
}
case LSM_CONFIG_READONLY: {
int *piVal = va_arg(ap, int *);
/* If lsm_open() has been called, this is a read-only parameter. */
if( pDb->pDatabase==0 && *piVal>=0 ){
pDb->bReadonly = *piVal = (*piVal!=0);
}
*piVal = pDb->bReadonly;
break;
}
case LSM_CONFIG_SET_COMPRESSION: {
lsm_compress *p = va_arg(ap, lsm_compress *);
if( pDb->iReader>=0 && pDb->bInFactory==0 ){
/* May not change compression schemes with an open transaction */
rc = LSM_MISUSE_BKPT;
}else{
if( pDb->compress.xFree ){
/* Invoke any destructor belonging to the current compression. */
pDb->compress.xFree(pDb->compress.pCtx);
}
if( p->xBound==0 ){
memset(&pDb->compress, 0, sizeof(lsm_compress));
pDb->compress.iId = LSM_COMPRESSION_NONE;
}else{
memcpy(&pDb->compress, p, sizeof(lsm_compress));
}
rc = lsmFsConfigure(pDb);
}
break;
}
case LSM_CONFIG_SET_COMPRESSION_FACTORY: {
lsm_compress_factory *p = va_arg(ap, lsm_compress_factory *);
if( pDb->factory.xFree ){
/* Invoke any destructor belonging to the current factory. */
pDb->factory.xFree(pDb->factory.pCtx);
}
memcpy(&pDb->factory, p, sizeof(lsm_compress_factory));
break;
}
case LSM_CONFIG_GET_COMPRESSION: {
lsm_compress *p = va_arg(ap, lsm_compress *);
memcpy(p, &pDb->compress, sizeof(lsm_compress));
break;
}
default:
rc = LSM_MISUSE;
break;
}
va_end(ap);
return rc;
}
int lsm_config(lsm_db *pDb, int eParam, ...){
int rc = LSM_OK;
va_list ap;
va_start(ap, eParam);
switch( eParam ){
case LSM_CONFIG_WRITE_BUFFER: {
int *piVal = va_arg(ap, int *);
if( *piVal>0 ){
pDb->nTreeLimit = *piVal;
}
*piVal = pDb->nTreeLimit;
break;
}
case LSM_CONFIG_AUTOWORK: {
int *piVal = va_arg(ap, int *);
if( *piVal>=0 ){
pDb->bAutowork = *piVal;
}
*piVal = pDb->bAutowork;
break;
}
case LSM_CONFIG_LOG_SIZE: {
int *piVal = va_arg(ap, int *);
if( *piVal>0 ){
pDb->nLogSz = *piVal;
}
*piVal = pDb->nLogSz;
break;
}
case LSM_CONFIG_PAGE_SIZE: {
int *piVal = va_arg(ap, int *);
if( pDb->pDatabase ){
/* If lsm_open() has been called, this is a read-only parameter.
** Set the output variable to the page-size according to the
** FileSystem object. */
*piVal = lsmFsPageSize(pDb->pFS);
}else{
if( *piVal>=256 && *piVal<=65536 && ((*piVal-1) & *piVal)==0 ){
pDb->nDfltPgsz = *piVal;
}else{
*piVal = pDb->nDfltPgsz;
}
}
break;
}
case LSM_CONFIG_BLOCK_SIZE: {
int *piVal = va_arg(ap, int *);
if( pDb->pDatabase ){
/* If lsm_open() has been called, this is a read-only parameter.
** Set the output variable to the page-size according to the
** FileSystem object. */
*piVal = lsmFsBlockSize(pDb->pFS);
}else{
if( *piVal>=65536 && ((*piVal-1) & *piVal)==0 ){
pDb->nDfltBlksz = *piVal;
}else{
*piVal = pDb->nDfltBlksz;
}
}
break;
}
case LSM_CONFIG_SAFETY: {
int *piVal = va_arg(ap, int *);
if( *piVal>=0 && *piVal<=2 ){
pDb->eSafety = *piVal;
}
*piVal = pDb->eSafety;
break;
}
case LSM_CONFIG_MMAP: {
int *piVal = va_arg(ap, int *);
rc = lsmConfigMmap(pDb, piVal);
break;
}
case LSM_CONFIG_USE_LOG: {
int *piVal = va_arg(ap, int *);
if( pDb->nTransOpen==0 && (*piVal==0 || *piVal==1) ){
pDb->bUseLog = *piVal;
}
*piVal = pDb->bUseLog;
break;
}
case LSM_CONFIG_NMERGE: {
int *piVal = va_arg(ap, int *);
if( *piVal>1 ) pDb->nMerge = *piVal;
*piVal = pDb->nMerge;
break;
}
default:
rc = LSM_MISUSE;
break;
}
va_end(ap);
return rc;
}
