database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-08-08 14:02:16 +03:00
Code Activity

Add code to invoke the virtual table transaction interface. Untested at this point. (CVS 3261)

Browse Source 
FossilOrigin-Name: 6125140228e09cad2029a48e92aa0123d3daecfb
This commit is contained in:
danielk1977
2006-06-16 16:08:53 +00:00
parent f1a381e7fc
commit f9e7dda7ef
11 changed files with 165 additions and 30 deletions
Download Patch File Download Diff File Expand all files Collapse all files

99
src/vtab.c
View File

@@ -11,7 +11,7 @@
*************************************************************************
** This file contains code used to help implement virtual tables.
**
** $Id: vtab.c,v 1.14 2006/06/16 08:01:04 danielk1977 Exp $
** $Id: vtab.c,v 1.15 2006/06/16 16:08:55 danielk1977 Exp $
*/
#ifndef SQLITE_OMIT_VIRTUALTABLE
#include "sqliteInt.h"
@@ -441,4 +441,101 @@ int sqlite3VtabCallDestroy(sqlite3 *db, int iDb, const char *zTab)
return rc;
}
static int callFinaliser(sqlite3 *db, int offset, int doDelete){
int rc = SQLITE_OK;
int i;
for(i=0; rc==SQLITE_OK && i<db->nVTrans && db->aVTrans[i]; i++){
sqlite3_vtab *pVtab = db->aVTrans[i];
int (*x)(sqlite3_vtab *);
x = (int (*)(sqlite3_vtab *))((char *)pVtab->pModule + offset);
if( x ){
rc = x(pVtab);
}
}
if( doDelete ){
sqliteFree(db->aVTrans);
db->nVTrans = 0;
db->aVTrans = 0;
}
return rc;
}
void sqlite3VtabCodeLock(Parse *pParse, Table *pTab){
Vdbe *v = sqlite3GetVdbe(pParse);
sqlite3VdbeOp3(v, OP_VBegin, 0, 0, (const char*)pTab->pVtab, P3_VTAB);
}
/*
** If argument rc is not SQLITE_OK, then return it and do nothing.
** Otherwise, invoke the xSync method of all virtual tables in the
** sqlite3.aVTrans array. Return the error code for the first error
** that occurs, or SQLITE_OK if all xSync operations are successful.
*/
int sqlite3VtabSync(sqlite3 *db, int rc){
if( rc!=SQLITE_OK ) return rc;
return callFinaliser(db, (int)(&((sqlite3_module *)0)->xSync), 0);
}
/*
** Invoke the xRollback method of all virtual tables in the
** sqlite3.aVTrans array. Then clear the array itself.
*/
int sqlite3VtabRollback(sqlite3 *db){
return callFinaliser(db, (int)(&((sqlite3_module *)0)->xRollback), 1);
}
/*
** Invoke the xCommit method of all virtual tables in the
** sqlite3.aVTrans array. Then clear the array itself.
*/
int sqlite3VtabCommit(sqlite3 *db){
return callFinaliser(db, (int)(&((sqlite3_module *)0)->xCommit), 1);
}
/*
** If the virtual table pVtab supports the transaction interface
** (xBegin/xRollback/xCommit and optionally xSync) and a transaction is
** not currently open, invoke the xBegin method now.
**
** If the xBegin call is successful, place the sqlite3_vtab pointer
** in the sqlite3.aVTrans array.
*/
int sqlite3VtabBegin(sqlite3 *db, sqlite3_vtab *pVtab){
int rc = SQLITE_OK;
const int ARRAY_INCR = 5;
const sqlite3_module *pModule = pVtab->pModule;
if( pModule->xBegin ){
int i;
/* If pVtab is already in the aVTrans array, return early */
for(i=0; (i<db->nVTrans) && 0!=db->aVTrans[i]; i++){
if( db->aVTrans[i]==pVtab ){
return SQLITE_OK;
}
}
/* Invoke the xBegin method */
rc = pModule->xBegin(pVtab);
if( rc!=SQLITE_OK ){
return rc;
}
/* Grow the sqlite3.aVTrans array if required */
if( (db->nVTrans%ARRAY_INCR)==0 ){
sqlite3_vtab *aVTrans;
int nBytes = sizeof(sqlite3_vtab *) * (db->nVTrans + ARRAY_INCR);
aVTrans = sqliteRealloc((void *)db->aVTrans, nBytes);
if( !aVTrans ){
return SQLITE_NOMEM;
}
memset(&aVTrans[db->nVTrans], 0, sizeof(sqlite3_vtab *)*ARRAY_INCR);
db->aVTrans = aVTrans;
}
/* Add pVtab to the end of sqlite3.aVTrans */
db->aVTrans[db->nVTrans++] = pVtab;
}
return rc;
}
#endif /* SQLITE_OMIT_VIRTUALTABLE */