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Adding more thread locking code. This is an incremental check-in. (CVS 4262)

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FossilOrigin-Name: 7428732b1fa04b83eda0a3539834693ef351313e
This commit is contained in:
drh
2007-08-21 16:15:55 +00:00
parent 605264d2d8
commit e30f442622
5 changed files with 195 additions and 136 deletions
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61
src/vdbeapi.c
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@@ -29,6 +29,67 @@ int sqlite3_expired(sqlite3_stmt *pStmt){
return p==0 || p->expired;
}
/*
** The following routine destroys a virtual machine that is created by
** the sqlite3_compile() routine. The integer returned is an SQLITE_
** success/failure code that describes the result of executing the virtual
** machine.
**
** This routine sets the error code and string returned by
** sqlite3_errcode(), sqlite3_errmsg() and sqlite3_errmsg16().
*/
int sqlite3_finalize(sqlite3_stmt *pStmt){
int rc;
if( pStmt==0 ){
rc = SQLITE_OK;
}else{
Vdbe *v = (Vdbe*)pStmt;
sqlite3_mutex_enter(v->db->mutex);
rc = sqlite3VdbeFinalize(v);
sqlite3_mutex_leave(v->db->mutex);
}
return rc;
}
/*
** Terminate the current execution of an SQL statement and reset it
** back to its starting state so that it can be reused. A success code from
** the prior execution is returned.
**
** This routine sets the error code and string returned by
** sqlite3_errcode(), sqlite3_errmsg() and sqlite3_errmsg16().
*/
int sqlite3_reset(sqlite3_stmt *pStmt){
int rc;
if( pStmt==0 ){
rc = SQLITE_OK;
}else{
Vdbe *v = (Vdbe*)pStmt;
sqlite3_mutex_enter(v->db->mutex);
rc = sqlite3VdbeReset(v);
sqlite3VdbeMakeReady(v, -1, 0, 0, 0);
assert( (rc & (v->db->errMask))==rc );
sqlite3_mutex_leave(v->db->mutex);
}
return rc;
}
/*
** Set all the parameters in the compiled SQL statement to NULL.
*/
int sqlite3_clear_bindings(sqlite3_stmt *pStmt){
int i;
int rc = SQLITE_OK;
Vdbe *v = (Vdbe*)pStmt;
sqlite3_mutex_enter(v->db->mutex);
for(i=1; rc==SQLITE_OK && i<=sqlite3_bind_parameter_count(pStmt); i++){
rc = sqlite3_bind_null(pStmt, i);
}
sqlite3_mutex_leave(v->db->mutex);
return rc;
}
/**************************** sqlite3_value_ *******************************
** The following routines extract information from a Mem or sqlite3_value
** structure.