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/*
dbRW
Copyright (c) 2005-2009 Robert Rainwater
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "dbrw.h"
static char **sql_prepare_text;
static sqlite3_stmt ***sql_prepare_stmt;
static int sql_prepare_len = 0;
static unsigned sqlThreadId;
static HANDLE hSqlThread;
static HWND hAPCWindow = NULL;
static HANDLE hSqlThreadEvent = NULL;
static unsigned __stdcall sql_threadProc(void *arg);
static DWORD CALLBACK sql_apcproc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam);
enum {
SQL_STMT_BEGIN=0,
SQL_STMT_END,
SQL_STMT_NUM
};
static char *sql_stmts[SQL_STMT_NUM] = {
"BEGIN TRANSACTION;",
"COMMIT;"
};
sqlite3_stmt *sql_stmts_prep[SQL_STMT_NUM] = {0};
typedef struct TSqlMessage {
int op;
sqlite3 *pDb;
sqlite3_stmt *pStmt;
int retCode;
const char *zIn;
HANDLE hDoneEvent;
} TSqlMessage;
enum {
SQL_STEP,
SQL_RESET,
SQL_EXEC,
SQL_OPEN,
SQL_CLOSE,
SQL_PREPARE,
SQL_FINALIZE
};
void sql_init() {
hSqlThreadEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
hSqlThread = (HANDLE)mir_forkthreadex(sql_threadProc, 0, 0, &sqlThreadId);
hAPCWindow = CreateWindowEx(0, _T("STATIC"), NULL, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL);
SetWindowLongPtr(hAPCWindow, GWLP_WNDPROC, (LONG_PTR)sql_apcproc);
sql_prepare_add(sql_stmts, sql_stmts_prep, SQL_STMT_NUM);
}
void sql_destroy() {
int i;
for(i = 0; i < sql_prepare_len; i++)
sql_finalize(*sql_prepare_stmt[i]);
dbrw_free(sql_prepare_text);
dbrw_free(sql_prepare_stmt);
SetEvent(hSqlThreadEvent); // kill off the sql thread
CloseHandle(hSqlThread);
DestroyWindow(hAPCWindow);
}
void sql_prepare_add(char **text, sqlite3_stmt **stmts, int len) {
int i;
sql_prepare_text = (char**)dbrw_realloc(sql_prepare_text, (sql_prepare_len+len)*sizeof(char*));
sql_prepare_stmt = (sqlite3_stmt***)dbrw_realloc(sql_prepare_stmt, (sql_prepare_len+len)*sizeof(sqlite3_stmt**));
for (i=0; i<len; i++) {
sql_prepare_text[sql_prepare_len+i] = text[i];
sql_prepare_stmt[sql_prepare_len+i] = &stmts[i];
}
sql_prepare_len += len;
}
void sql_prepare_statements() {
int i;
for(i = 0; i < sql_prepare_len; i++)
sql_prepare(g_sqlite, sql_prepare_text[i], sql_prepare_stmt[i]);
}
int sql_stmt_begin() {
int rc = sql_step(sql_stmts_prep[SQL_STMT_BEGIN]);
sql_reset(sql_stmts_prep[SQL_STMT_BEGIN]);
return rc;
}
int sql_stmt_end() {
int rc = sql_step(sql_stmts_prep[SQL_STMT_END]);
sql_reset(sql_stmts_prep[SQL_STMT_END]);
return rc;
}
static unsigned __stdcall sql_threadProc(void *arg) {
while (WaitForSingleObjectEx(hSqlThreadEvent, INFINITE, TRUE)!=WAIT_OBJECT_0);
CloseHandle(hSqlThreadEvent);
return 0;
}
static DWORD CALLBACK sql_apcproc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) {
if (msg==WM_NULL)
SleepEx(0, TRUE);
return DefWindowProc(hwnd, msg, wParam, lParam);
}
static void CALLBACK sql_server_sync_apc(DWORD dwParam) {
TSqlMessage *msg = (TSqlMessage*)dwParam;
if (!msg) {
log0("Fatal call to sql_sync_apc");
return;
}
switch(msg->op) {
case SQL_STEP:
msg->retCode = sqlite3_step(msg->pStmt);
break;
case SQL_RESET:
msg->retCode = sqlite3_reset(msg->pStmt);
break;
case SQL_EXEC:
msg->retCode = sqlite3_exec(msg->pDb, msg->zIn, NULL, NULL, NULL);
break;
case SQL_OPEN:
msg->retCode = sqlite3_open(msg->zIn, &msg->pDb);
break;
case SQL_CLOSE:
msg->retCode = sqlite3_close(msg->pDb);
break;
case SQL_PREPARE:
msg->retCode = sqlite3_prepare_v2(msg->pDb, msg->zIn, -1, &msg->pStmt, NULL);
break;
case SQL_FINALIZE:
msg->retCode = sqlite3_finalize(msg->pStmt);
break;
default:
log1("Invalid op code in sql server (msg->op=%d)", msg->op);
return;
}
SetEvent(msg->hDoneEvent);
}
static void sql_server_sync(TSqlMessage *msg) {
msg->hDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
sql_server_sync_apc((DWORD)msg);
PostMessage(hAPCWindow, WM_NULL, 0, 0);
WaitForSingleObject(msg->hDoneEvent, INFINITE);
CloseHandle(msg->hDoneEvent);
}
int sql_step(sqlite3_stmt *stmt) {
TSqlMessage msg;
msg.op = SQL_STEP;
msg.pStmt = stmt;
sql_server_sync(&msg);
return msg.retCode;
}
int sql_reset(sqlite3_stmt *stmt) {
TSqlMessage msg;
msg.op = SQL_RESET;
msg.pStmt = stmt;
sql_server_sync(&msg);
return msg.retCode;
}
int sql_exec(sqlite3 *sql, const char *query) {
TSqlMessage msg;
msg.op = SQL_EXEC;
msg.pDb = sql;
msg.zIn = query;
sql_server_sync(&msg);
return msg.retCode;
}
int sql_open(const char *path, sqlite3 **sql) {
TSqlMessage msg;
msg.op = SQL_OPEN;
msg.zIn = path;
sql_server_sync(&msg);
*sql = msg.pDb;
return msg.retCode;
}
int sql_close(sqlite3 *sql) {
TSqlMessage msg;
msg.op = SQL_CLOSE;
msg.pDb = sql;
sql_server_sync(&msg);
return msg.retCode;
}
int sql_prepare(sqlite3 *sql, const char *query, sqlite3_stmt **stmt) {
TSqlMessage msg;
msg.op = SQL_PREPARE;
msg.pDb = sql;
msg.zIn = query;
sql_server_sync(&msg);
*stmt = msg.pStmt;
return msg.retCode;
}
int sql_finalize(sqlite3_stmt *stmt) {
TSqlMessage msg;
msg.op = SQL_FINALIZE;
msg.pStmt = stmt;
sql_server_sync(&msg);
return msg.retCode;
}
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