mirror of
https://github.com/sqlite/sqlite.git
synced 2025-11-03 16:53:36 +03:00
134 lines
3.5 KiB
C
134 lines
3.5 KiB
C
/*
|
|
** 2004 January 13
|
|
**
|
|
** The author disclaims copyright to this source code. In place of
|
|
** a legal notice, here is a blessing:
|
|
**
|
|
** May you do good and not evil.
|
|
** May you find forgiveness for yourself and forgive others.
|
|
** May you share freely, never taking more than you give.
|
|
**
|
|
*************************************************************************
|
|
** This file implements a simple standalone program used to test whether
|
|
** or not the SQLite library is threadsafe.
|
|
**
|
|
** This file is NOT part of the standard SQLite library. It is used for
|
|
** testing only.
|
|
*/
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <pthread.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include "sqlite.h"
|
|
|
|
/*
|
|
** Name of the database
|
|
*/
|
|
#define DB_FILE "test.db"
|
|
|
|
/*
|
|
** When this variable becomes non-zero, all threads stop
|
|
** what they are doing.
|
|
*/
|
|
volatile int all_stop = 0;
|
|
|
|
/*
|
|
** Callback from the integrity check. If the result is anything other
|
|
** than "ok" it means the integrity check has failed. Set the "all_stop"
|
|
** global variable to stop all other activity. Print the error message
|
|
** or print OK if the string "ok" is seen.
|
|
*/
|
|
int check_callback(void *pid, int argc, char **argv, char **notUsed2){
|
|
int id = (int)pid;
|
|
if( strcmp(argv[0],"ok") ){
|
|
all_stop = 1;
|
|
fprintf(stderr,"id: %s\n", id, argv[0]);
|
|
}else{
|
|
/* fprintf(stderr,"%d: OK\n", id); */
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
** Do an integrity check on the database. If the first integrity check
|
|
** fails, try it a second time.
|
|
*/
|
|
int integrity_check(sqlite *db, int id){
|
|
int rc;
|
|
if( all_stop ) return 0;
|
|
/* fprintf(stderr,"%d: CHECK\n", id); */
|
|
rc = sqlite3_exec(db, "pragma integrity_check", check_callback, 0, 0);
|
|
if( rc!=SQLITE_OK && rc!=SQLITE_BUSY ){
|
|
fprintf(stderr,"%d, Integrity check returns %d\n", id, rc);
|
|
}
|
|
if( all_stop ){
|
|
sqlite3_exec(db, "pragma integrity_check", check_callback, 0, 0);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
** This is the worker thread
|
|
*/
|
|
void *worker(void *workerArg){
|
|
sqlite *db;
|
|
int id = (int)workerArg;
|
|
int rc;
|
|
int cnt = 0;
|
|
fprintf(stderr, "Starting worker %d\n", id);
|
|
while( !all_stop && cnt++<10000 ){
|
|
if( cnt%100==0 ) printf("%d: %d\n", id, cnt);
|
|
while( (sqlite3_open(DB_FILE, &db))!=SQLITE_OK ) sched_yield();
|
|
sqlite3_exec(db, "PRAGMA synchronous=OFF", 0, 0, 0);
|
|
/* integrity_check(db, id); */
|
|
if( all_stop ){ sqlite3_close(db); break; }
|
|
/* fprintf(stderr, "%d: BEGIN\n", id); */
|
|
rc = sqlite3_exec(db, "INSERT INTO t1 VALUES('bogus data')", 0, 0, 0);
|
|
/* fprintf(stderr, "%d: END rc=%d\n", id, rc); */
|
|
sqlite3_close(db);
|
|
}
|
|
fprintf(stderr, "Worker %d finished\n", id);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
** Initialize the database and start the threads
|
|
*/
|
|
int main(int argc, char **argv){
|
|
sqlite *db;
|
|
int i, rc;
|
|
pthread_t aThread[5];
|
|
|
|
if( strcmp(DB_FILE,":memory:") ){
|
|
char *zJournal = sqlite3_mprintf("%s-journal", DB_FILE);
|
|
unlink(DB_FILE);
|
|
unlink(zJournal);
|
|
sqlite3_free(zJournal);
|
|
}
|
|
sqlite3_open(DB_FILE, &db);
|
|
if( db==0 ){
|
|
fprintf(stderr,"unable to initialize database\n");
|
|
exit(1);
|
|
}
|
|
rc = sqlite3_exec(db, "CREATE TABLE t1(x);", 0,0,0);
|
|
if( rc ){
|
|
fprintf(stderr,"cannot create table t1: %d\n", rc);
|
|
exit(1);
|
|
}
|
|
sqlite3_close(db);
|
|
for(i=0; i<sizeof(aThread)/sizeof(aThread[0]); i++){
|
|
pthread_create(&aThread[i], 0, worker, (void*)i);
|
|
}
|
|
for(i=0; i<sizeof(aThread)/sizeof(aThread[i]); i++){
|
|
pthread_join(aThread[i], 0);
|
|
}
|
|
if( !all_stop ){
|
|
printf("Everything seems ok.\n");
|
|
return 0;
|
|
}else{
|
|
printf("We hit an error.\n");
|
|
return 1;
|
|
}
|
|
}
|