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#include <pthread.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sqlite3.h>
#include "coz.h"
#define THREAD_COUNT 64
#define INSERTIONS_PER_THREAD 10000
void* thread_fn(void* arg) {
int id = (int)(intptr_t)arg;
int rc;
sqlite3* db;
char* err;
if(sqlite3_open(":memory:", &db)) {
fprintf(stderr, "Can't open database: %s\n", sqlite3_errmsg(db));
sqlite3_close(db);
return NULL;
}
sqlite3_exec(db, "PRAGMA synchronous=OFF", NULL, NULL, &err);
sqlite3_exec(db, "PRAGMA journal_mode=MEMORY", NULL, NULL, &err);
char buf[512];
sprintf(buf, "DROP TABLE IF EXISTS tab%d", id);
do {
rc = sqlite3_exec(db, buf, NULL, NULL, &err);
} while(rc == SQLITE_BUSY);
if(rc) {
printf("Error: %s\n", err);
abort();
}
sprintf(buf, "CREATE TABLE tab%d(id INTEGER PRIMARY KEY, x INTEGER, y INTEGER, z TEXT)", id);
do {
rc = sqlite3_exec(db, buf, NULL, NULL, &err);
} while(rc == SQLITE_BUSY);
if(rc) {
printf("Error: %s\n", err);
abort();
}
sprintf(buf, "INSERT INTO tab%d VALUES(?1, ?2, ?3, ?4)", id);
sqlite3_stmt* stmt;
sqlite3_prepare_v2(db, buf, strlen(buf), &stmt, NULL);
for (int i=0; i<INSERTIONS_PER_THREAD; i++) {
sqlite3_exec(db, "BEGIN TRANSACTION", NULL, NULL, &err);
sqlite3_bind_int(stmt, 1, i + id*INSERTIONS_PER_THREAD);
sqlite3_bind_int(stmt, 2, 2*i);
sqlite3_bind_int(stmt, 3, 3*i);
sqlite3_bind_text(stmt, 4, "asdf", 4, SQLITE_STATIC);
do {
rc = sqlite3_step(stmt);
} while(rc == SQLITE_BUSY);
if(rc != SQLITE_DONE) {
printf("Commit Failed!\n%s\n", sqlite3_errmsg(db));
abort();
}
sqlite3_exec(db, "COMMIT TRANSACTION", NULL, NULL, &err);
COZ_PROGRESS;
sqlite3_reset(stmt);
}
sqlite3_finalize(stmt);
sprintf(buf, "DROP TABLE tab%d", id);
sqlite3_exec(db, buf, NULL, NULL, &err);
sqlite3_close(db);
return NULL;
}
int main(int argc, char **argv){
if(sqlite3_threadsafe() != 2) {
printf("SQLite is not thread safe. What happened?\n");
return 1;
}
sqlite3_enable_shared_cache(0);
pthread_t threads[THREAD_COUNT];
for(uintptr_t i=0; i<THREAD_COUNT; i++) {
pthread_create(&threads[i], NULL, thread_fn, (void*)i);
}
for(int i=0; i<THREAD_COUNT; i++) {
pthread_join(threads[i], NULL);
}
return 0;
}
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