/* Find out about weak transactions. * User A does a transaction. * User B does somethign without a transaction, and it conflicts. */ #include <assert.h> #include <db.h> #include <stdlib.h> #include <string.h> #include <sys/stat.h> int main (int argc, char *argv[]) { DB_ENV *env; DB *db; int r; system("rm -rf " DIR); mkdir(DIR, 0777); r = db_env_create (&env, 0); assert(r==0); r = env->open(env, DIR, DB_CREATE | DB_INIT_MPOOL | DB_INIT_LOG | DB_INIT_TXN | DB_INIT_LOCK, 0777); assert(r==0); r = db_create(&db, env, 0); assert(r==0); r = db->open(db, 0, "numbers.db", 0, DB_BTREE, DB_CREATE | DB_AUTO_COMMIT, 0); assert(r==0); DB_TXN *x1, *x2; r = env->txn_begin(env, 0, &x1, 0); assert(r==0); r = env->txn_begin(env, 0, &x2, DB_TXN_NOWAIT); assert(r==0); DBT k1,k2,v1,v2; memset(&k1, 0, sizeof(DBT)); memset(&k2, 0, sizeof(DBT)); memset(&v1, 0, sizeof(DBT)); memset(&v2, 0, sizeof(DBT)); k2.data = k1.data = "hello"; k2.size = k1.size = 6; v1.data = "there"; v1.size = 6; r = db->put(db, x1, &k1, &v1, 0); assert(r==0); r = db->get(db, x2, &k2, &v2, 0); assert(r==DB_LOCK_DEADLOCK || r==DB_LOCK_NOTGRANTED); r = x1->commit(x1, 0); assert(r==0); r = x2->commit(x2, 0); assert(r==0); r = db->close(db, 0); assert(r==0); r = env->close(env, 0); assert(r==0); return 0; }