/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:
#ident "$Id$"
#ident "Copyright (c) 2007-2012 Tokutek Inc.  All rights reserved."
#ident "The technology is licensed by the Massachusetts Institute of Technology, Rutgers State University of New Jersey, and the Research Foundation of State University of New York at Stony Brook under United States of America Serial No. 11/760379 and to the patents and/or patent applications resulting from it."
// test that an update calls back into the update function

#include "test.h"
#include "toku_pthread.h"

const int envflags = DB_INIT_MPOOL|DB_CREATE|DB_THREAD |DB_INIT_LOCK|DB_INIT_LOG|DB_INIT_TXN|DB_PRIVATE;

DB_ENV *env;


static void checkpoint_callback_1(void * extra) {
    assert(extra == NULL);
    usleep(10*1024*1024);
}

static void *run_checkpoint(void *arg) {
    int r = env->txn_checkpoint(env, 0, 0, 0);
    assert_zero(r);
    return arg;
}

static uint64_t tdelta_usec(struct timeval *tend, struct timeval *tstart) {
    uint64_t t = tend->tv_sec * 1000000 + tend->tv_usec;
    t -= tstart->tv_sec * 1000000 + tstart->tv_usec;
    return t;
}

static void setup (void) {
    toku_os_recursive_delete(TOKU_TEST_FILENAME);
    { int chk_r = toku_os_mkdir(TOKU_TEST_FILENAME, S_IRWXU+S_IRWXG+S_IRWXO); CKERR(chk_r); }
    { int chk_r = db_env_create(&env, 0); CKERR(chk_r); }
    db_env_set_checkpoint_callback(checkpoint_callback_1, NULL);
    env->set_errfile(env, stderr);
    { int chk_r = env->open(env, TOKU_TEST_FILENAME, envflags, S_IRWXU+S_IRWXG+S_IRWXO); CKERR(chk_r); }
}

static void cleanup (void) {
    { int chk_r = env->close(env, 0); CKERR(chk_r); }
}

static void run_test(void) {
    DB* db = NULL;
    
    IN_TXN_COMMIT(env, NULL, txn_create, 0, {
            { int chk_r = db_create(&db, env, 0); CKERR(chk_r); }
            { int chk_r = db->open(db, txn_create, "foo.db", NULL, DB_BTREE, DB_CREATE, 0666); CKERR(chk_r); }
        });
    DBT key, val;
    int i = 0;
    int v = 0;
    dbt_init(&key, &i, sizeof(i));
    dbt_init(&val, &v, sizeof(v));
    // put a value to make it dirty, just to make sure that checkpoint
    // will do something
    { int chk_r = db->put(db, NULL, &key, &val, 0); CKERR(chk_r); }

    // at this point, we have a db that is dirty. Now we want to do the following
    // have two threads each start a checkpoint
    // then have a third thread try to create a txn, do a write, 
    // and commit the txn. In 5.2.3, the commit of the txn would block
    // until the one of the checkpoints complete (which should take 10 seconds)
    // With the fix, the commit should return immedietely
    toku_pthread_t chkpt1_tid;
    toku_pthread_t chkpt2_tid;

    
    { int chk_r = toku_pthread_create(&chkpt1_tid, NULL, run_checkpoint, NULL); CKERR(chk_r); } 
    { int chk_r = toku_pthread_create(&chkpt2_tid, NULL, run_checkpoint, NULL); CKERR(chk_r); } 
    usleep(2*1024*1024);
    struct timeval tstart;
    gettimeofday(&tstart, NULL);
    DB_TXN *txn = NULL;
    { int chk_r = env->txn_begin(env, NULL, &txn, 0); CKERR(chk_r); }
    i = 1; v = 1;
    { int chk_r = db->put(db, txn, &key, &val, 0); CKERR(chk_r); }
    { int chk_r = txn->commit(txn, 0); CKERR(chk_r); }
    
    struct timeval tend; 
    gettimeofday(&tend, NULL);
    uint64_t diff = tdelta_usec(&tend, &tstart);
    assert(diff < 5*1024*1024); 


    void *ret;
    { int chk_r = toku_pthread_join(chkpt2_tid, &ret); CKERR(chk_r); } 
    { int chk_r = toku_pthread_join(chkpt1_tid, &ret); CKERR(chk_r); } 

    { int chk_r = db->close(db,0); CKERR(chk_r); }
    db = NULL;
}

int test_main (int argc, char * const argv[]) {
    parse_args(argc, argv);
    setup();
    run_test();
    cleanup();
    return 0;
}
