/* -*- 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."

#include "test.h"


static void
cachetable_unpin_test (int n) {
    const int test_limit = 2*n;
    int r;
    CACHETABLE ct;
    toku_cachetable_create(&ct, test_limit, ZERO_LSN, NULL_LOGGER);
    char fname1[] = __SRCFILE__ "test1.dat";
    unlink(fname1);
    CACHEFILE f1;
    r = toku_cachetable_openf(&f1, ct, fname1, O_RDWR|O_CREAT, S_IRWXU|S_IRWXG|S_IRWXO); assert(r == 0);

    int i;
    for (i=1; i<=n; i++) {
        uint32_t hi;
        CACHETABLE_WRITE_CALLBACK wc = def_write_callback(NULL);
        hi = toku_cachetable_hash(f1, make_blocknum(i));
        toku_cachetable_put(f1, make_blocknum(i), hi, (void *)(long)i, make_pair_attr(1), wc, put_callback_nop);
        assert(toku_cachefile_count_pinned(f1, 0) == i);

        void *v;
        r = toku_cachetable_maybe_get_and_pin(f1, make_blocknum(i), hi, PL_WRITE_EXPENSIVE, &v);
        assert(r == -1);
        assert(toku_cachefile_count_pinned(f1, 0) == i);

        //r = toku_test_cachetable_unpin(f1, make_blocknum(i), hi, CACHETABLE_CLEAN, 1);
        //assert(r == 0);
        assert(toku_cachefile_count_pinned(f1, 0) == i);
    }
    for (i=n; i>0; i--) {
        uint32_t hi;
        hi = toku_cachetable_hash(f1, make_blocknum(i));
        r = toku_test_cachetable_unpin(f1, make_blocknum(i), hi, CACHETABLE_CLEAN, make_pair_attr(1));
        assert(r == 0);
        assert(toku_cachefile_count_pinned(f1, 0) == i-1);
    }
    assert(toku_cachefile_count_pinned(f1, 1) == 0);
    toku_cachetable_verify(ct);

    toku_cachefile_close(&f1, false, ZERO_LSN);
    toku_cachetable_close(&ct);
}

enum unpin_evictor_test_type {
    unpin_increase,
    unpin_decrease,
    unpin_invalid_attr
};

static void
unpin_and_evictor_test(enum unpin_evictor_test_type test_type) {
    int r;
    CACHETABLE ct;
    int test_limit = 4;
    toku_cachetable_create(&ct, test_limit, ZERO_LSN, NULL_LOGGER);
    char fname1[] = __SRCFILE__ "test1.dat";
    unlink(fname1);
    CACHEFILE f1;
    
    r = toku_cachetable_openf(&f1, ct, fname1, O_RDWR|O_CREAT, S_IRWXU|S_IRWXG|S_IRWXO); assert(r == 0);
    evictor_test_helpers::set_hysteresis_limits(&ct->ev, test_limit, test_limit);
    evictor_test_helpers::disable_ev_thread(&ct->ev);

    void* value2;
    long size2;
    CACHETABLE_WRITE_CALLBACK wc = def_write_callback(NULL);
    // this should put in the cachetable a pair of size 8
    r = toku_cachetable_get_and_pin(
        f1,
        make_blocknum(1),
        1,
        &value2,
        &size2,
        wc, 
        def_fetch,
        def_pf_req_callback,
        def_pf_callback,
        true, 
        0
        );
    assert(r==0);
    //
    // now we unpin, 
    // if we increase the size, we should catch a sleep
    // if we don't increase the size, there should be no sleep
    // if we pass in an invalid pair_attr, there should be no sleep.
    //
    uint64_t old_num_ev_runs = 0;
    uint64_t new_num_ev_runs = 0;
    if (test_type == unpin_increase) {
        old_num_ev_runs = evictor_test_helpers::get_num_eviction_runs(&ct->ev);
        r = toku_test_cachetable_unpin(f1, make_blocknum(1), 1, CACHETABLE_DIRTY, make_pair_attr(9));
        new_num_ev_runs = evictor_test_helpers::get_num_eviction_runs(&ct->ev);
        assert(new_num_ev_runs > old_num_ev_runs);
    }
    else if (test_type == unpin_decrease || test_type == unpin_invalid_attr) {
        old_num_ev_runs = evictor_test_helpers::get_num_eviction_runs(&ct->ev);
        r = toku_test_cachetable_unpin(f1, make_blocknum(1), 1, CACHETABLE_DIRTY, make_pair_attr(8));
        new_num_ev_runs = evictor_test_helpers::get_num_eviction_runs(&ct->ev);
        assert(new_num_ev_runs == old_num_ev_runs);
    }
    else {
        assert(false);
    }

    toku_cachetable_verify(ct);
    toku_cachefile_close(&f1, false, ZERO_LSN);
    toku_cachetable_close(&ct);
}

int
test_main(int argc, const char *argv[]) {
    default_parse_args(argc, argv);
    cachetable_unpin_test(8);
    unpin_and_evictor_test(unpin_increase);
    unpin_and_evictor_test(unpin_decrease);
    unpin_and_evictor_test(unpin_invalid_attr);
    return 0;
}
