/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:
#ident "$Id$"
/*
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  This program is free software; you can redistribute it and/or modify
  it under the terms of version 2 of the GNU General Public License as
  published by the Free Software Foundation, and provided that the
  following conditions are met:

      * Redistributions of source code must retain this COPYING
        CONDITIONS NOTICE, the COPYRIGHT NOTICE (below), the
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      * Redistributions in binary form must reproduce this COPYING
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        GRANT (below) in the documentation and/or other materials
        provided with the distribution.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  02110-1335  USA.

COPYRIGHT NOTICE:

  TokuFT, Tokutek Fractal Tree Indexing Library.
  Copyright (C) 2007-2013 Tokutek, Inc.

DISCLAIMER:

  This program is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  General Public License for more details.

UNIVERSITY PATENT NOTICE:

  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.

PATENT MARKING NOTICE:

  This software is covered by US Patent No. 8,185,551.
  This software is covered by US Patent No. 8,489,638.

PATENT RIGHTS GRANT:

  "THIS IMPLEMENTATION" means the copyrightable works distributed by
  Tokutek as part of the Fractal Tree project.

  "PATENT CLAIMS" means the claims of patents that are owned or
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  the absence of this license would be infringed by THIS
  IMPLEMENTATION or by using or running THIS IMPLEMENTATION.

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  IMPLEMENTATION.  If you or your agent or licensee institute or order
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  THIS IMPLEMENTATION constitutes direct or contributory patent
  infringement, or inducement of patent infringement, then any rights
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  licensee institute or order or agree to the institution of a PATENT
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*/

#ident "Copyright (c) 2007-2013 Tokutek Inc.  All rights reserved."

#include "test.h"

int num_entries;
bool flush_may_occur;
int expected_flushed_key;
bool check_flush;


//
// This test verifies that if partial eviction is expensive and
// does not estimate number of freed bytes to be greater than 0,
// then partial eviction is not called, and normal eviction
// is used. The verification is done ia an assert(false) in 
// pe_callback.
//


static void
flush (CACHEFILE f __attribute__((__unused__)),
       int UU(fd),
       CACHEKEY k  __attribute__((__unused__)),
       void *v     __attribute__((__unused__)),
       void** UU(dd),
       void *e     __attribute__((__unused__)),
       PAIR_ATTR s      __attribute__((__unused__)),
       PAIR_ATTR* new_size      __attribute__((__unused__)),
       bool w      __attribute__((__unused__)),
       bool keep   __attribute__((__unused__)),
       bool c      __attribute__((__unused__)),
        bool UU(is_clone)
       ) {
    /* Do nothing */
    if (check_flush && !keep) {
        if (verbose) { printf("FLUSH: %d write_me %d\n", (int)k.b, w); }
        assert(flush_may_occur);
        assert(!w);
        assert(expected_flushed_key == (int)k.b);
        expected_flushed_key--;
    }
}

static int
fetch (CACHEFILE f        __attribute__((__unused__)),
       PAIR UU(p),
       int UU(fd),
       CACHEKEY k         __attribute__((__unused__)),
       uint32_t fullhash __attribute__((__unused__)),
       void **value       __attribute__((__unused__)),
       void** UU(dd),
       PAIR_ATTR *sizep        __attribute__((__unused__)),
       int  *dirtyp,
       void *extraargs    __attribute__((__unused__))
       ) {
    *dirtyp = 0;
    *value = NULL;
    *sizep = make_pair_attr(1);
    return 0;
}

static void 
pe_est_callback(
    void* UU(ftnode_pv),
    void* UU(dd), 
    long* bytes_freed_estimate, 
    enum partial_eviction_cost *cost, 
    void* UU(write_extraargs)
    )
{
    *bytes_freed_estimate = 0;
    *cost = PE_EXPENSIVE;
}

static int 
pe_callback (
    void *ftnode_pv __attribute__((__unused__)), 
    PAIR_ATTR bytes_to_free __attribute__((__unused__)), 
    void* extraargs __attribute__((__unused__)),
    void (*finalize)(PAIR_ATTR bytes_freed, void *extra),
    void *finalize_extra
    ) 
{
    assert(false);
    finalize(bytes_to_free, finalize_extra);
    return 0;
}


static void
cachetable_test (void) {
    const int test_limit = 4;
    num_entries = 0;
    int r;
    CACHETABLE ct;
    toku_cachetable_create(&ct, test_limit, ZERO_LSN, nullptr);
    const char *fname1 = TOKU_TEST_FILENAME;
    unlink(fname1);
    CACHEFILE f1;
    r = toku_cachetable_openf(&f1, ct, fname1, O_RDWR|O_CREAT, S_IRWXU|S_IRWXG|S_IRWXO); assert(r == 0);

    void* v1;
    void* v2;
    long s1, s2;
    flush_may_occur = false;
    check_flush = true;
    CACHETABLE_WRITE_CALLBACK wc = def_write_callback(NULL);
    wc.flush_callback = flush;
    wc.pe_est_callback = pe_est_callback;
    wc.pe_callback = pe_callback;
    for (int i = 0; i < 100000; i++) {
      r = toku_cachetable_get_and_pin(f1, make_blocknum(1), 1, &v1, &s1, wc, fetch, def_pf_req_callback, def_pf_callback, true, NULL);
        r = toku_test_cachetable_unpin(f1, make_blocknum(1), 1, CACHETABLE_CLEAN, make_pair_attr(1));
    }
    for (int i = 0; i < 8; i++) {
      r = toku_cachetable_get_and_pin(f1, make_blocknum(2), 2, &v2, &s2, wc, fetch, def_pf_req_callback, def_pf_callback, true, NULL);
        r = toku_test_cachetable_unpin(f1, make_blocknum(2), 2, CACHETABLE_CLEAN, make_pair_attr(1));
    }
    for (int i = 0; i < 4; i++) {
      r = toku_cachetable_get_and_pin(f1, make_blocknum(3), 3, &v2, &s2, wc, fetch, def_pf_req_callback, def_pf_callback, true, NULL);
        r = toku_test_cachetable_unpin(f1, make_blocknum(3), 3, CACHETABLE_CLEAN, make_pair_attr(1));
    }
    for (int i = 0; i < 2; i++) {
      r = toku_cachetable_get_and_pin(f1, make_blocknum(4), 4, &v2, &s2, wc, fetch, def_pf_req_callback, def_pf_callback, true, NULL);
        r = toku_test_cachetable_unpin(f1, make_blocknum(4), 4, CACHETABLE_CLEAN, make_pair_attr(1));
    }
    flush_may_occur = true;
    expected_flushed_key = 4;
    toku_cachetable_put(f1, make_blocknum(5), 5, NULL, make_pair_attr(4), wc, put_callback_nop);
    flush_may_occur = true;
    expected_flushed_key = 5;
    r = toku_test_cachetable_unpin(f1, make_blocknum(5), 5, CACHETABLE_CLEAN, make_pair_attr(4));

    check_flush = false;
    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_test();
    return 0;
}