/* -*- 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."

#include "test.h"
#include "cachetable-test.h"

bool foo;

//
// This test verifies that get_and_pin_nonblocking works and returns DB_TRYAGAIN when the PAIR is being used.
//

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 (verbose) { printf("FLUSH: %d\n", (int)k.b); }
  // this should not be flushed until the bottom of the test, which
  // verifies that this is called if we have it pending a checkpoint
  if (w) {
    assert(c);
    assert(keep);
  }
  //usleep (5*1024*1024);
}

static bool true_def_pf_req_callback(void* UU(ftnode_pv), void* UU(read_extraargs)) {
  return true;
}
static int true_def_pf_callback(void* UU(ftnode_pv), void* UU(dd), void* UU(read_extraargs), int UU(fd), PAIR_ATTR* sizep) {
    *sizep = make_pair_attr(8);
    return 0;
}


static void kibbutz_work(void *fe_v)
{
    CACHEFILE CAST_FROM_VOIDP(f1, fe_v);
    sleep(2);
    foo = true;
    int r = toku_test_cachetable_unpin(f1, make_blocknum(1), 1, CACHETABLE_CLEAN, make_pair_attr(8));
    assert(r==0);
    remove_background_job_from_cf(f1);    
}


static void
run_test (void) {
    const int test_limit = 12;
    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);
    create_dummy_functions(f1);
    
    void* v1;
    long s1;
    CACHETABLE_WRITE_CALLBACK wc = def_write_callback(NULL);
    wc.flush_callback = flush;
    //
    // test that if we are getting a PAIR for the first time that TOKUDB_TRY_AGAIN is returned
    // because the PAIR was not in the cachetable.
    //
    r = toku_cachetable_get_and_pin_nonblocking(f1, make_blocknum(1), 1, &v1, &s1, wc, def_fetch, def_pf_req_callback, def_pf_callback, PL_WRITE_EXPENSIVE, NULL, NULL);
    assert(r==TOKUDB_TRY_AGAIN);
    // now it should succeed
    r = toku_cachetable_get_and_pin_nonblocking(f1, make_blocknum(1), 1, &v1, &s1, wc, def_fetch, def_pf_req_callback, def_pf_callback, PL_WRITE_EXPENSIVE, NULL, NULL);
    assert(r==0);
    foo = false;
    cachefile_kibbutz_enq(f1, kibbutz_work, f1);
    // because node is in use, should return TOKUDB_TRY_AGAIN
    r = toku_cachetable_get_and_pin_nonblocking(f1, make_blocknum(1), 1, &v1, &s1, wc, def_fetch, def_pf_req_callback, def_pf_callback, PL_WRITE_EXPENSIVE, NULL, NULL);
    assert(r==TOKUDB_TRY_AGAIN);
    r = toku_cachetable_get_and_pin(f1, make_blocknum(1), 1, &v1, &s1, wc, def_fetch, def_pf_req_callback, def_pf_callback, true, NULL);
    assert(foo);
    r = toku_test_cachetable_unpin(f1, make_blocknum(1), 1, CACHETABLE_CLEAN, make_pair_attr(8)); assert(r==0);

    // now make sure we get TOKUDB_TRY_AGAIN when a partial fetch is involved
    // first make sure value is there
    r = toku_cachetable_get_and_pin_nonblocking(f1, make_blocknum(1), 1, &v1, &s1, wc, def_fetch, def_pf_req_callback, def_pf_callback, PL_WRITE_EXPENSIVE, NULL, NULL);
    assert(r==0);
    r = toku_test_cachetable_unpin(f1, make_blocknum(1), 1, CACHETABLE_CLEAN, make_pair_attr(8)); assert(r==0);
    // now make sure that we get TOKUDB_TRY_AGAIN for the partial fetch
    r = toku_cachetable_get_and_pin_nonblocking(f1, make_blocknum(1), 1, &v1, &s1, wc, def_fetch, true_def_pf_req_callback, true_def_pf_callback, PL_WRITE_EXPENSIVE, NULL, NULL);
    assert(r==TOKUDB_TRY_AGAIN);

    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);
  run_test();
  return 0;
}
