stasis-aries-wal/test/lladd/check_page.c

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---*/

#include <config.h>
#include <check.h>

#include "../../src/lladd/page.h"
#include <lladd/bufferManager.h>
#include <lladd/transactional.h>

#include "../../src/lladd/latches.h"
#include <sched.h>
#include <assert.h>
#include "../check_includes.h"



#define LOG_NAME   "check_page.log"

#define RECORD_SIZE sizeof(int)
/** @todo check_page needs to use loadPage, so it contains its own
    delcaration of loadPage. (Otherwise, loadPage would clutter the
    interface, which is especially bad, since we hide the Page struct
    ffrom the user for locking purposes.)*/
Page * loadPage(int pageid);

pthread_mutex_t random_mutex;

static lsn_t lsn;
static pthread_mutex_t lsn_mutex;
static void* worker_thread(void * arg_ptr) {
  Page * p = (Page*)arg_ptr;
  int i;
  lsn_t this_lsn;
  int j;
  int first = 1;
  recordid rid;
  for(i = 0; i < 10000; i++) {
    pthread_mutex_lock(&lsn_mutex);
    this_lsn = lsn;
    lsn++;
    pthread_mutex_unlock(&lsn_mutex);

    if(! first ) {
      /*      addPendingEvent(p); */
      pageReadRecord(1, p, rid, (byte*)&j);
      assert((j + 1) ==  i);
      pageDeRalloc(p, rid);
      sched_yield();
    } 
    
    first = 0;
    
    rid = pageRalloc(p, sizeof(int));
    /*    addPendingEvent(p); */
    pageWriteRecord(1, p, rid, lsn, (byte*)&i);
    sched_yield();

    assert(pageReadLSN(p) <= lsn);
  }
  
  return NULL;
}

/**
   @test 

   just run one the worker_thread function once to make sure that it passes
   without interference from other threads.

   The number of slots allocated by the page tests is too low to check
   that freed space is recovered.

   @todo While space is being reclaimed by page.c, it does not reclaim
   slots, so freeing records still does not work properly.

*/
START_TEST(pageNoThreadTest)
{
  Page * p;
  /*    p->id = 0;*/


  pthread_mutex_init(&lsn_mutex, NULL);

  Tinit();

  p = loadPage(0);

  worker_thread(p);

  unlock(p->loadlatch);

  Tdeinit();

}
END_TEST

/** 
    Check the page implementation in the multi-threaded case.
*/
START_TEST(pageThreadTest) {

#define  THREAD_COUNT 10
  pthread_t workers[THREAD_COUNT];
  int i;
  pthread_mutex_init(&random_mutex, NULL);
  pthread_mutex_init(&lsn_mutex, NULL);

  fail_unless(1, NULL);
  Tinit();
  Tdeinit();
  Tinit();
  fail_unless(1, NULL);

  Page * p = loadPage(1);
  fail_unless(1, NULL);

  for(i = 0; i < THREAD_COUNT; i++) {
    pthread_create(&workers[i], NULL, worker_thread, p);
  }
  fail_unless(1, NULL);

  for(i = 0; i < THREAD_COUNT; i++) {
    pthread_join(workers[i], NULL);
  }

  unlock(p->loadlatch);

  Tdeinit();

} END_TEST


Suite * check_suite(void) {
  Suite *s = suite_create("page");
  /* Begin a new test */
  TCase *tc = tcase_create("pagethreads");

  /* Sub tests are added, one per line, here */

  tcase_add_test(tc, pageNoThreadTest);
  tcase_add_test(tc, pageThreadTest); 

  /* --------------------------------------------- */
  
  tcase_add_checked_fixture(tc, setup, teardown);

  suite_add_tcase(s, tc);
  return s;
}

#include "../check_setup.h"