#if 0
make -f Makefile -f - testSuperPool <<'_eof_'
testSuperPool: testSuperPool.cpp libkernel.a LinearPool.hpp
	$(CXXCOMPILE) -o $@ $@.cpp libkernel.a -L../../common/util/.libs -lgeneral
_eof_
exit $?
#endif

/*
   Copyright (C) 2005, 2006 MySQL AB
    All rights reserved. Use is subject to license terms.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.

   This program is also distributed with certain software (including
   but not limited to OpenSSL) that is licensed under separate terms,
   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
   permission to link the program and your derivative works with the
   separately licensed software that they have included with MySQL.

   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, version 2.0, for more details.

   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 St, Fifth Floor, Boston, MA 02110-1301  USA
*/

#include "SuperPool.hpp"
#include "LinearPool.hpp"
#include <NdbOut.hpp>

template <Uint32 sz>
struct A {
  Uint32 a[sz];
  void fill() {
    Uint32 c = 0;
    for (Uint32 i = 0; i + 1 < sz; i++) {
      a[i] = random();
      c = (c << 1) ^ a[i];
    }
    a[sz - 1] = c;
  }
  void check() {
    Uint32 c = 0;
    for (Uint32 i = 0; i + 1 < sz; i++) {
      c = (c << 1) ^ a[i];
    }
    assert(a[sz - 1] == c);
  }
};

static Uint32
urandom(Uint32 n)
{
  return (Uint32)random() % n;
}

static Uint32
random_coprime(Uint32 n)
{
  Uint32 prime[] = { 101, 211, 307, 401, 503, 601, 701, 809, 907 };
  Uint32 count = sizeof(prime) / sizeof(prime[0]);
  assert(n != 0);
  while (1) {
    Uint32 i = urandom(count);
    if (n % prime[i] != 0)
      return prime[i];
  }
}

static int
cmpPtrI(const void* a, const void* b)
{
  Ptr<const void> u = *(Ptr<const void>*)a;
  Ptr<const void> v = *(Ptr<const void>*)b;
  return u.i < v.i ? -1 : u.i > v.i ? +1 : 0;
}

static int
cmpPtrP(const void* a, const void* b)
{
  Ptr<const void> u = *(Ptr<const void>*)a;
  Ptr<const void> v = *(Ptr<const void>*)b;
  return u.p < v.p ? -1 : u.p > v.p ? +1 : 0;
}

static Uint32 loopcount = 3;

template <class T>
static void
sp_test(GroupPool& gp)
{
  SuperPool& sp = gp.m_superPool;
  RecordPool<T> rp(gp);
  assert(gp.m_totPages == gp.m_freeList.m_pageCount);
  SuperPool::RecInfo& ri = rp.m_recInfo;
  Uint32 pageCount = sp.m_totPages;
  Uint32 perPage = rp.m_recInfo.m_maxPerPage;
  Uint32 perPool = perPage * pageCount;
  ndbout << "pages=" << pageCount << " perpage=" << perPage << " perpool=" << perPool << endl;
  Ptr<T>* ptrList = new Ptr<T> [perPool];
  memset(ptrList, 0x1f, perPool * sizeof(Ptr<T>));
  Uint32 verify = 1000;
  Uint32 useCount;
  Uint32 loop;
  for (loop = 0; loop < loopcount; loop++) {
    ndbout << "loop " << loop << endl;
    Uint32 i, j;
    // seize all
    ndbout << "seize all" << endl;
    for (i = 0; i < perPool + 1; i++) {
      if (verify == 0 || urandom(perPool) < verify)
        sp.verify(ri);
      j = i;
      Ptr<T> ptr1 = { 0, RNIL };
      if (! rp.seize(ptr1))
        break;
      ptr1.p->fill();
      ptr1.p->check();
      Ptr<T> ptr2 = { 0, ptr1.i };
      rp.getPtr(ptr2);
      assert(ptr1.i == ptr2.i && ptr1.p == ptr2.p);
      ptrList[j] = ptr1;
    }
    sp.verify(ri);
    ndbout << "seized " << i << endl;
    assert(i == perPool);
    useCount = sp.getRecUseCount(ri);
    assert(useCount == perPool);
    // check duplicates
    ndbout << "check dups" << endl;
    {
      Ptr<T>* ptrList2 = new Ptr<T> [perPool];
      memcpy(ptrList2, ptrList, perPool * sizeof(Ptr<T>));
      qsort(ptrList2, perPool, sizeof(Ptr<T>), cmpPtrI);
      for (i = 1; i < perPool; i++)
        assert(ptrList2[i - 1].i != ptrList2[i].i);
      qsort(ptrList2, perPool, sizeof(Ptr<T>), cmpPtrP);
      for (i = 1; i < perPool; i++)
        assert(ptrList2[i - 1].p != ptrList2[i].p);
      delete [] ptrList2;
    }
    // release all in various orders
    ndbout << "release all" << endl;
    Uint32 coprime = random_coprime(perPool);
    for (i = 0; i < perPool; i++) {
      if (verify == 0 || urandom(perPool) < verify)
        sp.verify(ri);
      switch (loop % 3) {
      case 0:   // ascending
        j = i;
        break;
      case 1:   // descending
        j = perPool - 1 - i;
        break;
      case 2:   // pseudo-random
        j = (coprime * i) % perPool;
        break;
      }
      Ptr<T>& ptr = ptrList[j];
      assert(ptr.i != RNIL && ptr.p != 0);
      ptr.p->check();
      rp.release(ptr);
      assert(ptr.i == RNIL && ptr.p == 0);
    }
    sp.verify(ri);
    useCount = sp.getRecUseCount(ri);
    assert(useCount == 0);
    // seize/release at random
    ndbout << "seize/release at random" << endl;
    for (i = 0; i < loopcount * perPool; i++) {
      if (verify == 0 || urandom(perPool) < verify)
        sp.verify(ri);
      j = urandom(perPool);
      Ptr<T>& ptr = ptrList[j];
      if (ptr.i == RNIL) {
        if (rp.seize(ptr))
          ptr.p->fill();
      } else {
        ptr.p->check();
        rp.release(ptr);
      }
    }
    ndbout << "used " << ri.m_useCount << endl;
    sp.verify(ri);
    // release all
    ndbout << "release all" << endl;
    for (i = 0; i < perPool; i++) {
      if (verify == 0 || urandom(perPool) < verify)
        sp.verify(ri);
      j = i;
      Ptr<T>& ptr = ptrList[j];
      if (ptr.i != RNIL) {
        ptr.p->check();
        rp.release(ptr);
      }
    }
    sp.verify(ri);
    useCount = sp.getRecUseCount(ri);
    assert(useCount == 0);
  }
  // done
  delete [] ptrList;
}

template <class T>
static void
lp_test(GroupPool& gp)
{
  SuperPool& sp = gp.m_superPool;
  LinearPool<T, 5> lp(gp);
  ndbout << "linear pool test" << endl;
  Ptr<T> ptr;
  Uint32 loop;
  for (loop = 0; loop < loopcount; loop++) {
    int count = 0;
    while (1) {
      bool ret = lp.seize(ptr);
      lp.verify();
      if (! ret)
        break;
      assert(ptr.i == count);
      Ptr<T> ptr2;
      ptr2.i = ptr.i;
      ptr2.p = 0;
      lp.getPtr(ptr2);
      assert(ptr.p == ptr2.p);
      count++;
    }
    assert(count != 0);
    ndbout << "seized " << count << endl;
    switch (loop % 3) {
    case 0:
      {
        int n = 0;
        while (n < count) {
          ptr.i = n;
          lp.release(ptr);
          lp.verify();
          n++;
        }
        ndbout << "released in order" << endl;
      }
      break;
    case 1:
      {
        int n = count;
        while (n > 0) {
          n--;
          ptr.i = n;
          lp.release(ptr);
          lp.verify();
        }
        ndbout << "released in reverse" << endl;
      }
      break;
    default:
      {
        int coprime = random_coprime(count);
        int n = 0;
        while (n < count) {
          int m = (coprime * n) % count;
          ptr.i = m;
          lp.release(ptr);
          lp.verify();
          n++;
        }
        ndbout << "released at random" << endl;
      }
      break;
    }
    { Uint32 cnt = lp.count(); assert(cnt == 0); }
    // seize_index test
    char *used = new char [10 * count];
    memset(used, false, sizeof(used));
    Uint32 i, ns = 0, nr = 0;
    for (i = 0; i < count; i++) {
      Uint32 index = urandom(10 * count);
      if (used[index]) {
        ptr.i = index;
        lp.release(ptr);
        lp.verify();
        nr++;
      } else {
        int i = lp.seize_index(ptr, index);
        assert(i >= 0);
        lp.verify();
        if (i == 0) // no space
          continue;
        assert(ptr.i == index);
        Ptr<T> ptr2;
        ptr2.i = ptr.i;
        ptr2.p = 0;
        lp.getPtr(ptr2);
        assert(ptr.p == ptr2.p);
        ns++;
      }
      used[index] = ! used[index];
    }
    ndbout << "random sparse seize " << ns << " release " << nr << endl;
    nr = 0;
    for (i = 0; i < 10 * count; i++) {
      if (used[i]) {
        ptr.i = i;
        lp.release(ptr);
        lp.verify();
        used[i] = false;
        nr++;
      }
    }
    ndbout << "released " << nr << endl;
    { Uint32 cnt = lp.count(); assert(cnt == 0); }
  }
}

static Uint32 pageSize = 32768;
static Uint32 pageBits = 17;

const Uint32 sz1 = 3;
const Uint32 sz2 = 4;
const Uint32 sz3 = 53;
const Uint32 sz4 = 424;
const Uint32 sz5 = 5353;

typedef A<sz1> T1;
typedef A<sz2> T2;
typedef A<sz3> T3;
typedef A<sz4> T4;
typedef A<sz5> T5;

template static void sp_test<T1>(GroupPool& sp);
template static void sp_test<T2>(GroupPool& sp);
template static void sp_test<T3>(GroupPool& sp);
template static void sp_test<T4>(GroupPool& sp);
template static void sp_test<T5>(GroupPool& sp);
//
template static void lp_test<T3>(GroupPool& sp);

int
main(int argc, char** argv)
{
  if (argc > 1 && strncmp(argv[1], "-l", 2) == 0)
    loopcount = atoi(argv[1] + 2);
  HeapPool sp(pageSize, pageBits);
  sp.setInitPages(7);
  sp.setMaxPages(7);
  if (! sp.allocMemory())
    assert(false);
  GroupPool gp(sp);
  Uint16 s = (Uint16)getpid();
  srandom(s);
  ndbout << "rand " << s << endl;
  int count;
  count = 0;
  while (++count <= 0) { // change to 1 to find new bug
    sp_test<T1>(gp);
    sp_test<T2>(gp);
    sp_test<T3>(gp);
    sp_test<T4>(gp);
    sp_test<T5>(gp);
  }
  count = 0;
  while (++count <= 1) {
    lp_test<T3>(gp);
  }
  return 0;
}
