/*
   Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved.

   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 "DynArr256.hpp"
#include <stdio.h>
#include <assert.h>
#include <NdbOut.hpp>

#define DA256_BITS  5
#define DA256_MASK 31

struct DA256CL
{
  Uint32 m_magic;
  Uint32 m_data[15];
};

struct DA256Free
{
  Uint32 m_magic;
  Uint32 m_next_free;
};

struct DA256Node
{
  struct DA256CL m_lines[17];
};

struct DA256Page
{
  struct DA256CL m_header[2];
  struct DA256Node m_nodes[30];
};

#undef require
#define require(x) require_exit_or_core_with_printer((x), 0, ndbout_printer)
//#define DA256_USE_PX
//#define DA256_USE_PREFETCH
#define DA256_EXTRA_SAFE


#ifdef UNIT_TEST
#ifdef USE_CALLGRIND
#include <valgrind/callgrind.h>
#else
#define CALLGRIND_TOGGLE_COLLECT()
#endif
Uint32 allocatedpages = 0;
Uint32 allocatednodes = 0;
Uint32 releasednodes = 0;
#endif

inline
void
require_impl(bool x, int line)
{
  if (!x)
  {
    ndbout_c("LINE: %d", line);
    abort();
  }
}

DynArr256Pool::DynArr256Pool()
{
  m_type_id = RNIL;
  m_first_free = RNIL;
  m_memroot = 0;
}

void
DynArr256Pool::init(Uint32 type_id, const Pool_context & pc)
{
  init(0, type_id, pc);
}

void
DynArr256Pool::init(NdbMutex* m, Uint32 type_id, const Pool_context & pc)
{
  m_ctx = pc;
  m_type_id = type_id;
  m_memroot = (DA256Page*)m_ctx.get_memroot();
  m_mutex = m;
}

static const Uint32 g_max_sizes[5] = { 0, 256, 65536, 16777216, ~0 };

/**
 * sz = 0     =     1 - 0 level
 * sz = 1     = 256^1 - 1 level
 * sz = 2     = 256^2 - 2 level
 * sz = 3     = 256^3 - 3 level
 * sz = 4     = 256^4 - 4 level
 */
Uint32 *
DynArr256::get(Uint32 pos) const
{
  Uint32 sz = m_head.m_sz;
  Uint32 ptrI = m_head.m_ptr_i;
  DA256Page * memroot = m_pool.m_memroot;
  Uint32 type_id = (~m_pool.m_type_id) & 0xFFFF;
  
  if (unlikely(pos >= g_max_sizes[sz]))
  {
    return 0;
  }
  
#ifdef DA256_USE_PX
  Uint32 px[4] = { (pos >> 24) & 255, 
		   (pos >> 16) & 255, 
		   (pos >> 8)  & 255,
		   (pos >> 0)  & 255 };
#endif

  Uint32* retVal = &m_head.m_ptr_i;
  for(; sz --;)
  {
    if (unlikely(ptrI == RNIL))
    {
      return 0;
    }
#ifdef DA256_USE_PX
    Uint32 p0 = px[sz];
#else
    Uint32 shr = sz << 3;
    Uint32 p0 = (pos >> shr) & 255;
#endif
    Uint32 page_no = ptrI >> DA256_BITS;
    Uint32 page_idx = ptrI & DA256_MASK;
    DA256Page * page = memroot + page_no;
    
    Uint32 *magic_ptr, p;
    if (p0 != 255)
    {
      Uint32 line = ((p0 << 8) + (p0 << 4) + p0 + 255) >> 12;
      Uint32 * ptr = (Uint32*)(page->m_nodes + page_idx);
      
      p = 0;
      retVal = (ptr + 1 + p0 + line);
      magic_ptr =(ptr + (p0 & ~15));
    }
    else
    {
      Uint32 b = (page_idx + 1) >> 4;
      Uint32 * ptr = (Uint32*)(page->m_header+b);
      
      p = page_idx - (b << 4) + b;
      retVal = (ptr + 1 + p);
      magic_ptr = ptr;
    }
    
    ptrI = *retVal;
    Uint32 magic = *magic_ptr;
    
    if (unlikely(! ((magic & (1 << p)) && (magic >> 16) == type_id)))
      goto err;
  }
  
  return retVal;
err:
  require(false);
  return 0;
}

Uint32 *
DynArr256::set(Uint32 pos)
{
  Uint32 sz = m_head.m_sz;
  Uint32 type_id = (~m_pool.m_type_id) & 0xFFFF;  
  DA256Page * memroot = m_pool.m_memroot;
  
  if (unlikely(pos >= g_max_sizes[sz]))
  {
    if (unlikely(!expand(pos)))
    {
      return 0;
    }
    sz = m_head.m_sz;
  }
  
#ifdef DA256_USE_PX  
  Uint32 px[4] = { (pos >> 24) & 255, 
		   (pos >> 16) & 255, 
		   (pos >> 8)  & 255,
		   (pos >> 0)  & 255 };
#endif

  Uint32 ptrI = m_head.m_ptr_i;
  Uint32 *retVal = &m_head.m_ptr_i;
  for(; sz --;)
  {
#ifdef DA256_USE_PX
    Uint32 p0 = px[sz];
#else
    Uint32 shr = sz << 3;
    Uint32 p0 = (pos >> shr) & 255;
#endif
    if (ptrI == RNIL)
    {
      if (unlikely((ptrI = m_pool.seize()) == RNIL))
      {
	return 0;
      }
      * retVal = ptrI;
    }
    
    Uint32 page_no = ptrI >> DA256_BITS;
    Uint32 page_idx = ptrI & DA256_MASK;
    DA256Page * page = memroot + page_no;
    
    Uint32 *magic_ptr, p;
    if (p0 != 255)
    {
      Uint32 line = ((p0 << 8) + (p0 << 4) + p0 + 255) >> 12;
      Uint32 * ptr = (Uint32*)(page->m_nodes + page_idx);

      p = 0;
      magic_ptr = (ptr + (p0 & ~15));
      retVal = (ptr + 1 + p0 + line);
    }
    else
    {
      Uint32 b = (page_idx + 1) >> 4;
      Uint32 * ptr = (Uint32*)(page->m_header+b);
      
      p = page_idx - (b << 4) + b;
      magic_ptr = ptr;
      retVal = (ptr + 1 + p);
    }
     
    ptrI = * retVal;
    Uint32 magic = *magic_ptr;

    if (unlikely(! ((magic & (1 << p)) && (magic >> 16) == type_id)))
      goto err;
  } 
  
  return retVal;
  
err:
  require(false);
  return 0;
}

static
inline
void
initpage(DA256Page* p, Uint32 page_no, Uint32 type_id)
{
  Uint32 i, j;
#ifdef DA256_USE_PREFETCH
#if defined(__GNUC__) && !(__GNUC__ == 2 && __GNUC_MINOR__ < 96)
#ifdef DA256_EXTRA_SAFE
  for (i = 0; i<(30 * 17 + 2); i++)
  {
    __builtin_prefetch (p->m_header + i, 1);    
  }
#else
  {
    __builtin_prefetch (p->m_header + 0, 1);    
    __builtin_prefetch (p->m_header + 1, 1);    
    for (i = 0; i<30; i++)
    {
      __builtin_prefetch (p->m_nodes + i, 1);
    }
  }
#endif
#endif
#endif
  DA256CL* cl;
  for  (i = 0; i<2; i++)
  {
    cl = p->m_header + i;
    cl->m_magic = (~type_id << 16);
  }
  
  DA256Free* free;
  
  for (i = 0; i<30; i++)
  {
    free = (DA256Free*)(p->m_nodes+i);
    free->m_magic = type_id;
    free->m_next_free = (page_no << DA256_BITS) + (i + 1);
#ifdef DA256_EXTRA_SAFE
    DA256Node* node = p->m_nodes+i;
    for (j = 0; j<17; j++)
      node->m_lines[j].m_magic = type_id;
#endif
  }
  
  free = (DA256Free*)(p->m_nodes+29);
  free->m_next_free = RNIL;
}

bool
DynArr256::expand(Uint32 pos)
{
  Uint32 i;
  Uint32 idx = 0;
  Uint32 alloc[5];
  Uint32 sz = m_head.m_sz;

  for (; pos >= g_max_sizes[sz]; sz++);

  if (m_head.m_sz == 0)
  {
    m_head.m_sz = sz;
    return true;
  }

  sz =  m_head.m_sz;
  for (; pos >= g_max_sizes[sz]; sz++)
  {
    Uint32 ptrI = m_pool.seize();
    if (unlikely(ptrI == RNIL))
      goto err;
    alloc[idx++] = ptrI;
  }
  
  alloc[idx] = m_head.m_ptr_i;
  m_head.m_sz = 1;
  for (i = 0; i<idx; i++)
  {
    m_head.m_ptr_i = alloc[i];
    Uint32 * ptr = get(0);
    * ptr = alloc[i + 1];
  }

  m_head.m_sz = sz;
  m_head.m_ptr_i = alloc[0];
  
  return true;
  
err:
  for (i = 0; i<idx; i++)
    m_pool.release(alloc[i]);
  return false;
}

void
DynArr256::init(ReleaseIterator &iter)
{
  iter.m_sz = 1;
  iter.m_pos = 0;
  iter.m_ptr_i[0] = RNIL;
  iter.m_ptr_i[1] = m_head.m_ptr_i;
  iter.m_ptr_i[2] = RNIL;
  iter.m_ptr_i[3] = RNIL;
  iter.m_ptr_i[4] = RNIL;
}

/**
 * Iter is in next pos
 *
 * 0 - done
 * 1 - data
 * 2 - no data
 */
Uint32
DynArr256::release(ReleaseIterator &iter, Uint32 * retptr)
{
  Uint32 sz = iter.m_sz;
  Uint32 ptrI = iter.m_ptr_i[sz];
  Uint32 page_no = ptrI >> DA256_BITS;
  Uint32 page_idx = ptrI & DA256_MASK;
  Uint32 type_id = (~m_pool.m_type_id) & 0xFFFF;
  DA256Page * memroot = m_pool.m_memroot;
  DA256Page * page = memroot + page_no;

  if (ptrI != RNIL)
  {
    Uint32 p0 = iter.m_pos & 255;
    for (; p0<256; p0++)
    {
      Uint32 *retVal, *magic_ptr, p;
      if (p0 != 255)
      {
	Uint32 line = ((p0 << 8) + (p0 << 4) + p0 + 255) >> 12;
	Uint32 * ptr = (Uint32*)(page->m_nodes + page_idx);
	
	p = 0;
	retVal = (ptr + 1 + p0 + line);
	magic_ptr =(ptr + (p0 & ~15));
      }
      else
      {
	Uint32 b = (page_idx + 1) >> 4;
	Uint32 * ptr = (Uint32*)(page->m_header+b);
	
	p = page_idx - (b << 4) + b;
	retVal = (ptr + 1 + p);
	magic_ptr = ptr;
      }
      
      Uint32 magic = *magic_ptr;
      Uint32 val = *retVal;
      if (unlikely(! ((magic & (1 << p)) && (magic >> 16) == type_id)))
	goto err;
      
      if (sz == m_head.m_sz)
      {
	* retptr = val;
	p0++;
	if (p0 != 256)
	{
	  /**
	   * Move next
	   */
	  iter.m_pos &= ~(Uint32)255;
	  iter.m_pos |= p0;
	}
	else
	{
	  /**
	   * Move up
	   */
	  m_pool.release(ptrI);
	  iter.m_sz --;
	  iter.m_pos >>= 8;
	}
	return 1;
      }
      else if (val != RNIL)
      {
	iter.m_sz++;
	iter.m_ptr_i[iter.m_sz] = val;
	iter.m_pos = (p0 << 8);
	* retVal = RNIL;
	return 2;
      }
    }
    
    assert(p0 == 256);
    m_pool.release(ptrI);
    iter.m_sz --;
    iter.m_pos >>= 8;
    return 2;
  }
  
  new (&m_head) Head();
  return 0;
  
err:
  require(false);
  return false;
}

static
inline
bool
seizenode(DA256Page* page, Uint32 idx, Uint32 type_id)
{
  Uint32 i;
  Uint32 b = (idx + 1) >> 4;
  Uint32 p = idx - (b << 4) + b;
  
  DA256Node * ptr = (DA256Node*)(page->m_nodes + idx);  

#ifdef DA256_USE_PREFETCH
#if defined(__GNUC__) && !(__GNUC__ == 2 && __GNUC_MINOR__ < 96)
  __builtin_prefetch (page->m_header + b, 1); 
  for (i = 0; i<17; i++)
  {
    __builtin_prefetch (ptr->m_lines+i, 1);    
  }
#endif
#endif

#ifdef DA256_EXTRA_SAFE
  Uint32 check = type_id;
#endif
  type_id = ((~type_id) << 16) | 0xFFFF;
  
#ifdef DA256_EXTRA_SAFE
  if (unlikely(((page->m_header + b)->m_magic & (1 << p)) != 0))
  {
    return false;
  }
#endif

  (page->m_header + b)->m_magic |= (1 << p);
  (page->m_header + b)->m_data[p] = RNIL;
  for (i = 0; i<17; i++)
  {
    DA256CL * line = ptr->m_lines + i;
#ifdef DA256_EXTRA_SAFE
    if (unlikely(line->m_magic != check))
    {
      return false;
    }
#endif
    line->m_magic = type_id;
    for (Uint32 j = 0; j<15; j++)
      line->m_data[j] = RNIL;
  }

#ifdef UNIT_TEST
  allocatednodes++;
#endif
  return true;
}

static
bool
releasenode(DA256Page* page, Uint32 idx, Uint32 type_id)
{
  Uint32 i;
  Uint32 b = (idx + 1) >> 4;
  Uint32 p = idx - (b << 4) + b;
  
  DA256Node * ptr = (DA256Node*)(page->m_nodes + idx);  

#ifdef DA256_USE_PREFETCH
#if defined(__GNUC__) && !(__GNUC__ == 2 && __GNUC_MINOR__ < 96)
  __builtin_prefetch (page->m_header + b, 1); 
  for (i = 0; i<17; i++)
  {
    __builtin_prefetch (ptr->m_lines+i, 1);    
  }
#endif
#endif

#ifdef DA256_EXTRA_SAFE
  Uint32 check = ((~type_id) << 16) | 0xFFFF;
#endif

#ifdef DA256_EXTRA_SAFE
  if (unlikely((((page->m_header + b)->m_magic & (1 << p)) == 0)))
  {
    return false;
  }
#endif

  (page->m_header + b)->m_magic ^= (1 << p);
  for (i = 0; i<17; i++)
  {
    DA256CL * line = ptr->m_lines + i;
#ifdef DA256_EXTRA_SAFE
    if (unlikely(line->m_magic != check))
    {
      return false;
    }
#endif
    line->m_magic = type_id;
  }

#ifdef UNIT_TEST
  releasednodes++;
#endif

  return true;
}

Uint32
DynArr256Pool::seize()
{
  Uint32 type_id = m_type_id;
  DA256Page* page;
  DA256Page * memroot = m_memroot;

  Guard2 g(m_mutex);
  Uint32 ff = m_first_free;
  if (ff == RNIL)
  { 
    Uint32 page_no;
    if (likely((page = (DA256Page*)m_ctx.alloc_page(type_id, &page_no)) != 0))
    {
      initpage(page, page_no, type_id);
#ifdef UNIT_TEST
      allocatedpages++;
#endif
    }
    else
    {
      return RNIL;
    }
    ff = (page_no << DA256_BITS);
  }
  else
  {
    page = memroot + (ff >> DA256_BITS);
  }
  
  Uint32 idx = ff & DA256_MASK;
  DA256Free * ptr = (DA256Free*)(page->m_nodes + idx);
  if (likely(ptr->m_magic == type_id))
  {
    Uint32 next = ptr->m_next_free;
    if (likely(seizenode(page, idx, type_id)))
    {
      m_first_free = next;    
      return ff;
    }
  }
  
//error:
  require(false);
  return 0;
}

void
DynArr256Pool::release(Uint32 ptrI)
{
  Uint32 type_id = m_type_id;

  Uint32 page_no = ptrI >> DA256_BITS;
  Uint32 page_idx = ptrI & DA256_MASK;
  DA256Page * memroot = m_memroot;
  DA256Page * page = memroot + page_no;
  
  DA256Free * ptr = (DA256Free*)(page->m_nodes + page_idx);
  if (likely(releasenode(page, page_idx, type_id)))
  {
    ptr->m_magic = type_id;
    Guard2 g(m_mutex);
    Uint32 ff = m_first_free;
    ptr->m_next_free = ff;
    m_first_free = ptrI;
    return;
  }
  require(false);
}

#ifdef UNIT_TEST

#include <NdbTick.h>
#include "ndbd_malloc_impl.hpp"
#include "SimulatedBlock.hpp"

Ndbd_mem_manager mm;
Configuration cfg;
Block_context ctx(cfg, mm);
struct BB : public SimulatedBlock
{
  BB(int no, Block_context& ctx) : SimulatedBlock(no, ctx) {}
};

BB block(DBACC, ctx);

static
void
simple(DynArr256 & arr, int argc, char* argv[])
{
  ndbout_c("argc: %d", argc);
  for (Uint32 i = 1; i<(Uint32)argc; i++)
  {
    Uint32 * s = arr.set(atoi(argv[i]));
    {
      bool found = false;
      for (Uint32 j = 1; j<i; j++)
      {
	if (atoi(argv[i]) == atoi(argv[j]))
	{
	  found = true;
	  break;
	}
      }  
      if (!found)
	* s = i;
    }
    
    Uint32 * g = arr.get(atoi(argv[i]));
    Uint32 v = g ? *g : ~0;
    ndbout_c("p: %p %p %d", s, g, v);
  }
}

static
void
basic(DynArr256& arr, int argc, char* argv[])
{
#define MAXLEN 65536
  
  Uint32 len = 0;
  Uint32 save[2*MAXLEN];
  for (Uint32 i = 0; i<MAXLEN; i++)
  {
    int op = (rand() % 100) > 50;
    if (len == 0)
      op = 1;
    if (len == MAXLEN)
      op = 0;
    switch(op){
    case 0:{ // get
      Uint32 item = (rand() % len) << 1;
      Uint32 idx = save[item];
      Uint32 val = save[item+1];
      //ndbout_c("get(%d)", idx);
      Uint32 *p = arr.get(idx);
      assert(p);
      assert(* p == val);
      break;
    }
    case 1:{ // set
      Uint32 item = len << 1;
      Uint32 idx = i; //rand() & 0xFFFFF; // & 0xFFFFF; //rand(); //(65536*i) / 10000;
      Uint32 val = rand();
#if 0
      for(Uint32 j = 0; j < item; j += 2)
      {
	if (save[j] == idx)
	{
	  item = j;
	  break;
	}
      }
#endif
      //ndbout_c("set(%d, %x)", idx, val);
      Uint32 *p = arr.set(idx);
      assert(* p);
      if (item == (len << 1))
      {
	*p = val;
	len++;
      }
      else
      {
	assert(* p == save[item+1]);
	* p = val;
      }
      save[item] = idx;
      save[item+1] = val;
    }
    }
  }
}

unsigned long long 
micro()
{
  struct timeval tv;
  gettimeofday(&tv, 0);
  unsigned long long ret = tv.tv_sec;
  ret *= 1000000;
  ret += tv.tv_usec;
  return ret;
}

static
void
read(DynArr256& arr, int argc, char ** argv)
{
  Uint32 cnt = 100000;
  Uint64 mbytes = 16*1024;
  Uint32 seed = time(0);
  Uint32 seq = 0, seqmask = 0;

  for (Uint32 i = 2; i<argc; i++)
  {
    if (strncmp(argv[i], "--mbytes=", sizeof("--mbytes=")-1) == 0)
    {
      mbytes = atoi(argv[i]+sizeof("--mbytes=")-1);
      if (argv[i][strlen(argv[i])-1] == 'g' ||
	  argv[i][strlen(argv[i])-1] == 'G')
	mbytes *= 1024;
    }
    else if (strncmp(argv[i], "--cnt=", sizeof("--cnt=")-1) == 0)
    {
      cnt = atoi(argv[i]+sizeof("--cnt=")-1);
    }
    else if (strncmp(argv[i], "--seq", sizeof("--seq")-1) == 0)
    {
      seq = 1;
    }
  }
  
  /**
   * Populate with 5Mb
   */
  Uint32 maxidx = (1024*mbytes+31) / 32;
  Uint32 nodes = (maxidx+255) / 256;
  Uint32 pages = (nodes + 29)/ 30;
  ndbout_c("%lldmb data -> %d entries (%dkb)",
	   mbytes, maxidx, 32*pages);
  
  for (Uint32 i = 0; i<maxidx; i++)
  {
    Uint32 *ptr = arr.set(i);
    assert(ptr);
    * ptr = i;
  }

  srand(seed);

  if (seq)
  {
    seq = rand();
    seqmask = ~(Uint32)0;
  }

  ndbout_c("Timing %d %s reads (seed: %u)", cnt, 
	   seq ? "sequential" : "random", seed);

  for (Uint32 i = 0; i<10; i++)
  {
    Uint32 sum0 = 0, sum1 = 0;
    Uint64 start = micro();
    for (Uint32 i = 0; i<cnt; i++)
    {
      Uint32 idx = ((rand() & (~seqmask)) + ((i + seq) & seqmask)) % maxidx;
      Uint32 *ptr = arr.get(idx);
      sum0 += idx;
      sum1 += *ptr;
    }
    start = micro() - start;
    float uspg = start; uspg /= cnt;
    ndbout_c("Elapsed %lldus diff: %d -> %f us/get", start, sum0 - sum1, uspg);
  }
}

static
void
write(DynArr256& arr, int argc, char ** argv)
{
  Uint32 seq = 0, seqmask = 0;
  Uint32 cnt = 100000;
  Uint64 mbytes = 16*1024;
  Uint32 seed = time(0);

  for (Uint32 i = 2; i<argc; i++)
  {
    if (strncmp(argv[i], "--mbytes=", sizeof("--mbytes=")-1) == 0)
    {
      mbytes = atoi(argv[i]+sizeof("--mbytes=")-1);
      if (argv[i][strlen(argv[i])-1] == 'g' ||
	  argv[i][strlen(argv[i])-1] == 'G')
	mbytes *= 1024;
    }
    else if (strncmp(argv[i], "--cnt=", sizeof("--cnt=")-1) == 0)
    {
      cnt = atoi(argv[i]+sizeof("--cnt=")-1);
    }
    else if (strncmp(argv[i], "--seq", sizeof("--seq")-1) == 0)
    {
      seq = 1;
    }
  }
  
  /**
   * Populate with 5Mb
   */
  Uint32 maxidx = (1024*mbytes+31) / 32;
  Uint32 nodes = (maxidx+255) / 256;
  Uint32 pages = (nodes + 29)/ 30;
  ndbout_c("%lldmb data -> %d entries (%dkb)",
	   mbytes, maxidx, 32*pages);

  srand(seed);

  if (seq)
  {
    seq = rand();
    seqmask = ~(Uint32)0;
  }

  ndbout_c("Timing %d %s writes (seed: %u)", cnt, 
	   seq ? "sequential" : "random", seed);
  for (Uint32 i = 0; i<10; i++)
  {
    Uint64 start = micro();
    for (Uint32 i = 0; i<cnt; i++)
    {
      Uint32 idx = ((rand() & (~seqmask)) + ((i + seq) & seqmask)) % maxidx;
      Uint32 *ptr = arr.set(idx);
      *ptr = i;
    }
    start = micro() - start;
    float uspg = start; uspg /= cnt;
    ndbout_c("Elapsed %lldus -> %f us/set", start, uspg);
    DynArr256::ReleaseIterator iter;
    arr.init(iter);
    Uint32 val;
    while(arr.release(iter, &val));
  }
}

int
main(int argc, char** argv)
{
  if (0)
  {
    for (Uint32 i = 0; i<30; i++)
    {
      Uint32 b = (i + 1) >> 4;
      Uint32 p = i - (b << 4) + b;
      printf("[ %d %d %d ]\n", i, b, p);
    }
    return 0;
  }

  Pool_context pc;
  pc.m_block = &block;
  
  Resource_limit rl;
  rl.m_min = 0;
  rl.m_max = 10000;
  rl.m_resource_id = 0;
  mm.set_resource_limit(rl);
  if(!mm.init())
  {
    abort();
  }

  DynArr256Pool pool;
  pool.init(0x2001, pc);

  DynArr256::Head head;
  DynArr256 arr(pool, head);

  if (strcmp(argv[1], "--simple") == 0)
    simple(arr, argc, argv);
  else if (strcmp(argv[1], "--basic") == 0)
    basic(arr, argc, argv);
  else if (strcmp(argv[1], "--read") == 0)
    read(arr, argc, argv);
  else if (strcmp(argv[1], "--write") == 0)
    write(arr, argc, argv);

  DynArr256::ReleaseIterator iter;
  arr.init(iter);
  Uint32 cnt = 0, val;
  while (arr.release(iter, &val)) cnt++;
  
  ndbout_c("allocatedpages: %d allocatednodes: %d releasednodes: %d"
	   " releasecnt: %d",
	   allocatedpages, 
	   allocatednodes,
	   releasednodes,
	   cnt);
  
  return 0;
#if 0
  printf("sizeof(DA256Page): %d\n", sizeof(DA256Page));

  DA256Page page;

  for (Uint32 i = 0; i<10000; i++)
  {
    Uint32 arg = rand() & 255;
    Uint32 base = 0;
    Uint32 idx = arg & 256;
    printf("%d\n", arg);

    assert(base <= 30);
    
    if (idx == 255)
    {
      Uint32 b = (base + 1) >> 4;
      Uint32 p = base - (b << 4) + b;
      Uint32 magic = page.m_header[b].m_magic;
      Uint32 retVal = page.m_header[b].m_data[p];
      
      require(magic & (1 << p));
      return retVal;
    }
    else
    {
      // 4 bit extra offset per idx
      Uint32 line = idx / 15;
      Uint32 off = idx % 15;
      
      {
	Uint32 pos = 1 + idx + line;
	Uint32 magic = pos & ~15;
	
	Uint32 * ptr = (Uint32*)&page.m_nodes[base];
	assert((ptr + pos) == &page.m_nodes[base].m_lines[line].m_data[off]);
	assert((ptr + magic) == &page.m_nodes[base].m_lines[line].m_magic);
      }
    }
  }
#endif
}

Uint32 g_currentStartPhase;
Uint32 g_start_type;
NdbNodeBitmask g_nowait_nodes;

void
UpgradeStartup::sendCmAppChg(Ndbcntr& cntr, Signal* signal, Uint32 startLevel){
}

void
UpgradeStartup::execCM_APPCHG(SimulatedBlock & block, Signal* signal){
}

void
UpgradeStartup::sendCntrMasterReq(Ndbcntr& cntr, Signal* signal, Uint32 n){
}

void
UpgradeStartup::execCNTR_MASTER_REPLY(SimulatedBlock & block, Signal* signal){
}

#include <SimBlockList.hpp>

void
SimBlockList::unload()
{

}

#endif
