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// file : cult/mm/new.cxx
// author : Boris Kolpackov <boris@kolpackov.net>
// copyright : Copyright (c) 2005-2010 Boris Kolpackov
// license : GNU GPL v2 + exceptions; see accompanying LICENSE file
#include <cult/mm/new.hxx>
#include <cult/mm/counter.hxx>
#include <cstdlib> // std::malloc, std::free
#include <cult/trace/stream.hxx>
namespace
{
Cult::Trace::Stream&
tout ()
{
static Cult::Trace::Stream o ("Cult::MM", 7);
return o;
}
}
namespace Cult
{
namespace MM
{
using Bits::Offset;
namespace
{
Void*
allocate (Size size, KeyList const& l) throw (StdBadAlloc)
{
Size zone_size (0);
for (KeyList::Iterator i (l.begin ()); i != l.end (); ++i)
{
zone_size += (*i)->size ();
}
Size map_size ((l.size () + 1) * sizeof (Offset));
//tout () << "allocate: size: " << size
// << " map size: " << map_size
// << " zone size: " << zone_size;
Char* block (reinterpret_cast<Char*> (
std::malloc (size + zone_size + map_size)));
Char* base (block + zone_size + map_size);
Offset* map (reinterpret_cast<Offset*> (base) - 1); // map bottom
Char* zone (block + zone_size); // zone bottom
//tout () << 9 << "allocate:" << '\n'
// << " block : " << (Void*) block << '\n'
// << " base : " << (Void*) base << '\n'
// << " map : " << (Void*) zone << '\n'
// << " zone : " << (Void*) block;
// Initialize zone map and construct services.
//
for (KeyList::Iterator i (l.begin ()); i != l.end (); ++i)
{
KeyBase const& k (**i);
zone -= k.size (); // now at the beginning of the block
try
{
k.construct (zone);
}
catch (...)
{
std::free (block);
throw StdBadAlloc ();
}
map->key = &k;
map->offset = base - zone;
--map;
}
// Last element.
//
map->key = 0;
map->offset = 0;
return base;
}
Void
free (Void* p) throw ()
{
Char* base (reinterpret_cast<Char*> (p));
Offset* map (reinterpret_cast<Offset*> (base) - 1); // Map bottom.
Char* block (reinterpret_cast<Char*> (map));
while (map->key != 0)
{
Char* zone (base - map->offset);
block = zone; // Last zone is the begining of the block.
map->key->destroy (zone);
--map;
}
//tout () << 9 << "free:" << '\n'
// << " block : " << (Void*) block;
std::free (block);
}
}
}
}
namespace Cult
{
namespace MM
{
namespace Bits
{
#ifdef CULT_THREADS
__thread
Block* first_ __attribute__ ((tls_model ("initial-exec"))) = 0;
#else
Block* first_ = 0;
#endif
}
}
}
using namespace Cult;
Void*
operator new (Size s) throw (MM::StdBadAlloc)
{
return MM::allocate (s, *MM::counted);
}
Void*
operator new (Size size, MM::KeyList const& list, MM::Bits::Block const& b)
throw (MM::StdBadAlloc)
{
Void* p (MM::allocate (size, list));
const_cast<MM::Bits::Block&> (b).set (p, size);
return p;
}
Void
operator delete (Void* p) throw ()
{
if (p) MM::free (p);
}
Void
operator delete (Void* p, Size) throw ()
{
if (p) MM::free (p);
}
namespace Cult
{
namespace MM
{
Void* ServiceAwareObject::
operator new (Size size, Bits::Block const& block)
{
Void* p (allocate (size, *MM::counted));
const_cast<MM::Bits::Block&> (block).set (p, size);
return p;
}
Void ServiceAwareObject::
operator delete (Void* p, Size)
{
if (p) MM::free (p);
}
}
}
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