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/*
FALCON - The Falcon Programming Language
FILE: livemodule.cpp
The Representation of module live data once linked in a VM
-------------------------------------------------------------------
Author: Giancarlo Niccolai
Begin: Fri, 03 Apr 2009 23:27:53 +0200
-------------------------------------------------------------------
(C) Copyright 2004: the FALCON developers (see list in AUTHORS file)
See LICENSE file for licensing details.
*/
/** \file
MThe Representation of module live data once linked in a VM
*/
#include <falcon/livemodule.h>
#include <falcon/memory.h>
#include <falcon/fassert.h>
#include <falcon/mempool.h>
#include <string.h>
namespace Falcon {
//=================================================================================
// The live module class.
//=================================================================================
LiveModule::LiveModule( Module *mod, bool bPrivate ):
Garbageable(),
m_module( mod ),
m_aacc( 0 ),
m_iacc( 0 ),
m_bPrivate( bPrivate ),
m_bAlive(true),
m_needsCompleteLink( true ),
m_initState( init_none )
{
m_module->incref();
m_strCount = mod->stringTable().size();
if( m_strCount > 0 )
{
m_strings = static_cast<CoreString**>( memAlloc( sizeof(CoreString*) * m_strCount ) );
memset( m_strings, 0, sizeof(CoreString*) * m_strCount );
}
else {
m_strings = 0;
}
}
LiveModule::~LiveModule()
{
fassert( m_module != 0 );
if ( m_strings != 0 )
memFree( m_strings );
m_module->decref();
memPool->accountItems( m_iacc );
gcMemAccount( m_aacc );
}
void LiveModule::detachModule()
{
// disengage all the items.
uint32 i;
// TODO: memset to 0
for ( i = 0; i < m_globals.length(); ++i )
{
// disengage but not dereferece; we want to nil the globals here,
// not to destroy the imported symbols.
m_globals[ i ].setNil();
}
for ( i = 0; i < m_wkitems.length(); ++i )
{
wkitems()[i].dereference()->setNil();
}
m_bAlive = false;
}
Item *LiveModule::findModuleItem( const String &symName ) const
{
if ( ! isAlive() )
return 0;
const Symbol *sym = m_module->findGlobalSymbol( symName );
if ( sym == 0 )
return 0;
return const_cast<Item*>(&m_globals[ sym->itemId() ]);
}
bool LiveModule::finalize()
{
// resist early destruction
return false;
}
void LiveModule::gcMark( uint32 mk )
{
if( mk != mark() )
{
mark( mk );
for( uint32 i = 0; i < m_strCount; ++i )
{
if( m_strings[i] != 0 )
m_strings[i]->mark( mk );
}
globals().gcMark( mk );
wkitems().gcMark( mk );
userItems().gcMark( mk );
}
}
String* LiveModule::getString( uint32 stringId ) const
{
fassert( stringId < (uint32) m_module->stringTable().size() );
if( stringId >= m_strCount )
{
m_strings = static_cast<CoreString**>(memRealloc( m_strings, sizeof( CoreString* ) * (stringId+1) ));
memset( m_strings + m_strCount, 0, sizeof( CoreString* ) * ( stringId - m_strCount +1) );
m_strCount = stringId+1;
}
if( m_strings[stringId] == 0 )
{
CoreString* dest = new CoreString( *m_module->stringTable().get( stringId ) );
m_strings[stringId] = dest;
dest->bufferize();
gcMemUnaccount( sizeof( CoreString ) + dest->allocated() );
memPool->accountItems( -1 );
m_aacc += sizeof( CoreString ) + dest->allocated();
m_iacc++;
return dest;
}
return m_strings[stringId];
}
//=================================================================================
// Live module related traits
//=================================================================================
uint32 LiveModulePtrTraits::memSize() const
{
return sizeof( LiveModule * );
}
void LiveModulePtrTraits::init( void *itemZone ) const
{
itemZone = 0;
}
void LiveModulePtrTraits::copy( void *targetZone, const void *sourceZone ) const
{
LiveModule **target = (LiveModule **) targetZone;
LiveModule *source = (LiveModule *) sourceZone;
*target = source;
}
int LiveModulePtrTraits::compare( const void *firstz, const void *secondz ) const
{
// never used as key
return 0;
}
void LiveModulePtrTraits::destroy( void *item ) const
{
/* Owned by GC
LiveModule *ptr = *(LiveModule **) item;
delete ptr;
*/
}
bool LiveModulePtrTraits::owning() const
{
/* Owned by GC */
return false;
}
}
/* end of livemodule.cpp */
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