genesis-3d_engine/Engine/foundation/core/rtti.cc

/****************************************************************************
Copyright (c) 2006, Radon Labs GmbH
Copyright (c) 2011-2013,WebJet Business Division,CYOU
 
http://www.genesis-3d.com.cn

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/

#include "stdneb.h"
#include "core/rtti.h"
#include "core/refcounted.h"
#include "core/sysfunc.h"

#if NEBULA3_OBJECTS_USE_MEMORYPOOL
#include "memory/poolarrayallocator.h"
#endif

namespace Core
{
using namespace Util;

//------------------------------------------------------------------------------
/**
*/
void
Rtti::Construct(const char* className, FourCC fcc, Creator creatorFunc, const Rtti* parentClass, SizeT instSize)
{
    // make sure String, etc... is working correctly

	Core::SysFunc::Setup();


    // NOTE: FourCC code may be 0!
    n_assert(0 != className);
    n_assert(parentClass != this);

    // setup members
    this->parent = parentClass;
    this->fourCC = fcc;     // NOTE: may be 0
    this->creator = creatorFunc;
    this->instanceSize = instSize;

    // register class with factory
    this->name = className;
    if (fcc.IsValid())
    {
        // FourCC code valid
        if (!Factory::Instance()->ClassExists(fcc))
        {
            Factory::Instance()->Register(this, this->name, fcc);        
        }
        // make a debug check that no name/fcc collission occured, but only in debug mode
        #if NEBULA3_DEBUG
        else
        {
            const Rtti* checkRtti = Factory::Instance()->GetClassRtti(fcc);
            n_assert(0 != checkRtti);
            if (checkRtti != this)
            {
                n_error("Class registry collision: (%s, %s) collides with (%s, %s)!",
                    this->name.AsCharPtr(), this->fourCC.AsString().AsCharPtr(),
                    checkRtti->name.AsCharPtr(), checkRtti->fourCC.AsString().AsCharPtr());
            }
        }
        #endif
    }
    else
    {
        // FourCC code not valid
        if (!Factory::Instance()->ClassExists(this->name))
        {
            Factory::Instance()->Register(this, this->name);
        }
        // make a debug check that no name/fcc collission occured, but only in debug mode
        #if NEBULA3_DEBUG
        else
        {
            const Rtti* checkRtti = Factory::Instance()->GetClassRtti(this->name);
            n_assert(0 != checkRtti);
            if (checkRtti != this)
            {
                n_error("Class registry collision: (%s) collides with (%s)!",
                    this->name.AsCharPtr(), checkRtti->name.AsCharPtr());
            }
        }
        #endif
    }
}

//------------------------------------------------------------------------------
/**
*/
Rtti::Rtti(const char* className, FourCC fcc, Creator creatorFunc, const Rtti* parentClass, SizeT instSize)
{
    this->Construct(className, fcc, creatorFunc, parentClass, instSize);
}

//------------------------------------------------------------------------------
/**
*/
Rtti::Rtti(const char* className, Creator creatorFunc, const Rtti* parentClass, SizeT instSize)
{
    this->Construct(className, 0, creatorFunc, parentClass, instSize);
}

//------------------------------------------------------------------------------
/**
*/
RefCounted*
Rtti::Create() const
{
    if (0 == this->creator)
    {
        n_error("Rtti::Create(): Trying to create instance of abstract class '%s'!", this->name.AsCharPtr());
        return 0;
    }
    else
    {
        return this->creator();
    }
}

//------------------------------------------------------------------------------
/**
*/
bool
Rtti::IsDerivedFrom(const Rtti& other) const
{
    const Rtti* cur;
    for (cur = this; cur != 0; cur = cur->GetParent())
    {
        if (cur == &other)
        {
            return true;
        }
    }
    return false;
}

//------------------------------------------------------------------------------
/**
*/
bool
Rtti::IsDerivedFrom(const Util::String& otherClassName) const
{
    const Rtti* cur;
    for (cur = this; cur != 0; cur = cur->GetParent())
    {
        if (cur->name == otherClassName)
        {
            return true;
        }
    }
    return false;
}

//------------------------------------------------------------------------------
/**
*/
bool
Rtti::IsDerivedFrom(const Util::FourCC& otherClassFourCC) const
{
    const Rtti* cur;
    for (cur = this; cur != 0; cur = cur->GetParent())
    {
        if (cur->fourCC == otherClassFourCC)
        {
            return true;
        }
    }
    return false;
}

//------------------------------------------------------------------------------
/**
*/
void*
Rtti::AllocInstanceMemory()
{
    #if NEBULA3_OBJECTS_USE_MEMORYPOOL    
    void* ptr = Memory::ObjectPoolAllocator->Alloc(this->instanceSize);
    #else
    void* ptr = Memory::Alloc(Memory::ObjectHeap, this->instanceSize);
    #endif
    return ptr;
}

//------------------------------------------------------------------------------
/**
*/
void
Rtti::FreeInstanceMemory(void* ptr)
{
    #if NEBULA3_OBJECTS_USE_MEMORYPOOL
    Memory::ObjectPoolAllocator->Free(ptr, this->instanceSize);
    #else
    Memory::Free(Memory::ObjectHeap, ptr);
    #endif
}

} // namespace Core