cef/libcef_dll/ctocpp/base_ctocpp.h

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// Copyright (c) 2009 The Chromium Embedded Framework Authors. All rights
// reserved. Use of this source code is governed by a BSD-style license that
// can be found in the LICENSE file.
#ifndef _BASE_CTOCPP_H
#define _BASE_CTOCPP_H
#include "include/cef.h"
#include "include/cef_capi.h"
#include "libcef_dll/cef_logging.h"
// CefCToCpp implementation for CefBase.
class CefBaseCToCpp : public CefBase
{
public:
// Use this method to create a wrapper class instance for a structure
// received from the other side.
static CefRefPtr<CefBase> Wrap(cef_base_t* s)
{
// Wrap their structure with the CefCToCpp object.
CefBaseCToCpp* wrapper = new CefBaseCToCpp(s);
// Put the wrapper object in a smart pointer.
CefRefPtr<CefBase> wrapperPtr(wrapper);
// Release the reference that was added to the CefCppToC wrapper object on
// the other side before their structure was passed to us.
wrapper->UnderlyingRelease();
// Return the smart pointer.
return wrapperPtr;
}
// Use this method to retrieve the underlying structure from a wrapper class
// instance for return back to the other side.
static cef_base_t* Unwrap(CefRefPtr<CefBase> c)
{
// Cast the object to our wrapper class type.
CefBaseCToCpp* wrapper = static_cast<CefBaseCToCpp*>(c.get());
// Add a reference to the CefCppToC wrapper object on the other side that
// will be released once the structure is received.
wrapper->UnderlyingAddRef();
// Return their original structure.
return wrapper->GetStruct();
}
CefBaseCToCpp(cef_base_t* str)
: struct_(str)
{
DCHECK(str);
}
virtual ~CefBaseCToCpp() {}
// If returning the structure across the DLL boundary you should call
// UnderlyingAddRef() on this wrapping CefCToCpp object. On the other side of
// the DLL boundary, call Release() on the CefCppToC object.
cef_base_t* GetStruct() { return struct_; }
// CefBase methods increment/decrement reference counts on both this object
// and the underlying wrapped structure.
int AddRef()
{
UnderlyingAddRef();
return refct_.AddRef();
}
int Release()
{
UnderlyingRelease();
int retval = refct_.Release();
if (retval == 0)
delete this;
return retval;
}
int GetRefCt() { return refct_.GetRefCt(); }
// Increment/decrement reference counts on only the underlying class.
int UnderlyingAddRef()
{
if(!struct_->add_ref)
return 0;
return struct_->add_ref(struct_);
}
int UnderlyingRelease()
{
if(!struct_->release)
return 0;
return struct_->release(struct_);
}
int UnderlyingGetRefCt()
{
if(!struct_->get_refct)
return 0;
return struct_->get_refct(struct_);
}
protected:
CefRefCount refct_;
cef_base_t* struct_;
};
#endif // _BASE_CTOCPP_H