cef/libcef_dll/ctocpp/ctocpp_ref_counted.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 CEF_LIBCEF_DLL_CTOCPP_CTOCPP_REF_COUNTED_H_
#define CEF_LIBCEF_DLL_CTOCPP_CTOCPP_REF_COUNTED_H_
#pragma once
#include "include/base/cef_logging.h"
#include "include/capi/cef_base_capi.h"
#include "include/cef_base.h"
#include "libcef_dll/wrapper_types.h"
// Wrap a C structure with a C++ class. This is used when the implementation
// exists on the other side of the DLL boundary but will have methods called on
// this side of the DLL boundary.
template <class ClassName, class BaseName, class StructName>
class CefCToCppRefCounted : public BaseName {
public:
CefCToCppRefCounted(const CefCToCppRefCounted&) = delete;
CefCToCppRefCounted& operator=(const CefCToCppRefCounted&) = delete;
// Create a new wrapper instance for a structure reference received from the
// other side.
static CefRefPtr<BaseName> Wrap(StructName* s);
// Retrieve the underlying structure reference from a wrapper instance for
// return back to the other side.
static StructName* Unwrap(CefRefPtr<BaseName> c);
// CefBaseRefCounted methods increment/decrement reference counts on both this
// object and the underlying wrapped structure.
void AddRef() const {
UnderlyingAddRef();
ref_count_.AddRef();
}
bool Release() const;
bool HasOneRef() const { return UnderlyingHasOneRef(); }
bool HasAtLeastOneRef() const { return UnderlyingHasAtLeastOneRef(); }
protected:
CefCToCppRefCounted() = default;
virtual ~CefCToCppRefCounted() = default;
// If returning the structure across the DLL boundary use Unwrap() instead.
StructName* GetStruct() const {
WrapperStruct* wrapperStruct = GetWrapperStruct(this);
// Verify that the wrapper offset was calculated correctly.
DCHECK_EQ(kWrapperType, wrapperStruct->type_);
return wrapperStruct->struct_;
}
private:
// Used to associate this wrapper object and the structure reference received
// from the other side.
struct WrapperStruct;
static WrapperStruct* GetWrapperStruct(const BaseName* obj);
// Unwrap as the derived type.
static StructName* UnwrapDerived(CefWrapperType type, BaseName* c);
// Increment/decrement reference counts on only the underlying class.
NO_SANITIZE("cfi-icall")
Introduce the use of Chromium types (issue #1336). Changes to the CEF public API: - Add base::Bind, base::Callback, base::Lock, base::WeakPtr, scoped_refptr, scoped_ptr and supporting types. - Add include/wrapper/cef_closure_task.h helpers for converting a base::Closure to a CefTask. - Change CefRefPtr to extend scoped_refptr. -- Change CefBase method signatures to match RefCountedThreadSafeBase. - Change IMPLEMENT_REFCOUNTING to use base::AtomicRefCount*. -- Remove the CefAtomic* functions. -- IMPLEMENT_REFCOUNTING now enforces via a compile-time error that the correct class name was passed to the macro. - Change IMPLEMENT_LOCKING to use base::Lock. -- Remove the CefCriticalSection class. -- Deprecate the IMPLEMENT_LOCKING macro. -- base::Lock will DCHECK() in Debug builds if lock usage is reentrant. - Move include/internal/cef_tuple.h to include/base/cef_tuple.h. - Allow an empty |callback| parameter passed to CefBeginTracing. Changes to the CEF implementation: - Fix incorrect names passed to the IMPLEMENT_REFCOUNTING macro. - Fix instances of reentrant locking in the CefXmlObject and CefRequest implementations. - Remove use of the IMPLEMENT_LOCKING macro. Changes to cef_unittests: - Add tests/unittests/chromium_includes.h and always include it first from unit test .cc files to avoid name conflicts with Chromium types. - Fix wrong header include ordering. - Remove use of the IMPLEMENT_LOCKING macro. Changes to cefclient and cefsimple: - Use base::Bind and cef_closure_task.h instead of NewCefRunnable*. - Remove use of the IMPEMENT_LOCKING macro. - Fix incorrect/unnecessary locking. - Add additional runtime thread checks. - Windows: Perform actions on the UI thread instead of the main thread when running in multi-threaded-message-loop mode to avoid excessive locking. git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@1769 5089003a-bbd8-11dd-ad1f-f1f9622dbc98
2014-07-15 00:18:51 +02:00
void UnderlyingAddRef() const {
cef_base_ref_counted_t* base =
reinterpret_cast<cef_base_ref_counted_t*>(GetStruct());
if (base->add_ref)
base->add_ref(base);
}
NO_SANITIZE("cfi-icall")
Introduce the use of Chromium types (issue #1336). Changes to the CEF public API: - Add base::Bind, base::Callback, base::Lock, base::WeakPtr, scoped_refptr, scoped_ptr and supporting types. - Add include/wrapper/cef_closure_task.h helpers for converting a base::Closure to a CefTask. - Change CefRefPtr to extend scoped_refptr. -- Change CefBase method signatures to match RefCountedThreadSafeBase. - Change IMPLEMENT_REFCOUNTING to use base::AtomicRefCount*. -- Remove the CefAtomic* functions. -- IMPLEMENT_REFCOUNTING now enforces via a compile-time error that the correct class name was passed to the macro. - Change IMPLEMENT_LOCKING to use base::Lock. -- Remove the CefCriticalSection class. -- Deprecate the IMPLEMENT_LOCKING macro. -- base::Lock will DCHECK() in Debug builds if lock usage is reentrant. - Move include/internal/cef_tuple.h to include/base/cef_tuple.h. - Allow an empty |callback| parameter passed to CefBeginTracing. Changes to the CEF implementation: - Fix incorrect names passed to the IMPLEMENT_REFCOUNTING macro. - Fix instances of reentrant locking in the CefXmlObject and CefRequest implementations. - Remove use of the IMPLEMENT_LOCKING macro. Changes to cef_unittests: - Add tests/unittests/chromium_includes.h and always include it first from unit test .cc files to avoid name conflicts with Chromium types. - Fix wrong header include ordering. - Remove use of the IMPLEMENT_LOCKING macro. Changes to cefclient and cefsimple: - Use base::Bind and cef_closure_task.h instead of NewCefRunnable*. - Remove use of the IMPEMENT_LOCKING macro. - Fix incorrect/unnecessary locking. - Add additional runtime thread checks. - Windows: Perform actions on the UI thread instead of the main thread when running in multi-threaded-message-loop mode to avoid excessive locking. git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@1769 5089003a-bbd8-11dd-ad1f-f1f9622dbc98
2014-07-15 00:18:51 +02:00
bool UnderlyingRelease() const {
cef_base_ref_counted_t* base =
reinterpret_cast<cef_base_ref_counted_t*>(GetStruct());
if (!base->release)
Introduce the use of Chromium types (issue #1336). Changes to the CEF public API: - Add base::Bind, base::Callback, base::Lock, base::WeakPtr, scoped_refptr, scoped_ptr and supporting types. - Add include/wrapper/cef_closure_task.h helpers for converting a base::Closure to a CefTask. - Change CefRefPtr to extend scoped_refptr. -- Change CefBase method signatures to match RefCountedThreadSafeBase. - Change IMPLEMENT_REFCOUNTING to use base::AtomicRefCount*. -- Remove the CefAtomic* functions. -- IMPLEMENT_REFCOUNTING now enforces via a compile-time error that the correct class name was passed to the macro. - Change IMPLEMENT_LOCKING to use base::Lock. -- Remove the CefCriticalSection class. -- Deprecate the IMPLEMENT_LOCKING macro. -- base::Lock will DCHECK() in Debug builds if lock usage is reentrant. - Move include/internal/cef_tuple.h to include/base/cef_tuple.h. - Allow an empty |callback| parameter passed to CefBeginTracing. Changes to the CEF implementation: - Fix incorrect names passed to the IMPLEMENT_REFCOUNTING macro. - Fix instances of reentrant locking in the CefXmlObject and CefRequest implementations. - Remove use of the IMPLEMENT_LOCKING macro. Changes to cef_unittests: - Add tests/unittests/chromium_includes.h and always include it first from unit test .cc files to avoid name conflicts with Chromium types. - Fix wrong header include ordering. - Remove use of the IMPLEMENT_LOCKING macro. Changes to cefclient and cefsimple: - Use base::Bind and cef_closure_task.h instead of NewCefRunnable*. - Remove use of the IMPEMENT_LOCKING macro. - Fix incorrect/unnecessary locking. - Add additional runtime thread checks. - Windows: Perform actions on the UI thread instead of the main thread when running in multi-threaded-message-loop mode to avoid excessive locking. git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@1769 5089003a-bbd8-11dd-ad1f-f1f9622dbc98
2014-07-15 00:18:51 +02:00
return false;
return base->release(base) ? true : false;
}
NO_SANITIZE("cfi-icall")
Introduce the use of Chromium types (issue #1336). Changes to the CEF public API: - Add base::Bind, base::Callback, base::Lock, base::WeakPtr, scoped_refptr, scoped_ptr and supporting types. - Add include/wrapper/cef_closure_task.h helpers for converting a base::Closure to a CefTask. - Change CefRefPtr to extend scoped_refptr. -- Change CefBase method signatures to match RefCountedThreadSafeBase. - Change IMPLEMENT_REFCOUNTING to use base::AtomicRefCount*. -- Remove the CefAtomic* functions. -- IMPLEMENT_REFCOUNTING now enforces via a compile-time error that the correct class name was passed to the macro. - Change IMPLEMENT_LOCKING to use base::Lock. -- Remove the CefCriticalSection class. -- Deprecate the IMPLEMENT_LOCKING macro. -- base::Lock will DCHECK() in Debug builds if lock usage is reentrant. - Move include/internal/cef_tuple.h to include/base/cef_tuple.h. - Allow an empty |callback| parameter passed to CefBeginTracing. Changes to the CEF implementation: - Fix incorrect names passed to the IMPLEMENT_REFCOUNTING macro. - Fix instances of reentrant locking in the CefXmlObject and CefRequest implementations. - Remove use of the IMPLEMENT_LOCKING macro. Changes to cef_unittests: - Add tests/unittests/chromium_includes.h and always include it first from unit test .cc files to avoid name conflicts with Chromium types. - Fix wrong header include ordering. - Remove use of the IMPLEMENT_LOCKING macro. Changes to cefclient and cefsimple: - Use base::Bind and cef_closure_task.h instead of NewCefRunnable*. - Remove use of the IMPEMENT_LOCKING macro. - Fix incorrect/unnecessary locking. - Add additional runtime thread checks. - Windows: Perform actions on the UI thread instead of the main thread when running in multi-threaded-message-loop mode to avoid excessive locking. git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@1769 5089003a-bbd8-11dd-ad1f-f1f9622dbc98
2014-07-15 00:18:51 +02:00
bool UnderlyingHasOneRef() const {
cef_base_ref_counted_t* base =
reinterpret_cast<cef_base_ref_counted_t*>(GetStruct());
if (!base->has_one_ref)
Introduce the use of Chromium types (issue #1336). Changes to the CEF public API: - Add base::Bind, base::Callback, base::Lock, base::WeakPtr, scoped_refptr, scoped_ptr and supporting types. - Add include/wrapper/cef_closure_task.h helpers for converting a base::Closure to a CefTask. - Change CefRefPtr to extend scoped_refptr. -- Change CefBase method signatures to match RefCountedThreadSafeBase. - Change IMPLEMENT_REFCOUNTING to use base::AtomicRefCount*. -- Remove the CefAtomic* functions. -- IMPLEMENT_REFCOUNTING now enforces via a compile-time error that the correct class name was passed to the macro. - Change IMPLEMENT_LOCKING to use base::Lock. -- Remove the CefCriticalSection class. -- Deprecate the IMPLEMENT_LOCKING macro. -- base::Lock will DCHECK() in Debug builds if lock usage is reentrant. - Move include/internal/cef_tuple.h to include/base/cef_tuple.h. - Allow an empty |callback| parameter passed to CefBeginTracing. Changes to the CEF implementation: - Fix incorrect names passed to the IMPLEMENT_REFCOUNTING macro. - Fix instances of reentrant locking in the CefXmlObject and CefRequest implementations. - Remove use of the IMPLEMENT_LOCKING macro. Changes to cef_unittests: - Add tests/unittests/chromium_includes.h and always include it first from unit test .cc files to avoid name conflicts with Chromium types. - Fix wrong header include ordering. - Remove use of the IMPLEMENT_LOCKING macro. Changes to cefclient and cefsimple: - Use base::Bind and cef_closure_task.h instead of NewCefRunnable*. - Remove use of the IMPEMENT_LOCKING macro. - Fix incorrect/unnecessary locking. - Add additional runtime thread checks. - Windows: Perform actions on the UI thread instead of the main thread when running in multi-threaded-message-loop mode to avoid excessive locking. git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@1769 5089003a-bbd8-11dd-ad1f-f1f9622dbc98
2014-07-15 00:18:51 +02:00
return false;
return base->has_one_ref(base) ? true : false;
}
NO_SANITIZE("cfi-icall")
bool UnderlyingHasAtLeastOneRef() const {
cef_base_ref_counted_t* base =
reinterpret_cast<cef_base_ref_counted_t*>(GetStruct());
if (!base->has_at_least_one_ref)
return false;
return base->has_at_least_one_ref(base) ? true : false;
}
Introduce the use of Chromium types (issue #1336). Changes to the CEF public API: - Add base::Bind, base::Callback, base::Lock, base::WeakPtr, scoped_refptr, scoped_ptr and supporting types. - Add include/wrapper/cef_closure_task.h helpers for converting a base::Closure to a CefTask. - Change CefRefPtr to extend scoped_refptr. -- Change CefBase method signatures to match RefCountedThreadSafeBase. - Change IMPLEMENT_REFCOUNTING to use base::AtomicRefCount*. -- Remove the CefAtomic* functions. -- IMPLEMENT_REFCOUNTING now enforces via a compile-time error that the correct class name was passed to the macro. - Change IMPLEMENT_LOCKING to use base::Lock. -- Remove the CefCriticalSection class. -- Deprecate the IMPLEMENT_LOCKING macro. -- base::Lock will DCHECK() in Debug builds if lock usage is reentrant. - Move include/internal/cef_tuple.h to include/base/cef_tuple.h. - Allow an empty |callback| parameter passed to CefBeginTracing. Changes to the CEF implementation: - Fix incorrect names passed to the IMPLEMENT_REFCOUNTING macro. - Fix instances of reentrant locking in the CefXmlObject and CefRequest implementations. - Remove use of the IMPLEMENT_LOCKING macro. Changes to cef_unittests: - Add tests/unittests/chromium_includes.h and always include it first from unit test .cc files to avoid name conflicts with Chromium types. - Fix wrong header include ordering. - Remove use of the IMPLEMENT_LOCKING macro. Changes to cefclient and cefsimple: - Use base::Bind and cef_closure_task.h instead of NewCefRunnable*. - Remove use of the IMPEMENT_LOCKING macro. - Fix incorrect/unnecessary locking. - Add additional runtime thread checks. - Windows: Perform actions on the UI thread instead of the main thread when running in multi-threaded-message-loop mode to avoid excessive locking. git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@1769 5089003a-bbd8-11dd-ad1f-f1f9622dbc98
2014-07-15 00:18:51 +02:00
CefRefCount ref_count_;
static CefWrapperType kWrapperType;
};
template <class ClassName, class BaseName, class StructName>
struct CefCToCppRefCounted<ClassName, BaseName, StructName>::WrapperStruct {
CefWrapperType type_;
StructName* struct_;
ClassName wrapper_;
};
template <class ClassName, class BaseName, class StructName>
CefRefPtr<BaseName> CefCToCppRefCounted<ClassName, BaseName, StructName>::Wrap(
StructName* s) {
if (!s)
return nullptr;
// Wrap their structure with the CefCToCppRefCounted object.
WrapperStruct* wrapperStruct = new WrapperStruct;
wrapperStruct->type_ = kWrapperType;
wrapperStruct->struct_ = s;
// Put the wrapper object in a smart pointer.
CefRefPtr<BaseName> wrapperPtr(&wrapperStruct->wrapper_);
// Release the reference that was added to the CefCppToC wrapper object on
// the other side before their structure was passed to us.
wrapperStruct->wrapper_.UnderlyingRelease();
// Return the smart pointer.
return wrapperPtr;
}
template <class ClassName, class BaseName, class StructName>
StructName* CefCToCppRefCounted<ClassName, BaseName, StructName>::Unwrap(
CefRefPtr<BaseName> c) {
if (!c.get())
return nullptr;
WrapperStruct* wrapperStruct = GetWrapperStruct(c.get());
// If the type does not match this object then we need to unwrap as the
// derived type.
if (wrapperStruct->type_ != kWrapperType)
return UnwrapDerived(wrapperStruct->type_, c.get());
// Add a reference to the CefCppToC wrapper object on the other side that
// will be released once the structure is received.
wrapperStruct->wrapper_.UnderlyingAddRef();
// Return their original structure.
return wrapperStruct->struct_;
}
template <class ClassName, class BaseName, class StructName>
bool CefCToCppRefCounted<ClassName, BaseName, StructName>::Release() const {
UnderlyingRelease();
if (ref_count_.Release()) {
WrapperStruct* wrapperStruct = GetWrapperStruct(this);
// Verify that the wrapper offset was calculated correctly.
DCHECK_EQ(kWrapperType, wrapperStruct->type_);
delete wrapperStruct;
return true;
}
return false;
}
template <class ClassName, class BaseName, class StructName>
typename CefCToCppRefCounted<ClassName, BaseName, StructName>::WrapperStruct*
CefCToCppRefCounted<ClassName, BaseName, StructName>::GetWrapperStruct(
const BaseName* obj) {
// Offset using the WrapperStruct size instead of individual member sizes to
// avoid problems due to platform/compiler differences in structure padding.
return reinterpret_cast<WrapperStruct*>(
reinterpret_cast<char*>(const_cast<BaseName*>(obj)) -
(sizeof(WrapperStruct) - sizeof(ClassName)));
}
#endif // CEF_LIBCEF_DLL_CTOCPP_CTOCPP_REF_COUNTED_H_