blob: 020357d12fda7d938eee7620f70f25ccfbd8086b [file] [log] [blame]
// This file was GENERATED by command:
// pump.py function_template.h.pump
// DO NOT EDIT BY HAND!!!
#ifndef GIN_FUNCTION_TEMPLATE_H_
#define GIN_FUNCTION_TEMPLATE_H_
// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/callback.h"
#include "base/logging.h"
#include "gin/arguments.h"
#include "gin/converter.h"
#include "gin/public/gin_embedders.h"
#include "gin/public/wrapper_info.h"
#include "gin/wrappable.h"
#include "v8/include/v8.h"
namespace gin {
class PerIsolateData;
namespace internal {
template<typename T>
struct RemoveConstRef {
typedef T Type;
};
template<typename T>
struct RemoveConstRef<const T&> {
typedef T Type;
};
// CallbackHolder and CallbackHolderBase are used to pass a base::Callback from
// CreateFunctionTemplate through v8 (via v8::FunctionTemplate) to
// DispatchToCallback, where it is invoked.
//
// v8::FunctionTemplate only supports passing void* as data so how do we know
// when to delete the base::Callback? That's where CallbackHolderBase comes in.
// It inherits from Wrappable, which delete itself when both (a) the refcount
// via base::RefCounted has dropped to zero, and (b) there are no more
// JavaScript references in V8.
class CallbackHolderBase : public Wrappable {
public:
virtual WrapperInfo* GetWrapperInfo() OVERRIDE;
static WrapperInfo kWrapperInfo;
protected:
virtual ~CallbackHolderBase() {}
};
template<typename Sig>
class CallbackHolder : public CallbackHolderBase {
public:
CallbackHolder(const base::Callback<Sig>& callback)
: callback(callback) {}
base::Callback<Sig> callback;
private:
virtual ~CallbackHolder() {}
};
// This set of templates invokes a base::Callback, converts the return type to a
// JavaScript value, and returns that value to script via the provided
// gin::Arguments object.
//
// In C++, you can declare the function foo(void), but you can't pass a void
// expression to foo. As a result, we must specialize the case of Callbacks that
// have the void return type.
template<typename R, typename P1 = void, typename P2 = void,
typename P3 = void, typename P4 = void>
struct Invoker {
inline static void Go(
Arguments* args,
const base::Callback<R(P1, P2, P3, P4)>& callback,
const P1& a1,
const P2& a2,
const P3& a3,
const P4& a4) {
args->Return(callback.Run(a1, a2, a3, a4));
}
};
template<typename P1, typename P2, typename P3, typename P4>
struct Invoker<void, P1, P2, P3, P4> {
inline static void Go(
Arguments* args,
const base::Callback<void(P1, P2, P3, P4)>& callback,
const P1& a1,
const P2& a2,
const P3& a3,
const P4& a4) {
callback.Run(a1, a2, a3, a4);
}
};
template<typename R, typename P1, typename P2, typename P3>
struct Invoker<R, P1, P2, P3, void> {
inline static void Go(
Arguments* args,
const base::Callback<R(P1, P2, P3)>& callback,
const P1& a1,
const P2& a2,
const P3& a3) {
args->Return(callback.Run(a1, a2, a3));
}
};
template<typename P1, typename P2, typename P3>
struct Invoker<void, P1, P2, P3, void> {
inline static void Go(
Arguments* args,
const base::Callback<void(P1, P2, P3)>& callback,
const P1& a1,
const P2& a2,
const P3& a3) {
callback.Run(a1, a2, a3);
}
};
template<typename R, typename P1, typename P2>
struct Invoker<R, P1, P2, void, void> {
inline static void Go(
Arguments* args,
const base::Callback<R(P1, P2)>& callback,
const P1& a1,
const P2& a2) {
args->Return(callback.Run(a1, a2));
}
};
template<typename P1, typename P2>
struct Invoker<void, P1, P2, void, void> {
inline static void Go(
Arguments* args,
const base::Callback<void(P1, P2)>& callback,
const P1& a1,
const P2& a2) {
callback.Run(a1, a2);
}
};
template<typename R, typename P1>
struct Invoker<R, P1, void, void, void> {
inline static void Go(
Arguments* args,
const base::Callback<R(P1)>& callback,
const P1& a1) {
args->Return(callback.Run(a1));
}
};
template<typename P1>
struct Invoker<void, P1, void, void, void> {
inline static void Go(
Arguments* args,
const base::Callback<void(P1)>& callback,
const P1& a1) {
callback.Run(a1);
}
};
template<typename R>
struct Invoker<R, void, void, void, void> {
inline static void Go(
Arguments* args,
const base::Callback<R()>& callback) {
args->Return(callback.Run());
}
};
template<>
struct Invoker<void, void, void, void, void> {
inline static void Go(
Arguments* args,
const base::Callback<void()>& callback) {
callback.Run();
}
};
// DispatchToCallback converts all the JavaScript arguments to C++ types and
// invokes the base::Callback.
template<typename R>
static void DispatchToCallback(
const v8::FunctionCallbackInfo<v8::Value>& info) {
Arguments args(info);
CallbackHolderBase* holder_base = NULL;
CHECK(args.GetData(&holder_base));
typedef CallbackHolder<R()> HolderT;
HolderT* holder = static_cast<HolderT*>(holder_base);
Invoker<R>::Go(&args, holder->callback);
}
template<typename R, typename P1>
static void DispatchToCallback(
const v8::FunctionCallbackInfo<v8::Value>& info) {
Arguments args(info);
CallbackHolderBase* holder_base = NULL;
CHECK(args.GetData(&holder_base));
typedef CallbackHolder<R(P1)> HolderT;
HolderT* holder = static_cast<HolderT*>(holder_base);
typename RemoveConstRef<P1>::Type a1;
if (!args.GetNext(&a1)) {
args.ThrowError();
return;
}
Invoker<R, P1>::Go(&args, holder->callback, a1);
}
template<typename R, typename P1, typename P2>
static void DispatchToCallback(
const v8::FunctionCallbackInfo<v8::Value>& info) {
Arguments args(info);
CallbackHolderBase* holder_base = NULL;
CHECK(args.GetData(&holder_base));
typedef CallbackHolder<R(P1, P2)> HolderT;
HolderT* holder = static_cast<HolderT*>(holder_base);
typename RemoveConstRef<P1>::Type a1;
typename RemoveConstRef<P2>::Type a2;
if (!args.GetNext(&a1) ||
!args.GetNext(&a2)) {
args.ThrowError();
return;
}
Invoker<R, P1, P2>::Go(&args, holder->callback, a1, a2);
}
template<typename R, typename P1, typename P2, typename P3>
static void DispatchToCallback(
const v8::FunctionCallbackInfo<v8::Value>& info) {
Arguments args(info);
CallbackHolderBase* holder_base = NULL;
CHECK(args.GetData(&holder_base));
typedef CallbackHolder<R(P1, P2, P3)> HolderT;
HolderT* holder = static_cast<HolderT*>(holder_base);
typename RemoveConstRef<P1>::Type a1;
typename RemoveConstRef<P2>::Type a2;
typename RemoveConstRef<P3>::Type a3;
if (!args.GetNext(&a1) ||
!args.GetNext(&a2) ||
!args.GetNext(&a3)) {
args.ThrowError();
return;
}
Invoker<R, P1, P2, P3>::Go(&args, holder->callback, a1, a2, a3);
}
template<typename R, typename P1, typename P2, typename P3, typename P4>
static void DispatchToCallback(
const v8::FunctionCallbackInfo<v8::Value>& info) {
Arguments args(info);
CallbackHolderBase* holder_base = NULL;
CHECK(args.GetData(&holder_base));
typedef CallbackHolder<R(P1, P2, P3, P4)> HolderT;
HolderT* holder = static_cast<HolderT*>(holder_base);
typename RemoveConstRef<P1>::Type a1;
typename RemoveConstRef<P2>::Type a2;
typename RemoveConstRef<P3>::Type a3;
typename RemoveConstRef<P4>::Type a4;
if (!args.GetNext(&a1) ||
!args.GetNext(&a2) ||
!args.GetNext(&a3) ||
!args.GetNext(&a4)) {
args.ThrowError();
return;
}
Invoker<R, P1, P2, P3, P4>::Go(&args, holder->callback, a1, a2, a3, a4);
}
} // namespace internal
// This should be called once per-isolate to initialize the function template
// system.
void InitFunctionTemplates(PerIsolateData* isolate_data);
// This has to be outside the internal namespace because template
// specializations must be declared in the same namespace as the original
// template.
template<>
struct Converter<internal::CallbackHolderBase*>
: public WrappableConverter<internal::CallbackHolderBase> {};
// Creates a v8::FunctionTemplate that will run the provided base::Callback each
// time it is called. JavaScript arguments and return values are converted via
// gin::Converter.
template<typename R>
v8::Local<v8::FunctionTemplate> CreateFunctionTemplate(
v8::Isolate* isolate,
const base::Callback<R()> callback) {
typedef internal::CallbackHolder<R()> HolderT;
scoped_refptr<HolderT> holder(new HolderT(callback));
return v8::FunctionTemplate::New(
&internal::DispatchToCallback<R>,
ConvertToV8<internal::CallbackHolderBase*>(isolate, holder.get()));
}
template<typename R, typename P1>
v8::Local<v8::FunctionTemplate> CreateFunctionTemplate(
v8::Isolate* isolate,
const base::Callback<R(P1)> callback) {
typedef internal::CallbackHolder<R(P1)> HolderT;
scoped_refptr<HolderT> holder(new HolderT(callback));
return v8::FunctionTemplate::New(
&internal::DispatchToCallback<R, P1>,
ConvertToV8<internal::CallbackHolderBase*>(isolate, holder.get()));
}
template<typename R, typename P1, typename P2>
v8::Local<v8::FunctionTemplate> CreateFunctionTemplate(
v8::Isolate* isolate,
const base::Callback<R(P1, P2)> callback) {
typedef internal::CallbackHolder<R(P1, P2)> HolderT;
scoped_refptr<HolderT> holder(new HolderT(callback));
return v8::FunctionTemplate::New(
&internal::DispatchToCallback<R, P1, P2>,
ConvertToV8<internal::CallbackHolderBase*>(isolate, holder.get()));
}
template<typename R, typename P1, typename P2, typename P3>
v8::Local<v8::FunctionTemplate> CreateFunctionTemplate(
v8::Isolate* isolate,
const base::Callback<R(P1, P2, P3)> callback) {
typedef internal::CallbackHolder<R(P1, P2, P3)> HolderT;
scoped_refptr<HolderT> holder(new HolderT(callback));
return v8::FunctionTemplate::New(
&internal::DispatchToCallback<R, P1, P2, P3>,
ConvertToV8<internal::CallbackHolderBase*>(isolate, holder.get()));
}
template<typename R, typename P1, typename P2, typename P3, typename P4>
v8::Local<v8::FunctionTemplate> CreateFunctionTemplate(
v8::Isolate* isolate,
const base::Callback<R(P1, P2, P3, P4)> callback) {
typedef internal::CallbackHolder<R(P1, P2, P3, P4)> HolderT;
scoped_refptr<HolderT> holder(new HolderT(callback));
return v8::FunctionTemplate::New(
&internal::DispatchToCallback<R, P1, P2, P3, P4>,
ConvertToV8<internal::CallbackHolderBase*>(isolate, holder.get()));
}
} // namespace gin
#endif // GIN_FUNCTION_TEMPLATE_H_