| // This file was GENERATED by command: | |
| // pump.py callback.h.pump | |
| // DO NOT EDIT BY HAND!!! | |
| // Copyright (c) 2012 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. | |
| #ifndef BASE_CALLBACK_H_ | |
| #define BASE_CALLBACK_H_ | |
| #include "base/callback_forward.h" | |
| #include "base/callback_internal.h" | |
| #include "base/template_util.h" | |
| // NOTE: Header files that do not require the full definition of Callback or | |
| // Closure should #include "base/callback_forward.h" instead of this file. | |
| // ----------------------------------------------------------------------------- | |
| // Introduction | |
| // ----------------------------------------------------------------------------- | |
| // | |
| // The templated Callback class is a generalized function object. Together | |
| // with the Bind() function in bind.h, they provide a type-safe method for | |
| // performing partial application of functions. | |
| // | |
| // Partial application (or "currying") is the process of binding a subset of | |
| // a function's arguments to produce another function that takes fewer | |
| // arguments. This can be used to pass around a unit of delayed execution, | |
| // much like lexical closures are used in other languages. For example, it | |
| // is used in Chromium code to schedule tasks on different MessageLoops. | |
| // | |
| // A callback with no unbound input parameters (base::Callback<void(void)>) | |
| // is called a base::Closure. Note that this is NOT the same as what other | |
| // languages refer to as a closure -- it does not retain a reference to its | |
| // enclosing environment. | |
| // | |
| // MEMORY MANAGEMENT AND PASSING | |
| // | |
| // The Callback objects themselves should be passed by const-reference, and | |
| // stored by copy. They internally store their state via a refcounted class | |
| // and thus do not need to be deleted. | |
| // | |
| // The reason to pass via a const-reference is to avoid unnecessary | |
| // AddRef/Release pairs to the internal state. | |
| // | |
| // | |
| // ----------------------------------------------------------------------------- | |
| // Quick reference for basic stuff | |
| // ----------------------------------------------------------------------------- | |
| // | |
| // BINDING A BARE FUNCTION | |
| // | |
| // int Return5() { return 5; } | |
| // base::Callback<int(void)> func_cb = base::Bind(&Return5); | |
| // LOG(INFO) << func_cb.Run(); // Prints 5. | |
| // | |
| // BINDING A CLASS METHOD | |
| // | |
| // The first argument to bind is the member function to call, the second is | |
| // the object on which to call it. | |
| // | |
| // class Ref : public base::RefCountedThreadSafe<Ref> { | |
| // public: | |
| // int Foo() { return 3; } | |
| // void PrintBye() { LOG(INFO) << "bye."; } | |
| // }; | |
| // scoped_refptr<Ref> ref = new Ref(); | |
| // base::Callback<void(void)> ref_cb = base::Bind(&Ref::Foo, ref); | |
| // LOG(INFO) << ref_cb.Run(); // Prints out 3. | |
| // | |
| // By default the object must support RefCounted or you will get a compiler | |
| // error. If you're passing between threads, be sure it's | |
| // RefCountedThreadSafe! See "Advanced binding of member functions" below if | |
| // you don't want to use reference counting. | |
| // | |
| // RUNNING A CALLBACK | |
| // | |
| // Callbacks can be run with their "Run" method, which has the same | |
| // signature as the template argument to the callback. | |
| // | |
| // void DoSomething(const base::Callback<void(int, std::string)>& callback) { | |
| // callback.Run(5, "hello"); | |
| // } | |
| // | |
| // Callbacks can be run more than once (they don't get deleted or marked when | |
| // run). However, this precludes using base::Passed (see below). | |
| // | |
| // void DoSomething(const base::Callback<double(double)>& callback) { | |
| // double myresult = callback.Run(3.14159); | |
| // myresult += callback.Run(2.71828); | |
| // } | |
| // | |
| // PASSING UNBOUND INPUT PARAMETERS | |
| // | |
| // Unbound parameters are specified at the time a callback is Run(). They are | |
| // specified in the Callback template type: | |
| // | |
| // void MyFunc(int i, const std::string& str) {} | |
| // base::Callback<void(int, const std::string&)> cb = base::Bind(&MyFunc); | |
| // cb.Run(23, "hello, world"); | |
| // | |
| // PASSING BOUND INPUT PARAMETERS | |
| // | |
| // Bound parameters are specified when you create thee callback as arguments | |
| // to Bind(). They will be passed to the function and the Run()ner of the | |
| // callback doesn't see those values or even know that the function it's | |
| // calling. | |
| // | |
| // void MyFunc(int i, const std::string& str) {} | |
| // base::Callback<void(void)> cb = base::Bind(&MyFunc, 23, "hello world"); | |
| // cb.Run(); | |
| // | |
| // A callback with no unbound input parameters (base::Callback<void(void)>) | |
| // is called a base::Closure. So we could have also written: | |
| // | |
| // base::Closure cb = base::Bind(&MyFunc, 23, "hello world"); | |
| // | |
| // When calling member functions, bound parameters just go after the object | |
| // pointer. | |
| // | |
| // base::Closure cb = base::Bind(&MyClass::MyFunc, this, 23, "hello world"); | |
| // | |
| // PARTIAL BINDING OF PARAMETERS | |
| // | |
| // You can specify some parameters when you create the callback, and specify | |
| // the rest when you execute the callback. | |
| // | |
| // void MyFunc(int i, const std::string& str) {} | |
| // base::Callback<void(const std::string&)> cb = base::Bind(&MyFunc, 23); | |
| // cb.Run("hello world"); | |
| // | |
| // When calling a function bound parameters are first, followed by unbound | |
| // parameters. | |
| // | |
| // | |
| // ----------------------------------------------------------------------------- | |
| // Quick reference for advanced binding | |
| // ----------------------------------------------------------------------------- | |
| // | |
| // BINDING A CLASS METHOD WITH WEAK POINTERS | |
| // | |
| // base::Bind(&MyClass::Foo, GetWeakPtr()); | |
| // | |
| // The callback will not be issued if the object is destroyed at the time | |
| // it's issued. DANGER: weak pointers are not threadsafe, so don't use this | |
| // when passing between threads! | |
| // | |
| // BINDING A CLASS METHOD WITH MANUAL LIFETIME MANAGEMENT | |
| // | |
| // base::Bind(&MyClass::Foo, base::Unretained(this)); | |
| // | |
| // This disables all lifetime management on the object. You're responsible | |
| // for making sure the object is alive at the time of the call. You break it, | |
| // you own it! | |
| // | |
| // BINDING A CLASS METHOD AND HAVING THE CALLBACK OWN THE CLASS | |
| // | |
| // MyClass* myclass = new MyClass; | |
| // base::Bind(&MyClass::Foo, base::Owned(myclass)); | |
| // | |
| // The object will be deleted when the callback is destroyed, even if it's | |
| // not run (like if you post a task during shutdown). Potentially useful for | |
| // "fire and forget" cases. | |
| // | |
| // IGNORING RETURN VALUES | |
| // | |
| // Sometimes you want to call a function that returns a value in a callback | |
| // that doesn't expect a return value. | |
| // | |
| // int DoSomething(int arg) { cout << arg << endl; } | |
| // base::Callback<void<int>) cb = | |
| // base::Bind(base::IgnoreResult(&DoSomething)); | |
| // | |
| // | |
| // ----------------------------------------------------------------------------- | |
| // Quick reference for binding parameters to Bind() | |
| // ----------------------------------------------------------------------------- | |
| // | |
| // Bound parameters are specified as arguments to Bind() and are passed to the | |
| // function. A callback with no parameters or no unbound parameters is called a | |
| // Closure (base::Callback<void(void)> and base::Closure are the same thing). | |
| // | |
| // PASSING PARAMETERS OWNED BY THE CALLBACK | |
| // | |
| // void Foo(int* arg) { cout << *arg << endl; } | |
| // int* pn = new int(1); | |
| // base::Closure foo_callback = base::Bind(&foo, base::Owned(pn)); | |
| // | |
| // The parameter will be deleted when the callback is destroyed, even if it's | |
| // not run (like if you post a task during shutdown). | |
| // | |
| // PASSING PARAMETERS AS A scoped_ptr | |
| // | |
| // void TakesOwnership(scoped_ptr<Foo> arg) {} | |
| // scoped_ptr<Foo> f(new Foo); | |
| // // f becomes null during the following call. | |
| // base::Closure cb = base::Bind(&TakesOwnership, base::Passed(&f)); | |
| // | |
| // Ownership of the parameter will be with the callback until the it is run, | |
| // when ownership is passed to the callback function. This means the callback | |
| // can only be run once. If the callback is never run, it will delete the | |
| // object when it's destroyed. | |
| // | |
| // PASSING PARAMETERS AS A scoped_refptr | |
| // | |
| // void TakesOneRef(scoped_refptr<Foo> arg) {} | |
| // scoped_refptr<Foo> f(new Foo) | |
| // base::Closure cb = base::Bind(&TakesOneRef, f); | |
| // | |
| // This should "just work." The closure will take a reference as long as it | |
| // is alive, and another reference will be taken for the called function. | |
| // | |
| // PASSING PARAMETERS BY REFERENCE | |
| // | |
| // void foo(int arg) { cout << arg << endl } | |
| // int n = 1; | |
| // base::Closure has_ref = base::Bind(&foo, base::ConstRef(n)); | |
| // n = 2; | |
| // has_ref.Run(); // Prints "2" | |
| // | |
| // Normally parameters are copied in the closure. DANGER: ConstRef stores a | |
| // const reference instead, referencing the original parameter. This means | |
| // that you must ensure the object outlives the callback! | |
| // | |
| // | |
| // ----------------------------------------------------------------------------- | |
| // Implementation notes | |
| // ----------------------------------------------------------------------------- | |
| // | |
| // WHERE IS THIS DESIGN FROM: | |
| // | |
| // The design Callback and Bind is heavily influenced by C++'s | |
| // tr1::function/tr1::bind, and by the "Google Callback" system used inside | |
| // Google. | |
| // | |
| // | |
| // HOW THE IMPLEMENTATION WORKS: | |
| // | |
| // There are three main components to the system: | |
| // 1) The Callback classes. | |
| // 2) The Bind() functions. | |
| // 3) The arguments wrappers (e.g., Unretained() and ConstRef()). | |
| // | |
| // The Callback classes represent a generic function pointer. Internally, | |
| // it stores a refcounted piece of state that represents the target function | |
| // and all its bound parameters. Each Callback specialization has a templated | |
| // constructor that takes an BindState<>*. In the context of the constructor, | |
| // the static type of this BindState<> pointer uniquely identifies the | |
| // function it is representing, all its bound parameters, and a Run() method | |
| // that is capable of invoking the target. | |
| // | |
| // Callback's constructor takes the BindState<>* that has the full static type | |
| // and erases the target function type as well as the types of the bound | |
| // parameters. It does this by storing a pointer to the specific Run() | |
| // function, and upcasting the state of BindState<>* to a | |
| // BindStateBase*. This is safe as long as this BindStateBase pointer | |
| // is only used with the stored Run() pointer. | |
| // | |
| // To BindState<> objects are created inside the Bind() functions. | |
| // These functions, along with a set of internal templates, are responsible for | |
| // | |
| // - Unwrapping the function signature into return type, and parameters | |
| // - Determining the number of parameters that are bound | |
| // - Creating the BindState storing the bound parameters | |
| // - Performing compile-time asserts to avoid error-prone behavior | |
| // - Returning an Callback<> with an arity matching the number of unbound | |
| // parameters and that knows the correct refcounting semantics for the | |
| // target object if we are binding a method. | |
| // | |
| // The Bind functions do the above using type-inference, and template | |
| // specializations. | |
| // | |
| // By default Bind() will store copies of all bound parameters, and attempt | |
| // to refcount a target object if the function being bound is a class method. | |
| // These copies are created even if the function takes parameters as const | |
| // references. (Binding to non-const references is forbidden, see bind.h.) | |
| // | |
| // To change this behavior, we introduce a set of argument wrappers | |
| // (e.g., Unretained(), and ConstRef()). These are simple container templates | |
| // that are passed by value, and wrap a pointer to argument. See the | |
| // file-level comment in base/bind_helpers.h for more info. | |
| // | |
| // These types are passed to the Unwrap() functions, and the MaybeRefcount() | |
| // functions respectively to modify the behavior of Bind(). The Unwrap() | |
| // and MaybeRefcount() functions change behavior by doing partial | |
| // specialization based on whether or not a parameter is a wrapper type. | |
| // | |
| // ConstRef() is similar to tr1::cref. Unretained() is specific to Chromium. | |
| // | |
| // | |
| // WHY NOT TR1 FUNCTION/BIND? | |
| // | |
| // Direct use of tr1::function and tr1::bind was considered, but ultimately | |
| // rejected because of the number of copy constructors invocations involved | |
| // in the binding of arguments during construction, and the forwarding of | |
| // arguments during invocation. These copies will no longer be an issue in | |
| // C++0x because C++0x will support rvalue reference allowing for the compiler | |
| // to avoid these copies. However, waiting for C++0x is not an option. | |
| // | |
| // Measured with valgrind on gcc version 4.4.3 (Ubuntu 4.4.3-4ubuntu5), the | |
| // tr1::bind call itself will invoke a non-trivial copy constructor three times | |
| // for each bound parameter. Also, each when passing a tr1::function, each | |
| // bound argument will be copied again. | |
| // | |
| // In addition to the copies taken at binding and invocation, copying a | |
| // tr1::function causes a copy to be made of all the bound parameters and | |
| // state. | |
| // | |
| // Furthermore, in Chromium, it is desirable for the Callback to take a | |
| // reference on a target object when representing a class method call. This | |
| // is not supported by tr1. | |
| // | |
| // Lastly, tr1::function and tr1::bind has a more general and flexible API. | |
| // This includes things like argument reordering by use of | |
| // tr1::bind::placeholder, support for non-const reference parameters, and some | |
| // limited amount of subtyping of the tr1::function object (e.g., | |
| // tr1::function<int(int)> is convertible to tr1::function<void(int)>). | |
| // | |
| // These are not features that are required in Chromium. Some of them, such as | |
| // allowing for reference parameters, and subtyping of functions, may actually | |
| // become a source of errors. Removing support for these features actually | |
| // allows for a simpler implementation, and a terser Currying API. | |
| // | |
| // | |
| // WHY NOT GOOGLE CALLBACKS? | |
| // | |
| // The Google callback system also does not support refcounting. Furthermore, | |
| // its implementation has a number of strange edge cases with respect to type | |
| // conversion of its arguments. In particular, the argument's constness must | |
| // at times match exactly the function signature, or the type-inference might | |
| // break. Given the above, writing a custom solution was easier. | |
| // | |
| // | |
| // MISSING FUNCTIONALITY | |
| // - Invoking the return of Bind. Bind(&foo).Run() does not work; | |
| // - Binding arrays to functions that take a non-const pointer. | |
| // Example: | |
| // void Foo(const char* ptr); | |
| // void Bar(char* ptr); | |
| // Bind(&Foo, "test"); | |
| // Bind(&Bar, "test"); // This fails because ptr is not const. | |
| namespace base { | |
| // First, we forward declare the Callback class template. This informs the | |
| // compiler that the template only has 1 type parameter which is the function | |
| // signature that the Callback is representing. | |
| // | |
| // After this, create template specializations for 0-7 parameters. Note that | |
| // even though the template typelist grows, the specialization still | |
| // only has one type: the function signature. | |
| // | |
| // If you are thinking of forward declaring Callback in your own header file, | |
| // please include "base/callback_forward.h" instead. | |
| template <typename Sig> | |
| class Callback; | |
| namespace internal { | |
| template <typename Runnable, typename RunType, typename BoundArgsType> | |
| struct BindState; | |
| } // namespace internal | |
| template <typename R> | |
| class Callback<R(void)> : public internal::CallbackBase { | |
| public: | |
| typedef R(RunType)(); | |
| Callback() : CallbackBase(NULL) { } | |
| // Note that this constructor CANNOT be explicit, and that Bind() CANNOT | |
| // return the exact Callback<> type. See base/bind.h for details. | |
| template <typename Runnable, typename BindRunType, typename BoundArgsType> | |
| Callback(internal::BindState<Runnable, BindRunType, | |
| BoundArgsType>* bind_state) | |
| : CallbackBase(bind_state) { | |
| // Force the assignment to a local variable of PolymorphicInvoke | |
| // so the compiler will typecheck that the passed in Run() method has | |
| // the correct type. | |
| PolymorphicInvoke invoke_func = | |
| &internal::BindState<Runnable, BindRunType, BoundArgsType> | |
| ::InvokerType::Run; | |
| #if defined(COBALT_WIN) | |
| #pragma warning(push) | |
| #pragma warning(disable : 4191) // Calling this function through the result | |
| // pointer may cause your program to fail. | |
| #endif | |
| polymorphic_invoke_ = reinterpret_cast<InvokeFuncStorage>(invoke_func); | |
| #if defined(COBALT_WIN) | |
| #pragma warning(pop) | |
| #endif | |
| } | |
| bool Equals(const Callback& other) const { | |
| return CallbackBase::Equals(other); | |
| } | |
| R Run() const { | |
| #if defined(COBALT_WIN) | |
| #pragma warning(push) | |
| #pragma warning(disable : 4191) // Calling this function through the result | |
| // pointer may cause your program to fail. | |
| #endif | |
| PolymorphicInvoke f = | |
| reinterpret_cast<PolymorphicInvoke>(polymorphic_invoke_); | |
| #if defined(COBALT_WIN) | |
| #pragma warning(pop) | |
| #endif | |
| return f(bind_state_.get()); | |
| } | |
| private: | |
| typedef R(*PolymorphicInvoke)( | |
| internal::BindStateBase*); | |
| }; | |
| template <typename R, typename A1> | |
| class Callback<R(A1)> : public internal::CallbackBase { | |
| public: | |
| typedef R(RunType)(A1); | |
| Callback() : CallbackBase(NULL) { } | |
| // Note that this constructor CANNOT be explicit, and that Bind() CANNOT | |
| // return the exact Callback<> type. See base/bind.h for details. | |
| template <typename Runnable, typename BindRunType, typename BoundArgsType> | |
| Callback(internal::BindState<Runnable, BindRunType, | |
| BoundArgsType>* bind_state) | |
| : CallbackBase(bind_state) { | |
| // Force the assignment to a local variable of PolymorphicInvoke | |
| // so the compiler will typecheck that the passed in Run() method has | |
| // the correct type. | |
| PolymorphicInvoke invoke_func = | |
| &internal::BindState<Runnable, BindRunType, BoundArgsType> | |
| ::InvokerType::Run; | |
| #if defined(COBALT_WIN) | |
| #pragma warning(push) | |
| #pragma warning(disable : 4191) // Calling this function through the result | |
| // pointer may cause your program to fail. | |
| #endif | |
| polymorphic_invoke_ = reinterpret_cast<InvokeFuncStorage>(invoke_func); | |
| #if defined(COBALT_WIN) | |
| #pragma warning(pop) | |
| #endif | |
| } | |
| bool Equals(const Callback& other) const { | |
| return CallbackBase::Equals(other); | |
| } | |
| R Run(typename internal::CallbackParamTraits<A1>::ForwardType a1) const { | |
| #if defined(COBALT_WIN) | |
| #pragma warning(push) | |
| #pragma warning(disable : 4191) // Calling this function through the result | |
| // pointer may cause your program to fail. | |
| #endif | |
| PolymorphicInvoke f = | |
| reinterpret_cast<PolymorphicInvoke>(polymorphic_invoke_); | |
| #if defined(COBALT_WIN) | |
| #pragma warning(pop) | |
| #endif | |
| return f(bind_state_.get(), internal::CallbackForward(a1)); | |
| } | |
| private: | |
| typedef R(*PolymorphicInvoke)( | |
| internal::BindStateBase*, | |
| typename internal::CallbackParamTraits<A1>::ForwardType); | |
| }; | |
| template <typename R, typename A1, typename A2> | |
| class Callback<R(A1, A2)> : public internal::CallbackBase { | |
| public: | |
| typedef R(RunType)(A1, A2); | |
| Callback() : CallbackBase(NULL) { } | |
| // Note that this constructor CANNOT be explicit, and that Bind() CANNOT | |
| // return the exact Callback<> type. See base/bind.h for details. | |
| template <typename Runnable, typename BindRunType, typename BoundArgsType> | |
| Callback(internal::BindState<Runnable, BindRunType, | |
| BoundArgsType>* bind_state) | |
| : CallbackBase(bind_state) { | |
| // Force the assignment to a local variable of PolymorphicInvoke | |
| // so the compiler will typecheck that the passed in Run() method has | |
| // the correct type. | |
| PolymorphicInvoke invoke_func = | |
| &internal::BindState<Runnable, BindRunType, BoundArgsType> | |
| ::InvokerType::Run; | |
| #if defined(COBALT_WIN) | |
| #pragma warning(push) | |
| #pragma warning(disable : 4191) // Calling this function through the result | |
| // pointer may cause your program to fail. | |
| #endif | |
| polymorphic_invoke_ = reinterpret_cast<InvokeFuncStorage>(invoke_func); | |
| #if defined(COBALT_WIN) | |
| #pragma warning(pop) | |
| #endif | |
| } | |
| bool Equals(const Callback& other) const { | |
| return CallbackBase::Equals(other); | |
| } | |
| R Run(typename internal::CallbackParamTraits<A1>::ForwardType a1, | |
| typename internal::CallbackParamTraits<A2>::ForwardType a2) const { | |
| #if defined(COBALT_WIN) | |
| #pragma warning(push) | |
| #pragma warning(disable : 4191) // Calling this function through the result | |
| // pointer may cause your program to fail. | |
| #endif | |
| PolymorphicInvoke f = | |
| reinterpret_cast<PolymorphicInvoke>(polymorphic_invoke_); | |
| #if defined(COBALT_WIN) | |
| #pragma warning(pop) | |
| #endif | |
| return f(bind_state_.get(), internal::CallbackForward(a1), | |
| internal::CallbackForward(a2)); | |
| } | |
| private: | |
| typedef R(*PolymorphicInvoke)( | |
| internal::BindStateBase*, | |
| typename internal::CallbackParamTraits<A1>::ForwardType, | |
| typename internal::CallbackParamTraits<A2>::ForwardType); | |
| }; | |
| template <typename R, typename A1, typename A2, typename A3> | |
| class Callback<R(A1, A2, A3)> : public internal::CallbackBase { | |
| public: | |
| typedef R(RunType)(A1, A2, A3); | |
| Callback() : CallbackBase(NULL) { } | |
| // Note that this constructor CANNOT be explicit, and that Bind() CANNOT | |
| // return the exact Callback<> type. See base/bind.h for details. | |
| template <typename Runnable, typename BindRunType, typename BoundArgsType> | |
| Callback(internal::BindState<Runnable, BindRunType, | |
| BoundArgsType>* bind_state) | |
| : CallbackBase(bind_state) { | |
| // Force the assignment to a local variable of PolymorphicInvoke | |
| // so the compiler will typecheck that the passed in Run() method has | |
| // the correct type. | |
| PolymorphicInvoke invoke_func = | |
| &internal::BindState<Runnable, BindRunType, BoundArgsType> | |
| ::InvokerType::Run; | |
| #if defined(COBALT_WIN) | |
| #pragma warning(push) | |
| #pragma warning(disable : 4191) // Calling this function through the result | |
| // pointer may cause your program to fail. | |
| #endif | |
| polymorphic_invoke_ = reinterpret_cast<InvokeFuncStorage>(invoke_func); | |
| #if defined(COBALT_WIN) | |
| #pragma warning(pop) | |
| #endif | |
| } | |
| bool Equals(const Callback& other) const { | |
| return CallbackBase::Equals(other); | |
| } | |
| R Run(typename internal::CallbackParamTraits<A1>::ForwardType a1, | |
| typename internal::CallbackParamTraits<A2>::ForwardType a2, | |
| typename internal::CallbackParamTraits<A3>::ForwardType a3) const { | |
| #if defined(COBALT_WIN) | |
| #pragma warning(push) | |
| #pragma warning(disable : 4191) // Calling this function through the result | |
| // pointer may cause your program to fail. | |
| #endif | |
| PolymorphicInvoke f = | |
| reinterpret_cast<PolymorphicInvoke>(polymorphic_invoke_); | |
| #if defined(COBALT_WIN) | |
| #pragma warning(pop) | |
| #endif | |
| return f(bind_state_.get(), internal::CallbackForward(a1), | |
| internal::CallbackForward(a2), | |
| internal::CallbackForward(a3)); | |
| } | |
| private: | |
| typedef R(*PolymorphicInvoke)( | |
| internal::BindStateBase*, | |
| typename internal::CallbackParamTraits<A1>::ForwardType, | |
| typename internal::CallbackParamTraits<A2>::ForwardType, | |
| typename internal::CallbackParamTraits<A3>::ForwardType); | |
| }; | |
| template <typename R, typename A1, typename A2, typename A3, typename A4> | |
| class Callback<R(A1, A2, A3, A4)> : public internal::CallbackBase { | |
| public: | |
| typedef R(RunType)(A1, A2, A3, A4); | |
| Callback() : CallbackBase(NULL) { } | |
| // Note that this constructor CANNOT be explicit, and that Bind() CANNOT | |
| // return the exact Callback<> type. See base/bind.h for details. | |
| template <typename Runnable, typename BindRunType, typename BoundArgsType> | |
| Callback(internal::BindState<Runnable, BindRunType, | |
| BoundArgsType>* bind_state) | |
| : CallbackBase(bind_state) { | |
| // Force the assignment to a local variable of PolymorphicInvoke | |
| // so the compiler will typecheck that the passed in Run() method has | |
| // the correct type. | |
| PolymorphicInvoke invoke_func = | |
| &internal::BindState<Runnable, BindRunType, BoundArgsType> | |
| ::InvokerType::Run; | |
| #if defined(COBALT_WIN) | |
| #pragma warning(push) | |
| #pragma warning(disable : 4191) // Calling this function through the result | |
| // pointer may cause your program to fail. | |
| #endif | |
| polymorphic_invoke_ = reinterpret_cast<InvokeFuncStorage>(invoke_func); | |
| #if defined(COBALT_WIN) | |
| #pragma warning(pop) | |
| #endif | |
| } | |
| bool Equals(const Callback& other) const { | |
| return CallbackBase::Equals(other); | |
| } | |
| R Run(typename internal::CallbackParamTraits<A1>::ForwardType a1, | |
| typename internal::CallbackParamTraits<A2>::ForwardType a2, | |
| typename internal::CallbackParamTraits<A3>::ForwardType a3, | |
| typename internal::CallbackParamTraits<A4>::ForwardType a4) const { | |
| #if defined(COBALT_WIN) | |
| #pragma warning(push) | |
| #pragma warning(disable : 4191) // Calling this function through the result | |
| // pointer may cause your program to fail. | |
| #endif | |
| PolymorphicInvoke f = | |
| reinterpret_cast<PolymorphicInvoke>(polymorphic_invoke_); | |
| #if defined(COBALT_WIN) | |
| #pragma warning(pop) | |
| #endif | |
| return f(bind_state_.get(), internal::CallbackForward(a1), | |
| internal::CallbackForward(a2), | |
| internal::CallbackForward(a3), | |
| internal::CallbackForward(a4)); | |
| } | |
| private: | |
| typedef R(*PolymorphicInvoke)( | |
| internal::BindStateBase*, | |
| typename internal::CallbackParamTraits<A1>::ForwardType, | |
| typename internal::CallbackParamTraits<A2>::ForwardType, | |
| typename internal::CallbackParamTraits<A3>::ForwardType, | |
| typename internal::CallbackParamTraits<A4>::ForwardType); | |
| }; | |
| template <typename R, typename A1, typename A2, typename A3, typename A4, | |
| typename A5> | |
| class Callback<R(A1, A2, A3, A4, A5)> : public internal::CallbackBase { | |
| public: | |
| typedef R(RunType)(A1, A2, A3, A4, A5); | |
| Callback() : CallbackBase(NULL) { } | |
| // Note that this constructor CANNOT be explicit, and that Bind() CANNOT | |
| // return the exact Callback<> type. See base/bind.h for details. | |
| template <typename Runnable, typename BindRunType, typename BoundArgsType> | |
| Callback(internal::BindState<Runnable, BindRunType, | |
| BoundArgsType>* bind_state) | |
| : CallbackBase(bind_state) { | |
| // Force the assignment to a local variable of PolymorphicInvoke | |
| // so the compiler will typecheck that the passed in Run() method has | |
| // the correct type. | |
| PolymorphicInvoke invoke_func = | |
| &internal::BindState<Runnable, BindRunType, BoundArgsType> | |
| ::InvokerType::Run; | |
| #if defined(COBALT_WIN) | |
| #pragma warning(push) | |
| #pragma warning(disable : 4191) // Calling this function through the result | |
| // pointer may cause your program to fail. | |
| #endif | |
| polymorphic_invoke_ = reinterpret_cast<InvokeFuncStorage>(invoke_func); | |
| #if defined(COBALT_WIN) | |
| #pragma warning(pop) | |
| #endif | |
| } | |
| bool Equals(const Callback& other) const { | |
| return CallbackBase::Equals(other); | |
| } | |
| R Run(typename internal::CallbackParamTraits<A1>::ForwardType a1, | |
| typename internal::CallbackParamTraits<A2>::ForwardType a2, | |
| typename internal::CallbackParamTraits<A3>::ForwardType a3, | |
| typename internal::CallbackParamTraits<A4>::ForwardType a4, | |
| typename internal::CallbackParamTraits<A5>::ForwardType a5) const { | |
| #if defined(COBALT_WIN) | |
| #pragma warning(push) | |
| #pragma warning(disable : 4191) // Calling this function through the result | |
| // pointer may cause your program to fail. | |
| #endif | |
| PolymorphicInvoke f = | |
| reinterpret_cast<PolymorphicInvoke>(polymorphic_invoke_); | |
| #if defined(COBALT_WIN) | |
| #pragma warning(pop) | |
| #endif | |
| return f(bind_state_.get(), internal::CallbackForward(a1), | |
| internal::CallbackForward(a2), | |
| internal::CallbackForward(a3), | |
| internal::CallbackForward(a4), | |
| internal::CallbackForward(a5)); | |
| } | |
| private: | |
| typedef R(*PolymorphicInvoke)( | |
| internal::BindStateBase*, | |
| typename internal::CallbackParamTraits<A1>::ForwardType, | |
| typename internal::CallbackParamTraits<A2>::ForwardType, | |
| typename internal::CallbackParamTraits<A3>::ForwardType, | |
| typename internal::CallbackParamTraits<A4>::ForwardType, | |
| typename internal::CallbackParamTraits<A5>::ForwardType); | |
| }; | |
| template <typename R, typename A1, typename A2, typename A3, typename A4, | |
| typename A5, typename A6> | |
| class Callback<R(A1, A2, A3, A4, A5, A6)> : public internal::CallbackBase { | |
| public: | |
| typedef R(RunType)(A1, A2, A3, A4, A5, A6); | |
| Callback() : CallbackBase(NULL) { } | |
| // Note that this constructor CANNOT be explicit, and that Bind() CANNOT | |
| // return the exact Callback<> type. See base/bind.h for details. | |
| template <typename Runnable, typename BindRunType, typename BoundArgsType> | |
| Callback(internal::BindState<Runnable, BindRunType, | |
| BoundArgsType>* bind_state) | |
| : CallbackBase(bind_state) { | |
| // Force the assignment to a local variable of PolymorphicInvoke | |
| // so the compiler will typecheck that the passed in Run() method has | |
| // the correct type. | |
| PolymorphicInvoke invoke_func = | |
| &internal::BindState<Runnable, BindRunType, BoundArgsType> | |
| ::InvokerType::Run; | |
| #if defined(COBALT_WIN) | |
| #pragma warning(push) | |
| #pragma warning(disable : 4191) // Calling this function through the result | |
| // pointer may cause your program to fail. | |
| #endif | |
| polymorphic_invoke_ = reinterpret_cast<InvokeFuncStorage>(invoke_func); | |
| #if defined(COBALT_WIN) | |
| #pragma warning(pop) | |
| #endif | |
| } | |
| bool Equals(const Callback& other) const { | |
| return CallbackBase::Equals(other); | |
| } | |
| R Run(typename internal::CallbackParamTraits<A1>::ForwardType a1, | |
| typename internal::CallbackParamTraits<A2>::ForwardType a2, | |
| typename internal::CallbackParamTraits<A3>::ForwardType a3, | |
| typename internal::CallbackParamTraits<A4>::ForwardType a4, | |
| typename internal::CallbackParamTraits<A5>::ForwardType a5, | |
| typename internal::CallbackParamTraits<A6>::ForwardType a6) const { | |
| #if defined(COBALT_WIN) | |
| #pragma warning(push) | |
| #pragma warning(disable : 4191) // Calling this function through the result | |
| // pointer may cause your program to fail. | |
| #endif | |
| PolymorphicInvoke f = | |
| reinterpret_cast<PolymorphicInvoke>(polymorphic_invoke_); | |
| #if defined(COBALT_WIN) | |
| #pragma warning(pop) | |
| #endif | |
| return f(bind_state_.get(), internal::CallbackForward(a1), | |
| internal::CallbackForward(a2), | |
| internal::CallbackForward(a3), | |
| internal::CallbackForward(a4), | |
| internal::CallbackForward(a5), | |
| internal::CallbackForward(a6)); | |
| } | |
| private: | |
| typedef R(*PolymorphicInvoke)( | |
| internal::BindStateBase*, | |
| typename internal::CallbackParamTraits<A1>::ForwardType, | |
| typename internal::CallbackParamTraits<A2>::ForwardType, | |
| typename internal::CallbackParamTraits<A3>::ForwardType, | |
| typename internal::CallbackParamTraits<A4>::ForwardType, | |
| typename internal::CallbackParamTraits<A5>::ForwardType, | |
| typename internal::CallbackParamTraits<A6>::ForwardType); | |
| }; | |
| template <typename R, typename A1, typename A2, typename A3, typename A4, | |
| typename A5, typename A6, typename A7> | |
| class Callback<R(A1, A2, A3, A4, A5, A6, A7)> : public internal::CallbackBase { | |
| public: | |
| typedef R(RunType)(A1, A2, A3, A4, A5, A6, A7); | |
| Callback() : CallbackBase(NULL) { } | |
| // Note that this constructor CANNOT be explicit, and that Bind() CANNOT | |
| // return the exact Callback<> type. See base/bind.h for details. | |
| template <typename Runnable, typename BindRunType, typename BoundArgsType> | |
| Callback(internal::BindState<Runnable, BindRunType, | |
| BoundArgsType>* bind_state) | |
| : CallbackBase(bind_state) { | |
| // Force the assignment to a local variable of PolymorphicInvoke | |
| // so the compiler will typecheck that the passed in Run() method has | |
| // the correct type. | |
| PolymorphicInvoke invoke_func = | |
| &internal::BindState<Runnable, BindRunType, BoundArgsType> | |
| ::InvokerType::Run; | |
| #if defined(COBALT_WIN) | |
| #pragma warning(push) | |
| #pragma warning(disable : 4191) // Calling this function through the result | |
| // pointer may cause your program to fail. | |
| #endif | |
| polymorphic_invoke_ = reinterpret_cast<InvokeFuncStorage>(invoke_func); | |
| #if defined(COBALT_WIN) | |
| #pragma warning(pop) | |
| #endif | |
| } | |
| bool Equals(const Callback& other) const { | |
| return CallbackBase::Equals(other); | |
| } | |
| R Run(typename internal::CallbackParamTraits<A1>::ForwardType a1, | |
| typename internal::CallbackParamTraits<A2>::ForwardType a2, | |
| typename internal::CallbackParamTraits<A3>::ForwardType a3, | |
| typename internal::CallbackParamTraits<A4>::ForwardType a4, | |
| typename internal::CallbackParamTraits<A5>::ForwardType a5, | |
| typename internal::CallbackParamTraits<A6>::ForwardType a6, | |
| typename internal::CallbackParamTraits<A7>::ForwardType a7) const { | |
| #if defined(COBALT_WIN) | |
| #pragma warning(push) | |
| #pragma warning(disable : 4191) // Calling this function through the result | |
| // pointer may cause your program to fail. | |
| #endif | |
| PolymorphicInvoke f = | |
| reinterpret_cast<PolymorphicInvoke>(polymorphic_invoke_); | |
| #if defined(COBALT_WIN) | |
| #pragma warning(pop) | |
| #endif | |
| return f(bind_state_.get(), internal::CallbackForward(a1), | |
| internal::CallbackForward(a2), | |
| internal::CallbackForward(a3), | |
| internal::CallbackForward(a4), | |
| internal::CallbackForward(a5), | |
| internal::CallbackForward(a6), | |
| internal::CallbackForward(a7)); | |
| } | |
| private: | |
| typedef R(*PolymorphicInvoke)( | |
| internal::BindStateBase*, | |
| typename internal::CallbackParamTraits<A1>::ForwardType, | |
| typename internal::CallbackParamTraits<A2>::ForwardType, | |
| typename internal::CallbackParamTraits<A3>::ForwardType, | |
| typename internal::CallbackParamTraits<A4>::ForwardType, | |
| typename internal::CallbackParamTraits<A5>::ForwardType, | |
| typename internal::CallbackParamTraits<A6>::ForwardType, | |
| typename internal::CallbackParamTraits<A7>::ForwardType); | |
| }; | |
| // Syntactic sugar to make Callbacks<void(void)> easier to declare since it | |
| // will be used in a lot of APIs with delayed execution. | |
| typedef Callback<void(void)> Closure; | |
| } // namespace base | |
| #endif // BASE_CALLBACK_H |