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1 // Copyright 2016 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef MojoHelper_h | |
6 #define MojoHelper_h | |
7 | |
8 #include "base/bind.h" | |
9 #include "mojo/public/cpp/bindings/callback.h" | |
10 #include "mojo/public/cpp/bindings/wtf_array.h" | |
11 #include "platform/heap/HeapAllocator.h" | |
12 #include <utility> | |
13 | |
14 namespace blink { | |
15 | |
16 namespace internal { | |
17 | |
18 template <typename R, typename... Args> | |
19 R CallWTFFunction(Function<R(Args...)>* functor, Args... args) | |
20 { | |
21 return (*functor)(std::forward<Args>(args)...); | |
22 } | |
23 | |
24 } | |
25 | |
26 // Binds an instance of a class to its member function. Does not bind anything | |
27 // else. Provides limited access to base::Bind() function. base::Bind() could | |
28 // be dangerous if it's used across threads, so we don't want to allow general | |
29 // use of base::Bind(). See also "platform/ThreadSafeFunctional.h". | |
30 template <typename Class, typename ReturnType, typename... Args> | |
31 mojo::Callback<ReturnType(Args...)> | |
32 sameThreadBindForMojo(ReturnType (Class::*method)(Args...), Class* instance) | |
33 { | |
34 return base::Bind(method, base::Unretained(instance)); | |
35 } | |
36 | |
37 template <typename R, typename... Args> | |
38 base::Callback<R(Args...)> createBaseCallback(PassOwnPtr<Function<R(Args...)>> f
unctor) | |
39 { | |
40 return base::Bind(&internal::CallWTFFunction<R, Args...>, base::Owned(functo
r.leakPtr())); | |
41 } | |
42 | |
43 } // namespace blink | |
44 | |
45 namespace mojo { | |
46 | |
47 // A |TypeConverter| that will create a |WTFArray<T>| containing a copy of the | |
48 // contents of a |blink::HeapVector<E>|, using |TypeConverter<T, E>| to copy | |
49 // each element. The returned array will always be non-null. | |
50 template <typename T, typename E> | |
51 struct TypeConverter<WTFArray<T>, blink::HeapVector<E>> { | |
52 static WTFArray<T> Convert(const blink::HeapVector<E>& input) | |
53 { | |
54 WTFArray<T> result(input.size()); | |
55 for (size_t i = 0; i < input.size(); ++i) | |
56 result[i] = TypeConverter<T, E>::Convert(input[i]); | |
57 return std::move(result); | |
58 } | |
59 }; | |
60 | |
61 } // namespace mojo | |
62 | |
63 #endif // MojoHelper_h | |
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