HidlPassthroughSupport.h revision 08607dcb2119d45381579682f1531e487c9414ad 
1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef ANDROID_HIDL_PASSTHROUGH_SUPPORT_H
18#define ANDROID_HIDL_PASSTHROUGH_SUPPORT_H
19
20#include <android/hidl/base/1.0/IBase.h>
21
22namespace android {
23namespace hardware {
24namespace details {
25
26/*
27 * Wrap the given interface with the smallest BsChild possible. Will return the
28 * argument directly if nullptr or isRemote().
29 */
30template<typename IType>
31sp<::android::hidl::base::V1_0::IBase> wrapPassthrough(
32        sp<IType> iface) {
33    if (iface.get() == nullptr || iface->isRemote()) {
34        // doesn't know how to handle it.
35        return iface;
36    }
37    std::string myDescriptor = getDescriptor(iface.get());
38    if (myDescriptor.empty()) {
39        // interfaceDescriptor fails
40        return nullptr;
41    }
42    auto func = gBsConstructorMap.get(myDescriptor, nullptr);
43    if (!func) {
44        return nullptr;
45    }
46    return func(static_cast<void *>(iface.get()));
47}
48
49}  // namespace details
50}  // namespace hardware
51}  // namespace android
52
53
54#endif  // ANDROID_HIDL_PASSTHROUGH_SUPPORT_H
55