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 
22 namespace android {
23 namespace hardware {
24 namespace details {
25 
26 /*
27  * Wrap the given interface with the smallest BsChild possible. Will return the
28  * argument directly if nullptr or isRemote().
29  */
30 template<typename IType>
wrapPassthrough(sp<IType> iface)31 sp<::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