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      1 /*
      2  * Copyright 2014 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_NATIVE_HANDLE_H
     18 #define ANDROID_NATIVE_HANDLE_H
     19 
     20 #include <utils/RefBase.h>
     21 #include <utils/StrongPointer.h>
     22 
     23 typedef struct native_handle native_handle_t;
     24 
     25 namespace android {
     26 
     27 class NativeHandle : public LightRefBase<NativeHandle> {
     28 public:
     29     // Create a refcounted wrapper around a native_handle_t, and declare
     30     // whether the wrapper owns the handle (so that it should clean up the
     31     // handle upon destruction) or not.
     32     // If handle is NULL, no NativeHandle will be created.
     33     static sp<NativeHandle> create(native_handle_t* handle, bool ownsHandle);
     34 
     35     const native_handle_t* handle() const {
     36         return mHandle;
     37     }
     38 
     39 private:
     40     // for access to the destructor
     41     friend class LightRefBase<NativeHandle>;
     42 
     43     NativeHandle(native_handle_t* handle, bool ownsHandle);
     44     ~NativeHandle();
     45 
     46     native_handle_t* mHandle;
     47     bool mOwnsHandle;
     48 
     49     // non-copyable
     50     NativeHandle(const NativeHandle&);
     51     NativeHandle& operator=(const NativeHandle&);
     52 };
     53 
     54 } // namespace android
     55 
     56 #endif // ANDROID_NATIVE_HANDLE_H
     57