mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-07 04:05:49 +00:00
63 lines
1.9 KiB
C++
63 lines
1.9 KiB
C++
/*
|
|
* Copyright (C) 2010 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#ifndef ANDROID_UTILS_FLATTENABLE_H
|
|
#define ANDROID_UTILS_FLATTENABLE_H
|
|
|
|
|
|
#include <stdint.h>
|
|
#include <sys/types.h>
|
|
#include <utils/Errors.h>
|
|
|
|
namespace android {
|
|
|
|
class Flattenable
|
|
{
|
|
public:
|
|
// size in bytes of the flattened object
|
|
virtual size_t getFlattenedSize() const = 0;
|
|
|
|
// number of file descriptors to flatten
|
|
virtual size_t getFdCount() const = 0;
|
|
|
|
// flattens the object into buffer.
|
|
// size should be at least of getFlattenedSize()
|
|
// file descriptors are written in the fds[] array but ownership is
|
|
// not transfered (ie: they must be dupped by the caller of
|
|
// flatten() if needed).
|
|
virtual status_t flatten(void* buffer, size_t size,
|
|
int fds[], size_t count) const = 0;
|
|
|
|
// unflattens the object from buffer.
|
|
// size should be equal to the value of getFlattenedSize() when the
|
|
// object was flattened.
|
|
// unflattened file descriptors are found in the fds[] array and
|
|
// don't need to be dupped(). ie: the caller of unflatten doesn't
|
|
// keep ownership. If a fd is not retained by unflatten() it must be
|
|
// explicitly closed.
|
|
virtual status_t unflatten(void const* buffer, size_t size,
|
|
int fds[], size_t count) = 0;
|
|
|
|
protected:
|
|
virtual ~Flattenable() = 0;
|
|
|
|
};
|
|
|
|
}; // namespace android
|
|
|
|
|
|
#endif /* ANDROID_UTILS_FLATTENABLE_H */
|