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/*
* Copyright (C) 2013 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_SERVERS_CAMERA_TRACES_H_
#define ANDROID_SERVERS_CAMERA_TRACES_H_
#include <utils/Errors.h>
#include <utils/String16.h>
#include <utils/Vector.h>
namespace android {
namespace camera3 {
class CameraTracesImpl;
// Collect a list of the process's stack traces
class CameraTraces {
public:
/**
* Save the current stack trace for each thread in the process. At most
* MAX_TRACES will be saved, after which the oldest traces will be discarded.
*
* <p>Use CameraTraces::dump to print out the traces.</p>
*/
static void saveTrace();
/**
* Prints all saved traces to the specified file descriptor.
*
* <p>Each line is indented by DUMP_INDENT spaces.</p>
*/
static status_t dump(int fd, const Vector<String16>& args);
private:
enum {
// Don't collect more than 100 traces. Discard oldest.
MAX_TRACES = 100,
// Insert 2 spaces when dumping the traces
DUMP_INDENT = 2,
};
CameraTraces();
~CameraTraces();
CameraTraces(CameraTraces& rhs);
static CameraTracesImpl& sImpl;
}; // class CameraTraces
}; // namespace camera3
}; // namespace android
#endif // ANDROID_SERVERS_CAMERA_TRACES_H_
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