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/*
* Copyright (C) 2005 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.
*/
//
// C/C++ logging functions. See the logging documentation for API details.
//
// We'd like these to be available from C code (in case we import some from
// somewhere), so this has a C interface.
//
// The output will be correct when the log file is shared between multiple
// threads and/or multiple processes so long as the operating system
// supports O_APPEND. These calls have mutex-protected data structures
// and so are NOT reentrant. Do not use LOG in a signal handler.
//
#ifndef _LIBS_UTILS_LOG_H
#define _LIBS_UTILS_LOG_H
#include <sys/types.h>
#include <log/log.h>
#ifdef __cplusplus
namespace android {
/*
* A very simple utility that yells in the log when an operation takes too long.
*/
class LogIfSlow {
public:
LogIfSlow(const char* tag, android_LogPriority priority,
int timeoutMillis, const char* message);
~LogIfSlow();
private:
const char* const mTag;
const android_LogPriority mPriority;
const int mTimeoutMillis;
const char* const mMessage;
const int64_t mStart;
};
/*
* Writes the specified debug log message if this block takes longer than the
* specified number of milliseconds to run. Includes the time actually taken.
*
* {
* ALOGD_IF_SLOW(50, "Excessive delay doing something.");
* doSomething();
* }
*/
#define ALOGD_IF_SLOW(timeoutMillis, message) \
android::LogIfSlow _logIfSlow(LOG_TAG, ANDROID_LOG_DEBUG, timeoutMillis, message);
} // namespace android
#endif // __cplusplus
#endif // _LIBS_UTILS_LOG_H
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