71 lines
2.1 KiB
C++
71 lines
2.1 KiB
C++
/*
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* Copyright (C) 2005 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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//
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// C/C++ logging functions. See the logging documentation for API details.
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//
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// We'd like these to be available from C code (in case we import some from
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// somewhere), so this has a C interface.
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//
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// The output will be correct when the log file is shared between multiple
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// threads and/or multiple processes so long as the operating system
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// supports O_APPEND. These calls have mutex-protected data structures
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// and so are NOT reentrant. Do not use LOG in a signal handler.
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//
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#ifndef _LIBS_UTILS_LOG_H
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#define _LIBS_UTILS_LOG_H
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#include <cutils/log.h>
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#include <sys/types.h>
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#ifdef __cplusplus
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namespace android {
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/*
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* A very simple utility that yells in the log when an operation takes too long.
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*/
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class LogIfSlow {
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public:
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LogIfSlow(const char* tag, android_LogPriority priority,
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int timeoutMillis, const char* message);
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~LogIfSlow();
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private:
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const char* const mTag;
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const android_LogPriority mPriority;
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const int mTimeoutMillis;
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const char* const mMessage;
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const int64_t mStart;
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};
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/*
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* Writes the specified debug log message if this block takes longer than the
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* specified number of milliseconds to run. Includes the time actually taken.
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*
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* {
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* ALOGD_IF_SLOW(50, "Excessive delay doing something.");
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* doSomething();
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* }
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*/
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#define ALOGD_IF_SLOW(timeoutMillis, message) \
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android::LogIfSlow _logIfSlow(LOG_TAG, ANDROID_LOG_DEBUG, timeoutMillis, message);
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} // namespace android
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#endif // __cplusplus
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#endif // _LIBS_UTILS_LOG_H
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