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/*
* Copyright 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.
*/
#include <stdio.h>
#include <stdlib.h>
#include <cutils/log.h>
#include <utils/String8.h>
#include "EventLog.h"
// ---------------------------------------------------------------------------
namespace android {
// ---------------------------------------------------------------------------
ANDROID_SINGLETON_STATIC_INSTANCE(EventLog)
EventLog::EventLog() {
}
void EventLog::doLogFrameDurations(const String8& window,
const int32_t* durations, size_t numDurations) {
EventLog::TagBuffer buffer(LOGTAG_SF_FRAME_DUR);
buffer.startList(1 + numDurations);
buffer.writeString8(window);
for (size_t i = 0; i < numDurations; i++) {
buffer.writeInt32(durations[i]);
}
buffer.endList();
buffer.log();
}
void EventLog::logFrameDurations(const String8& window,
const int32_t* durations, size_t numDurations) {
EventLog::getInstance().doLogFrameDurations(window, durations,
numDurations);
}
// ---------------------------------------------------------------------------
EventLog::TagBuffer::TagBuffer(int32_t tag)
: mPos(0), mTag(tag), mOverflow(false) {
}
void EventLog::TagBuffer::log() {
if (mOverflow) {
ALOGW("couldn't log to binary event log: overflow.");
} else if (android_bWriteLog(mTag, mStorage, mPos) < 0) {
ALOGE("couldn't log to EventLog: %s", strerror(errno));
}
// purge the buffer
mPos = 0;
mOverflow = false;
}
void EventLog::TagBuffer::startList(int8_t count) {
if (mOverflow) return;
const size_t needed = 1 + sizeof(count);
if (mPos + needed > STORAGE_MAX_SIZE) {
mOverflow = true;
return;
}
mStorage[mPos + 0] = EVENT_TYPE_LIST;
mStorage[mPos + 1] = count;
mPos += needed;
}
void EventLog::TagBuffer::endList() {
if (mOverflow) return;
const size_t needed = 1;
if (mPos + needed > STORAGE_MAX_SIZE) {
mOverflow = true;
return;
}
mStorage[mPos + 0] = '\n';
mPos += needed;
}
void EventLog::TagBuffer::writeInt32(int32_t value) {
if (mOverflow) return;
const size_t needed = 1 + sizeof(value);
if (mPos + needed > STORAGE_MAX_SIZE) {
mOverflow = true;
return;
}
mStorage[mPos + 0] = EVENT_TYPE_INT;
memcpy(&mStorage[mPos + 1], &value, sizeof(value));
mPos += needed;
}
void EventLog::TagBuffer::writeInt64(int64_t value) {
if (mOverflow) return;
const size_t needed = 1 + sizeof(value);
if (mPos + needed > STORAGE_MAX_SIZE) {
mOverflow = true;
return;
}
mStorage[mPos + 0] = EVENT_TYPE_LONG;
memcpy(&mStorage[mPos + 1], &value, sizeof(value));
mPos += needed;
}
void EventLog::TagBuffer::writeString8(const String8& value) {
if (mOverflow) return;
const int32_t stringLen = value.length();
const size_t needed = 1 + sizeof(int32_t) + stringLen;
if (mPos + needed > STORAGE_MAX_SIZE) {
mOverflow = true;
return;
}
mStorage[mPos + 0] = EVENT_TYPE_STRING;
memcpy(&mStorage[mPos + 1], &stringLen, sizeof(int32_t));
memcpy(&mStorage[mPos + 5], value.string(), stringLen);
mPos += needed;
}
// ---------------------------------------------------------------------------
}// namespace android
// ---------------------------------------------------------------------------
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