Add media.log service based on NBLog
Change-Id: Ie45093df6ac9a739d05c8d408fab52a9a8a27e7f
diff --git a/services/medialog/MediaLogService.cpp b/services/medialog/MediaLogService.cpp
new file mode 100644
index 0000000..2332b3e
--- /dev/null
+++ b/services/medialog/MediaLogService.cpp
@@ -0,0 +1,81 @@
+/*
+ * 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.
+ */
+
+#define LOG_TAG "MediaLog"
+//#define LOG_NDEBUG 0
+
+#include <sys/mman.h>
+#include <utils/Log.h>
+#include <media/nbaio/NBLog.h>
+#include <private/android_filesystem_config.h>
+#include "MediaLogService.h"
+
+namespace android {
+
+void MediaLogService::registerWriter(const sp<IMemory>& shared, size_t size, const char *name)
+{
+ if (IPCThreadState::self()->getCallingUid() != AID_MEDIA || shared == 0 ||
+ size < kMinSize || size > kMaxSize || name == NULL ||
+ shared->size() < NBLog::Timeline::sharedSize(size)) {
+ return;
+ }
+ sp<NBLog::Reader> reader(new NBLog::Reader(size, shared));
+ NamedReader namedReader(reader, name);
+ Mutex::Autolock _l(mLock);
+ mNamedReaders.add(namedReader);
+}
+
+void MediaLogService::unregisterWriter(const sp<IMemory>& shared)
+{
+ if (IPCThreadState::self()->getCallingUid() != AID_MEDIA || shared == 0) {
+ return;
+ }
+ Mutex::Autolock _l(mLock);
+ for (size_t i = 0; i < mNamedReaders.size(); ) {
+ if (mNamedReaders[i].reader()->isIMemory(shared)) {
+ mNamedReaders.removeAt(i);
+ } else {
+ i++;
+ }
+ }
+}
+
+status_t MediaLogService::dump(int fd, const Vector<String16>& args)
+{
+ Vector<NamedReader> namedReaders;
+ {
+ Mutex::Autolock _l(mLock);
+ namedReaders = mNamedReaders;
+ }
+ for (size_t i = 0; i < namedReaders.size(); i++) {
+ const NamedReader& namedReader = namedReaders[i];
+ if (fd >= 0) {
+ fdprintf(fd, "\n%s:\n", namedReader.name());
+ } else {
+ ALOGI("%s:", namedReader.name());
+ }
+ namedReader.reader()->dump(fd, 0 /*indent*/);
+ }
+ return NO_ERROR;
+}
+
+status_t MediaLogService::onTransact(uint32_t code, const Parcel& data, Parcel* reply,
+ uint32_t flags)
+{
+ return BnMediaLogService::onTransact(code, data, reply, flags);
+}
+
+} // namespace android