1 files changed, 73 insertions, 0 deletions
diff --git a/logd/SerializedLogBuffer.h b/logd/SerializedLogBuffer.h
new file mode 100644
index 0000000000..294cfe6f1d
--- /dev/null
+++ b/logd/SerializedLogBuffer.h
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2020 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.
+ */
+
+#pragma once
+
+#include <atomic>
+#include <bitset>
+#include <list>
+#include <mutex>
+#include <queue>
+#include <thread>
+#include <vector>
+
+#include <android-base/thread_annotations.h>
+
+#include "LogBuffer.h"
+#include "LogReaderList.h"
+#include "LogStatistics.h"
+#include "LogTags.h"
+#include "SerializedLogChunk.h"
+#include "SerializedLogEntry.h"
+#include "rwlock.h"
+
+class SerializedLogBuffer final : public LogBuffer {
+  public:
+    SerializedLogBuffer(LogReaderList* reader_list, LogTags* tags, LogStatistics* stats);
+    void Init() override;
+
+    int Log(log_id_t log_id, log_time realtime, uid_t uid, pid_t pid, pid_t tid, const char* msg,
+            uint16_t len) override;
+    std::unique_ptr<FlushToState> CreateFlushToState(uint64_t start, LogMask log_mask) override;
+    bool FlushTo(LogWriter* writer, FlushToState& state,
+                 const std::function<FilterResult(log_id_t log_id, pid_t pid, uint64_t sequence,
+                                                  log_time realtime)>& filter) override;
+
+    bool Clear(log_id_t id, uid_t uid) override;
+    size_t GetSize(log_id_t id) override;
+    bool SetSize(log_id_t id, size_t size) override;
+
+    uint64_t sequence() const override { return sequence_.load(std::memory_order_relaxed); }
+
+  private:
+    bool ShouldLog(log_id_t log_id, const char* msg, uint16_t len);
+    void MaybePrune(log_id_t log_id) REQUIRES(lock_);
+    void Prune(log_id_t log_id, size_t bytes_to_free, uid_t uid) REQUIRES(lock_);
+    void NotifyReadersOfPrune(log_id_t log_id, const std::list<SerializedLogChunk>::iterator& chunk)
+            REQUIRES(reader_list_->reader_threads_lock());
+    void RemoveChunkFromStats(log_id_t log_id, SerializedLogChunk& chunk);
+    size_t GetSizeUsed(log_id_t id) REQUIRES(lock_);
+
+    LogReaderList* reader_list_;
+    LogTags* tags_;
+    LogStatistics* stats_;
+
+    size_t max_size_[LOG_ID_MAX] GUARDED_BY(lock_) = {};
+    std::list<SerializedLogChunk> logs_[LOG_ID_MAX] GUARDED_BY(lock_);
+    RwLock lock_;
+
+    std::atomic<uint64_t> sequence_ = 1;
+};