upload android base code part6

android/system/core/logd/LogKlog.h

@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2014 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.
+ */
+
+#ifndef _LOGD_LOG_KLOG_H__
+#define _LOGD_LOG_KLOG_H__
+
+#include <private/android_logger.h>
+#include <sysutils/SocketListener.h>
+
+class LogBuffer;
+class LogReader;
+
+class LogKlog : public SocketListener {
+    LogBuffer* logbuf;
+    LogReader* reader;
+    const log_time signature;
+    // Set once thread is started, separates KLOG_ACTION_READ_ALL
+    // and KLOG_ACTION_READ phases.
+    bool initialized;
+    // Used during each of the above phases to control logging.
+    bool enableLogging;
+    // set if we are also running auditd, to filter out audit reports from
+    // our copy of the kernel log
+    bool auditd;
+
+    static log_time correction;
+
+   public:
+    LogKlog(LogBuffer* buf, LogReader* reader, int fdWrite, int fdRead,
+            bool auditd);
+    int log(const char* buf, ssize_t len);
+    void synchronize(const char* buf, ssize_t len);
+
+    bool isMonotonic() {
+        return logbuf->isMonotonic();
+    }
+    static void convertMonotonicToReal(log_time& real) {
+        real += correction;
+    }
+    static void convertRealToMonotonic(log_time& real) {
+        real -= correction;
+    }
+
+   protected:
+    void sniffTime(log_time& now, const char*& buf, ssize_t len, bool reverse);
+    pid_t sniffPid(const char*& buf, ssize_t len);
+    void calculateCorrection(const log_time& monotonic, const char* real_string,
+                             ssize_t len);
+    virtual bool onDataAvailable(SocketClient* cli);
+};
+
+#endif