1 files changed, 83 insertions, 0 deletions
diff --git a/libs/common_time/utils.h b/libs/common_time/utils.h
new file mode 100644
index 0000000..c28cf0a
--- /dev/null
+++ b/libs/common_time/utils.h
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2012 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 __UTILS_H__
+#define __UTILS_H__
+
+#include <stdint.h>
+#include <unistd.h>
+
+#include <utils/String8.h>
+#include <utils/threads.h>
+#include <utils/Timers.h>
+
+namespace android {
+
+class Timeout {
+  public:
+    Timeout() : mSystemEndTime(0) { }
+
+    // Set a timeout which should occur msec milliseconds from now.
+    // Negative values will cancel any current timeout;
+    void setTimeout(int msec);
+
+    // Return the number of milliseconds until the timeout occurs, or -1 if
+    // no timeout is scheduled.
+    int msecTillTimeout(nsecs_t nowTime);
+    int msecTillTimeout() { return msecTillTimeout(systemTime()); }
+
+  private:
+    // The systemTime() at which the timeout will be complete, or 0 if no
+    // timeout is currently scheduled.
+    nsecs_t mSystemEndTime;
+};
+
+class LogRing {
+  public:
+    LogRing(const char* header, size_t entries);
+    ~LogRing();
+
+    // Send a log message to logcat as well as storing it in the ring buffer.
+    void log(int prio, const char* tag, const char* fmt, ...);
+
+    // Add a log message the ring buffer, do not send the message to logcat.
+    void log(const char* fmt, ...);
+
+    // Dump the log to an fd (dumpsys style)
+    void dumpLog(int fd);
+
+  private:
+    class Entry {
+      public:
+        uint32_t count;
+        struct timeval first_ts;
+        struct timeval last_ts;
+        String8 s;
+    };
+
+    Mutex  mLock;
+    Entry* mRingBuffer;
+    size_t mSize;
+    size_t mWr;
+    bool   mIsFull;
+    const char* mHeader;
+
+    void internalLog(int prio, const char* tag, const char* fmt, va_list va);
+};
+
+}  // namespace android
+
+#endif  // __UTILS_H__