1 files changed, 99 insertions, 0 deletions
diff --git a/nci/jni/IntervalTimer.cpp b/nci/jni/IntervalTimer.cpp
new file mode 100644
index 0000000..f71ca8e
--- /dev/null
+++ b/nci/jni/IntervalTimer.cpp
@@ -0,0 +1,99 @@
+/*
+ * 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.
+ */
+
+/*
+ *  Asynchronous interval timer.
+ */
+
+#include "IntervalTimer.h"
+#include "OverrideLog.h"
+
+
+IntervalTimer::IntervalTimer()
+{
+    mTimerId = NULL;
+    mCb = NULL;
+}
+
+
+bool IntervalTimer::set(int ms, TIMER_FUNC cb)
+{
+    if (mTimerId == NULL)
+    {
+        if (cb == NULL)
+            return false;
+
+        if (!create(cb))
+            return false;
+    }
+    if (cb != mCb)
+    {
+        kill();
+        if (!create(cb))
+            return false;
+    }
+
+    int stat = 0;
+    struct itimerspec ts;
+    ts.it_value.tv_sec = ms / 1000;
+    ts.it_value.tv_nsec = (ms % 1000) * 1000000;
+
+    ts.it_interval.tv_sec = 0;
+    ts.it_interval.tv_nsec = 0;
+
+    stat = timer_settime(mTimerId, 0, &ts, 0);
+    if (stat == -1)
+        ALOGE("IntervalTimer::set: fail set timer");
+    return stat == 0;
+}
+
+
+IntervalTimer::~IntervalTimer()
+{
+    kill();
+}
+
+
+void IntervalTimer::kill()
+{
+    if (mTimerId == NULL)
+        return;
+
+    timer_delete(mTimerId);
+    mTimerId = NULL;
+    mCb = NULL;
+}
+
+
+bool IntervalTimer::create(TIMER_FUNC cb)
+{
+    struct sigevent se;
+    int stat = 0;
+
+    /*
+     * Set the sigevent structure to cause the signal to be
+     * delivered by creating a new thread.
+     */
+    se.sigev_notify = SIGEV_THREAD;
+    se.sigev_value.sival_ptr = &mTimerId;
+    se.sigev_notify_function = cb;
+    se.sigev_notify_attributes = NULL;
+    mCb = cb;
+    stat = timer_create(CLOCK_MONOTONIC, &se, &mTimerId);
+    if (stat == -1)
+        ALOGE("IntervalTimer::create: fail create timer");
+    return stat == 0;
+}