Oboe FIFO: general purpose FIFO
Bug: 33347409
Test: test_oboe_api
Change-Id: I764fe372f00b98364e4d36e7841cb00fc8af5695
Signed-off-by: Phil Burk <philburk@google.com>
diff --git a/media/liboboe/src/fifo/FifoController.h b/media/liboboe/src/fifo/FifoController.h
new file mode 100644
index 0000000..7434634
--- /dev/null
+++ b/media/liboboe/src/fifo/FifoController.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2015 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 FIFO_FIFO_CONTROLLER_H
+#define FIFO_FIFO_CONTROLLER_H
+
+#include <stdint.h>
+#include <atomic>
+
+#include "FifoControllerBase.h"
+
+/**
+ * A FIFO with counters contained in the class.
+ */
+class FifoController : public FifoControllerBase
+{
+public:
+ FifoController(fifo_counter_t bufferSize, fifo_counter_t threshold)
+ : FifoControllerBase(bufferSize, threshold)
+ , mReadCounter(0)
+ , mWriteCounter(0)
+ {}
+
+ virtual ~FifoController() {}
+
+ // TODO review use of memory barriers, probably incorrect
+ virtual fifo_counter_t getReadCounter() override {
+ return mReadCounter.load(std::memory_order_acquire);
+ }
+ virtual void setReadCounter(fifo_counter_t n) override {
+ mReadCounter.store(n, std::memory_order_release);
+ }
+ virtual fifo_counter_t getWriteCounter() override {
+ return mWriteCounter.load(std::memory_order_acquire);
+ }
+ virtual void setWriteCounter(fifo_counter_t n) override {
+ mWriteCounter.store(n, std::memory_order_release);
+ }
+
+private:
+ std::atomic<fifo_counter_t> mReadCounter;
+ std::atomic<fifo_counter_t> mWriteCounter;
+};
+
+
+#endif //FIFO_FIFO_CONTROLLER_H