Add code for generating fifo command packing.

Change-Id: I2d2ef095344b200b10457de96ae1d85821edc91e

1 files changed, 49 insertions, 0 deletions

diff --git a/rsFifo.h b/rsFifo.h
new file mode 100644
index 00000000..f924b958
--- /dev/null
+++ b/rsFifo.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2011 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 ANDROID_RS_FIFO_H
+#define ANDROID_RS_FIFO_H
+
+
+#include "rsUtils.h"
+
+namespace android {
+namespace renderscript {
+
+
+// A simple FIFO to be used as a producer / consumer between two
+// threads.  One is writer and one is reader.  The common cases
+// will not require locking.  It is not threadsafe for multiple
+// readers or writers by design.
+
+class Fifo {
+protected:
+    Fifo();
+    virtual ~Fifo();
+
+public:
+    void virtual writeAsync(const void *data, size_t bytes) = 0;
+    void virtual writeWaitReturn(void *ret, size_t retSize) = 0;
+    size_t virtual read(void *data, size_t bytes) = 0;
+    void virtual readReturn(const void *data, size_t bytes) = 0;
+
+    void virtual flush() = 0;
+
+};
+
+}
+}
+#endif