[osal]: add queue data type

Only the src port supports blocking operation. Please
notice the sink port is neither block nor atomic.

Change-Id: Ib710eaca9fe1b5d5aada8e56481102589b52fc52
Signed-off-by: Randy Li <randy.li@rock-chips.com>

osal/mpp_queue.cpp

@@ -0,0 +1,61 @@
+/*
+ * Copyright 2017 Rockchip Electronics Co. LTD
+ *
+ * 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.
+ */
+
+#include "mpp_err.h"
+#include "mpp_queue.h"
+
+MppQueue::MppQueue(node_destructor func)
+    : mpp_list(func), mFlushFlag(0)
+{
+    sem_init(&mQueuePending, 0, 0);
+}
+
+MppQueue::~MppQueue()
+{
+    sem_destroy (&mQueuePending);
+}
+
+RK_S32 MppQueue::push(void *data, RK_S32 size)
+{
+    RK_S32 ret = 0;
+
+    ret = mpp_list::add_at_tail(data, size);
+    mFlushFlag = 0;
+    sem_post(&mQueuePending);
+
+    return ret;
+}
+
+RK_S32 MppQueue::pull(void *data, RK_S32 size)
+{
+    if (!mFlushFlag)
+        sem_wait(&mQueuePending);
+    {
+        AutoMutex autoLock(mpp_list::mutex());
+        if (!mpp_list::list_size())
+            return MPP_NOK;
+
+        return mpp_list::del_at_head(data, size);
+    }
+    return MPP_ERR_INIT;
+}
+
+RK_S32 MppQueue::flush()
+{
+    mFlushFlag = 1;
+    sem_post(&mQueuePending);
+    return mpp_list::flush();
+}