/*
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* priority_buffer_queue.cpp - priority buffer queue
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*
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* Copyright (c) 2015 Intel Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Author: Wind Yuan <feng.yuan@intel.com>
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*/
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#include "priority_buffer_queue.h"
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#define XCAM_PRIORITY_BUFFER_FIXED_DELAY 8
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namespace XCam {
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bool
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PriorityBuffer::priority_greater_than (const PriorityBuffer& buf) const
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{
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int32_t result =
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((int32_t)(buf.seq_num - this->seq_num) * XCAM_PRIORITY_BUFFER_FIXED_DELAY +
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(int32_t)(buf.rank - this->rank));
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if (result == 0) {
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return (int32_t)(buf.seq_num - this->seq_num) > 0;
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}
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return result > 0;
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}
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bool
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PriorityBufferQueue::push_priority_buf (const SmartPtr<PriorityBuffer> &buf)
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{
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XCAM_ASSERT (buf.ptr ());
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SmartLock lock (_mutex);
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ObjList::iterator iter = _obj_list.begin ();
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for (; iter != _obj_list.end (); ++iter) {
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SmartPtr<PriorityBuffer> ¤t = *iter;
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XCAM_ASSERT (current.ptr ());
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if (buf->priority_greater_than (*current.ptr()))
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break;
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}
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_obj_list.insert (iter, buf);
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_new_obj_cond.signal ();
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return true;
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}
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};
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