79 lines
2.0 KiB
C++
79 lines
2.0 KiB
C++
/*
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DISKSPD
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Copyright(c) Microsoft Corporation
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All rights reserved.
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MIT License
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED *AS IS*, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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#include "OverlappedQueue.h"
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#include <assert.h>
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OverlappedQueue::OverlappedQueue(void) :
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_pHead(nullptr),
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_pTail(nullptr),
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_cItems(0)
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{
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}
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void OverlappedQueue::Add(OVERLAPPED *pOverlapped)
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{
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pOverlapped->Internal = NULL;
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if (_pHead == nullptr)
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{
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assert(_pTail == nullptr);
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_pHead = pOverlapped;
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}
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else
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{
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assert(_pTail != nullptr);
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_pTail->Internal = (ULONG_PTR)pOverlapped;
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}
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_pTail = pOverlapped;
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_cItems++;
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}
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bool OverlappedQueue::IsEmpty(void) const
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{
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return (_pHead == nullptr);
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}
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OVERLAPPED *OverlappedQueue::Remove(void)
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{
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assert(!IsEmpty());
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OVERLAPPED *pOverlapped = _pHead;
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_pHead = (OVERLAPPED *)pOverlapped->Internal;
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if (_pHead == nullptr)
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{
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_pTail = nullptr;
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}
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_cItems--;
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return pOverlapped;
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}
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size_t OverlappedQueue::GetCount() const
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{
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return _cItems;
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} |