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// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
#include "precomp.h"
// Exit macros
#define QueExitOnLastError(x, s, ...) ExitOnLastErrorSource(DUTIL_SOURCE_QUEUTIL, x, s, __VA_ARGS__)
#define QueExitOnLastErrorDebugTrace(x, s, ...) ExitOnLastErrorDebugTraceSource(DUTIL_SOURCE_QUEUTIL, x, s, __VA_ARGS__)
#define QueExitWithLastError(x, s, ...) ExitWithLastErrorSource(DUTIL_SOURCE_QUEUTIL, x, s, __VA_ARGS__)
#define QueExitOnFailure(x, s, ...) ExitOnFailureSource(DUTIL_SOURCE_QUEUTIL, x, s, __VA_ARGS__)
#define QueExitOnRootFailure(x, s, ...) ExitOnRootFailureSource(DUTIL_SOURCE_QUEUTIL, x, s, __VA_ARGS__)
#define QueExitOnFailureDebugTrace(x, s, ...) ExitOnFailureDebugTraceSource(DUTIL_SOURCE_QUEUTIL, x, s, __VA_ARGS__)
#define QueExitOnNull(p, x, e, s, ...) ExitOnNullSource(DUTIL_SOURCE_QUEUTIL, p, x, e, s, __VA_ARGS__)
#define QueExitOnNullWithLastError(p, x, s, ...) ExitOnNullWithLastErrorSource(DUTIL_SOURCE_QUEUTIL, p, x, s, __VA_ARGS__)
#define QueExitOnNullDebugTrace(p, x, e, s, ...) ExitOnNullDebugTraceSource(DUTIL_SOURCE_QUEUTIL, p, x, e, s, __VA_ARGS__)
#define QueExitOnInvalidHandleWithLastError(p, x, s, ...) ExitOnInvalidHandleWithLastErrorSource(DUTIL_SOURCE_QUEUTIL, p, x, s, __VA_ARGS__)
#define QueExitOnWin32Error(e, x, s, ...) ExitOnWin32ErrorSource(DUTIL_SOURCE_QUEUTIL, e, x, s, __VA_ARGS__)
#define QueExitOnGdipFailure(g, x, s, ...) ExitOnGdipFailureSource(DUTIL_SOURCE_QUEUTIL, g, x, s, __VA_ARGS__)
struct QUEUTIL_QUEUE_ITEM
{
QUEUTIL_QUEUE_ITEM* pNext;
void* pvValue;
};
struct QUEUTIL_QUEUE_STRUCT
{
QUEUTIL_QUEUE_ITEM* pFirst;
QUEUTIL_QUEUE_ITEM* pLast;
};
const int QUEUTIL_QUEUE_HANDLE_BYTES = sizeof(QUEUTIL_QUEUE_STRUCT);
extern "C" HRESULT DAPI QueCreate(
__out_bcount(QUEUTIL_QUEUE_HANDLE_BYTES) QUEUTIL_QUEUE_HANDLE* phQueue
)
{
HRESULT hr = S_OK;
QueExitOnNull(phQueue, hr, E_INVALIDARG, "Handle not specified while creating queue.");
*phQueue = reinterpret_cast<QUEUTIL_QUEUE_HANDLE>(MemAlloc(QUEUTIL_QUEUE_HANDLE_BYTES, TRUE));
QueExitOnNull(*phQueue, hr, E_OUTOFMEMORY, "Failed to allocate queue object.");
LExit:
return hr;
}
extern "C" HRESULT DAPI QueEnqueue(
__in_bcount(QUEUTIL_QUEUE_HANDLE_BYTES) QUEUTIL_QUEUE_HANDLE hQueue,
__in void* pvValue
)
{
HRESULT hr = S_OK;
QUEUTIL_QUEUE_ITEM* pItem = NULL;
QUEUTIL_QUEUE_STRUCT* pQueue = reinterpret_cast<QUEUTIL_QUEUE_STRUCT*>(hQueue);
QueExitOnNull(pQueue, hr, E_INVALIDARG, "Handle not specified while enqueing value.");
pItem = reinterpret_cast<QUEUTIL_QUEUE_ITEM*>(MemAlloc(sizeof(QUEUTIL_QUEUE_ITEM), TRUE));
QueExitOnNull(pItem, hr, E_OUTOFMEMORY, "Failed to allocate queue item.");
pItem->pvValue = pvValue;
if (!pQueue->pLast)
{
pQueue->pFirst = pItem;
}
else
{
pQueue->pLast->pNext = pItem;
}
pQueue->pLast = pItem;
pItem = NULL;
LExit:
ReleaseMem(pItem);
return hr;
}
extern "C" HRESULT DAPI QueDequeue(
__in_bcount(QUEUTIL_QUEUE_HANDLE_BYTES) QUEUTIL_QUEUE_HANDLE hQueue,
__out void** ppvValue
)
{
HRESULT hr = S_OK;
QUEUTIL_QUEUE_ITEM* pItem = NULL;
QUEUTIL_QUEUE_STRUCT* pQueue = reinterpret_cast<QUEUTIL_QUEUE_STRUCT*>(hQueue);
QueExitOnNull(pQueue, hr, E_INVALIDARG, "Handle not specified while dequeing value.");
if (!pQueue->pFirst)
{
*ppvValue = NULL;
ExitFunction1(hr = E_NOMOREITEMS);
}
pItem = pQueue->pFirst;
if (!pItem->pNext)
{
pQueue->pFirst = NULL;
pQueue->pLast = NULL;
}
else
{
pQueue->pFirst = pItem->pNext;
}
*ppvValue = pItem->pvValue;
LExit:
ReleaseMem(pItem);
return hr;
}
extern "C" void DAPI QueDestroy(
__in_bcount(QUEUTIL_QUEUE_HANDLE_BYTES) QUEUTIL_QUEUE_HANDLE hQueue,
__in_opt PFNQUEUTIL_QUEUE_RELEASE_VALUE pfnReleaseValue,
__in_opt void* pvContext
)
{
HRESULT hr = S_OK;
void* pvValue = NULL;
hr = hQueue ? QueDequeue(hQueue, &pvValue) : E_NOMOREITEMS;
while (SUCCEEDED(hr))
{
if (pfnReleaseValue)
{
pfnReleaseValue(pvValue, pvContext);
}
hr = QueDequeue(hQueue, &pvValue);
}
ReleaseMem(hQueue);
}
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