experiment : 封装 xxPagedLookasideList API
2013-05-31 19:19
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LookasideList 分为分页和非分页操作, 下面列出. API都不同, 用起来不方便, 不方便记忆, 看着眼晕~
分页API
ExInitializePagedLookasideList
ExAllocateFromPagedLookasideList
ExFreeToPagedLookasideList
ExDeletePagedLookasideList
非分页API
ExInitializeNPagedLookasideList
ExAllocateFromNPagedLookasideList
ExFreeToNPagedLookasideList
ExDeleteNPagedLookasideList
封装了4个API, 看着清爽.
测试输出
测试程序
API 封装的实现
分页API
ExInitializePagedLookasideList
ExAllocateFromPagedLookasideList
ExFreeToPagedLookasideList
ExDeletePagedLookasideList
非分页API
ExInitializeNPagedLookasideList
ExAllocateFromNPagedLookasideList
ExFreeToNPagedLookasideList
ExDeleteNPagedLookasideList
封装了4个API, 看着清爽.
/// @fn LookasideListInit
/// @brief 初始化LookAsideList
/// @param BOOLEAN bpage, TRUE = 分页内存, FALSE = 非分页内存
/// @param void ** ppLookAsideList, ppLookAsideList2级指针, 函数内部用到的
/// 时候强转类型
/// @param size_t nBufSize, 每次从LookAsideList中可以分配的内存大小
/// @return NTSTATUS, 调用方使用 NT_SUCCESS 宏来判断是否成功
NTSTATUS LookasideListInit(BOOLEAN bpage,
void ** ppLookAsideList,
size_t nBufSize);
/// @fn LookasideListAllocate
/// @param 从LookAsideList中分配一块内存
/// @param BOOLEAN bpage, TRUE = 分页内存, FALSE = 非分页内存
/// @param void ** ppLookAsideList, ppLookAsideList2级指针, 函数内部用到的
/// 时候强转类型
/// @param void ** ppNodeOut, 传出分配后的内存2级指针
/// @return NTSTATUS, 调用方使用 NT_SUCCESS 宏来判断是否成功
NTSTATUS LookasideListAllocate(BOOLEAN bpage,
void * pLookAsideList,
void ** ppNodeOut);
/// @fn LookasideListFree
/// @param 从LookAsideList中释放一块内存
/// @param BOOLEAN bpage, TRUE = 分页内存, FALSE = 非分页内存
/// @param void ** ppLookAsideList, ppLookAsideList2级指针, 函数内部用到的
/// 时候强转类型
/// @param void ** ppNodeOut, 曾经分配好的的内存2级指针
/// @return NTSTATUS, 调用方使用 NT_SUCCESS 宏来判断是否成功
NTSTATUS LookasideListFree(BOOLEAN bpage,
void * pLookAsideList,
void ** ppNodeOut);
/// @fn LookasideListDelete
/// @brief 释放LookasideList
/// @param BOOLEAN bpage, TRUE = 分页内存, FALSE = 非分页内存
/// @return NTSTATUS, 调用方使用 NT_SUCCESS 宏来判断是否成功
NTSTATUS LookasideListDelete(BOOLEAN bpage, void ** ppLookAsideList);测试输出
>> DriverEntry on DriverEntry, KeGetCurrentIrql() = 0 >> testLookasideListPage, KeGetCurrentIrql() = 0 testTag[0] testTag[1] testTag[2] << testLookasideListPage >> testLookasideListNPage, KeGetCurrentIrql() = 0 testTag[0] testTag[1] testTag[2] << testLookasideListNPage << DriverEntry
测试程序
/// the code on DriverEntry
testLookasideListPage();
testLookasideListNPage();void testLookasideListPage()
{
size_t nPos = 0;
PTEST testTag[NMAX];
PAGED_LOOKASIDE_LIST PageLookasideList;
PAGED_LOOKASIDE_LIST * pPageLookasideList = &PageLookasideList;
DbgPrint(">> testLookasideListPage, KeGetCurrentIrql() = %d\r\n",
KeGetCurrentIrql());
PAGED_CODE();
/// 初始化 LookasideList
LookasideListInit(TRUE, &pPageLookasideList, sizeof(TEST));
/// 从 exp_LookasideList 请求内存
for (nPos = 0; nPos < NMAX; nPos++)
{
testTag[nPos] = NULL;
if (!NT_SUCCESS(LookasideListAllocate(TRUE,
pPageLookasideList,
&testTag[nPos])))
{
DbgPrint("LookasideListAllocate(TRUE) error, nPos = %d\r\n", nPos);
}
}
/// use testTag do something ...
for (nPos = 0; nPos < NMAX; nPos++)
{
if (NULL != testTag[nPos])
{
RtlStringCchPrintfW(testTag[nPos]->cMsg,
sizeof(testTag[nPos]->cMsg) / sizeof(wchar_t),
L"testTag[%d]",
(ULONG)nPos);
DbgPrint("%ws\r\n", testTag[nPos]->cMsg);
}
}
/// 释放 exp_LookasideList 先前分配好的内存
for (nPos = 0; nPos < NMAX; nPos++)
{
if (!NT_SUCCESS(LookasideListFree(TRUE,
pPageLookasideList,
&testTag[nPos])))
{
DbgPrint("LookasideListFree(TRUE) error, nPos = %d\r\n", nPos);
}
testTag[nPos] = NULL;
}
/// 反初始化 LookasideList
LookasideListDelete(TRUE, &pPageLookasideList);
DbgPrint("<< testLookasideListPage\r\n");
}
VOID ThreadTestLookasideListPage(IN PVOID pContext)
{
}
void testLookasideListNPage()
{
size_t nPos = 0;
PTEST testTag[NMAX];
NPAGED_LOOKASIDE_LIST NPageLookasideList;
NPAGED_LOOKASIDE_LIST * pNPageLookasideList = &NPageLookasideList;
DbgPrint(">> testLookasideListNPage, KeGetCurrentIrql() = %d\r\n",
KeGetCurrentIrql());
/// 初始化 LookasideList
LookasideListInit(FALSE, &pNPageLookasideList, sizeof(TEST));
/// 从 exp_LookasideList 请求内存
for (nPos = 0; nPos < NMAX; nPos++)
{
testTag[nPos] = NULL;
if (!NT_SUCCESS(LookasideListAllocate(FALSE,
pNPageLookasideList,
&testTag[nPos])))
{
DbgPrint("LookasideListAllocate(TRUE) error, nPos = %d\r\n", nPos);
}
}
/// use testTag do something ...
for (nPos = 0; nPos < NMAX; nPos++)
{
if (NULL != testTag[nPos])
{
RtlStringCchPrintfW(testTag[nPos]->cMsg,
sizeof(testTag[nPos]->cMsg) / sizeof(wchar_t),
L"testTag[%d]",
(ULONG)nPos);
DbgPrint("%ws\r\n", testTag[nPos]->cMsg);
}
}
/// 释放 exp_LookasideList 先前分配好的内存
for (nPos = 0; nPos < NMAX; nPos++)
{
if (!NT_SUCCESS(LookasideListFree( FALSE,
pNPageLookasideList,
&testTag[nPos])))
{
DbgPrint("LookasideListFree(TRUE) error, nPos = %d\r\n", nPos);
}
testTag[nPos] = NULL;
}
/// 反初始化 LookasideList
LookasideListDelete(FALSE, &pNPageLookasideList);
DbgPrint("<< testLookasideListNPage\r\n");
}API 封装的实现
/// @file LookasideListOpt.h
/// @brief LookasideList 封装
#ifndef __LOOK_A_SIDE_LIST_OPT_H__
#define __LOOK_A_SIDE_LIST_OPT_H__
#include <ntddk.h>
#include <WINDEF.H>
/// operate LookasideList
#define LOOK_A_SIDE_LIST_POOL_TAG_NAME 'lasl' ///< 内存分配标记
/// @fn LookasideListInit /// @brief 初始化LookAsideList /// @param BOOLEAN bpage, TRUE = 分页内存, FALSE = 非分页内存 /// @param void ** ppLookAsideList, ppLookAsideList2级指针, 函数内部用到的 /// 时候强转类型 /// @param size_t nBufSize, 每次从LookAsideList中可以分配的内存大小 /// @return NTSTATUS, 调用方使用 NT_SUCCESS 宏来判断是否成功 NTSTATUS LookasideListInit(BOOLEAN bpage, void ** ppLookAsideList, size_t nBufSize); /// @fn LookasideListAllocate /// @param 从LookAsideList中分配一块内存 /// @param BOOLEAN bpage, TRUE = 分页内存, FALSE = 非分页内存 /// @param void ** ppLookAsideList, ppLookAsideList2级指针, 函数内部用到的 /// 时候强转类型 /// @param void ** ppNodeOut, 传出分配后的内存2级指针 /// @return NTSTATUS, 调用方使用 NT_SUCCESS 宏来判断是否成功 NTSTATUS LookasideListAllocate(BOOLEAN bpage, void * pLookAsideList, void ** ppNodeOut); /// @fn LookasideListFree /// @param 从LookAsideList中释放一块内存 /// @param BOOLEAN bpage, TRUE = 分页内存, FALSE = 非分页内存 /// @param void ** ppLookAsideList, ppLookAsideList2级指针, 函数内部用到的 /// 时候强转类型 /// @param void ** ppNodeOut, 曾经分配好的的内存2级指针 /// @return NTSTATUS, 调用方使用 NT_SUCCESS 宏来判断是否成功 NTSTATUS LookasideListFree(BOOLEAN bpage, void * pLookAsideList, void ** ppNodeOut); /// @fn LookasideListDelete /// @brief 释放LookasideList /// @param BOOLEAN bpage, TRUE = 分页内存, FALSE = 非分页内存 /// @return NTSTATUS, 调用方使用 NT_SUCCESS 宏来判断是否成功 NTSTATUS LookasideListDelete(BOOLEAN bpage, void ** ppLookAsideList);
/// 内部函数
NTSTATUS LookasideListInit_Page(void ** ppLookAsideList, size_t nBufSize);
NTSTATUS LookasideListInit_NPage(void ** ppLookAsideList, size_t nBufSize);
NTSTATUS LookasideListAllocate_Page(void * pLookAsideList, void ** ppNodeOut);
NTSTATUS LookasideListAllocate_NPage(void * pLookAsideList, void ** ppNodeOut);
NTSTATUS LookasideListFree_Page(void * pLookAsideList, void ** ppNodeOut);
NTSTATUS LookasideListFree_NPage(void * pLookAsideList, void ** ppNodeOut);
NTSTATUS LookasideListDelete_Page(void ** ppLookAsideList);
NTSTATUS LookasideListDelete_NPage(void ** ppLookAsideList);
#endif // #ifndef __LOOK_A_SIDE_LIST_OPT_H__
/// @file LookasideListOpt.c
/// @brief ...
#include "LookasideListOpt.h"
NTSTATUS LookasideListInit(BOOLEAN bpage,
void ** ppLookAsideList,
size_t nBufSize)
{
if (NULL == ppLookAsideList)
return STATUS_INVALID_PARAMETER;
if (bpage)
return LookasideListInit_Page(ppLookAsideList, nBufSize);
else
return LookasideListInit_NPage(ppLookAsideList, nBufSize);
}
NTSTATUS LookasideListAllocate(BOOLEAN bpage,
void * pLookAsideList,
void ** ppNodeOut)
{
if ((NULL == pLookAsideList) || (NULL == ppNodeOut))
return STATUS_INVALID_PARAMETER;
if (bpage)
return LookasideListAllocate_Page(pLookAsideList, ppNodeOut);
else
return LookasideListAllocate_NPage(pLookAsideList, ppNodeOut);
}
NTSTATUS LookasideListFree(BOOLEAN bpage,
void * pLookAsideList,
void ** ppNodeOut)
{
if ((NULL == pLookAsideList) || (NULL == ppNodeOut) || (NULL == *ppNodeOut))
return STATUS_INVALID_PARAMETER;
if (bpage)
return LookasideListFree_Page(pLookAsideList, ppNodeOut);
else
return LookasideListFree_NPage(pLookAsideList, ppNodeOut);
}
NTSTATUS LookasideListDelete(BOOLEAN bpage, void ** ppLookAsideList)
{
if ((NULL == ppLookAsideList) || (NULL == *ppLookAsideList))
return STATUS_INVALID_PARAMETER;
if (bpage)
return LookasideListDelete_Page(ppLookAsideList);
else
return LookasideListDelete_NPage(ppLookAsideList);
}
//////////////////////////////////////////////////////////////////////////
/// 内部函数
//////////////////////////////////////////////////////////////////////////
NTSTATUS LookasideListInit_Page(void ** ppLookAsideList, size_t nBufSize)
{
PPAGED_LOOKASIDE_LIST pLookaside = NULL;;
NT_ASSERT(NULL != ppLookAsideList);
NT_ASSERT(NULL != *ppLookAsideList);
PAGED_CODE();
pLookaside = *((PAGED_LOOKASIDE_LIST **)ppLookAsideList);
ExInitializePagedLookasideList(pLookaside,
NULL,
NULL,
0,
nBufSize,
LOOK_A_SIDE_LIST_POOL_TAG_NAME,
0 );
*ppLookAsideList = pLookaside;
return (NULL != pLookaside) ?
STATUS_SUCCESS : STATUS_INSUFFICIENT_RESOURCES;
}
NTSTATUS LookasideListInit_NPage(void ** ppLookAsideList, size_t nBufSize)
{
PNPAGED_LOOKASIDE_LIST pLookaside = NULL;
NT_ASSERT(NULL != ppLookAsideList);
NT_ASSERT(NULL != *ppLookAsideList);
pLookaside = *((NPAGED_LOOKASIDE_LIST **)ppLookAsideList);
ExInitializeNPagedLookasideList(pLookaside,
NULL,
NULL,
0,
nBufSize,
LOOK_A_SIDE_LIST_POOL_TAG_NAME,
0 );
*ppLookAsideList = pLookaside;
return (NULL != pLookaside) ?
STATUS_SUCCESS : STATUS_INSUFFICIENT_RESOURCES;
}
NTSTATUS LookasideListAllocate_Page(void * pLookAsideList, void ** ppNodeOut)
{
PAGED_CODE();
*ppNodeOut = ExAllocateFromPagedLookasideList(
(PPAGED_LOOKASIDE_LIST)pLookAsideList);
return (NULL != *ppNodeOut) ?
STATUS_SUCCESS : STATUS_INSUFFICIENT_RESOURCES;
}
NTSTATUS LookasideListAllocate_NPage(void * pLookAsideList, void ** ppNodeOut)
{
*ppNodeOut = ExAllocateFromNPagedLookasideList(
(PNPAGED_LOOKASIDE_LIST)pLookAsideList);
return (NULL != *ppNodeOut) ?
STATUS_SUCCESS : STATUS_INSUFFICIENT_RESOURCES;
}
NTSTATUS LookasideListFree_Page(void * pLookAsideList, void ** ppNodeOut)
{
PAGED_CODE();
ExFreeToPagedLookasideList((PPAGED_LOOKASIDE_LIST)pLookAsideList,
*ppNodeOut);
*ppNodeOut = NULL;
return STATUS_SUCCESS;
}
NTSTATUS LookasideListFree_NPage(void * pLookAsideList, void ** ppNodeOut)
{
ExFreeToNPagedLookasideList((PNPAGED_LOOKASIDE_LIST)pLookAsideList,
*ppNodeOut);
*ppNodeOut = NULL;
return STATUS_SUCCESS;
}
NTSTATUS LookasideListDelete_Page(void ** ppLookAsideList)
{
PPAGED_LOOKASIDE_LIST pLookAsideList = *ppLookAsideList;
PAGED_CODE();
ExDeletePagedLookasideList(pLookAsideList);
*ppLookAsideList = NULL;
return STATUS_SUCCESS;
}
NTSTATUS LookasideListDelete_NPage(void ** ppLookAsideList)
{
PNPAGED_LOOKASIDE_LIST pLookAsideList = *ppLookAsideList;
ExDeleteNPagedLookasideList(pLookAsideList);
*ppLookAsideList = NULL;
return STATUS_SUCCESS;
}
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