C++ (Cpp) open_map_context Exemples

Exemple #1

Fichier : CopyFile.cpp Projet : cosmicb0y/CopyFile

bool
file_copy_using_memory_map2(
	_In_ const wchar_t* src_file,
	_In_ const wchar_t* dst_file
	)
{
	_ASSERTE(NULL != src_file);
	_ASSERTE(NULL != dst_file);
	if (NULL == src_file || NULL == dst_file) return false;

	if (!is_file_existsW(src_file))
	{
		print("err ] no src file = %ws", src_file);
		return false;
	}

	if (is_file_existsW(dst_file))
	{
		DeleteFileW(dst_file);
	}

	// map src, dst file
	pmap_context src_ctx = open_map_context(src_file);
	pmap_context dst_ctx = create_map_context(dst_file, src_ctx->size);
	if (NULL == src_ctx || NULL == dst_ctx)
	{
		print("err ] open_map_context() failed.");
		close_map_context(src_ctx);
		close_map_context(dst_ctx);
		return false;
	}

	// copy src to dst by mmio
	uint32_t i = 0;
	uint32_t bs = 0;
	uint32_t rest = src_ctx->size;
	while (0 < rest)
	{
		if (rest > 4096)
		{
			bs = 4096;
			rest -= 4096;
		}
		else
		{
			bs = rest;
			rest = 0;
		}

		RtlCopyMemory(&dst_ctx->view[i], &src_ctx->view[i], bs);
		i += bs;
	}
	return true;
}

Exemple #2

Fichier : 150714 OS.cpp Projet : cshwan96/BOB4_OS2

/**
* @brief
* @param
* @see
* @remarks
* @code
* @endcode
* @return
**/
bool
file_copy_using_memory_map(
_In_ const wchar_t* src_file,
_In_ const wchar_t* dst_file
)
{
	_ASSERTE(NULL != src_file);
	_ASSERTE(NULL != dst_file);
	if (NULL == src_file || NULL == dst_file) return false;

	if (!is_file_existsW(src_file))
	{
		print("err ] no src file = %ws", src_file);
		return false;
	}

	if (is_file_existsW(dst_file))
	{
		DeleteFileW(dst_file);
	}

	// map src, dst file
	pmap_context src_ctx = open_map_context(src_file);
	pmap_context dst_ctx = create_map_context(dst_file, src_ctx->size);
	if (NULL == src_ctx || NULL == dst_ctx)
	{
		print("err ] open_map_context() failed.");
		close_map_context(src_ctx);
		close_map_context(dst_ctx);
		return false;
	}

	// copy src to dst by mmio
	for (uint32_t i = 0; i < src_ctx->size; ++i)
	{
		dst_ctx->view[i] = src_ctx->view[i];
	}

	close_map_context(src_ctx);
	close_map_context(dst_ctx);
	
	return true;
}

Exemple #3

Fichier : mmio.cpp Projet : orangee22/BoB4_Assignment

/**
* @brief
* @param
* @see
* @remarks
* @code
* @endcode
* @return
**/
bool
file_copy_using_memory_map(
_In_ const wchar_t* src_file,
_In_ const wchar_t* dst_file
)
{
	_ASSERTE(NULL != src_file);
	_ASSERTE(NULL != dst_file);
	if (NULL == src_file || NULL == dst_file) return false;

	if (!is_file_existsW(src_file))
	{
		print("err ] no src file = %ws", src_file);
		return false;
	}

	if (is_file_existsW(dst_file))
	{
		DeleteFileW(dst_file);
	}

	static DWORD AllocationGranularity = 0;
	if (0 == AllocationGranularity)
	{
		SYSTEM_INFO si = { 0 };
		GetSystemInfo(&si);
		AllocationGranularity = si.dwAllocationGranularity;
	}


	pmap_context src_ctx = open_map_context(src_file);
	pmap_context dest_ctx = user_create_map_context(dst_file, src_ctx->size);

	LARGE_INTEGER FileOffset = { 0 };
	LARGE_INTEGER FileSize = { dest_ctx->size };
	LARGE_INTEGER i = { 0 };
	LARGE_INTEGER BytesInBlock = { 0 };

	PUCHAR buffer = (PUCHAR)malloc((uint64_t)(1024 * 1024));
	while (FileSize.QuadPart > 0)
	{
		BytesInBlock.QuadPart = AllocationGranularity * 1;
		if (FileSize.QuadPart < AllocationGranularity * 1)
		{
			BytesInBlock.QuadPart = FileSize.QuadPart;
		}

		dest_ctx->view = (PCHAR)MapViewOfFile(
			dest_ctx->map,
			FILE_MAP_WRITE,
			(FileOffset.HighPart),
			(FileOffset.LowPart),
			BytesInBlock.QuadPart
			);
		if (dest_ctx->view == NULL)
		{
			print("err ] MapViewOfFile( %ws ) failed. gle = %u", dst_file, GetLastError());
			break;
		}
		
		RtlCopyMemory(buffer, &src_ctx->view[FileOffset.QuadPart], BytesInBlock.QuadPart);
		RtlCopyMemory(&dest_ctx->view[FileOffset.QuadPart], buffer, BytesInBlock.QuadPart);

		UnmapViewOfFile(dest_ctx->view);

		FileOffset.QuadPart += BytesInBlock.QuadPart;
		FileSize.QuadPart -= BytesInBlock.QuadPart;

	}

	CloseHandle(dest_ctx->map);
	CloseHandle(dest_ctx->handle);

	return true;
}