+++ /dev/null
-/*
- * PROJECT: ReactOS Win32 Base API
- * LICENSE: GPL - See COPYING in the top level directory
- * FILE: dll/win32/kernel32/client/file/filemap.c
- * PURPOSE: Handles virtual memory APIs
- * PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
- */
-
-/* INCLUDES *******************************************************************/
-
-#include <k32.h>
-
-#define NDEBUG
-#include <debug.h>
-
-/* FUNCTIONS ******************************************************************/
-
-/*
- * @implemented
- */
-HANDLE
-NTAPI
-CreateFileMappingA(IN HANDLE hFile,
- IN LPSECURITY_ATTRIBUTES lpFileMappingAttributes,
- IN DWORD flProtect,
- IN DWORD dwMaximumSizeHigh,
- IN DWORD dwMaximumSizeLow,
- IN LPCSTR lpName)
-{
- /* Call the W(ide) function */
- ConvertWin32AnsiObjectApiToUnicodeApi(FileMapping,
- lpName,
- hFile,
- lpFileMappingAttributes,
- flProtect,
- dwMaximumSizeHigh,
- dwMaximumSizeLow);
-}
-
-/*
- * @implemented
- */
-HANDLE
-NTAPI
-CreateFileMappingW(HANDLE hFile,
- LPSECURITY_ATTRIBUTES lpFileMappingAttributes,
- DWORD flProtect,
- DWORD dwMaximumSizeHigh,
- DWORD dwMaximumSizeLow,
- LPCWSTR lpName)
-{
- NTSTATUS Status;
- HANDLE SectionHandle;
- OBJECT_ATTRIBUTES LocalAttributes;
- POBJECT_ATTRIBUTES ObjectAttributes;
- UNICODE_STRING SectionName;
- ACCESS_MASK DesiredAccess;
- LARGE_INTEGER LocalSize;
- PLARGE_INTEGER SectionSize = NULL;
- ULONG Attributes;
-
- /* Set default access */
- DesiredAccess = STANDARD_RIGHTS_REQUIRED | SECTION_QUERY | SECTION_MAP_READ;
-
- /* Get the attributes for the actual allocation and cleanup flProtect */
- Attributes = flProtect & (SEC_FILE | SEC_IMAGE | SEC_RESERVE | SEC_NOCACHE | SEC_COMMIT | SEC_LARGE_PAGES);
- flProtect ^= Attributes;
-
- /* If the caller didn't say anything, assume SEC_COMMIT */
- if (!Attributes) Attributes = SEC_COMMIT;
-
- /* Now check if the caller wanted write access */
- if (flProtect == PAGE_READWRITE)
- {
- /* Give it */
- DesiredAccess |= SECTION_MAP_WRITE;
- }
- else if (flProtect == PAGE_EXECUTE_READWRITE)
- {
- /* Give it */
- DesiredAccess |= (SECTION_MAP_WRITE | SECTION_MAP_EXECUTE);
- }
- else if (flProtect == PAGE_EXECUTE_READ)
- {
- /* Give it */
- DesiredAccess |= SECTION_MAP_EXECUTE;
- }
- else if ((flProtect == PAGE_EXECUTE_WRITECOPY) &&
- (NtCurrentPeb()->OSMajorVersion >= 6))
- {
- /* Give it */
- DesiredAccess |= (SECTION_MAP_WRITE | SECTION_MAP_EXECUTE);
- }
- else if ((flProtect != PAGE_READONLY) && (flProtect != PAGE_WRITECOPY))
- {
- SetLastError(ERROR_INVALID_PARAMETER);
- return NULL;
- }
-
- /* Now check if we got a name */
- if (lpName) RtlInitUnicodeString(&SectionName, lpName);
-
- /* Now convert the object attributes */
- ObjectAttributes = BaseFormatObjectAttributes(&LocalAttributes,
- lpFileMappingAttributes,
- lpName ? &SectionName : NULL);
-
- /* Check if we got a size */
- if (dwMaximumSizeLow || dwMaximumSizeHigh)
- {
- /* Use a LARGE_INTEGER and convert */
- SectionSize = &LocalSize;
- SectionSize->LowPart = dwMaximumSizeLow;
- SectionSize->HighPart = dwMaximumSizeHigh;
- }
-
- /* Make sure the handle is valid */
- if (hFile == INVALID_HANDLE_VALUE)
- {
- /* It's not, we'll only go on if we have a size */
- hFile = NULL;
- if (!SectionSize)
- {
- /* No size, so this isn't a valid non-mapped section */
- SetLastError(ERROR_INVALID_PARAMETER);
- return NULL;
- }
- }
-
- /* Now create the actual section */
- Status = NtCreateSection(&SectionHandle,
- DesiredAccess,
- ObjectAttributes,
- SectionSize,
- flProtect,
- Attributes,
- hFile);
- if (!NT_SUCCESS(Status))
- {
- /* We failed */
- BaseSetLastNTError(Status);
- return NULL;
- }
- else if (Status == STATUS_OBJECT_NAME_EXISTS)
- {
- SetLastError(ERROR_ALREADY_EXISTS);
- }
- else
- {
- SetLastError(ERROR_SUCCESS);
- }
-
- /* Return the section */
- return SectionHandle;
-}
-
-/*
- * @implemented
- */
-LPVOID
-NTAPI
-MapViewOfFileEx(HANDLE hFileMappingObject,
- DWORD dwDesiredAccess,
- DWORD dwFileOffsetHigh,
- DWORD dwFileOffsetLow,
- SIZE_T dwNumberOfBytesToMap,
- LPVOID lpBaseAddress)
-{
- NTSTATUS Status;
- LARGE_INTEGER SectionOffset;
- SIZE_T ViewSize;
- ULONG Protect;
- LPVOID ViewBase;
-
- /* Convert the offset */
- SectionOffset.LowPart = dwFileOffsetLow;
- SectionOffset.HighPart = dwFileOffsetHigh;
-
- /* Save the size and base */
- ViewBase = lpBaseAddress;
- ViewSize = dwNumberOfBytesToMap;
-
- /* Convert flags to NT Protection Attributes */
- if (dwDesiredAccess == FILE_MAP_COPY)
- {
- Protect = PAGE_WRITECOPY;
- }
- else if (dwDesiredAccess & FILE_MAP_WRITE)
- {
- Protect = (dwDesiredAccess & FILE_MAP_EXECUTE) ?
- PAGE_EXECUTE_READWRITE : PAGE_READWRITE;
- }
- else if (dwDesiredAccess & FILE_MAP_READ)
- {
- Protect = (dwDesiredAccess & FILE_MAP_EXECUTE) ?
- PAGE_EXECUTE_READ : PAGE_READONLY;
- }
- else
- {
- Protect = PAGE_NOACCESS;
- }
-
- /* Map the section */
- Status = NtMapViewOfSection(hFileMappingObject,
- NtCurrentProcess(),
- &ViewBase,
- 0,
- 0,
- &SectionOffset,
- &ViewSize,
- ViewShare,
- 0,
- Protect);
- if (!NT_SUCCESS(Status))
- {
- /* We failed */
- BaseSetLastNTError(Status);
- return NULL;
- }
-
- /* Return the base */
- return ViewBase;
-}
-
-/*
- * @implemented
- */
-LPVOID
-NTAPI
-MapViewOfFile(HANDLE hFileMappingObject,
- DWORD dwDesiredAccess,
- DWORD dwFileOffsetHigh,
- DWORD dwFileOffsetLow,
- SIZE_T dwNumberOfBytesToMap)
-{
- /* Call the extended API */
- return MapViewOfFileEx(hFileMappingObject,
- dwDesiredAccess,
- dwFileOffsetHigh,
- dwFileOffsetLow,
- dwNumberOfBytesToMap,
- NULL);
-}
-
-/*
- * @implemented
- */
-BOOL
-NTAPI
-UnmapViewOfFile(LPCVOID lpBaseAddress)
-{
- NTSTATUS Status;
-
- /* Unmap the section */
- Status = NtUnmapViewOfSection(NtCurrentProcess(), (PVOID)lpBaseAddress);
- if (!NT_SUCCESS(Status))
- {
- /* Check if the pages were protected */
- if (Status == STATUS_INVALID_PAGE_PROTECTION)
- {
- /* Flush the region if it was a "secure memory cache" */
- if (RtlFlushSecureMemoryCache((PVOID)lpBaseAddress, 0))
- {
- /* Now try to unmap again */
- Status = NtUnmapViewOfSection(NtCurrentProcess(), (PVOID)lpBaseAddress);
- if (NT_SUCCESS(Status)) return TRUE;
- }
- }
-
- /* We failed */
- BaseSetLastNTError(Status);
- return FALSE;
- }
-
- /* Otherwise, return success */
- return TRUE;
-}
-
-/*
- * @implemented
- */
-HANDLE
-NTAPI
-OpenFileMappingA(IN DWORD dwDesiredAccess,
- IN BOOL bInheritHandle,
- IN LPCSTR lpName)
-{
- ConvertOpenWin32AnsiObjectApiToUnicodeApi(FileMapping, dwDesiredAccess, bInheritHandle, lpName);
-}
-
-/*
- * @implemented
- */
- /* FIXME: Convert to the new macros */
-HANDLE
-NTAPI
-OpenFileMappingW(IN DWORD dwDesiredAccess,
- IN BOOL bInheritHandle,
- IN LPCWSTR lpName)
-{
- NTSTATUS Status;
- HANDLE SectionHandle;
- OBJECT_ATTRIBUTES ObjectAttributes;
- UNICODE_STRING UnicodeName;
-
- /* We need a name */
- if (!lpName)
- {
- /* Otherwise, fail */
- SetLastError(ERROR_INVALID_PARAMETER);
- return NULL;
- }
-
- /* Convert attributes */
- RtlInitUnicodeString(&UnicodeName, lpName);
- InitializeObjectAttributes(&ObjectAttributes,
- &UnicodeName,
- (bInheritHandle ? OBJ_INHERIT : 0),
- BaseGetNamedObjectDirectory(),
- NULL);
-
- /* Convert COPY to READ */
- if (dwDesiredAccess == FILE_MAP_COPY)
- {
- /* Fixup copy */
- dwDesiredAccess = SECTION_MAP_READ;
- }
- else if (dwDesiredAccess & FILE_MAP_EXECUTE)
- {
- /* Fixup execute */
- dwDesiredAccess = (dwDesiredAccess & ~FILE_MAP_EXECUTE) | SECTION_MAP_EXECUTE;
- }
-
- /* Open the section */
- Status = NtOpenSection(&SectionHandle, dwDesiredAccess, &ObjectAttributes);
- if (!NT_SUCCESS(Status))
- {
- /* We failed */
- BaseSetLastNTError(Status);
- return NULL;
- }
-
- /* Otherwise, return the handle */
- return SectionHandle;
-}
-
-/*
- * @implemented
- */
-BOOL
-NTAPI
-FlushViewOfFile(IN LPCVOID lpBaseAddress,
- IN SIZE_T dwNumberOfBytesToFlush)
-{
- NTSTATUS Status;
- PVOID BaseAddress = (PVOID)lpBaseAddress;
- SIZE_T NumberOfBytesToFlush = dwNumberOfBytesToFlush;
- IO_STATUS_BLOCK IoStatusBlock;
-
- /* Flush the view */
- Status = NtFlushVirtualMemory(NtCurrentProcess(),
- &BaseAddress,
- &NumberOfBytesToFlush,
- &IoStatusBlock);
- if (!NT_SUCCESS(Status) && (Status != STATUS_NOT_MAPPED_DATA))
- {
- /* We failed */
- BaseSetLastNTError(Status);
- return FALSE;
- }
-
- /* Return success */
- return TRUE;
-}
-
-/* EOF */
projects / reactos.git / blobdiff