ref: a2fe8877266400976ef738e0ffc3d6ecfc8b1535
parent: 78e4c2833de6ae33f70dcfb9f5f656658eac2dfc
author: Russell Rice <rtc_marine@hotmail.com>
date: Sat Oct 11 03:17:40 EDT 2008
- Use FILE_MAP_COPY instead of FILE_MAP_ALL_ACCESS for memory mapped files, the latter prevented it from working at all Subversion-branch: /branches/raven-branch Subversion-revision: 1354
--- a/src/w_file_win32.c
+++ b/src/w_file_win32.c
@@ -1,185 +1,185 @@
-// Emacs style mode select -*- C++ -*-
-//-----------------------------------------------------------------------------
-//
-// Copyright(C) 1993-1996 Id Software, Inc.
-// Copyright(C) 2008 Simon Howard
-//
-// This program is free software; you can redistribute it and/or
-// modify it under the terms of the GNU General Public License
-// as published by the Free Software Foundation; either version 2
-// of the License, or (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program; if not, write to the Free Software
-// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
-// 02111-1307, USA.
-//
-// DESCRIPTION:
-// WAD I/O functions.
-//
-//-----------------------------------------------------------------------------
-
-#include "config.h"
-
-#ifdef _WIN32
-
-#define WIN32_LEAN_AND_MEAN
-#include <windows.h>
-
-#include "i_system.h"
-#include "w_file.h"
-#include "z_zone.h"
-
-typedef struct
-{- wad_file_t wad;
- HANDLE handle;
- HANDLE handle_map;
-} win32_wad_file_t;
-
-extern wad_file_class_t win32_wad_file;
-
-static void MapFile(win32_wad_file_t *wad, char *filename)
-{- wad->handle_map = CreateFileMapping(wad->handle,
- NULL,
- PAGE_WRITECOPY,
- 0,
- 0,
- NULL);
-
- if (wad->handle_map == NULL)
- {- fprintf(stderr, "W_Win32_OpenFile: Unable to CreateFileMapping() "
- "for %s\n", filename);
- return;
- }
-
- wad->wad.mapped = MapViewOfFile(wad->handle_map,
- FILE_MAP_ALL_ACCESS,
- 0, 0, 0);
-
- if (wad->wad.mapped == NULL)
- {- fprintf(stderr, "W_Win32_OpenFile: Unable to MapViewOfFile() for %s\n",
- filename);
- }
-}
-
-unsigned int GetFileLength(HANDLE handle)
-{- DWORD result;
-
- result = SetFilePointer(handle, 0, NULL, FILE_END);
-
- if (result == INVALID_SET_FILE_POINTER)
- {- I_Error("W_Win32_OpenFile: Failed to read file length");- }
-
- return result;
-}
-
-static wad_file_t *W_Win32_OpenFile(char *path)
-{- win32_wad_file_t *result;
- HANDLE handle;
- OFSTRUCT fileinfo;
-
- handle = (HANDLE) OpenFile(path, &fileinfo, OF_READ);
-
- if (handle == (HANDLE) HFILE_ERROR)
- {- return NULL;
- }
-
- // Create a new win32_wad_file_t to hold the file handle.
-
- result = Z_Malloc(sizeof(win32_wad_file_t), PU_STATIC, 0);
- result->wad.file_class = &win32_wad_file;
- result->wad.length = GetFileLength(handle);
- result->handle = handle;
-
- // Try to map the file into memory with mmap:
-
- MapFile(result, path);
-
- return &result->wad;
-}
-
-static void W_Win32_CloseFile(wad_file_t *wad)
-{- win32_wad_file_t *win32_wad;
-
- win32_wad = (win32_wad_file_t *) wad;
-
- // If mapped, unmap it.
-
- if (win32_wad->wad.mapped != NULL)
- {- UnmapViewOfFile(win32_wad->wad.mapped);
- }
-
- if (win32_wad->handle_map != NULL)
- {- CloseHandle(win32_wad->handle_map);
- }
-
- // Close the file
-
- if (win32_wad->handle != NULL)
- {- CloseHandle(win32_wad->handle);
- }
-
- Z_Free(win32_wad);
-}
-
-// Read data from the specified position in the file into the
-// provided buffer. Returns the number of bytes read.
-
-size_t W_Win32_Read(wad_file_t *wad, unsigned int offset,
- void *buffer, size_t buffer_len)
-{- win32_wad_file_t *win32_wad;
- DWORD bytes_read;
- DWORD result;
-
- win32_wad = (win32_wad_file_t *) wad;
-
- // Jump to the specified position in the file.
-
- result = SetFilePointer(win32_wad->handle, offset, NULL, FILE_BEGIN);
-
- if (result == INVALID_SET_FILE_POINTER)
- {- I_Error("W_Win32_Read: Failed to set file pointer to %i",- offset);
- }
-
- // Read into the buffer.
-
- if (!ReadFile(win32_wad->handle, buffer, buffer_len, &bytes_read, NULL))
- {- I_Error("W_Win32_Read: Error reading from file");- }
-
- return bytes_read;
-}
-
-
-wad_file_class_t win32_wad_file =
-{- W_Win32_OpenFile,
- W_Win32_CloseFile,
- W_Win32_Read,
-};
-
-
-#endif /* #ifdef _WIN32 */
-
+// Emacs style mode select -*- C++ -*-
+//-----------------------------------------------------------------------------
+//
+// Copyright(C) 1993-1996 Id Software, Inc.
+// Copyright(C) 2008 Simon Howard
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License
+// as published by the Free Software Foundation; either version 2
+// of the License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+// 02111-1307, USA.
+//
+// DESCRIPTION:
+// WAD I/O functions.
+//
+//-----------------------------------------------------------------------------
+
+#include "config.h"
+
+#ifdef _WIN32
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+
+#include "i_system.h"
+#include "w_file.h"
+#include "z_zone.h"
+
+typedef struct
+{
+ wad_file_t wad;
+ HANDLE handle;
+ HANDLE handle_map;
+} win32_wad_file_t;
+
+extern wad_file_class_t win32_wad_file;
+
+static void MapFile(win32_wad_file_t *wad, char *filename)
+{
+ wad->handle_map = CreateFileMapping(wad->handle,
+ NULL,
+ PAGE_WRITECOPY,
+ 0,
+ 0,
+ NULL);
+
+ if (wad->handle_map == NULL)
+ {
+ fprintf(stderr, "W_Win32_OpenFile: Unable to CreateFileMapping() "
+ "for %s\n", filename);
+ return;
+ }
+
+ wad->wad.mapped = MapViewOfFile(wad->handle_map,
+ FILE_MAP_COPY,
+ 0, 0, 0);
+
+ if (wad->wad.mapped == NULL)
+ {
+ fprintf(stderr, "W_Win32_OpenFile: Unable to MapViewOfFile() for %s\n",
+ filename);
+ }
+}
+
+unsigned int GetFileLength(HANDLE handle)
+{
+ DWORD result;
+
+ result = SetFilePointer(handle, 0, NULL, FILE_END);
+
+ if (result == INVALID_SET_FILE_POINTER)
+ {
+ I_Error("W_Win32_OpenFile: Failed to read file length");
+ }
+
+ return result;
+}
+
+static wad_file_t *W_Win32_OpenFile(char *path)
+{
+ win32_wad_file_t *result;
+ HANDLE handle;
+ OFSTRUCT fileinfo;
+
+ handle = (HANDLE) OpenFile(path, &fileinfo, OF_READ);
+
+ if (handle == (HANDLE) HFILE_ERROR)
+ {
+ return NULL;
+ }
+
+ // Create a new win32_wad_file_t to hold the file handle.
+
+ result = Z_Malloc(sizeof(win32_wad_file_t), PU_STATIC, 0);
+ result->wad.file_class = &win32_wad_file;
+ result->wad.length = GetFileLength(handle);
+ result->handle = handle;
+
+ // Try to map the file into memory with mmap:
+
+ MapFile(result, path);
+
+ return &result->wad;
+}
+
+static void W_Win32_CloseFile(wad_file_t *wad)
+{
+ win32_wad_file_t *win32_wad;
+
+ win32_wad = (win32_wad_file_t *) wad;
+
+ // If mapped, unmap it.
+
+ if (win32_wad->wad.mapped != NULL)
+ {
+ UnmapViewOfFile(win32_wad->wad.mapped);
+ }
+
+ if (win32_wad->handle_map != NULL)
+ {
+ CloseHandle(win32_wad->handle_map);
+ }
+
+ // Close the file
+
+ if (win32_wad->handle != NULL)
+ {
+ CloseHandle(win32_wad->handle);
+ }
+
+ Z_Free(win32_wad);
+}
+
+// Read data from the specified position in the file into the
+// provided buffer. Returns the number of bytes read.
+
+size_t W_Win32_Read(wad_file_t *wad, unsigned int offset,
+ void *buffer, size_t buffer_len)
+{
+ win32_wad_file_t *win32_wad;
+ DWORD bytes_read;
+ DWORD result;
+
+ win32_wad = (win32_wad_file_t *) wad;
+
+ // Jump to the specified position in the file.
+
+ result = SetFilePointer(win32_wad->handle, offset, NULL, FILE_BEGIN);
+
+ if (result == INVALID_SET_FILE_POINTER)
+ {
+ I_Error("W_Win32_Read: Failed to set file pointer to %i",
+ offset);
+ }
+
+ // Read into the buffer.
+
+ if (!ReadFile(win32_wad->handle, buffer, buffer_len, &bytes_read, NULL))
+ {
+ I_Error("W_Win32_Read: Error reading from file");
+ }
+
+ return bytes_read;
+}
+
+
+wad_file_class_t win32_wad_file =
+{
+ W_Win32_OpenFile,
+ W_Win32_CloseFile,
+ W_Win32_Read,
+};
+
+
+#endif /* #ifdef _WIN32 */
+