From 1585730ec1882c97dcd35dfabba0bb63078169aa Mon Sep 17 00:00:00 2001
From: Ben Vanik <ben.vanik@gmail.com>
Date: Wed, 30 Jan 2013 02:48:34 -0800
Subject: [PATCH] Running on Windows! Minus gflags parsing right now.

---
 common.gypi           |   2 +-
 src/core/mmap_win.cc  | 132 ++++++++++++++++++++++++++++++++++++++++++
 src/core/sources.gypi |   1 +
 3 files changed, 134 insertions(+), 1 deletion(-)
 create mode 100644 src/core/mmap_win.cc

diff --git a/common.gypi b/common.gypi
index 0b60f4282..9624a88a6 100644
--- a/common.gypi
+++ b/common.gypi
@@ -153,7 +153,7 @@
         },
         'msvs_settings': {
           'VCCLCompilerTool': {
-            'Optimization': '2',
+            'Optimization': '0',
             'BasicRuntimeChecks': '0',  # disable /RTC1 when compiling /O2
             'DebugInformationFormat': '3',
             'ExceptionHandling': '0',
diff --git a/src/core/mmap_win.cc b/src/core/mmap_win.cc
new file mode 100644
index 000000000..3dd245252
--- /dev/null
+++ b/src/core/mmap_win.cc
@@ -0,0 +1,132 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2013 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#include <xenia/core/mmap.h>
+
+
+typedef struct xe_mmap {
+  xe_ref_t ref;
+
+  HANDLE file_handle;
+  HANDLE mmap_handle;
+
+  void* addr;
+  size_t length;
+} xe_mmap_t;
+
+
+xe_mmap_ref xe_mmap_open(xe_pal_ref pal, const xe_file_mode mode,
+                         const xechar_t *path,
+                         const size_t offset, const size_t length) {
+  xe_mmap_ref mmap = (xe_mmap_ref)xe_calloc(sizeof(xe_mmap_t));
+  xe_ref_init((xe_ref)mmap);
+
+  DWORD fileAccess      = 0;
+  DWORD fileShare       = 0;
+  DWORD createMode      = 0;
+  DWORD mappingProtect  = 0;
+  DWORD viewAccess      = 0;
+  switch (mode) {
+  case kXEFileModeRead:
+      fileAccess      |= GENERIC_READ;
+      fileShare       |= FILE_SHARE_READ;
+      createMode      |= OPEN_EXISTING;
+      mappingProtect  |= PAGE_READONLY;
+      viewAccess      |= FILE_MAP_READ;
+      break;
+  case kXEFileModeWrite:
+      fileAccess      |= GENERIC_WRITE;
+      fileShare       |= 0;
+      createMode      |= OPEN_ALWAYS;
+      mappingProtect  |= PAGE_READWRITE;
+      viewAccess      |= FILE_MAP_WRITE;
+      break;
+  case kXEFileModeRead | kXEFileModeWrite:
+      fileAccess      |= GENERIC_READ | GENERIC_WRITE;
+      fileShare       |= 0;
+      createMode      |= OPEN_EXISTING;
+      mappingProtect  |= PAGE_READWRITE;
+      viewAccess      |= FILE_MAP_READ | FILE_MAP_WRITE;
+      break;
+  }
+
+  SYSTEM_INFO systemInfo;
+  GetSystemInfo(&systemInfo);
+
+  const size_t aligned_offset =
+      offset & (~(systemInfo.dwAllocationGranularity - 1));
+  const size_t aligned_length =
+      length + (offset - aligned_offset);
+
+  HANDLE file_handle = CreateFile(
+      path, fileAccess, fileShare, NULL, createMode, FILE_ATTRIBUTE_NORMAL,
+      NULL);
+  XEEXPECTNOTNULL(file_handle);
+
+  HANDLE handle = CreateFileMapping(
+      file_handle, NULL, mappingProtect, 0, 0, NULL);
+  //(DWORD)(aligned_length >> 32), (DWORD)(aligned_length & 0xFFFFFFFF), NULL);
+  XEEXPECTNOTNULL(handle);
+
+  void* address = MapViewOfFile(handle, viewAccess,
+                                (DWORD)(aligned_offset >> 32),
+                                (DWORD)(aligned_offset & 0xFFFFFFFF),
+                                aligned_length);
+  XEEXPECTNOTNULL(address);
+
+  mmap->file_handle = file_handle;
+  mmap->mmap_handle = handle;
+  mmap->addr        = address;
+  if (!length) {
+    mmap->length = length;
+  } else {
+    size_t map_length = GetFileSize(file_handle, NULL);
+    mmap->length = map_length;
+  }
+  
+  return mmap;
+
+XECLEANUP:
+  xe_mmap_release(mmap);
+  return NULL;
+}
+
+void xe_mmap_dealloc(xe_mmap_ref mmap) {
+  if (mmap->addr) {
+    UnmapViewOfFile(mmap->addr);
+    mmap->addr = NULL;
+  }
+
+  if (mmap->mmap_handle) {
+    CloseHandle(mmap->mmap_handle);
+    mmap->mmap_handle = NULL;
+  }
+
+  if (mmap->file_handle) {
+    CloseHandle(mmap->file_handle);
+    mmap->file_handle = NULL;
+  }
+}
+
+xe_mmap_ref xe_mmap_retain(xe_mmap_ref mmap) {
+  xe_ref_retain((xe_ref)mmap);
+  return mmap;
+}
+
+void xe_mmap_release(xe_mmap_ref mmap) {
+  xe_ref_release((xe_ref)mmap, (xe_ref_dealloc_t)xe_mmap_dealloc);
+}
+
+void* xe_mmap_get_addr(xe_mmap_ref mmap) {
+  return mmap->addr;
+}
+
+size_t xe_mmap_get_length(xe_mmap_ref mmap) {
+  return mmap->length;
+}
diff --git a/src/core/sources.gypi b/src/core/sources.gypi
index b16056af9..459b11a1a 100644
--- a/src/core/sources.gypi
+++ b/src/core/sources.gypi
@@ -15,6 +15,7 @@
     }],
     ['OS == "win"', {
       'sources': [
+        'mmap_win.cc',
       ],
     }],
   ],