gfx/skia/trunk/src/ports/SkOSFile_win.cpp@129ffea94266
gfx/skia/trunk/src/ports/SkOSFile_win.cpp
Sat, 03 Jan 2015 20:18:00 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Sat, 03 Jan 2015 20:18:00 +0100
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
- permissions
- -rw-r--r--
Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.
1 /*
2 * Copyright 2013 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
8 #include "SkOSFile.h"
10 #include "SkTFitsIn.h"
12 #include <io.h>
13 #include <stdio.h>
14 #include <sys/stat.h>
16 typedef struct {
17 ULONGLONG fVolume;
18 ULONGLONG fLsbSize;
19 ULONGLONG fMsbSize;
20 } SkFILEID;
22 static bool sk_ino(SkFILE* f, SkFILEID* id) {
23 int fileno = _fileno((FILE*)f);
24 if (fileno < 0) {
25 return false;
26 }
28 HANDLE file = (HANDLE)_get_osfhandle(fileno);
29 if (INVALID_HANDLE_VALUE == file) {
30 return false;
31 }
33 //TODO: call GetFileInformationByHandleEx on Vista and later with FileIdInfo.
34 BY_HANDLE_FILE_INFORMATION info;
35 if (0 == GetFileInformationByHandle(file, &info)) {
36 return false;
37 }
38 id->fVolume = info.dwVolumeSerialNumber;
39 id->fLsbSize = info.nFileIndexLow + (((ULONGLONG)info.nFileIndexHigh) << 32);
40 id->fMsbSize = 0;
42 return true;
43 }
45 bool sk_fidentical(SkFILE* a, SkFILE* b) {
46 SkFILEID aID, bID;
47 return sk_ino(a, &aID) && sk_ino(b, &bID)
48 && aID.fLsbSize == bID.fLsbSize
49 && aID.fMsbSize == bID.fMsbSize
50 && aID.fVolume == bID.fVolume;
51 }
53 class SkAutoNullKernelHandle : SkNoncopyable {
54 public:
55 SkAutoNullKernelHandle(const HANDLE handle) : fHandle(handle) { }
56 ~SkAutoNullKernelHandle() { CloseHandle(fHandle); }
57 operator HANDLE() const { return fHandle; }
58 bool isValid() const { return NULL != fHandle; }
59 private:
60 HANDLE fHandle;
61 };
62 typedef SkAutoNullKernelHandle SkAutoWinMMap;
64 void sk_fmunmap(const void* addr, size_t) {
65 UnmapViewOfFile(addr);
66 }
68 void* sk_fdmmap(int fileno, size_t* length) {
69 HANDLE file = (HANDLE)_get_osfhandle(fileno);
70 if (INVALID_HANDLE_VALUE == file) {
71 return NULL;
72 }
74 LARGE_INTEGER fileSize;
75 if (0 == GetFileSizeEx(file, &fileSize)) {
76 //TODO: use SK_TRACEHR(GetLastError(), "Could not get file size.") to report.
77 return NULL;
78 }
79 if (!SkTFitsIn<size_t>(fileSize.QuadPart)) {
80 return NULL;
81 }
83 SkAutoWinMMap mmap(CreateFileMapping(file, NULL, PAGE_READONLY, 0, 0, NULL));
84 if (!mmap.isValid()) {
85 //TODO: use SK_TRACEHR(GetLastError(), "Could not create file mapping.") to report.
86 return NULL;
87 }
89 // Eventually call UnmapViewOfFile
90 void* addr = MapViewOfFile(mmap, FILE_MAP_READ, 0, 0, 0);
91 if (NULL == addr) {
92 //TODO: use SK_TRACEHR(GetLastError(), "Could not map view of file.") to report.
93 return NULL;
94 }
96 *length = static_cast<size_t>(fileSize.QuadPart);
97 return addr;
98 }
100 int sk_fileno(SkFILE* f) {
101 return _fileno((FILE*)f);
102 }
104 void* sk_fmmap(SkFILE* f, size_t* length) {
105 int fileno = sk_fileno(f);
106 if (fileno < 0) {
107 return NULL;
108 }
110 return sk_fdmmap(fileno, length);
111 }
