1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ppapi/proxy/serialized_handle.h"
#include "base/check_op.h"
#include "base/files/file.h"
#include "base/notreached.h"
#include "base/pickle.h"
#include "build/build_config.h"
#include "ipc/ipc_platform_file.h"
#if BUILDFLAG(IS_NACL)
#include <unistd.h>
#endif
namespace ppapi {
namespace proxy {
SerializedHandle::SerializedHandle()
: type_(INVALID),
descriptor_(IPC::InvalidPlatformFileForTransit()),
open_flags_(0),
file_io_(0) {
}
SerializedHandle::SerializedHandle(SerializedHandle&& other)
: type_(other.type_),
shm_region_(std::move(other.shm_region_)),
descriptor_(other.descriptor_),
open_flags_(other.open_flags_),
file_io_(other.file_io_) {
other.set_null();
}
SerializedHandle& SerializedHandle::operator=(SerializedHandle&& other) {
Close();
type_ = other.type_;
shm_region_ = std::move(other.shm_region_);
descriptor_ = other.descriptor_;
open_flags_ = other.open_flags_;
file_io_ = other.file_io_;
other.set_null();
return *this;
}
SerializedHandle::SerializedHandle(Type type_param)
: type_(type_param),
descriptor_(IPC::InvalidPlatformFileForTransit()),
open_flags_(0),
file_io_(0) {
}
SerializedHandle::SerializedHandle(base::ReadOnlySharedMemoryRegion region)
: SerializedHandle(
base::ReadOnlySharedMemoryRegion::TakeHandleForSerialization(
std::move(region))) {}
SerializedHandle::SerializedHandle(base::UnsafeSharedMemoryRegion region)
: SerializedHandle(
base::UnsafeSharedMemoryRegion::TakeHandleForSerialization(
std::move(region))) {}
SerializedHandle::SerializedHandle(
base::subtle::PlatformSharedMemoryRegion region)
: type_(SHARED_MEMORY_REGION),
shm_region_(std::move(region)),
descriptor_(IPC::InvalidPlatformFileForTransit()),
open_flags_(0),
file_io_(0) {
// Writable regions are not supported.
DCHECK_NE(shm_region_.GetMode(),
base::subtle::PlatformSharedMemoryRegion::Mode::kWritable);
}
SerializedHandle::SerializedHandle(
Type type,
const IPC::PlatformFileForTransit& socket_descriptor)
: type_(type),
descriptor_(socket_descriptor),
open_flags_(0),
file_io_(0) {
}
bool SerializedHandle::IsHandleValid() const {
switch (type_) {
case SHARED_MEMORY_REGION:
return shm_region_.IsValid();
case SOCKET:
case FILE:
return !(IPC::InvalidPlatformFileForTransit() == descriptor_);
case INVALID:
return false;
// No default so the compiler will warn us if a new type is added.
}
return false;
}
void SerializedHandle::Close() {
if (IsHandleValid()) {
switch (type_) {
case INVALID:
NOTREACHED();
case SHARED_MEMORY_REGION:
shm_region_ = base::subtle::PlatformSharedMemoryRegion();
break;
case SOCKET:
case FILE:
base::File file_closer = IPC::PlatformFileForTransitToFile(descriptor_);
break;
// No default so the compiler will warn us if a new type is added.
}
}
set_null();
}
// static
void SerializedHandle::WriteHeader(const Header& hdr, base::Pickle* pickle) {
pickle->WriteInt(hdr.type);
if (hdr.type == FILE) {
pickle->WriteInt(hdr.open_flags);
pickle->WriteInt(hdr.file_io);
}
}
// static
bool SerializedHandle::ReadHeader(base::PickleIterator* iter, Header* hdr) {
*hdr = Header(INVALID, 0, 0);
int type = 0;
if (!iter->ReadInt(&type))
return false;
bool valid_type = false;
switch (type) {
case FILE: {
int open_flags = 0;
PP_Resource file_io = 0;
if (!iter->ReadInt(&open_flags) || !iter->ReadInt(&file_io))
return false;
hdr->open_flags = open_flags;
hdr->file_io = file_io;
valid_type = true;
break;
}
case SHARED_MEMORY_REGION:
case SOCKET:
case INVALID:
valid_type = true;
break;
// No default so the compiler will warn us if a new type is added.
}
if (valid_type)
hdr->type = Type(type);
return valid_type;
}
} // namespace proxy
} // namespace ppapi
|
