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
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
|
#ifndef SRC_STREAM_WRAP_H_
#define SRC_STREAM_WRAP_H_
#include "env.h"
#include "handle_wrap.h"
#include "req_wrap.h"
#include "string_bytes.h"
#include "v8.h"
namespace node {
// Forward declaration
class StreamWrap;
class ShutdownWrap : public ReqWrap<uv_shutdown_t> {
public:
ShutdownWrap(Environment* env, v8::Local<v8::Object> req_wrap_obj)
: ReqWrap(env, req_wrap_obj, AsyncWrap::PROVIDER_SHUTDOWNWRAP) {
Wrap(req_wrap_obj, this);
}
static void NewShutdownWrap(const v8::FunctionCallbackInfo<v8::Value>& args) {
CHECK(args.IsConstructCall());
}
};
class WriteWrap: public ReqWrap<uv_write_t> {
public:
// TODO(trevnorris): WrapWrap inherits from ReqWrap, which I've globbed
// into the same provider. How should these be broken apart?
WriteWrap(Environment* env, v8::Local<v8::Object> obj, StreamWrap* wrap)
: ReqWrap(env, obj, AsyncWrap::PROVIDER_WRITEWRAP),
wrap_(wrap) {
Wrap(obj, this);
}
void* operator new(size_t size, char* storage) { return storage; }
// This is just to keep the compiler happy. It should never be called, since
// we don't use exceptions in node.
void operator delete(void* ptr, char* storage) { UNREACHABLE(); }
inline StreamWrap* wrap() const {
return wrap_;
}
static void NewWriteWrap(const v8::FunctionCallbackInfo<v8::Value>& args) {
CHECK(args.IsConstructCall());
}
private:
// People should not be using the non-placement new and delete operator on a
// WriteWrap. Ensure this never happens.
void* operator new(size_t size) { UNREACHABLE(); }
void operator delete(void* ptr) { UNREACHABLE(); }
StreamWrap* const wrap_;
};
// Overridable callbacks' types
class StreamWrapCallbacks {
public:
explicit StreamWrapCallbacks(StreamWrap* wrap) : wrap_(wrap) {
}
explicit StreamWrapCallbacks(StreamWrapCallbacks* old) : wrap_(old->wrap()) {
}
virtual ~StreamWrapCallbacks() = default;
virtual const char* Error() const;
virtual void ClearError();
virtual int TryWrite(uv_buf_t** bufs, size_t* count);
virtual int DoWrite(WriteWrap* w,
uv_buf_t* bufs,
size_t count,
uv_stream_t* send_handle,
uv_write_cb cb);
virtual void AfterWrite(WriteWrap* w);
virtual void DoAlloc(uv_handle_t* handle,
size_t suggested_size,
uv_buf_t* buf);
virtual void DoRead(uv_stream_t* handle,
ssize_t nread,
const uv_buf_t* buf,
uv_handle_type pending);
virtual int DoShutdown(ShutdownWrap* req_wrap, uv_shutdown_cb cb);
protected:
inline StreamWrap* wrap() const {
return wrap_;
}
private:
StreamWrap* const wrap_;
};
class StreamWrap : public HandleWrap {
public:
static void Initialize(v8::Handle<v8::Object> target,
v8::Handle<v8::Value> unused,
v8::Handle<v8::Context> context);
void OverrideCallbacks(StreamWrapCallbacks* callbacks, bool gc) {
StreamWrapCallbacks* old = callbacks_;
callbacks_ = callbacks;
callbacks_gc_ = gc;
if (old != &default_callbacks_)
delete old;
}
static void GetFD(v8::Local<v8::String>,
const v8::PropertyCallbackInfo<v8::Value>&);
// JavaScript functions
static void ReadStart(const v8::FunctionCallbackInfo<v8::Value>& args);
static void ReadStop(const v8::FunctionCallbackInfo<v8::Value>& args);
static void Shutdown(const v8::FunctionCallbackInfo<v8::Value>& args);
static void Writev(const v8::FunctionCallbackInfo<v8::Value>& args);
static void WriteBuffer(const v8::FunctionCallbackInfo<v8::Value>& args);
static void WriteAsciiString(const v8::FunctionCallbackInfo<v8::Value>& args);
static void WriteUtf8String(const v8::FunctionCallbackInfo<v8::Value>& args);
static void WriteUcs2String(const v8::FunctionCallbackInfo<v8::Value>& args);
static void WriteBinaryString(
const v8::FunctionCallbackInfo<v8::Value>& args);
static void SetBlocking(const v8::FunctionCallbackInfo<v8::Value>& args);
inline StreamWrapCallbacks* callbacks() const {
return callbacks_;
}
inline uv_stream_t* stream() const {
return stream_;
}
inline bool is_named_pipe() const {
return stream()->type == UV_NAMED_PIPE;
}
inline bool is_named_pipe_ipc() const {
return is_named_pipe() &&
reinterpret_cast<const uv_pipe_t*>(stream())->ipc != 0;
}
inline bool is_tcp() const {
return stream()->type == UV_TCP;
}
protected:
static size_t WriteBuffer(v8::Handle<v8::Value> val, uv_buf_t* buf);
StreamWrap(Environment* env,
v8::Local<v8::Object> object,
uv_stream_t* stream,
AsyncWrap::ProviderType provider,
AsyncWrap* parent = nullptr);
~StreamWrap() {
if (!callbacks_gc_ && callbacks_ != &default_callbacks_) {
delete callbacks_;
}
callbacks_ = nullptr;
}
void StateChange() { }
void UpdateWriteQueueSize();
private:
// Callbacks for libuv
static void AfterWrite(uv_write_t* req, int status);
static void OnAlloc(uv_handle_t* handle,
size_t suggested_size,
uv_buf_t* buf);
static void AfterShutdown(uv_shutdown_t* req, int status);
static void OnRead(uv_stream_t* handle,
ssize_t nread,
const uv_buf_t* buf);
static void OnReadCommon(uv_stream_t* handle,
ssize_t nread,
const uv_buf_t* buf,
uv_handle_type pending);
template <enum encoding encoding>
static void WriteStringImpl(const v8::FunctionCallbackInfo<v8::Value>& args);
uv_stream_t* const stream_;
StreamWrapCallbacks default_callbacks_;
StreamWrapCallbacks* callbacks_; // Overridable callbacks
bool callbacks_gc_;
friend class StreamWrapCallbacks;
};
} // namespace node
#endif // SRC_STREAM_WRAP_H_
|