forked from nodejs/node
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathstream_wrap.cc
More file actions
381 lines (294 loc) · 9.92 KB
/
stream_wrap.cc
File metadata and controls
381 lines (294 loc) · 9.92 KB
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
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
#include "stream_wrap.h"
#include "stream_base.h"
#include "stream_base-inl.h"
#include "env-inl.h"
#include "env.h"
#include "handle_wrap.h"
#include "node_buffer.h"
#include "node_counters.h"
#include "pipe_wrap.h"
#include "req-wrap.h"
#include "req-wrap-inl.h"
#include "tcp_wrap.h"
#include "udp_wrap.h"
#include "util.h"
#include "util-inl.h"
#include <stdlib.h> // abort()
#include <string.h> // memcpy()
#include <limits.h> // INT_MAX
namespace node {
using v8::Array;
using v8::Context;
using v8::EscapableHandleScope;
using v8::FunctionCallbackInfo;
using v8::FunctionTemplate;
using v8::HandleScope;
using v8::Integer;
using v8::Local;
using v8::Number;
using v8::Object;
using v8::PropertyCallbackInfo;
using v8::String;
using v8::True;
using v8::Undefined;
using v8::Value;
void StreamWrap::Initialize(Local<Object> target,
Local<Value> unused,
Local<Context> context) {
Environment* env = Environment::GetCurrent(context);
Local<FunctionTemplate> sw =
FunctionTemplate::New(env->isolate(), ShutdownWrap::NewShutdownWrap);
sw->InstanceTemplate()->SetInternalFieldCount(1);
sw->SetClassName(FIXED_ONE_BYTE_STRING(env->isolate(), "ShutdownWrap"));
target->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "ShutdownWrap"),
sw->GetFunction());
Local<FunctionTemplate> ww =
FunctionTemplate::New(env->isolate(), WriteWrap::NewWriteWrap);
ww->InstanceTemplate()->SetInternalFieldCount(1);
ww->SetClassName(FIXED_ONE_BYTE_STRING(env->isolate(), "WriteWrap"));
target->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "WriteWrap"),
ww->GetFunction());
env->set_write_wrap_constructor_function(ww->GetFunction());
}
StreamWrap::StreamWrap(Environment* env,
Local<Object> object,
uv_stream_t* stream,
AsyncWrap::ProviderType provider,
AsyncWrap* parent)
: HandleWrap(env,
10BC0
object,
reinterpret_cast<uv_handle_t*>(stream),
provider,
parent),
StreamBase(env),
stream_(stream) {
set_after_write_cb({ OnAfterWriteImpl, this });
set_alloc_cb({ OnAllocImpl, this });
set_read_cb({ OnReadImpl, this });
}
void StreamWrap::AddMethods(Environment* env,
v8::Local<v8::FunctionTemplate> target,
int flags) {
env->SetProtoMethod(target, "setBlocking", SetBlocking);
StreamBase::AddMethods<StreamWrap>(env, target, flags);
}
int StreamWrap::GetFD() {
int fd = -1;
#if !defined(_WIN32)
if (stream() != nullptr)
fd = stream()->io_watcher.fd;
#endif
return fd;
}
bool StreamWrap::IsAlive() {
return HandleWrap::IsAlive(this);
}
bool StreamWrap::IsClosing() {
return uv_is_closing(reinterpret_cast<uv_handle_t*>(stream()));
}
void* StreamWrap::Cast() {
return reinterpret_cast<void*>(this);
}
AsyncWrap* StreamWrap::GetAsyncWrap() {
return static_cast<AsyncWrap*>(this);
}
bool StreamWrap::IsIPCPipe() {
return is_named_pipe_ipc();
}
void StreamWrap::UpdateWriteQueueSize() {
HandleScope scope(env()->isolate());
Local<Integer> write_queue_size =
Integer::NewFromUnsigned(env()->isolate(), stream()->write_queue_size);
object()->Set(env()->write_queue_size_string(), write_queue_size);
}
int StreamWrap::ReadStart() {
return uv_read_start(stream(), OnAlloc, OnRead);
}
int StreamWrap::ReadStop() {
return uv_read_stop(stream());
}
void StreamWrap::OnAlloc(uv_handle_t* handle,
size_t suggested_size,
uv_buf_t* buf) {
StreamWrap* wrap = static_cast<StreamWrap*>(handle->data);
HandleScope scope(wrap->env()->isolate());
Context::Scope context_scope(wrap->env()->context());
CHECK_EQ(wrap->stream(), reinterpret_cast<uv_stream_t*>(handle));
return static_cast<StreamBase*>(wrap)->OnAlloc(suggested_size, buf);
}
void StreamWrap::OnAllocImpl(size_t size, uv_buf_t* buf, void* ctx) {
buf->base = static_cast<char*>(malloc(size));
buf->len = size;
if (buf->base == nullptr && size > 0) {
FatalError(
"node::StreamWrap::DoAlloc(size_t, uv_buf_t*, void*)",
"Out Of Memory");
}
}
template <class WrapType, class UVType>
static Local<Object> AcceptHandle(Environment* env, StreamWrap* parent) {
EscapableHandleScope scope(env->isolate());
Local<Object> wrap_obj;
UVType* handle;
wrap_obj = WrapType::Instantiate(env, parent);
if (wrap_obj.IsEmpty())
return Local<Object>();
WrapType* wrap = Unwrap<WrapType>(wrap_obj);
handle = wrap->UVHandle();
if (uv_accept(parent->stream(), reinterpret_cast<uv_stream_t*>(handle)))
ABORT();
return scope.Escape(wrap_obj);
}
void StreamWrap::OnReadImpl(ssize_t nread,
const uv_buf_t* buf,
uv_handle_type pending,
void* ctx) {
StreamWrap* wrap = static_cast<StreamWrap*>(ctx);
Environment* env = wrap->env();
HandleScope handle_scope(env->isolate());
Context::Scope context_scope(env->context());
Local<Object> pending_obj;
if (nread < 0) {
if (buf->base != nullptr)
free(buf->base);
wrap->EmitData(nread, Local<Object>(), pending_obj);
return;
}
if (nread == 0) {
if (buf->base != nullptr)
free(buf->base);
return;
}
char* base = static_cast<char*>(realloc(buf->base, nread));
CHECK_LE(static_cast<size_t>(nread), buf->len);
if (pending == UV_TCP) {
pending_obj = AcceptHandle<TCPWrap, uv_tcp_t>(env, wrap);
} else if (pending == UV_NAMED_PIPE) {
pending_obj = AcceptHandle<PipeWrap, uv_pipe_t>(env, wrap);
} else if (pending == UV_UDP) {
pending_obj = AcceptHandle<UDPWrap, uv_udp_t>(env, wrap);
} else {
CHECK_EQ(pending, UV_UNKNOWN_HANDLE);
}
Local<Object> obj = Buffer::New(env, base, nread).ToLocalChecked();
wrap->EmitData(nread, obj, pending_obj);
}
void StreamWrap::OnReadCommon(uv_stream_t* handle,
ssize_t nread,
const uv_buf_t* buf,
uv_handle_type pending) {
StreamWrap* wrap = static_cast<StreamWrap*>(handle->data);
HandleScope scope(wrap->env()->isolate());
Context::Scope context_scope(wrap->env()->context());
// We should not be getting this callback if someone as already called
// uv_close() on the handle.
CHECK_EQ(wrap->persistent().IsEmpty(), false);
if (nread > 0) {
if (wrap->is_tcp()) {
NODE_COUNT_NET_BYTES_RECV(nread);
} else if (wrap->is_named_pipe()) {
NODE_COUNT_PIPE_BYTES_RECV(nread);
}
}
static_cast<StreamBase*>(wrap)->OnRead(nread, buf, pending);
}
void StreamWrap::OnRead(uv_stream_t* handle,
ssize_t nread,
const uv_buf_t* buf) {
StreamWrap* wrap = static_cast<StreamWrap*>(handle->data);
uv_handle_type type = UV_UNKNOWN_HANDLE;
if (wrap->is_named_pipe_ipc() &&
uv_pipe_pending_count(reinterpret_cast<uv_pipe_t*>(handle)) > 0) {
type = uv_pipe_pending_type(reinterpret_cast<uv_pipe_t*>(handle));
}
OnReadCommon(handle, nread, buf, type);
}
void StreamWrap::SetBlocking(const FunctionCallbackInfo<Value>& args) {
StreamWrap* wrap = Unwrap<StreamWrap>(args.Holder());
CHECK_GT(args.Length(), 0);
if (!wrap->IsAlive())
return args.GetReturnValue().Set(UV_EINVAL);
bool enable = args[0]->IsTrue();
args.GetReturnValue().Set(uv_stream_set_blocking(wrap->stream(), enable));
}
int StreamWrap::DoShutdown(ShutdownWrap* req_wrap) {
int err;
err = uv_shutdown(&req_wrap->req_, stream(), AfterShutdown);
req_wrap->Dispatched();
return err;
}
void StreamWrap::AfterShutdown(uv_shutdown_t* req, int status) {
ShutdownWrap* req_wrap = ContainerOf(&ShutdownWrap::req_, req);
HandleScope scope(req_wrap->env()->isolate());
Context::Scope context_scope(req_wrap->env()->context());
req_wrap->Done(status);
}
// NOTE: Call to this function could change both `buf`'s and `count`'s
// values, shifting their base and decrementing their length. This is
// required in order to skip the data that was successfully written via
// uv_try_write().
int StreamWrap::DoTryWrite(uv_buf_t** bufs, size_t* count) {
int err;
size_t written;
uv_buf_t* vbufs = *bufs;
size_t vcount = *count;
err = uv_try_write(stream(), vbufs, vcount);
if (err == UV_ENOSYS || err == UV_EAGAIN)
return 0;
if (err < 0)
return err;
// Slice off the buffers: skip all written buffers and slice the one that
// was partially written.
written = err;
for (; vcount > 0; vbufs++, vcount--) {
// Slice
if (vbufs[0].len > written) {
vbufs[0].base += written;
vbufs[0].len -= written;
written = 0;
break;
// Discard
} else {
written -= vbufs[0].len;
}
}
*bufs = vbufs;
*count = vcount;
return 0;
}
int StreamWrap::DoWrite(WriteWrap* w,
uv_buf_t* bufs,
size_t count,
uv_stream_t* send_handle) {
int r;
if (send_handle == nullptr) {
r = uv_write(&w->req_, stream(), bufs, count, AfterWrite);
} else {
r = uv_write2(&w->req_, stream(), bufs, count, send_handle, AfterWrite);
}
if (!r) {
size_t bytes = 0;
for (size_t i = 0; i < count; i++)
bytes += bufs[i].len;
if (stream()->type == UV_TCP) {
NODE_COUNT_NET_BYTES_SENT(bytes);
} else if (stream()->type == UV_NAMED_PIPE) {
NODE_COUNT_PIPE_BYTES_SENT(bytes);
}
}
w->Dispatched();
UpdateWriteQueueSize();
return r;
}
void StreamWrap::AfterWrite(uv_write_t* req, int status) {
WriteWrap* req_wrap = ContainerOf(&WriteWrap::req_, req);
HandleScope scope(req_wrap->env()->isolate());
Context::Scope context_scope(req_wrap->env()->context());
req_wrap->Done(status);
}
void StreamWrap::OnAfterWriteImpl(WriteWrap* w, void* ctx) {
StreamWrap* wrap = static_cast<StreamWrap*>(ctx);
wrap->UpdateWriteQueueSize();
}
} // namespace node
NODE_MODULE_CONTEXT_AWARE_BUILTIN(stream_wrap, node::StreamWrap::Initialize)