1 /*
2 * Copyright (c) 2012 Joyent, Inc. All rights reserved.
3 */
4
5 #include <sys/types.h>
6 #include <string.h>
7 #include <new>
8 #include <unordered_map>
9 #include <stdlib.h>
10 #include <node.h>
11 #include "v8plus_impl.h"
12 #include "v8plus_glue.h"
13
14 #define METHOD_NAME_FMT "__v8plus_%s_%s"
15
16 v8::Persistent<v8::Function> v8plus::ObjectWrap::_constructor;
17 v8plus_method_descr_t *v8plus::ObjectWrap::_mtbl;
18 v8plus_static_descr_t *v8plus::ObjectWrap::_stbl;
19 std::unordered_map<void *, v8plus::ObjectWrap *> v8plus::ObjectWrap::_objhash;
20
21 static char *
22 function_name(const char *lambda)
23 {
24 char *fn;
25 size_t len;
26
27 len = snprintf(NULL, 0, METHOD_NAME_FMT,
28 v8plus_js_class_name, lambda);
29 if ((fn = (char *)malloc(len + 1)) == NULL)
30 v8plus_panic("out of memory for function name for %s", lambda);
31
32 (void) snprintf(fn, len + 1, METHOD_NAME_FMT,
33 v8plus_js_class_name, lambda);
34
35 return (fn);
36 }
37
38 void
39 v8plus::ObjectWrap::init(v8::Handle<v8::Object> target)
40 {
41 uint_t i;
42
43 if (v8plus_static_method_count > 0) {
44 const v8plus_static_descr_t *sdp;
45
46 _stbl = new (std::nothrow)
47 v8plus_static_descr_t[v8plus_static_method_count];
48 if (_stbl == NULL)
49 v8plus_panic("out of memory for static method table");
50
51 for (i = 0; i < v8plus_static_method_count; i++) {
52 v8::Local<v8::FunctionTemplate> fth =
53 v8::FunctionTemplate::New(_static_entry);
54 v8::Local<v8::Function> fh = fth->GetFunction();
55 sdp = &v8plus_static_methods[i];
56
57 _stbl[i].sd_name = function_name(sdp->sd_name);
58 _stbl[i].sd_c_func = sdp->sd_c_func;
59
60 fh->SetName(v8::String::New(_stbl[i].sd_name));
61
62 target->Set(v8::String::NewSymbol(sdp->sd_name), fh);
63 }
64 }
65
66
67 if (v8plus_method_count > 0) {
68 v8::Local<v8::FunctionTemplate> tpl =
69 v8::FunctionTemplate::New(_new);
70 const v8plus_method_descr_t *mdp;
71
72 _mtbl = new (std::nothrow)
73 v8plus_method_descr_t[v8plus_method_count];
74 if (_mtbl == NULL)
75 v8plus_panic("out of memory for method table");
76
77 tpl->SetClassName(v8::String::NewSymbol(v8plus_js_class_name));
78 tpl->InstanceTemplate()->SetInternalFieldCount(
79 v8plus_method_count);
80
81 for (i = 0; i < v8plus_method_count; i++) {
82 v8::Local<v8::FunctionTemplate> fth =
83 v8::FunctionTemplate::New(_entry);
84 v8::Local<v8::Function> fh = fth->GetFunction();
85 mdp = &v8plus_methods[i];
86
87 _mtbl[i].md_name = function_name(mdp->md_name);
88 _mtbl[i].md_c_func = mdp->md_c_func;
89
90 fh->SetName(v8::String::New(_mtbl[i].md_name));
91
92 tpl->PrototypeTemplate()->Set(
93 v8::String::NewSymbol(mdp->md_name), fh);
94 }
95
96 _constructor =
97 v8::Persistent<v8::Function>::New(tpl->GetFunction());
98
99 target->Set(v8::String::NewSymbol(v8plus_js_factory_name),
100 v8::FunctionTemplate::New(
101 v8plus::ObjectWrap::cons)->GetFunction());
102 }
103 }
104
105 v8::Handle<v8::Value>
106 v8plus::ObjectWrap::_new(const v8::Arguments &args)
107 {
108 v8::HandleScope scope;
109 v8plus::ObjectWrap *op = new v8plus::ObjectWrap();
110 nvlist_t *c_excp;
111 nvlist_t *c_args;
112
113 if ((c_args = v8plus::v8_Arguments_to_nvlist(args)) == NULL)
114 return (V8PLUS_THROW_DEFAULT());
115
116 c_excp = v8plus_ctor(c_args, &op->_c_impl);
117 nvlist_free(c_args);
118 if (op->_c_impl == NULL) {
119 if (c_excp == NULL) {
120 return (V8PLUS_THROW_DEFAULT());
121 } else {
122 return (V8PLUS_THROW_DECORATED(c_excp));
123 }
124 }
125
126 _objhash.insert(std::make_pair(op->_c_impl, op));
127 op->Wrap(args.This());
128
129 return (args.This());
130 }
131
132 v8plus::ObjectWrap::~ObjectWrap()
133 {
134 v8plus_dtor(_c_impl);
135 (void) _objhash.erase(_c_impl);
136 }
137
138 v8::Handle<v8::Value>
139 v8plus::ObjectWrap::cons(const v8::Arguments &args)
140 {
141 v8::HandleScope scope;
142 const unsigned argc = 1;
143 v8::Handle<v8::Value> argv[argc] = { args[0] };
144 v8::Local<v8::Object> instance = _constructor->NewInstance(argc, argv);
145
146 return (scope.Close(instance));
147 }
148
149 v8plus::ObjectWrap *
150 v8plus::ObjectWrap::objlookup(const void *cop)
151 {
152 std::unordered_map<void *, v8plus::ObjectWrap *>::iterator it;
153
154 if ((it = _objhash.find(const_cast<void *>(cop))) == _objhash.end())
155 v8plus_panic("unable to find C++ wrapper for %p\n", cop);
156
157 return (it->second);
158 }
159
160 /*
161 * This is the entry point for all methods. We will start by demultiplexing
162 * out the C method from the function name by which we were called. There is
163 * probably some mechanism by which overly clever JavaScript code could make
164 * this not match the actual name; this will kill your Node process, so don't
165 * get cute.
166 */
167 v8::Handle<v8::Value>
168 v8plus::ObjectWrap::_entry(const v8::Arguments &args)
169 {
170 v8::HandleScope scope;
171 v8plus::ObjectWrap *op =
172 node::ObjectWrap::Unwrap<v8plus::ObjectWrap>(args.This());
173 nvlist_t *c_args;
174 nvlist_t *c_out;
175 nvlist_t *excp;
176 nvpair_t *rpp;
177 v8::Local<v8::String> self = args.Callee()->GetName()->ToString();
178 v8::String::Utf8Value selfsv(self);
179 const char *fn = *selfsv;
180 const v8plus_method_descr_t *mdp;
181 v8plus_c_method_f c_method = NULL;
182 uint_t i;
183
184 for (i = 0; i < v8plus_method_count; i++) {
185 mdp = &_mtbl[i];
186 if (strcmp(mdp->md_name, fn) == 0) {
187 c_method = mdp->md_c_func;
188 break;
189 }
190 }
191
192 if (c_method == NULL)
193 v8plus_panic("impossible method name %s\n", fn);
194
195 if ((c_args = v8plus::v8_Arguments_to_nvlist(args)) == NULL)
196 return (V8PLUS_THROW_DEFAULT());
197
198 c_out = c_method(op->_c_impl, c_args);
199 nvlist_free(c_args);
200
201 if (c_out == NULL) {
202 if (_v8plus_errno == V8PLUSERR_NOERROR)
203 return (scope.Close(v8::Undefined()));
204 else
205 return (V8PLUS_THROW_DEFAULT());
206 } else {
207 if (nvlist_lookup_nvlist(c_out, "err", &excp) == 0) {
208 v8::Handle<v8::Value> x = V8PLUS_THROW_DECORATED(excp);
209 nvlist_free(c_out);
210 return (x);
211 } else if (nvlist_lookup_nvpair(c_out, "res", &rpp) == 0) {
212 v8::Handle<v8::Value> r =
213 v8plus::nvpair_to_v8_Value(rpp);
214 nvlist_free(c_out);
215 return (scope.Close(r));
216 } else {
217 v8plus_panic("bad encoded object in return");
218 }
219 }
220
221 /*NOTREACHED*/
222 return (v8::Undefined());
223 }
224
225 v8::Handle<v8::Value>
226 v8plus::ObjectWrap::_static_entry(const v8::Arguments &args)
227 {
228 v8::HandleScope scope;
229 nvlist_t *c_args;
230 nvlist_t *c_out;
231 nvlist_t *excp;
232 nvpair_t *rpp;
233 v8::Local<v8::String> self = args.Callee()->GetName()->ToString();
234 v8::String::Utf8Value selfsv(self);
235 const char *fn = *selfsv;
236 const v8plus_static_descr_t *sdp;
237 v8plus_c_static_f c_static = NULL;
238 uint_t i;
239
240 for (i = 0; i < v8plus_static_method_count; i++) {
241 sdp = &_stbl[i];
242 if (strcmp(sdp->sd_name, fn) == 0) {
243 c_static = sdp->sd_c_func;
244 break;
245 }
246 }
247
248 if (c_static == NULL)
249 v8plus_panic("impossible static method name %s\n", fn);
250
251 if ((c_args = v8plus::v8_Arguments_to_nvlist(args)) == NULL)
252 return (V8PLUS_THROW_DEFAULT());
253
254 c_out = c_static(c_args);
255 nvlist_free(c_args);
256
257 if (c_out == NULL) {
258 if (_v8plus_errno == V8PLUSERR_NOERROR)
259 return (scope.Close(v8::Undefined()));
260 else
261 return (V8PLUS_THROW_DEFAULT());
262 } else {
263 if (nvlist_lookup_nvlist(c_out, "err", &excp) == 0) {
264 v8::Handle<v8::Value> x = V8PLUS_THROW_DECORATED(excp);
265 nvlist_free(c_out);
266 return (x);
267 } else if (nvlist_lookup_nvpair(c_out, "res", &rpp) == 0) {
268 v8::Handle<v8::Value> r =
269 v8plus::nvpair_to_v8_Value(rpp);
270 nvlist_free(c_out);
271 return (scope.Close(r));
272 } else {
273 v8plus_panic("bad encoded object in return");
274 }
275 }
276
277 /*NOTREACHED*/
278 return (v8::Undefined());
279 }
280
281 v8::Handle<v8::Value>
282 v8plus::ObjectWrap::call(const char *name,
283 int argc, v8::Handle<v8::Value> argv[])
284 {
285 v8::Handle<v8::Value> v = v8::Undefined();
286 v8::Local<v8::Value> f = handle_->Get(v8::String::NewSymbol(name));
287
288 /*
289 * XXX - we'd like to throw here, but for some reason our TryCatch
290 * block doesn't seem to handle the exception.
291 */
292 if (!f->IsFunction())
293 return (v8::Undefined());
294
295 #ifdef NODE_MAKECALLBACK_RETURN
296 v =
297 #endif
298 node::MakeCallback(handle_, name, argc, argv);
299
300 return (v);
301 }
302
303 void
304 v8plus::ObjectWrap::public_Ref(void)
305 {
306 this->Ref();
307 }
308
309 void
310 v8plus::ObjectWrap::public_Unref(void)
311 {
312 this->Unref();
313 }
314
315 extern "C" void
316 init(v8::Handle<v8::Object> target)
317 {
318 v8plus::ObjectWrap::init(target);
319 }