1
2 /*
3 * Copyright 2006 The Android Open Source Project
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8
9
10 #include "SkEvent.h"
11
initialize(const char * type,size_t typeLen,SkEventSinkID targetID)12 void SkEvent::initialize(const char* type, size_t typeLen,
13 SkEventSinkID targetID) {
14 fType = NULL;
15 setType(type, typeLen);
16 f32 = 0;
17 fTargetID = targetID;
18 fTargetProc = NULL;
19 #ifdef SK_DEBUG
20 fTime = 0;
21 fNextEvent = NULL;
22 #endif
23 }
24
SkEvent()25 SkEvent::SkEvent()
26 {
27 initialize("", 0, 0);
28 }
29
SkEvent(const SkEvent & src)30 SkEvent::SkEvent(const SkEvent& src)
31 {
32 *this = src;
33 if (((size_t) fType & 1) == 0)
34 setType(src.fType);
35 }
36
SkEvent(const SkString & type,SkEventSinkID targetID)37 SkEvent::SkEvent(const SkString& type, SkEventSinkID targetID)
38 {
39 initialize(type.c_str(), type.size(), targetID);
40 }
41
SkEvent(const char type[],SkEventSinkID targetID)42 SkEvent::SkEvent(const char type[], SkEventSinkID targetID)
43 {
44 SkASSERT(type);
45 initialize(type, strlen(type), targetID);
46 }
47
~SkEvent()48 SkEvent::~SkEvent()
49 {
50 if (((size_t) fType & 1) == 0)
51 sk_free((void*) fType);
52 }
53
makeCharArray(char * buffer,size_t compact)54 static size_t makeCharArray(char* buffer, size_t compact)
55 {
56 size_t bits = (size_t) compact >> 1;
57 memcpy(buffer, &bits, sizeof(compact));
58 buffer[sizeof(compact)] = 0;
59 return strlen(buffer);
60 }
61
getType(SkString * str) const62 void SkEvent::getType(SkString* str) const
63 {
64 if (str)
65 {
66 if ((size_t) fType & 1) // not a pointer
67 {
68 char chars[sizeof(size_t) + 1];
69 size_t len = makeCharArray(chars, (size_t) fType);
70 str->set(chars, len);
71 }
72 else
73 str->set(fType);
74 }
75 }
76
isType(const SkString & str) const77 bool SkEvent::isType(const SkString& str) const
78 {
79 return this->isType(str.c_str(), str.size());
80 }
81
isType(const char type[],size_t typeLen) const82 bool SkEvent::isType(const char type[], size_t typeLen) const
83 {
84 if (typeLen == 0)
85 typeLen = strlen(type);
86 if ((size_t) fType & 1) { // not a pointer
87 char chars[sizeof(size_t) + 1];
88 size_t len = makeCharArray(chars, (size_t) fType);
89 return len == typeLen && strncmp(chars, type, typeLen) == 0;
90 }
91 return strncmp(fType, type, typeLen) == 0 && fType[typeLen] == 0;
92 }
93
setType(const char type[],size_t typeLen)94 void SkEvent::setType(const char type[], size_t typeLen)
95 {
96 if (typeLen == 0)
97 typeLen = strlen(type);
98 if (typeLen <= sizeof(fType)) {
99 size_t slot = 0;
100 memcpy(&slot, type, typeLen);
101 if (slot << 1 >> 1 != slot)
102 goto useCharStar;
103 slot <<= 1;
104 slot |= 1;
105 fType = (char*) slot;
106 } else {
107 useCharStar:
108 fType = (char*) sk_malloc_throw(typeLen + 1);
109 SkASSERT(((size_t) fType & 1) == 0);
110 memcpy(fType, type, typeLen);
111 fType[typeLen] = 0;
112 }
113 }
114
setType(const SkString & type)115 void SkEvent::setType(const SkString& type)
116 {
117 setType(type.c_str());
118 }
119
120 ////////////////////////////////////////////////////////////////////////////
121
122 #include "SkParse.h"
123
inflate(const SkDOM & dom,const SkDOM::Node * node)124 void SkEvent::inflate(const SkDOM& dom, const SkDOM::Node* node)
125 {
126 const char* name = dom.findAttr(node, "type");
127 if (name)
128 this->setType(name);
129
130 const char* value;
131 if ((value = dom.findAttr(node, "fast32")) != NULL)
132 {
133 int32_t n;
134 if (SkParse::FindS32(value, &n))
135 this->setFast32(n);
136 }
137
138 for (node = dom.getFirstChild(node); node; node = dom.getNextSibling(node))
139 {
140 if (strcmp(dom.getName(node), "data"))
141 {
142 SkDEBUGCODE(SkDebugf("SkEvent::inflate unrecognized subelement <%s>\n", dom.getName(node));)
143 continue;
144 }
145
146 name = dom.findAttr(node, "name");
147 if (name == NULL)
148 {
149 SkDEBUGCODE(SkDebugf("SkEvent::inflate missing required \"name\" attribute in <data> subelement\n");)
150 continue;
151 }
152
153 if ((value = dom.findAttr(node, "s32")) != NULL)
154 {
155 int32_t n;
156 if (SkParse::FindS32(value, &n))
157 this->setS32(name, n);
158 }
159 else if ((value = dom.findAttr(node, "scalar")) != NULL)
160 {
161 SkScalar x;
162 if (SkParse::FindScalar(value, &x))
163 this->setScalar(name, x);
164 }
165 else if ((value = dom.findAttr(node, "string")) != NULL)
166 this->setString(name, value);
167 #ifdef SK_DEBUG
168 else
169 {
170 SkDebugf("SkEvent::inflate <data name=\"%s\"> subelement missing required type attribute [S32 | scalar | string]\n", name);
171 }
172 #endif
173 }
174 }
175
176 #ifdef SK_DEBUG
177
178 #ifndef SkScalarToFloat
179 #define SkScalarToFloat(x) ((x) / 65536.f)
180 #endif
181
dump(const char title[])182 void SkEvent::dump(const char title[])
183 {
184 if (title)
185 SkDebugf("%s ", title);
186
187 SkString etype;
188 this->getType(&etype);
189 SkDebugf("event<%s> fast32=%d", etype.c_str(), this->getFast32());
190
191 const SkMetaData& md = this->getMetaData();
192 SkMetaData::Iter iter(md);
193 SkMetaData::Type mtype;
194 int count;
195 const char* name;
196
197 while ((name = iter.next(&mtype, &count)) != NULL)
198 {
199 SkASSERT(count > 0);
200
201 SkDebugf(" <%s>=", name);
202 switch (mtype) {
203 case SkMetaData::kS32_Type: // vector version???
204 {
205 int32_t value;
206 md.findS32(name, &value);
207 SkDebugf("%d ", value);
208 }
209 break;
210 case SkMetaData::kScalar_Type:
211 {
212 const SkScalar* values = md.findScalars(name, &count, NULL);
213 SkDebugf("%f", SkScalarToFloat(values[0]));
214 for (int i = 1; i < count; i++)
215 SkDebugf(", %f", SkScalarToFloat(values[i]));
216 SkDebugf(" ");
217 }
218 break;
219 case SkMetaData::kString_Type:
220 {
221 const char* value = md.findString(name);
222 SkASSERT(value);
223 SkDebugf("<%s> ", value);
224 }
225 break;
226 case SkMetaData::kPtr_Type: // vector version???
227 {
228 void* value;
229 md.findPtr(name, &value);
230 SkDebugf("%p ", value);
231 }
232 break;
233 case SkMetaData::kBool_Type: // vector version???
234 {
235 bool value;
236 md.findBool(name, &value);
237 SkDebugf("%s ", value ? "true" : "false");
238 }
239 break;
240 default:
241 SkDEBUGFAIL("unknown metadata type returned from iterator");
242 break;
243 }
244 }
245 SkDebugf("\n");
246 }
247 #endif
248
249 ///////////////////////////////////////////////////////////////////////////////////////
250
251 #ifdef SK_DEBUG
252 // #define SK_TRACE_EVENTSx
253 #endif
254
255 #ifdef SK_TRACE_EVENTS
event_log(const char s[])256 static void event_log(const char s[])
257 {
258 SkDEBUGF(("%s\n", s));
259 }
260
261 #define EVENT_LOG(s) event_log(s)
262 #define EVENT_LOGN(s, n) do { SkString str(s); str.append(" "); str.appendS32(n); event_log(str.c_str()); } while (0)
263 #else
264 #define EVENT_LOG(s)
265 #define EVENT_LOGN(s, n)
266 #endif
267
268 #include "SkThread.h"
269 #include "SkTime.h"
270
271 class SkEvent_Globals {
272 public:
SkEvent_Globals()273 SkEvent_Globals() {
274 fEventQHead = NULL;
275 fEventQTail = NULL;
276 fDelayQHead = NULL;
277 SkDEBUGCODE(fEventCounter = 0;)
278 }
279
280 SkMutex fEventMutex;
281 SkEvent* fEventQHead, *fEventQTail;
282 SkEvent* fDelayQHead;
283 SkDEBUGCODE(int fEventCounter;)
284 };
285
getGlobals()286 static SkEvent_Globals& getGlobals() {
287 // leak this, so we don't incure any shutdown perf hit
288 static SkEvent_Globals* gGlobals = new SkEvent_Globals;
289 return *gGlobals;
290 }
291
292 ///////////////////////////////////////////////////////////////////////////////
293
postDelay(SkMSec delay)294 void SkEvent::postDelay(SkMSec delay) {
295 if (!fTargetID && !fTargetProc) {
296 delete this;
297 return;
298 }
299
300 if (delay) {
301 this->postTime(SkTime::GetMSecs() + delay);
302 return;
303 }
304
305 SkEvent_Globals& globals = getGlobals();
306
307 globals.fEventMutex.acquire();
308 bool wasEmpty = SkEvent::Enqueue(this);
309 globals.fEventMutex.release();
310
311 // call outside of us holding the mutex
312 if (wasEmpty) {
313 SkEvent::SignalNonEmptyQueue();
314 }
315 }
316
postTime(SkMSec time)317 void SkEvent::postTime(SkMSec time) {
318 if (!fTargetID && !fTargetProc) {
319 delete this;
320 return;
321 }
322
323 SkEvent_Globals& globals = getGlobals();
324
325 globals.fEventMutex.acquire();
326 SkMSec queueDelay = SkEvent::EnqueueTime(this, time);
327 globals.fEventMutex.release();
328
329 // call outside of us holding the mutex
330 if ((int32_t)queueDelay != ~0) {
331 SkEvent::SignalQueueTimer(queueDelay);
332 }
333 }
334
Enqueue(SkEvent * evt)335 bool SkEvent::Enqueue(SkEvent* evt) {
336 SkEvent_Globals& globals = getGlobals();
337 // gEventMutex acquired by caller
338
339 SkASSERT(evt);
340
341 bool wasEmpty = globals.fEventQHead == NULL;
342
343 if (globals.fEventQTail)
344 globals.fEventQTail->fNextEvent = evt;
345 globals.fEventQTail = evt;
346 if (globals.fEventQHead == NULL)
347 globals.fEventQHead = evt;
348 evt->fNextEvent = NULL;
349
350 SkDEBUGCODE(++globals.fEventCounter);
351
352 return wasEmpty;
353 }
354
Dequeue()355 SkEvent* SkEvent::Dequeue() {
356 SkEvent_Globals& globals = getGlobals();
357 globals.fEventMutex.acquire();
358
359 SkEvent* evt = globals.fEventQHead;
360 if (evt) {
361 SkDEBUGCODE(--globals.fEventCounter);
362
363 globals.fEventQHead = evt->fNextEvent;
364 if (globals.fEventQHead == NULL) {
365 globals.fEventQTail = NULL;
366 }
367 }
368 globals.fEventMutex.release();
369
370 return evt;
371 }
372
QHasEvents()373 bool SkEvent::QHasEvents() {
374 SkEvent_Globals& globals = getGlobals();
375
376 // this is not thread accurate, need a semaphore for that
377 return globals.fEventQHead != NULL;
378 }
379
380 #ifdef SK_TRACE_EVENTS
381 static int gDelayDepth;
382 #endif
383
EnqueueTime(SkEvent * evt,SkMSec time)384 SkMSec SkEvent::EnqueueTime(SkEvent* evt, SkMSec time) {
385 SkEvent_Globals& globals = getGlobals();
386 // gEventMutex acquired by caller
387
388 SkEvent* curr = globals.fDelayQHead;
389 SkEvent* prev = NULL;
390
391 while (curr) {
392 if (SkMSec_LT(time, curr->fTime)) {
393 break;
394 }
395 prev = curr;
396 curr = curr->fNextEvent;
397 }
398
399 evt->fTime = time;
400 evt->fNextEvent = curr;
401 if (prev == NULL) {
402 globals.fDelayQHead = evt;
403 } else {
404 prev->fNextEvent = evt;
405 }
406
407 SkMSec delay = globals.fDelayQHead->fTime - SkTime::GetMSecs();
408 if ((int32_t)delay <= 0) {
409 delay = 1;
410 }
411 return delay;
412 }
413
414 ///////////////////////////////////////////////////////////////////////////////
415
416 #include "SkEventSink.h"
417
ProcessEvent()418 bool SkEvent::ProcessEvent() {
419 SkEvent* evt = SkEvent::Dequeue();
420 SkAutoTDelete<SkEvent> autoDelete(evt);
421 bool again = false;
422
423 EVENT_LOGN("ProcessEvent", (int32_t)evt);
424
425 if (evt) {
426 (void)SkEventSink::DoEvent(*evt);
427 again = SkEvent::QHasEvents();
428 }
429 return again;
430 }
431
ServiceQueueTimer()432 void SkEvent::ServiceQueueTimer()
433 {
434 SkEvent_Globals& globals = getGlobals();
435
436 globals.fEventMutex.acquire();
437
438 bool wasEmpty = false;
439 SkMSec now = SkTime::GetMSecs();
440 SkEvent* evt = globals.fDelayQHead;
441
442 while (evt)
443 {
444 if (SkMSec_LT(now, evt->fTime))
445 break;
446
447 #ifdef SK_TRACE_EVENTS
448 --gDelayDepth;
449 SkDebugf("dequeue-delay %s (%d)", evt->getType(), gDelayDepth);
450 const char* idStr = evt->findString("id");
451 if (idStr)
452 SkDebugf(" (%s)", idStr);
453 SkDebugf("\n");
454 #endif
455
456 SkEvent* next = evt->fNextEvent;
457 if (SkEvent::Enqueue(evt))
458 wasEmpty = true;
459 evt = next;
460 }
461 globals.fDelayQHead = evt;
462
463 SkMSec time = evt ? evt->fTime - now : 0;
464
465 globals.fEventMutex.release();
466
467 if (wasEmpty)
468 SkEvent::SignalNonEmptyQueue();
469
470 SkEvent::SignalQueueTimer(time);
471 }
472
CountEventsOnQueue()473 int SkEvent::CountEventsOnQueue() {
474 SkEvent_Globals& globals = getGlobals();
475 globals.fEventMutex.acquire();
476
477 int count = 0;
478 const SkEvent* evt = globals.fEventQHead;
479 while (evt) {
480 count += 1;
481 evt = evt->fNextEvent;
482 }
483 globals.fEventMutex.release();
484
485 return count;
486 }
487
488 ///////////////////////////////////////////////////////////////////////////////
489
Init()490 void SkEvent::Init() {}
491
Term()492 void SkEvent::Term() {
493 SkEvent_Globals& globals = getGlobals();
494
495 SkEvent* evt = globals.fEventQHead;
496 while (evt) {
497 SkEvent* next = evt->fNextEvent;
498 delete evt;
499 evt = next;
500 }
501
502 evt = globals.fDelayQHead;
503 while (evt) {
504 SkEvent* next = evt->fNextEvent;
505 delete evt;
506 evt = next;
507 }
508 }
509