src/gba/gba-thread.c (view raw)
1#include "gba-thread.h"
2
3#include "arm.h"
4#include "debugger.h"
5#include "gba.h"
6
7#include <stdlib.h>
8#include <signal.h>
9
10static pthread_key_t contextKey;
11
12static void _createTLS(void) {
13 pthread_key_create(&contextKey, 0);
14}
15
16static void* _GBAThreadRun(void* context) {
17 static pthread_once_t once = PTHREAD_ONCE_INIT;
18 pthread_once(&once, _createTLS);
19
20#ifdef USE_DEBUGGER
21 struct ARMDebugger debugger;
22#endif
23 struct GBA gba;
24 struct GBAThread* threadContext = context;
25 char* savedata = 0;
26
27 sigset_t signals;
28 sigfillset(&signals);
29 pthread_sigmask(SIG_UNBLOCK, &signals, 0);
30
31 GBAInit(&gba);
32 threadContext->gba = &gba;
33 gba.sync = &threadContext->sync;
34 pthread_setspecific(contextKey, threadContext);
35 if (threadContext->renderer) {
36 GBAVideoAssociateRenderer(&gba.video, threadContext->renderer);
37 }
38
39 if (threadContext->fd >= 0) {
40 if (threadContext->fname) {
41 char* dotPoint = strrchr(threadContext->fname, '.');
42 if (dotPoint > strrchr(threadContext->fname, '/') && dotPoint[1] && dotPoint[2] && dotPoint[3]) {
43 savedata = strdup(threadContext->fname);
44 dotPoint = strrchr(savedata, '.');
45 dotPoint[1] = 's';
46 dotPoint[2] = 'a';
47 dotPoint[3] = 'v';
48 dotPoint[4] = '\0';
49 } else if (dotPoint) {
50 savedata = malloc((dotPoint - threadContext->fname + 5) * sizeof(char));
51 strncpy(savedata, threadContext->fname, dotPoint - threadContext->fname + 1);
52 strcat(savedata, "sav");
53 } else {
54 savedata = malloc(strlen(threadContext->fname + 5));
55 strcpy(savedata, threadContext->fname);
56 strcat(savedata, "sav");
57 }
58 }
59 GBALoadROM(&gba, threadContext->fd, threadContext->fname);
60 gba.savefile = savedata;
61 }
62
63#ifdef USE_DEBUGGER
64 if (threadContext->useDebugger) {
65 threadContext->debugger = &debugger;
66 GBAAttachDebugger(&gba, &debugger);
67 } else {
68 threadContext->debugger = 0;
69 }
70#else
71 threadContext->debugger = 0;
72#endif
73
74 gba.keySource = &threadContext->activeKeys;
75
76 if (threadContext->startCallback) {
77 threadContext->startCallback(threadContext);
78 }
79
80 pthread_mutex_lock(&threadContext->stateMutex);
81 threadContext->state = THREAD_RUNNING;
82 pthread_cond_broadcast(&threadContext->stateCond);
83 pthread_mutex_unlock(&threadContext->stateMutex);
84
85 while (threadContext->state < THREAD_EXITING) {
86#ifdef USE_DEBUGGER
87 if (threadContext->useDebugger) {
88 ARMDebuggerRun(&debugger);
89 if (debugger.state == DEBUGGER_SHUTDOWN) {
90 pthread_mutex_lock(&threadContext->stateMutex);
91 threadContext->state = THREAD_EXITING;
92 pthread_mutex_unlock(&threadContext->stateMutex);
93 }
94 } else {
95#endif
96 while (threadContext->state == THREAD_RUNNING) {
97 ARMRun(&gba.cpu);
98 }
99#ifdef USE_DEBUGGER
100 }
101#endif
102 while (threadContext->state == THREAD_PAUSED) {
103 pthread_mutex_lock(&threadContext->stateMutex);
104 pthread_cond_wait(&threadContext->stateCond, &threadContext->stateMutex);
105 pthread_mutex_unlock(&threadContext->stateMutex);
106 }
107 }
108
109 while (threadContext->state != THREAD_SHUTDOWN) {
110 pthread_mutex_lock(&threadContext->stateMutex);
111 threadContext->state = THREAD_SHUTDOWN;
112 pthread_mutex_unlock(&threadContext->stateMutex);
113 }
114
115 if (threadContext->cleanCallback) {
116 threadContext->cleanCallback(threadContext);
117 }
118
119 GBADeinit(&gba);
120
121 pthread_cond_broadcast(&threadContext->sync.videoFrameAvailableCond);
122 pthread_cond_broadcast(&threadContext->sync.audioRequiredCond);
123 free(savedata);
124
125 return 0;
126}
127
128int GBAThreadStart(struct GBAThread* threadContext) {
129 // TODO: error check
130 pthread_mutex_init(&threadContext->stateMutex, 0);
131 pthread_cond_init(&threadContext->stateCond, 0);
132
133 pthread_mutex_init(&threadContext->sync.videoFrameMutex, 0);
134 pthread_cond_init(&threadContext->sync.videoFrameAvailableCond, 0);
135 pthread_cond_init(&threadContext->sync.videoFrameRequiredCond, 0);
136 pthread_cond_init(&threadContext->sync.audioRequiredCond, 0);
137
138 pthread_mutex_lock(&threadContext->stateMutex);
139 threadContext->activeKeys = 0;
140 threadContext->state = THREAD_INITIALIZED;
141 threadContext->sync.videoFrameOn = 1;
142 pthread_create(&threadContext->thread, 0, _GBAThreadRun, threadContext);
143 pthread_cond_wait(&threadContext->stateCond, &threadContext->stateMutex);
144 pthread_mutex_unlock(&threadContext->stateMutex);
145
146 return 0;
147}
148
149void GBAThreadJoin(struct GBAThread* threadContext) {
150 pthread_mutex_lock(&threadContext->sync.videoFrameMutex);
151 threadContext->sync.videoFrameWait = 0;
152 pthread_cond_broadcast(&threadContext->sync.videoFrameRequiredCond);
153 pthread_mutex_unlock(&threadContext->sync.videoFrameMutex);
154
155 pthread_join(threadContext->thread, 0);
156
157 pthread_mutex_destroy(&threadContext->stateMutex);
158 pthread_cond_destroy(&threadContext->stateCond);
159
160 pthread_mutex_destroy(&threadContext->sync.videoFrameMutex);
161 pthread_cond_broadcast(&threadContext->sync.videoFrameAvailableCond);
162 pthread_cond_destroy(&threadContext->sync.videoFrameAvailableCond);
163 pthread_cond_broadcast(&threadContext->sync.videoFrameRequiredCond);
164 pthread_cond_destroy(&threadContext->sync.videoFrameRequiredCond);
165
166 pthread_cond_broadcast(&threadContext->sync.audioRequiredCond);
167 pthread_cond_destroy(&threadContext->sync.audioRequiredCond);
168}
169
170void GBAThreadPause(struct GBAThread* threadContext) {
171 int frameOn = 1;
172 pthread_mutex_lock(&threadContext->stateMutex);
173 if (threadContext->state == THREAD_RUNNING) {
174 if (threadContext->debugger && threadContext->debugger->state == DEBUGGER_RUNNING) {
175 threadContext->debugger->state = DEBUGGER_EXITING;
176 }
177 threadContext->state = THREAD_PAUSED;
178 frameOn = 0;
179 }
180 pthread_mutex_unlock(&threadContext->stateMutex);
181 pthread_mutex_lock(&threadContext->sync.videoFrameMutex);
182 if (frameOn != threadContext->sync.videoFrameOn) {
183 threadContext->sync.videoFrameOn = frameOn;
184 pthread_cond_broadcast(&threadContext->sync.videoFrameAvailableCond);
185 }
186 pthread_mutex_unlock(&threadContext->sync.videoFrameMutex);
187}
188
189void GBAThreadUnpause(struct GBAThread* threadContext) {
190 int frameOn = 1;
191 pthread_mutex_lock(&threadContext->stateMutex);
192 if (threadContext->state == THREAD_PAUSED) {
193 threadContext->state = THREAD_RUNNING;
194 pthread_cond_broadcast(&threadContext->stateCond);
195 }
196 pthread_mutex_unlock(&threadContext->stateMutex);
197 pthread_mutex_lock(&threadContext->sync.videoFrameMutex);
198 if (frameOn != threadContext->sync.videoFrameOn) {
199 threadContext->sync.videoFrameOn = frameOn;
200 pthread_cond_broadcast(&threadContext->sync.videoFrameAvailableCond);
201 }
202 pthread_mutex_unlock(&threadContext->sync.videoFrameMutex);
203}
204
205void GBAThreadTogglePause(struct GBAThread* threadContext) {
206 int frameOn = 1;
207 pthread_mutex_lock(&threadContext->stateMutex);
208 if (threadContext->state == THREAD_PAUSED) {
209 threadContext->state = THREAD_RUNNING;
210 pthread_cond_broadcast(&threadContext->stateCond);
211 } else if (threadContext->state == THREAD_RUNNING) {
212 if (threadContext->debugger && threadContext->debugger->state == DEBUGGER_RUNNING) {
213 threadContext->debugger->state = DEBUGGER_EXITING;
214 }
215 threadContext->state = THREAD_PAUSED;
216 frameOn = 0;
217 }
218 pthread_mutex_unlock(&threadContext->stateMutex);
219 pthread_mutex_lock(&threadContext->sync.videoFrameMutex);
220 if (frameOn != threadContext->sync.videoFrameOn) {
221 threadContext->sync.videoFrameOn = frameOn;
222 pthread_cond_broadcast(&threadContext->sync.videoFrameAvailableCond);
223 }
224 pthread_mutex_unlock(&threadContext->sync.videoFrameMutex);
225}
226
227struct GBAThread* GBAThreadGetContext(void) {
228 return pthread_getspecific(contextKey);
229}
230
231void GBASyncPostFrame(struct GBASync* sync) {
232 if (!sync) {
233 return;
234 }
235
236 pthread_mutex_lock(&sync->videoFrameMutex);
237 ++sync->videoFramePending;
238 --sync->videoFrameSkip;
239 if (sync->videoFrameSkip < 0) {
240 pthread_cond_broadcast(&sync->videoFrameAvailableCond);
241 if (sync->videoFrameWait) {
242 pthread_cond_wait(&sync->videoFrameRequiredCond, &sync->videoFrameMutex);
243 }
244 }
245 pthread_mutex_unlock(&sync->videoFrameMutex);
246}
247
248int GBASyncWaitFrameStart(struct GBASync* sync, int frameskip) {
249 if (!sync) {
250 return 1;
251 }
252
253 pthread_mutex_lock(&sync->videoFrameMutex);
254 pthread_cond_broadcast(&sync->videoFrameRequiredCond);
255 if (!sync->videoFrameOn) {
256 return 0;
257 }
258 pthread_cond_wait(&sync->videoFrameAvailableCond, &sync->videoFrameMutex);
259 sync->videoFramePending = 0;
260 sync->videoFrameSkip = frameskip;
261 return 1;
262}
263
264void GBASyncWaitFrameEnd(struct GBASync* sync) {
265 if (!sync) {
266 return;
267 }
268
269 pthread_mutex_unlock(&sync->videoFrameMutex);
270}
271
272int GBASyncDrawingFrame(struct GBASync* sync) {
273 return sync->videoFrameSkip <= 0;
274}
275
276void GBASyncProduceAudio(struct GBASync* sync, pthread_mutex_t* mutex) {
277 if (&sync->audioWait) {
278 pthread_cond_wait(&sync->audioRequiredCond, mutex);
279 }
280}
281
282void GBASyncConsumeAudio(struct GBASync* sync) {
283 pthread_cond_broadcast(&sync->audioRequiredCond);
284}