Jack2: JackPosixThread.cpp Source File

Jack2 1.9.12

JackPosixThread.cpp
1 /*
2 Copyright (C) 2001 Paul Davis
3 Copyright (C) 2004-2008 Grame
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published by
7 the Free Software Foundation; either version 2.1 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18
19 */
20
21 #include "JackPosixThread.h"
22 #include "JackError.h"
23 #include "JackTime.h"
24 #include "JackGlobals.h"
25 #include <string.h> // for memset
26 #include <unistd.h> // for _POSIX_PRIORITY_SCHEDULING check
27
28 //#define JACK_SCHED_POLICY SCHED_RR
29 #define JACK_SCHED_POLICY SCHED_FIFO
30
31 namespace Jack
32 {
33
34 void* JackPosixThread::ThreadHandler(void* arg)
35 {
36 JackPosixThread* obj = (JackPosixThread*)arg;
37 JackRunnableInterface* runnable = obj->fRunnable;
38 int err;
39
40 if ((err = pthread_setcanceltype(obj->fCancellation, NULL)) != 0) {
41 jack_error("pthread_setcanceltype err = %s", strerror(err));
42 }
43
44 // Signal creation thread when started with StartSync
45 jack_log("JackPosixThread::ThreadHandler : start");
46 obj->fStatus = kIniting;
47
48 // Call Init method
49 if (!runnable->Init()) {
50 jack_error("Thread init fails: thread quits");
51 return 0;
52 }
53
54 obj->fStatus = kRunning;
55
56 // If Init succeed, start the thread loop
57 bool res = true;
58 while (obj->fStatus == kRunning && res) {
59 res = runnable->Execute();
60 }
61
62 jack_log("JackPosixThread::ThreadHandler : exit");
63 pthread_exit(0);
64 return 0; // never reached
65 }
66
67 int JackPosixThread::Start()
68 {
69 fStatus = kStarting;
70
71 // Check if the thread was correctly started
72 if (StartImp(&fThread, fPriority, fRealTime, ThreadHandler, this) < 0) {
73 fStatus = kIdle;
74 return -1;
75 } else {
76 return 0;
77 }
78 }
79
80 int JackPosixThread::StartSync()
81 {
82 fStatus = kStarting;
83
84 if (StartImp(&fThread, fPriority, fRealTime, ThreadHandler, this) < 0) {
85 fStatus = kIdle;
86 return -1;
87 } else {
88 int count = 0;
89 while (fStatus == kStarting && ++count < 1000) {
90 JackSleep(1000);
91 }
92 return (count == 1000) ? -1 : 0;
93 }
94 }
95
96 int JackPosixThread::StartImp(jack_native_thread_t* thread, int priority, int realtime, void*(*start_routine)(void*), void* arg)
97 {
98 pthread_attr_t attributes;
99 struct sched_param rt_param;
100 pthread_attr_init(&attributes);
101 int res;
102
103 if ((res = pthread_attr_setdetachstate(&attributes, PTHREAD_CREATE_JOINABLE))) {
104 jack_error("Cannot request joinable thread creation for thread res = %d", res);
105 return -1;
106 }
107
108 if ((res = pthread_attr_setscope(&attributes, PTHREAD_SCOPE_SYSTEM))) {
109 jack_error("Cannot set scheduling scope for thread res = %d", res);
110 return -1;
111 }
112
113 if (realtime) {
114
115 jack_log("JackPosixThread::StartImp : create RT thread");
116
117 if ((res = pthread_attr_setinheritsched(&attributes, PTHREAD_EXPLICIT_SCHED))) {
118 jack_error("Cannot request explicit scheduling for RT thread res = %d", res);
119 return -1;
120 }
121
122 if ((res = pthread_attr_setschedpolicy(&attributes, JACK_SCHED_POLICY))) {
123 jack_error("Cannot set RR scheduling class for RT thread res = %d", res);
124 return -1;
125 }
126
127 memset(&rt_param, 0, sizeof(rt_param));
128 rt_param.sched_priority = priority;
129
130 if ((res = pthread_attr_setschedparam(&attributes, &rt_param))) {
131 jack_error("Cannot set scheduling priority for RT thread res = %d", res);
132 return -1;
133 }
134
135 } else {
136 jack_log("JackPosixThread::StartImp : create non RT thread");
137 }
138
139 if ((res = pthread_attr_setstacksize(&attributes, THREAD_STACK))) {
140 jack_error("Cannot set thread stack size res = %d", res);
141 return -1;
142 }
143
144 if ((res = JackGlobals::fJackThreadCreator(thread, &attributes, start_routine, arg))) {
145 jack_error("Cannot create thread res = %d", res);
146 return -1;
147 }
148
149 pthread_attr_destroy(&attributes);
150 return 0;
151 }
152
153 int JackPosixThread::Kill()
154 {
155 if (fThread != (jack_native_thread_t)NULL) { // If thread has been started
156 jack_log("JackPosixThread::Kill");
157 void* status;
158 pthread_cancel(fThread);
159 pthread_join(fThread, &status);
160 fStatus = kIdle;
161 fThread = (jack_native_thread_t)NULL;
162 return 0;
163 } else {
164 return -1;
165 }
166 }
167
168 int JackPosixThread::Stop()
169 {
170 if (fThread != (jack_native_thread_t)NULL) { // If thread has been started
171 jack_log("JackPosixThread::Stop");
172 void* status;
173 fStatus = kIdle; // Request for the thread to stop
174 pthread_join(fThread, &status);
175 fThread = (jack_native_thread_t)NULL;
176 return 0;
177 } else {
178 return -1;
179 }
180 }
181
182 int JackPosixThread::KillImp(jack_native_thread_t thread)
183 {
184 if (thread != (jack_native_thread_t)NULL) { // If thread has been started
185 jack_log("JackPosixThread::Kill");
186 void* status;
187 pthread_cancel(thread);
188 pthread_join(thread, &status);
189 return 0;
190 } else {
191 return -1;
192 }
193 }
194
195 int JackPosixThread::StopImp(jack_native_thread_t thread)
196 {
197 if (thread != (jack_native_thread_t)NULL) { // If thread has been started
198 jack_log("JackPosixThread::Stop");
199 void* status;
200 pthread_join(thread, &status);
201 return 0;
202 } else {
203 return -1;
204 }
205 }
206
207 int JackPosixThread::AcquireRealTime()
208 {
209 return (fThread != (jack_native_thread_t)NULL) ? AcquireRealTimeImp(fThread, fPriority) : -1;
210 }
211
212 int JackPosixThread::AcquireSelfRealTime()
213 {
214 return AcquireRealTimeImp(pthread_self(), fPriority);
215 }
216
217 int JackPosixThread::AcquireRealTime(int priority)
218 {
219 fPriority = priority;
220 return AcquireRealTime();
221 }
222
223 int JackPosixThread::AcquireSelfRealTime(int priority)
224 {
225 fPriority = priority;
226 return AcquireSelfRealTime();
227 }
228 int JackPosixThread::AcquireRealTimeImp(jack_native_thread_t thread, int priority)
229 {
230 struct sched_param rtparam;
231 int res;
232 memset(&rtparam, 0, sizeof(rtparam));
233 rtparam.sched_priority = priority;
234
235 jack_log("JackPosixThread::AcquireRealTimeImp priority = %d", priority);
236
237 if ((res = pthread_setschedparam(thread, JACK_SCHED_POLICY, &rtparam)) != 0) {
238 jack_error("Cannot use real-time scheduling (RR/%d)"
239 "(%d: %s)", rtparam.sched_priority, res,
240 strerror(res));
241 return -1;
242 }
243 return 0;
244 }
245
246 int JackPosixThread::DropRealTime()
247 {
248 return (fThread != (jack_native_thread_t)NULL) ? DropRealTimeImp(fThread) : -1;
249 }
250
251 int JackPosixThread::DropSelfRealTime()
252 {
253 return DropRealTimeImp(pthread_self());
254 }
255
256 int JackPosixThread::DropRealTimeImp(jack_native_thread_t thread)
257 {
258 struct sched_param rtparam;
259 int res;
260 memset(&rtparam, 0, sizeof(rtparam));
261 rtparam.sched_priority = 0;
262
263 if ((res = pthread_setschedparam(thread, SCHED_OTHER, &rtparam)) != 0) {
264 jack_error("Cannot switch to normal scheduling priority(%s)", strerror(errno));
265 return -1;
266 }
267 return 0;
268 }
269
270 jack_native_thread_t JackPosixThread::GetThreadID()
271 {
272 return fThread;
273 }
274
275 bool JackPosixThread::IsThread()
276 {
277 return pthread_self() == fThread;
278 }
279
280 void JackPosixThread::Terminate()
281 {
282 jack_log("JackPosixThread::Terminate");
283 pthread_exit(0);
284 }
285
286 SERVER_EXPORT void ThreadExit()
287 {
288 jack_log("ThreadExit");
289 pthread_exit(0);
290 }
291
292 } // end of namespace
293
294 bool jack_get_thread_realtime_priority_range(int * min_ptr, int * max_ptr)
295 {
296 #if defined(_POSIX_PRIORITY_SCHEDULING) && !defined(__APPLE__)
297 int min, max;
298
299 min = sched_get_priority_min(JACK_SCHED_POLICY);
300 if (min == -1)
301 {
302 jack_error("sched_get_priority_min() failed.");
303 return false;
304 }
305
306 max = sched_get_priority_max(JACK_SCHED_POLICY);
307 if (max == -1)
308 {
309 jack_error("sched_get_priority_max() failed.");
310 return false;
311 }
312
313 *min_ptr = min;
314 *max_ptr = max;
315
316 return true;
317 #else
318 return false;
319 #endif
320 }
321
322 bool jack_tls_allocate_key(jack_tls_key *key_ptr)
323 {
324 int ret;
325
326 ret = pthread_key_create(key_ptr, NULL);
327 if (ret != 0)
328 {
329 jack_error("pthread_key_create() failed with error %d", ret);
330 return false;
331 }
332
333 return true;
334 }
335
336 bool jack_tls_free_key(jack_tls_key key)
337 {
338 int ret;
339
340 ret = pthread_key_delete(key);
341 if (ret != 0)
342 {
343 jack_error("pthread_key_delete() failed with error %d", ret);
344 return false;
345 }
346
347 return true;
348 }
349
350 bool jack_tls_set(jack_tls_key key, void *data_ptr)
351 {
352 int ret;
353
354 ret = pthread_setspecific(key, (const void *)data_ptr);
355 if (ret != 0)
356 {
357 jack_error("pthread_setspecific() failed with error %d", ret);
358 return false;
359 }
360
361 return true;
362 }
363
364 void *jack_tls_get(jack_tls_key key)
365 {
366 return pthread_getspecific(key);
367 }
Jack
Definition: JackAC3Encoder.cpp:30
jack_error
SERVER_EXPORT void jack_error(const char *fmt,...)
Definition: JackError.cpp:92
jack_log
SERVER_EXPORT void jack_log(const char *fmt,...)
Definition: JackError.cpp:108