Jack2  1.9.9
JackPosixProcessSync.cpp
1  /*
2 Copyright (C) 2004-2008 Grame
3 
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU Lesser General Public License as published by
6 the Free Software Foundation; either version 2.1 of the License, or
7 (at your option) any later version.
8 
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU Lesser General Public License for more details.
13 
14 You should have received a copy of the GNU Lesser General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 
18 */
19 
20 #include "JackPosixProcessSync.h"
21 #include "JackError.h"
22 
23 namespace Jack
24 {
25 
26 void JackPosixProcessSync::Signal()
27 {
28  int res = pthread_cond_signal(&fCond);
29  if (res != 0) {
30  jack_error("JackPosixProcessSync::Signal error err = %s", strerror(res));
31  }
32 }
33 
34 // TO DO : check thread consistency?
35 void JackPosixProcessSync::LockedSignal()
36 {
37  int res = pthread_mutex_lock(&fMutex);
38  if (res != 0) {
39  jack_error("JackPosixProcessSync::LockedSignal error err = %s", strerror(res));
40  }
41  res = pthread_cond_signal(&fCond);
42  if (res != 0) {
43  jack_error("JackPosixProcessSync::LockedSignal error err = %s", strerror(res));
44  }
45  res = pthread_mutex_unlock(&fMutex);
46  if (res != 0) {
47  jack_error("JackPosixProcessSync::LockedSignal error err = %s", strerror(res));
48  }
49 }
50 
51 void JackPosixProcessSync::SignalAll()
52 {
53  int res = pthread_cond_broadcast(&fCond);
54  if (res != 0) {
55  jack_error("JackPosixProcessSync::SignalAll error err = %s", strerror(res));
56  }
57 }
58 
59 // TO DO : check thread consistency?
60 void JackPosixProcessSync::LockedSignalAll()
61 {
62  int res = pthread_mutex_lock(&fMutex);
63  if (res != 0) {
64  jack_error("JackPosixProcessSync::LockedSignalAll error err = %s", strerror(res));
65  }
66  res = pthread_cond_broadcast(&fCond);
67  if (res != 0) {
68  jack_error("JackPosixProcessSync::LockedSignalAll error err = %s", strerror(res));
69  }
70  res = pthread_mutex_unlock(&fMutex);
71  if (res != 0) {
72  jack_error("JackPosixProcessSync::LockedSignalAll error err = %s", strerror(res));
73  }
74 }
75 
76 void JackPosixProcessSync::Wait()
77 {
78  ThrowIf(!pthread_equal(pthread_self(), fOwner), JackException("JackPosixProcessSync::Wait: a thread has to have locked a mutex before it can wait"));
79  fOwner = 0;
80 
81  int res = pthread_cond_wait(&fCond, &fMutex);
82  if (res != 0) {
83  jack_error("JackPosixProcessSync::Wait error err = %s", strerror(res));
84  } else {
85  fOwner = pthread_self();
86  }
87 }
88 
89 // TO DO : check thread consistency?
90 void JackPosixProcessSync::LockedWait()
91 {
92  int res;
93  res = pthread_mutex_lock(&fMutex);
94  if (res != 0) {
95  jack_error("JackPosixProcessSync::LockedWait error err = %s", strerror(res));
96  }
97  if ((res = pthread_cond_wait(&fCond, &fMutex)) != 0) {
98  jack_error("JackPosixProcessSync::LockedWait error err = %s", strerror(res));
99  }
100  res = pthread_mutex_unlock(&fMutex);
101  if (res != 0) {
102  jack_error("JackPosixProcessSync::LockedWait error err = %s", strerror(res));
103  }
104 }
105 
106 bool JackPosixProcessSync::TimedWait(long usec)
107 {
108  ThrowIf(!pthread_equal(pthread_self(), fOwner), JackException("JackPosixProcessSync::TimedWait: a thread has to have locked a mutex before it can wait"));
109  fOwner = 0;
110 
111  struct timeval T0, T1;
112  timespec time;
113  struct timeval now;
114  int res;
115 
116  jack_log("JackPosixProcessSync::TimedWait time out = %ld", usec);
117  gettimeofday(&T0, 0);
118 
119  gettimeofday(&now, 0);
120  unsigned int next_date_usec = now.tv_usec + usec;
121  time.tv_sec = now.tv_sec + (next_date_usec / 1000000);
122  time.tv_nsec = (next_date_usec % 1000000) * 1000;
123 
124  res = pthread_cond_timedwait(&fCond, &fMutex, &time);
125  if (res != 0) {
126  jack_error("JackPosixProcessSync::TimedWait error usec = %ld err = %s", usec, strerror(res));
127  } else {
128  fOwner = pthread_self();
129  }
130 
131  gettimeofday(&T1, 0);
132  jack_log("JackPosixProcessSync::TimedWait finished delta = %5.1lf",
133  (1e6 * T1.tv_sec - 1e6 * T0.tv_sec + T1.tv_usec - T0.tv_usec));
134 
135  return (res == 0);
136 }
137 
138 // TO DO : check thread consistency?
139 bool JackPosixProcessSync::LockedTimedWait(long usec)
140 {
141  struct timeval T0, T1;
142  timespec time;
143  struct timeval now;
144  int res1, res2;
145 
146  res1 = pthread_mutex_lock(&fMutex);
147  if (res1 != 0) {
148  jack_error("JackPosixProcessSync::LockedTimedWait error err = %s", usec, strerror(res1));
149  }
150 
151  jack_log("JackPosixProcessSync::TimedWait time out = %ld", usec);
152  gettimeofday(&T0, 0);
153 
154  gettimeofday(&now, 0);
155  unsigned int next_date_usec = now.tv_usec + usec;
156  time.tv_sec = now.tv_sec + (next_date_usec / 1000000);
157  time.tv_nsec = (next_date_usec % 1000000) * 1000;
158  res2 = pthread_cond_timedwait(&fCond, &fMutex, &time);
159  if (res2 != 0) {
160  jack_error("JackPosixProcessSync::LockedTimedWait error usec = %ld err = %s", usec, strerror(res2));
161  }
162 
163  gettimeofday(&T1, 0);
164  res1 = pthread_mutex_unlock(&fMutex);
165  if (res1 != 0) {
166  jack_error("JackPosixProcessSync::LockedTimedWait error err = %s", usec, strerror(res1));
167  }
168 
169  jack_log("JackPosixProcessSync::TimedWait finished delta = %5.1lf",
170  (1e6 * T1.tv_sec - 1e6 * T0.tv_sec + T1.tv_usec - T0.tv_usec));
171 
172  return (res2 == 0);
173 }
174 
175 
176 } // end of namespace
177 
SERVER_EXPORT void jack_error(const char *fmt,...)
Definition: JackError.cpp:91
SERVER_EXPORT void jack_log(const char *fmt,...)
Definition: JackError.cpp:107