70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
-
+
-
+
-
+
-
+
-
+
-
-
+
+
|
Permit();
}
return 0;
}
int
of_condition_wait(of_condition_t *condition, of_mutex_t *mutex)
of_condition_wait(of_condition_t *condition, OFPlainMutex *mutex)
{
ULONG signalMask = 0;
return of_condition_wait_or_signal(condition, mutex, &signalMask);
}
int
of_condition_wait_or_signal(of_condition_t *condition, of_mutex_t *mutex,
of_condition_wait_or_signal(of_condition_t *condition, OFPlainMutex *mutex,
ULONG *signalMask)
{
struct of_condition_waiting_task waitingTask = {
.task = FindTask(NULL),
.sigBit = AllocSignal(-1)
};
int error = 0;
ULONG mask;
if (waitingTask.sigBit == -1)
return EAGAIN;
Forbid();
if ((error = of_mutex_unlock(mutex)) != 0) {
if ((error = OFPlainMutexUnlock(mutex)) != 0) {
FreeSignal(waitingTask.sigBit);
return error;
}
waitingTask.next = condition->waitingTasks;
condition->waitingTasks = &waitingTask;
mask = Wait((1ul << waitingTask.sigBit) | *signalMask);
if (mask & (1ul << waitingTask.sigBit) || (*signalMask &= mask))
error = of_mutex_lock(mutex);
error = OFPlainMutexLock(mutex);
else
/*
* This should not happen - it means something interrupted the
* Wait(), so the best we can do is return EINTR.
*/
error = EINTR;
FreeSignal(waitingTask.sigBit);
Permit();
return error;
}
int
of_condition_timed_wait(of_condition_t *condition, of_mutex_t *mutex,
of_condition_timed_wait(of_condition_t *condition, OFPlainMutex *mutex,
OFTimeInterval timeout)
{
ULONG signalMask = 0;
return of_condition_timed_wait_or_signal(condition, mutex, timeout,
&signalMask);
}
int
of_condition_timed_wait_or_signal(of_condition_t *condition, of_mutex_t *mutex,
OFTimeInterval timeout, ULONG *signalMask)
of_condition_timed_wait_or_signal(of_condition_t *condition,
OFPlainMutex *mutex, OFTimeInterval timeout, ULONG *signalMask)
{
struct of_condition_waiting_task waitingTask = {
.task = FindTask(NULL),
.sigBit = AllocSignal(-1)
};
struct MsgPort port = {
.mp_Node = {
|
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
-
+
-
+
|
(struct IORequest *)&request, 0) != 0) {
error = EAGAIN;
goto fail;
}
Forbid();
if ((error = of_mutex_unlock(mutex)) != 0) {
if ((error = OFPlainMutexUnlock(mutex)) != 0) {
Permit();
goto fail;
}
waitingTask.next = condition->waitingTasks;
condition->waitingTasks = &waitingTask;
SendIO((struct IORequest *)&request);
mask = Wait((1ul << waitingTask.sigBit) | (1ul << port.mp_SigBit) |
*signalMask);
if (mask & (1ul << waitingTask.sigBit) || (*signalMask &= mask))
error = of_mutex_lock(mutex);
error = OFPlainMutexLock(mutex);
else if (mask & (1ul << port.mp_SigBit))
error = ETIMEDOUT;
else
/*
* This should not happen - it means something interrupted the
* Wait(), so the best we can do is return EINTR.
*/
|