69
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71
72
73
74
75
76
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78
79
80
81
82
83
84
85
86
87
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89
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91
92
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95
96
97
98
99
100
101
102
103
104
105
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107
108
109
110
111
112
113
114
115
116
117
118
|
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
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100
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102
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104
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110
111
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113
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117
118
119
120
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131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
+
+
+
+
+
+
+
+
+
+
-
+
-
+
-
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
|
}
return true;
}
bool
of_condition_wait(of_condition_t *condition, of_mutex_t *mutex)
{
ULONG signalMask = 0;
return of_condition_wait_or_signal(condition, mutex, &signalMask);
}
bool
of_condition_wait_or_signal(of_condition_t *condition, of_mutex_t *mutex,
ULONG *signalMask)
{
struct of_condition_waiting_task waitingTask = {
.task = FindTask(NULL),
.sigBit = AllocSignal(-1)
};
bool ret;
ULONG mask;
if (waitingTask.sigBit == -1) {
errno = EAGAIN;
return false;
}
Forbid();
if (!of_mutex_unlock(mutex)) {
FreeSignal(waitingTask.sigBit);
return false;
}
waitingTask.next = condition->waitingTasks;
condition->waitingTasks = &waitingTask;
Wait(1 << waitingTask.sigBit);
mask = Wait((1ul << waitingTask.sigBit) | *signalMask);
FreeSignal(waitingTask.sigBit);
ret = of_mutex_lock(mutex);
ret = of_mutex_lock(mutex);
else if (*signalMask &= mask)
ret = true;
else {
/*
* This should not happen - it means something interrupted the
* Wait(), so the best we can do is return EINTR.
*/
ret = false;
errno = EINTR;
}
FreeSignal(waitingTask.sigBit);
Permit();
return ret;
}
bool
of_condition_timed_wait(of_condition_t *condition, of_mutex_t *mutex,
of_time_interval_t timeout)
{
ULONG signalMask = 0;
return of_condition_timed_wait_or_signal(condition, mutex, timeout,
&signalMask);
}
bool
of_condition_timed_wait_or_signal(of_condition_t *condition, of_mutex_t *mutex,
of_time_interval_t timeout, ULONG *signalMask)
{
struct of_condition_waiting_task waitingTask = {
.task = FindTask(NULL),
.sigBit = AllocSignal(-1)
};
struct MsgPort port = {
.mp_Node = {
.ln_Type = NT_MSGPORT
|
173
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|
205
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213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
-
+
+
+
+
-
+
|
}
waitingTask.next = condition->waitingTasks;
condition->waitingTasks = &waitingTask;
SendIO((struct IORequest *)&request);
mask = Wait((1ul << waitingTask.sigBit) | (1ul << port.mp_SigBit));
mask = Wait((1ul << waitingTask.sigBit) | (1ul << port.mp_SigBit) |
*signalMask);
if (mask & (1ul << waitingTask.sigBit))
ret = of_mutex_lock(mutex);
else if (mask & (1ul << port.mp_SigBit)) {
ret = false;
errno = ETIMEDOUT;
} else if (*signalMask &= mask)
ret = true;
} else {
else {
/*
* This should not happen - it means something interrupted the
* Wait(), so the best we can do is return EINTR.
*/
ret = false;
errno = EINTR;
}
|