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Rev 1072 | Rev 1084 | ||
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Line 47... | Line 47... | ||
47 | /* Open channel that is assigned automatically to new tasks */ |
47 | /* Open channel that is assigned automatically to new tasks */ |
48 | answerbox_t *ipc_phone_0 = NULL; |
48 | answerbox_t *ipc_phone_0 = NULL; |
49 | 49 | ||
50 | static slab_cache_t *ipc_call_slab; |
50 | static slab_cache_t *ipc_call_slab; |
51 | 51 | ||
- | 52 | /* Initialize new call */ |
|
- | 53 | static void _ipc_call_init(call_t *call) |
|
- | 54 | { |
|
- | 55 | memsetb((__address)call, sizeof(*call), 0); |
|
- | 56 | call->callerbox = &TASK->answerbox; |
|
- | 57 | call->sender = TASK; |
|
- | 58 | } |
|
- | 59 | ||
52 | /** Allocate & initialize call structure |
60 | /** Allocate & initialize call structure |
53 | * |
61 | * |
54 | * The call is initialized, so that the reply will be directed |
62 | * The call is initialized, so that the reply will be directed |
55 | * to TASK->answerbox |
63 | * to TASK->answerbox |
56 | */ |
64 | */ |
57 | call_t * ipc_call_alloc(void) |
65 | call_t * ipc_call_alloc(void) |
58 | { |
66 | { |
59 | call_t *call; |
67 | call_t *call; |
60 | 68 | ||
61 | call = slab_alloc(ipc_call_slab, 0); |
69 | call = slab_alloc(ipc_call_slab, 0); |
62 | memsetb((__address)call, sizeof(*call), 0); |
- | |
63 | call->callerbox = &TASK->answerbox; |
- | |
64 | call->sender = TASK; |
70 | _ipc_call_init(call); |
65 | 71 | ||
66 | return call; |
72 | return call; |
67 | } |
73 | } |
68 | 74 | ||
69 | /** Initialize allocated call */ |
75 | /** Initialize allocated call */ |
70 | void ipc_call_init(call_t *call) |
76 | void ipc_call_static_init(call_t *call) |
71 | { |
77 | { |
72 | call->callerbox = &TASK->answerbox; |
78 | _ipc_call_init(call); |
73 | call->flags = IPC_CALL_STATIC_ALLOC; |
79 | call->flags |= IPC_CALL_STATIC_ALLOC; |
74 | call->sender = TASK; |
- | |
75 | } |
80 | } |
76 | 81 | ||
77 | /** Deallocate call stracuture */ |
82 | /** Deallocate call stracuture */ |
78 | void ipc_call_free(call_t *call) |
83 | void ipc_call_free(call_t *call) |
79 | { |
84 | { |
Line 94... | Line 99... | ||
94 | } |
99 | } |
95 | 100 | ||
96 | /** Connect phone to answerbox */ |
101 | /** Connect phone to answerbox */ |
97 | void ipc_phone_connect(phone_t *phone, answerbox_t *box) |
102 | void ipc_phone_connect(phone_t *phone, answerbox_t *box) |
98 | { |
103 | { |
- | 104 | spinlock_lock(&phone->lock); |
|
- | 105 | ||
99 | ASSERT(!phone->callee); |
106 | ASSERT(!phone->callee); |
100 | phone->busy = 1; |
107 | phone->busy = 1; |
101 | phone->callee = box; |
108 | phone->callee = box; |
102 | 109 | ||
103 | spinlock_lock(&box->lock); |
110 | spinlock_lock(&box->lock); |
104 | list_append(&phone->list, &box->connected_phones); |
111 | list_append(&phone->list, &box->connected_phones); |
105 | spinlock_unlock(&box->lock); |
112 | spinlock_unlock(&box->lock); |
- | 113 | ||
- | 114 | spinlock_unlock(&phone->lock); |
|
106 | } |
115 | } |
107 | 116 | ||
108 | /** Initialize phone structure and connect phone to naswerbox |
117 | /** Initialize phone structure and connect phone to naswerbox |
109 | */ |
118 | */ |
110 | void ipc_phone_init(phone_t *phone) |
119 | void ipc_phone_init(phone_t *phone) |
Line 112... | Line 121... | ||
112 | spinlock_initialize(&phone->lock, "phone_lock"); |
121 | spinlock_initialize(&phone->lock, "phone_lock"); |
113 | phone->callee = NULL; |
122 | phone->callee = NULL; |
114 | phone->busy = 0; |
123 | phone->busy = 0; |
115 | } |
124 | } |
116 | 125 | ||
117 | /** Disconnect phone from answerbox */ |
126 | /** Disconnect phone from answerbox |
- | 127 | * |
|
- | 128 | * It is allowed to call disconnect on already disconnected phone\ |
|
- | 129 | */ |
|
118 | void ipc_phone_destroy(phone_t *phone) |
130 | void ipc_phone_destroy(phone_t *phone) |
119 | { |
131 | { |
120 | answerbox_t *box = phone->callee; |
132 | answerbox_t *box = phone->callee; |
121 | 133 | ||
122 | ASSERT(box); |
134 | ASSERT(box); |
123 | 135 | ||
- | 136 | spinlock_lock(&phone->lock); |
|
124 | spinlock_lock(&box->lock); |
137 | spinlock_lock(&box->lock); |
- | 138 | ||
- | 139 | if (phone->callee) { |
|
125 | list_remove(&phone->list); |
140 | list_remove(&phone->list); |
- | 141 | phone->callee = NULL; |
|
- | 142 | } |
|
- | 143 | ||
126 | spinlock_unlock(&box->lock); |
144 | spinlock_unlock(&box->lock); |
- | 145 | spinlock_unlock(&phone->lock); |
|
127 | } |
146 | } |
128 | 147 | ||
129 | /** Helper function to facilitate synchronous calls */ |
148 | /** Helper function to facilitate synchronous calls */ |
130 | void ipc_call_sync(phone_t *phone, call_t *request) |
149 | void ipc_call_sync(phone_t *phone, call_t *request) |
131 | { |
150 | { |
Line 138... | Line 157... | ||
138 | 157 | ||
139 | ipc_call(phone, request); |
158 | ipc_call(phone, request); |
140 | ipc_wait_for_call(&sync_box, 0); |
159 | ipc_wait_for_call(&sync_box, 0); |
141 | } |
160 | } |
142 | 161 | ||
- | 162 | /** Answer message that was not dispatched and is not entered in |
|
- | 163 | * any queue |
|
- | 164 | */ |
|
- | 165 | static void _ipc_answer_free_call(call_t *call) |
|
- | 166 | { |
|
- | 167 | answerbox_t *callerbox = call->callerbox; |
|
- | 168 | ||
- | 169 | call->flags &= ~IPC_CALL_DISPATCHED; |
|
- | 170 | call->flags |= IPC_CALL_ANSWERED; |
|
- | 171 | ||
- | 172 | spinlock_lock(&callerbox->lock); |
|
- | 173 | list_append(&call->list, &callerbox->answers); |
|
- | 174 | spinlock_unlock(&callerbox->lock); |
|
- | 175 | waitq_wakeup(&callerbox->wq, 0); |
|
- | 176 | } |
|
- | 177 | ||
- | 178 | /** Answer message, that is in callee queue |
|
- | 179 | * |
|
- | 180 | * @param box Answerbox that is answering the message |
|
- | 181 | * @param call Modified request that is being sent back |
|
- | 182 | */ |
|
- | 183 | void ipc_answer(answerbox_t *box, call_t *call) |
|
- | 184 | { |
|
- | 185 | /* Remove from active box */ |
|
- | 186 | spinlock_lock(&box->lock); |
|
- | 187 | list_remove(&call->list); |
|
- | 188 | spinlock_unlock(&box->lock); |
|
- | 189 | /* Send back answer */ |
|
- | 190 | _ipc_answer_free_call(call); |
|
- | 191 | } |
|
- | 192 | ||
143 | /** Send a asynchronous request using phone to answerbox |
193 | /** Send a asynchronous request using phone to answerbox |
144 | * |
194 | * |
145 | * @param phone Phone connected to answerbox |
195 | * @param phone Phone connected to answerbox |
146 | * @param request Request to be sent |
196 | * @param request Request to be sent |
147 | */ |
197 | */ |
148 | void ipc_call(phone_t *phone, call_t *call) |
198 | void ipc_call(phone_t *phone, call_t *call) |
149 | { |
199 | { |
150 | answerbox_t *box = phone->callee; |
200 | answerbox_t *box; |
151 | 201 | ||
- | 202 | spinlock_lock(&phone->lock); |
|
- | 203 | box = phone->callee; |
|
152 | ASSERT(box); |
204 | if (!box) { |
- | 205 | /* Trying to send over disconnected phone */ |
|
- | 206 | IPC_SET_RETVAL(call->data, ENOENT); |
|
- | 207 | _ipc_answer_free_call(call); |
|
- | 208 | return; |
|
- | 209 | } |
|
153 | 210 | ||
154 | spinlock_lock(&box->lock); |
211 | spinlock_lock(&box->lock); |
155 | list_append(&call->list, &box->calls); |
212 | list_append(&call->list, &box->calls); |
156 | spinlock_unlock(&box->lock); |
213 | spinlock_unlock(&box->lock); |
157 | waitq_wakeup(&box->wq, 0); |
214 | waitq_wakeup(&box->wq, 0); |
- | 215 | ||
- | 216 | spinlock_unlock(&phone->lock); |
|
158 | } |
217 | } |
159 | 218 | ||
160 | /** Forwards call from one answerbox to a new one |
219 | /** Forwards call from one answerbox to a new one |
161 | * |
220 | * |
162 | * @param request Request to be forwarded |
221 | * @param request Request to be forwarded |
163 | * @param newbox Target answerbox |
222 | * @param newbox Target answerbox |
164 | * @param oldbox Old answerbox |
223 | * @param oldbox Old answerbox |
165 | */ |
224 | */ |
166 | void ipc_forward(call_t *call, answerbox_t *newbox, answerbox_t *oldbox) |
225 | void ipc_forward(call_t *call, phone_t *newphone, answerbox_t *oldbox) |
167 | { |
226 | { |
168 | spinlock_lock(&oldbox->lock); |
227 | spinlock_lock(&oldbox->lock); |
169 | list_remove(&call->list); |
228 | list_remove(&call->list); |
170 | spinlock_unlock(&oldbox->lock); |
229 | spinlock_unlock(&oldbox->lock); |
171 | 230 | ||
172 | spinlock_lock(&newbox->lock); |
- | |
173 | list_append(&call->list, &newbox->calls); |
- | |
174 | spinlock_lock(&newbox->lock); |
- | |
175 | waitq_wakeup(&newbox->wq, 0); |
231 | ipc_call(newphone, call); |
176 | } |
232 | } |
177 | 233 | ||
178 | /** Answer message back to phone |
- | |
179 | * |
- | |
180 | * @param box Answerbox that is answering the message |
- | |
181 | * @param request Modified request that is being sent back |
- | |
182 | */ |
- | |
183 | void ipc_answer(answerbox_t *box, call_t *request) |
- | |
184 | { |
- | |
185 | answerbox_t *callerbox = request->callerbox; |
- | |
186 | - | ||
187 | request->flags &= ~IPC_CALL_DISPATCHED; |
- | |
188 | request->flags |= IPC_CALL_ANSWERED; |
- | |
189 | - | ||
190 | spinlock_lock(&box->lock); |
- | |
191 | list_remove(&request->list); |
- | |
192 | spinlock_unlock(&box->lock); |
- | |
193 | - | ||
194 | spinlock_lock(&callerbox->lock); |
- | |
195 | list_append(&request->list, &callerbox->answers); |
- | |
196 | spinlock_unlock(&callerbox->lock); |
- | |
197 | waitq_wakeup(&callerbox->wq, 0); |
- | |
198 | } |
- | |
199 | 234 | ||
200 | /** Wait for phone call |
235 | /** Wait for phone call |
201 | * |
236 | * |
202 | * @return Recived message address |
237 | * @return Recived message address |
203 | * - to distinguish between call and answer, look at call->flags |
238 | * - to distinguish between call and answer, look at call->flags |