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1 | /* |
1 | /* |
2 | * Copyright (C) 2006 Ondrej Palkovsky |
2 | * Copyright (C) 2006 Ondrej Palkovsky |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** |
29 | /** |
30 | * Asynchronous library |
30 | * Asynchronous library |
31 | * |
31 | * |
32 | * The aim of this library is facilitating writing programs utilizing |
32 | * The aim of this library is facilitating writing programs utilizing |
33 | * the asynchronous nature of Helenos IPC, yet using a normal way |
33 | * the asynchronous nature of Helenos IPC, yet using a normal way |
34 | * of programming. |
34 | * of programming. |
35 | * |
35 | * |
36 | * You should be able to write very simple multithreaded programs, |
36 | * You should be able to write very simple multithreaded programs, |
37 | * the async framework will automatically take care of most synchronization |
37 | * the async framework will automatically take care of most synchronization |
38 | * problems. |
38 | * problems. |
39 | * |
39 | * |
40 | * Default semantics: |
40 | * Default semantics: |
41 | * - send() - send asynchronously. If the kernel refuses to send more |
41 | * - send() - send asynchronously. If the kernel refuses to send more |
42 | * messages, [ try to get responses from kernel, if nothing |
42 | * messages, [ try to get responses from kernel, if nothing |
43 | * found, might try synchronous ] |
43 | * found, might try synchronous ] |
44 | * |
44 | * |
45 | * Example of use: |
45 | * Example of use: |
46 | * |
46 | * |
47 | * 1) Multithreaded client application |
47 | * 1) Multithreaded client application |
48 | * create_thread(thread1); |
48 | * create_thread(thread1); |
49 | * create_thread(thread2); |
49 | * create_thread(thread2); |
50 | * ... |
50 | * ... |
51 | * |
51 | * |
52 | * thread1() { |
52 | * thread1() { |
53 | * conn = ipc_connect_me_to(); |
53 | * conn = ipc_connect_me_to(); |
54 | * c1 = send(conn); |
54 | * c1 = send(conn); |
55 | * c2 = send(conn); |
55 | * c2 = send(conn); |
56 | * wait_for(c1); |
56 | * wait_for(c1); |
57 | * wait_for(c2); |
57 | * wait_for(c2); |
58 | * } |
58 | * } |
59 | * |
59 | * |
60 | * |
60 | * |
61 | * 2) Multithreaded server application |
61 | * 2) Multithreaded server application |
62 | * main() { |
62 | * main() { |
63 | * async_manager(); |
63 | * async_manager(); |
64 | * } |
64 | * } |
65 | * |
65 | * |
66 | * |
66 | * |
67 | * client_connection(icallid, *icall) { |
67 | * client_connection(icallid, *icall) { |
68 | * if (want_refuse) { |
68 | * if (want_refuse) { |
69 | * ipc_answer_fast(icallid, ELIMIT, 0, 0); |
69 | * ipc_answer_fast(icallid, ELIMIT, 0, 0); |
70 | * return; |
70 | * return; |
71 | * } |
71 | * } |
72 | * ipc_answer_fast(icallid, 0, 0, 0); |
72 | * ipc_answer_fast(icallid, 0, 0, 0); |
73 | * |
73 | * |
74 | * callid = async_get_call(&call); |
74 | * callid = async_get_call(&call); |
75 | * handle(callid, call); |
75 | * handle(callid, call); |
76 | * ipc_answer_fast(callid, 1,2,3); |
76 | * ipc_answer_fast(callid, 1,2,3); |
77 | * |
77 | * |
78 | * callid = async_get_call(&call); |
78 | * callid = async_get_call(&call); |
79 | * .... |
79 | * .... |
80 | * } |
80 | * } |
81 | * |
81 | * |
82 | * TODO: Detaching/joining dead psthreads? |
82 | * TODO: Detaching/joining dead psthreads? |
83 | */ |
83 | */ |
84 | #include <futex.h> |
84 | #include <futex.h> |
85 | #include <async.h> |
85 | #include <async.h> |
86 | #include <psthread.h> |
86 | #include <psthread.h> |
87 | #include <stdio.h> |
87 | #include <stdio.h> |
88 | #include <libadt/hash_table.h> |
88 | #include <libadt/hash_table.h> |
89 | #include <libadt/list.h> |
89 | #include <libadt/list.h> |
90 | #include <ipc/ipc.h> |
90 | #include <ipc/ipc.h> |
91 | #include <assert.h> |
91 | #include <assert.h> |
92 | #include <errno.h> |
92 | #include <errno.h> |
93 | #include <time.h> |
93 | #include <time.h> |
94 | #include <arch/barrier.h> |
94 | #include <arch/barrier.h> |
95 | 95 | ||
96 | atomic_t async_futex = FUTEX_INITIALIZER; |
96 | atomic_t async_futex = FUTEX_INITIALIZER; |
97 | static hash_table_t conn_hash_table; |
97 | static hash_table_t conn_hash_table; |
98 | static LIST_INITIALIZE(timeout_list); |
98 | static LIST_INITIALIZE(timeout_list); |
99 | 99 | ||
100 | typedef struct { |
100 | typedef struct { |
101 | struct timeval expires; /**< Expiration time for waiting thread */ |
101 | struct timeval expires; /**< Expiration time for waiting thread */ |
102 | int inlist; /**< If true, this struct is in timeout list */ |
102 | int inlist; /**< If true, this struct is in timeout list */ |
103 | link_t link; |
103 | link_t link; |
104 | 104 | ||
105 | pstid_t ptid; /**< Thread waiting for this message */ |
105 | pstid_t ptid; /**< Thread waiting for this message */ |
106 | int active; /**< If this thread is currently active */ |
106 | int active; /**< If this thread is currently active */ |
107 | int timedout; /**< If true, we timed out */ |
107 | int timedout; /**< If true, we timed out */ |
108 | } awaiter_t; |
108 | } awaiter_t; |
109 | 109 | ||
110 | typedef struct { |
110 | typedef struct { |
111 | awaiter_t wdata; |
111 | awaiter_t wdata; |
112 | 112 | ||
113 | int done; /**< If reply was received */ |
113 | int done; /**< If reply was received */ |
114 | ipc_call_t *dataptr; /**< Pointer where the answer data |
114 | ipc_call_t *dataptr; /**< Pointer where the answer data |
115 | * is stored */ |
115 | * is stored */ |
116 | ipcarg_t retval; |
116 | ipcarg_t retval; |
117 | } amsg_t; |
117 | } amsg_t; |
118 | 118 | ||
119 | typedef struct { |
119 | typedef struct { |
120 | link_t link; |
120 | link_t link; |
121 | ipc_callid_t callid; |
121 | ipc_callid_t callid; |
122 | ipc_call_t call; |
122 | ipc_call_t call; |
123 | } msg_t; |
123 | } msg_t; |
124 | 124 | ||
125 | typedef struct { |
125 | typedef struct { |
126 | awaiter_t wdata; |
126 | awaiter_t wdata; |
127 | 127 | ||
128 | link_t link; /**< Hash table link */ |
128 | link_t link; /**< Hash table link */ |
129 | ipcarg_t in_phone_hash; /**< Incoming phone hash. */ |
129 | ipcarg_t in_phone_hash; /**< Incoming phone hash. */ |
130 | link_t msg_queue; /**< Messages that should be delivered to this thread */ |
130 | link_t msg_queue; /**< Messages that should be delivered to this thread */ |
131 | /* Structures for connection opening packet */ |
131 | /* Structures for connection opening packet */ |
132 | ipc_callid_t callid; |
132 | ipc_callid_t callid; |
133 | ipc_call_t call; |
133 | ipc_call_t call; |
134 | void (*cthread)(ipc_callid_t,ipc_call_t *); |
134 | void (*cthread)(ipc_callid_t,ipc_call_t *); |
135 | } connection_t; |
135 | } connection_t; |
136 | 136 | ||
137 | 137 | ||
138 | __thread connection_t *PS_connection; |
138 | __thread connection_t *PS_connection; |
139 | 139 | ||
140 | static void default_client_connection(ipc_callid_t callid, ipc_call_t *call); |
140 | static void default_client_connection(ipc_callid_t callid, ipc_call_t *call); |
- | 141 | static void default_interrupt_received(ipc_callid_t callid, ipc_call_t *call); |
|
141 | static async_client_conn_t client_connection = default_client_connection; |
142 | static async_client_conn_t client_connection = default_client_connection; |
- | 143 | static async_client_conn_t interrupt_received = default_interrupt_received; |
|
142 | 144 | ||
143 | /** Add microseconds to give timeval */ |
145 | /** Add microseconds to give timeval */ |
144 | static void tv_add(struct timeval *tv, suseconds_t usecs) |
146 | static void tv_add(struct timeval *tv, suseconds_t usecs) |
145 | { |
147 | { |
146 | tv->tv_sec += usecs / 1000000; |
148 | tv->tv_sec += usecs / 1000000; |
147 | tv->tv_usec += usecs % 1000000; |
149 | tv->tv_usec += usecs % 1000000; |
148 | if (tv->tv_usec > 1000000) { |
150 | if (tv->tv_usec > 1000000) { |
149 | tv->tv_sec++; |
151 | tv->tv_sec++; |
150 | tv->tv_usec -= 1000000; |
152 | tv->tv_usec -= 1000000; |
151 | } |
153 | } |
152 | } |
154 | } |
153 | 155 | ||
154 | /** Subtract 2 timevals, return microseconds difference */ |
156 | /** Subtract 2 timevals, return microseconds difference */ |
155 | static suseconds_t tv_sub(struct timeval *tv1, struct timeval *tv2) |
157 | static suseconds_t tv_sub(struct timeval *tv1, struct timeval *tv2) |
156 | { |
158 | { |
157 | suseconds_t result; |
159 | suseconds_t result; |
158 | 160 | ||
159 | result = tv1->tv_usec - tv2->tv_usec; |
161 | result = tv1->tv_usec - tv2->tv_usec; |
160 | result += (tv1->tv_sec - tv2->tv_sec) * 1000000; |
162 | result += (tv1->tv_sec - tv2->tv_sec) * 1000000; |
161 | 163 | ||
162 | return result; |
164 | return result; |
163 | } |
165 | } |
164 | 166 | ||
165 | /** Compare timeval |
167 | /** Compare timeval |
166 | * |
168 | * |
167 | * @return 1 if tv1 > tv2, otherwise 0 |
169 | * @return 1 if tv1 > tv2, otherwise 0 |
168 | */ |
170 | */ |
169 | static int tv_gt(struct timeval *tv1, struct timeval *tv2) |
171 | static int tv_gt(struct timeval *tv1, struct timeval *tv2) |
170 | { |
172 | { |
171 | if (tv1->tv_sec > tv2->tv_sec) |
173 | if (tv1->tv_sec > tv2->tv_sec) |
172 | return 1; |
174 | return 1; |
173 | if (tv1->tv_sec == tv2->tv_sec && tv1->tv_usec > tv2->tv_usec) |
175 | if (tv1->tv_sec == tv2->tv_sec && tv1->tv_usec > tv2->tv_usec) |
174 | return 1; |
176 | return 1; |
175 | return 0; |
177 | return 0; |
176 | } |
178 | } |
177 | static int tv_gteq(struct timeval *tv1, struct timeval *tv2) |
179 | static int tv_gteq(struct timeval *tv1, struct timeval *tv2) |
178 | { |
180 | { |
179 | if (tv1->tv_sec > tv2->tv_sec) |
181 | if (tv1->tv_sec > tv2->tv_sec) |
180 | return 1; |
182 | return 1; |
181 | if (tv1->tv_sec == tv2->tv_sec && tv1->tv_usec >= tv2->tv_usec) |
183 | if (tv1->tv_sec == tv2->tv_sec && tv1->tv_usec >= tv2->tv_usec) |
182 | return 1; |
184 | return 1; |
183 | return 0; |
185 | return 0; |
184 | } |
186 | } |
185 | 187 | ||
186 | /* Hash table functions */ |
188 | /* Hash table functions */ |
187 | #define CONN_HASH_TABLE_CHAINS 32 |
189 | #define CONN_HASH_TABLE_CHAINS 32 |
188 | 190 | ||
189 | static hash_index_t conn_hash(unsigned long *key) |
191 | static hash_index_t conn_hash(unsigned long *key) |
190 | { |
192 | { |
191 | assert(key); |
193 | assert(key); |
192 | return ((*key) >> 4) % CONN_HASH_TABLE_CHAINS; |
194 | return ((*key) >> 4) % CONN_HASH_TABLE_CHAINS; |
193 | } |
195 | } |
194 | 196 | ||
195 | static int conn_compare(unsigned long key[], hash_count_t keys, link_t *item) |
197 | static int conn_compare(unsigned long key[], hash_count_t keys, link_t *item) |
196 | { |
198 | { |
197 | connection_t *hs; |
199 | connection_t *hs; |
198 | 200 | ||
199 | hs = hash_table_get_instance(item, connection_t, link); |
201 | hs = hash_table_get_instance(item, connection_t, link); |
200 | 202 | ||
201 | return key[0] == hs->in_phone_hash; |
203 | return key[0] == hs->in_phone_hash; |
202 | } |
204 | } |
203 | 205 | ||
204 | static void conn_remove(link_t *item) |
206 | static void conn_remove(link_t *item) |
205 | { |
207 | { |
206 | free(hash_table_get_instance(item, connection_t, link)); |
208 | free(hash_table_get_instance(item, connection_t, link)); |
207 | } |
209 | } |
208 | 210 | ||
209 | 211 | ||
210 | /** Operations for NS hash table. */ |
212 | /** Operations for NS hash table. */ |
211 | static hash_table_operations_t conn_hash_table_ops = { |
213 | static hash_table_operations_t conn_hash_table_ops = { |
212 | .hash = conn_hash, |
214 | .hash = conn_hash, |
213 | .compare = conn_compare, |
215 | .compare = conn_compare, |
214 | .remove_callback = conn_remove |
216 | .remove_callback = conn_remove |
215 | }; |
217 | }; |
216 | 218 | ||
217 | /** Insert sort timeout msg into timeouts list |
219 | /** Insert sort timeout msg into timeouts list |
218 | * |
220 | * |
219 | */ |
221 | */ |
220 | static void insert_timeout(awaiter_t *wd) |
222 | static void insert_timeout(awaiter_t *wd) |
221 | { |
223 | { |
222 | link_t *tmp; |
224 | link_t *tmp; |
223 | awaiter_t *cur; |
225 | awaiter_t *cur; |
224 | 226 | ||
225 | wd->timedout = 0; |
227 | wd->timedout = 0; |
226 | 228 | ||
227 | tmp = timeout_list.next; |
229 | tmp = timeout_list.next; |
228 | while (tmp != &timeout_list) { |
230 | while (tmp != &timeout_list) { |
229 | cur = list_get_instance(tmp, awaiter_t, link); |
231 | cur = list_get_instance(tmp, awaiter_t, link); |
230 | if (tv_gteq(&cur->expires, &wd->expires)) |
232 | if (tv_gteq(&cur->expires, &wd->expires)) |
231 | break; |
233 | break; |
232 | tmp = tmp->next; |
234 | tmp = tmp->next; |
233 | } |
235 | } |
234 | list_append(&wd->link, tmp); |
236 | list_append(&wd->link, tmp); |
235 | } |
237 | } |
236 | 238 | ||
237 | /*************************************************/ |
239 | /*************************************************/ |
238 | 240 | ||
239 | /** Try to route a call to an appropriate connection thread |
241 | /** Try to route a call to an appropriate connection thread |
240 | * |
242 | * |
241 | */ |
243 | */ |
242 | static int route_call(ipc_callid_t callid, ipc_call_t *call) |
244 | static int route_call(ipc_callid_t callid, ipc_call_t *call) |
243 | { |
245 | { |
244 | connection_t *conn; |
246 | connection_t *conn; |
245 | msg_t *msg; |
247 | msg_t *msg; |
246 | link_t *hlp; |
248 | link_t *hlp; |
247 | unsigned long key; |
249 | unsigned long key; |
248 | 250 | ||
249 | futex_down(&async_futex); |
251 | futex_down(&async_futex); |
250 | 252 | ||
251 | key = call->in_phone_hash; |
253 | key = call->in_phone_hash; |
252 | hlp = hash_table_find(&conn_hash_table, &key); |
254 | hlp = hash_table_find(&conn_hash_table, &key); |
253 | if (!hlp) { |
255 | if (!hlp) { |
254 | futex_up(&async_futex); |
256 | futex_up(&async_futex); |
255 | return 0; |
257 | return 0; |
256 | } |
258 | } |
257 | conn = hash_table_get_instance(hlp, connection_t, link); |
259 | conn = hash_table_get_instance(hlp, connection_t, link); |
258 | 260 | ||
259 | msg = malloc(sizeof(*msg)); |
261 | msg = malloc(sizeof(*msg)); |
260 | msg->callid = callid; |
262 | msg->callid = callid; |
261 | msg->call = *call; |
263 | msg->call = *call; |
262 | list_append(&msg->link, &conn->msg_queue); |
264 | list_append(&msg->link, &conn->msg_queue); |
263 | 265 | ||
264 | /* If the call is waiting for event, run it */ |
266 | /* If the call is waiting for event, run it */ |
265 | if (!conn->wdata.active) { |
267 | if (!conn->wdata.active) { |
266 | /* If in timeout list, remove it */ |
268 | /* If in timeout list, remove it */ |
267 | if (conn->wdata.inlist) { |
269 | if (conn->wdata.inlist) { |
268 | conn->wdata.inlist = 0; |
270 | conn->wdata.inlist = 0; |
269 | list_remove(&conn->wdata.link); |
271 | list_remove(&conn->wdata.link); |
270 | } |
272 | } |
271 | conn->wdata.active = 1; |
273 | conn->wdata.active = 1; |
272 | psthread_add_ready(conn->wdata.ptid); |
274 | psthread_add_ready(conn->wdata.ptid); |
273 | } |
275 | } |
274 | 276 | ||
275 | futex_up(&async_futex); |
277 | futex_up(&async_futex); |
276 | 278 | ||
277 | return 1; |
279 | return 1; |
278 | } |
280 | } |
279 | 281 | ||
280 | /** Return new incoming message for current(thread-local) connection */ |
282 | /** Return new incoming message for current(thread-local) connection */ |
281 | ipc_callid_t async_get_call_timeout(ipc_call_t *call, suseconds_t usecs) |
283 | ipc_callid_t async_get_call_timeout(ipc_call_t *call, suseconds_t usecs) |
282 | { |
284 | { |
283 | msg_t *msg; |
285 | msg_t *msg; |
284 | ipc_callid_t callid; |
286 | ipc_callid_t callid; |
285 | connection_t *conn; |
287 | connection_t *conn; |
286 | 288 | ||
287 | assert(PS_connection); |
289 | assert(PS_connection); |
288 | /* GCC 4.1.0 coughs on PS_connection-> dereference, |
290 | /* GCC 4.1.0 coughs on PS_connection-> dereference, |
289 | * GCC 4.1.1 happilly puts the rdhwr instruction in delay slot. |
291 | * GCC 4.1.1 happilly puts the rdhwr instruction in delay slot. |
290 | * I would never expect to find so many errors in |
292 | * I would never expect to find so many errors in |
291 | * compiler *($&$(*&$ |
293 | * compiler *($&$(*&$ |
292 | */ |
294 | */ |
293 | conn = PS_connection; |
295 | conn = PS_connection; |
294 | 296 | ||
295 | if (usecs < 0) /* TODO: let it get through the ipc_call once */ |
297 | if (usecs < 0) /* TODO: let it get through the ipc_call once */ |
296 | return 0; |
298 | return 0; |
297 | 299 | ||
298 | futex_down(&async_futex); |
300 | futex_down(&async_futex); |
299 | 301 | ||
300 | if (usecs) { |
302 | if (usecs) { |
301 | gettimeofday(&conn->wdata.expires, NULL); |
303 | gettimeofday(&conn->wdata.expires, NULL); |
302 | tv_add(&conn->wdata.expires, usecs); |
304 | tv_add(&conn->wdata.expires, usecs); |
303 | } else { |
305 | } else { |
304 | conn->wdata.inlist = 0; |
306 | conn->wdata.inlist = 0; |
305 | } |
307 | } |
306 | /* If nothing in queue, wait until something appears */ |
308 | /* If nothing in queue, wait until something appears */ |
307 | while (list_empty(&conn->msg_queue)) { |
309 | while (list_empty(&conn->msg_queue)) { |
308 | if (usecs) { |
310 | if (usecs) { |
309 | conn->wdata.inlist = 1; |
311 | conn->wdata.inlist = 1; |
310 | insert_timeout(&conn->wdata); |
312 | insert_timeout(&conn->wdata); |
311 | } |
313 | } |
312 | conn->wdata.active = 0; |
314 | conn->wdata.active = 0; |
313 | psthread_schedule_next_adv(PS_TO_MANAGER); |
315 | psthread_schedule_next_adv(PS_TO_MANAGER); |
314 | /* Futex is up after getting back from async_manager |
316 | /* Futex is up after getting back from async_manager |
315 | * get it again */ |
317 | * get it again */ |
316 | futex_down(&async_futex); |
318 | futex_down(&async_futex); |
317 | if (usecs && conn->wdata.timedout && \ |
319 | if (usecs && conn->wdata.timedout && \ |
318 | list_empty(&conn->msg_queue)) { |
320 | list_empty(&conn->msg_queue)) { |
319 | /* If we timed out-> exit */ |
321 | /* If we timed out-> exit */ |
320 | futex_up(&async_futex); |
322 | futex_up(&async_futex); |
321 | return 0; |
323 | return 0; |
322 | } |
324 | } |
323 | } |
325 | } |
324 | 326 | ||
325 | msg = list_get_instance(conn->msg_queue.next, msg_t, link); |
327 | msg = list_get_instance(conn->msg_queue.next, msg_t, link); |
326 | list_remove(&msg->link); |
328 | list_remove(&msg->link); |
327 | callid = msg->callid; |
329 | callid = msg->callid; |
328 | *call = msg->call; |
330 | *call = msg->call; |
329 | free(msg); |
331 | free(msg); |
330 | 332 | ||
331 | futex_up(&async_futex); |
333 | futex_up(&async_futex); |
332 | return callid; |
334 | return callid; |
333 | } |
335 | } |
334 | 336 | ||
335 | /** Thread function that gets created on new connection |
337 | /** Thread function that gets created on new connection |
336 | * |
338 | * |
337 | * This function is defined as a weak symbol - to be redefined in |
339 | * This function is defined as a weak symbol - to be redefined in |
338 | * user code. |
340 | * user code. |
339 | */ |
341 | */ |
340 | static void default_client_connection(ipc_callid_t callid, ipc_call_t *call) |
342 | static void default_client_connection(ipc_callid_t callid, ipc_call_t *call) |
341 | { |
343 | { |
342 | ipc_answer_fast(callid, ENOENT, 0, 0); |
344 | ipc_answer_fast(callid, ENOENT, 0, 0); |
343 | } |
345 | } |
344 | - | ||
345 | /** Function that gets called on interrupt receival |
- | |
346 | * |
- | |
347 | * This function is defined as a weak symbol - to be redefined in |
- | |
348 | * user code. |
- | |
349 | */ |
- | |
350 | void interrupt_received(ipc_call_t *call) |
346 | static void default_interrupt_received(ipc_callid_t callid, ipc_call_t *call) |
351 | { |
347 | { |
352 | } |
348 | } |
353 | 349 | ||
354 | - | ||
355 | /** Wrapper for client connection thread |
350 | /** Wrapper for client connection thread |
356 | * |
351 | * |
357 | * When new connection arrives, thread with this function is created. |
352 | * When new connection arrives, thread with this function is created. |
358 | * It calls client_connection and does final cleanup. |
353 | * It calls client_connection and does final cleanup. |
359 | * |
354 | * |
360 | * @parameter arg Connection structure pointer |
355 | * @parameter arg Connection structure pointer |
361 | */ |
356 | */ |
362 | static int connection_thread(void *arg) |
357 | static int connection_thread(void *arg) |
363 | { |
358 | { |
364 | unsigned long key; |
359 | unsigned long key; |
365 | msg_t *msg; |
360 | msg_t *msg; |
366 | 361 | ||
367 | /* Setup thread local connection pointer */ |
362 | /* Setup thread local connection pointer */ |
368 | PS_connection = (connection_t *)arg; |
363 | PS_connection = (connection_t *)arg; |
369 | PS_connection->cthread(PS_connection->callid, &PS_connection->call); |
364 | PS_connection->cthread(PS_connection->callid, &PS_connection->call); |
370 | 365 | ||
371 | /* Remove myself from connection hash table */ |
366 | /* Remove myself from connection hash table */ |
372 | futex_down(&async_futex); |
367 | futex_down(&async_futex); |
373 | key = PS_connection->in_phone_hash; |
368 | key = PS_connection->in_phone_hash; |
374 | hash_table_remove(&conn_hash_table, &key, 1); |
369 | hash_table_remove(&conn_hash_table, &key, 1); |
375 | futex_up(&async_futex); |
370 | futex_up(&async_futex); |
376 | /* Answer all remaining messages with ehangup */ |
371 | /* Answer all remaining messages with ehangup */ |
377 | while (!list_empty(&PS_connection->msg_queue)) { |
372 | while (!list_empty(&PS_connection->msg_queue)) { |
378 | msg = list_get_instance(PS_connection->msg_queue.next, msg_t, link); |
373 | msg = list_get_instance(PS_connection->msg_queue.next, msg_t, link); |
379 | list_remove(&msg->link); |
374 | list_remove(&msg->link); |
380 | ipc_answer_fast(msg->callid, EHANGUP, 0, 0); |
375 | ipc_answer_fast(msg->callid, EHANGUP, 0, 0); |
381 | free(msg); |
376 | free(msg); |
382 | } |
377 | } |
383 | } |
378 | } |
384 | 379 | ||
385 | /** Create new thread for a new connection |
380 | /** Create new thread for a new connection |
386 | * |
381 | * |
387 | * Creates new thread for connection, fills in connection |
382 | * Creates new thread for connection, fills in connection |
388 | * structures and inserts it into the hash table, so that |
383 | * structures and inserts it into the hash table, so that |
389 | * later we can easily do routing of messages to particular |
384 | * later we can easily do routing of messages to particular |
390 | * threads. |
385 | * threads. |
391 | * |
386 | * |
392 | * @param in_phone_hash Identification of the incoming connection |
387 | * @param in_phone_hash Identification of the incoming connection |
393 | * @param callid Callid of the IPC_M_CONNECT_ME_TO packet |
388 | * @param callid Callid of the IPC_M_CONNECT_ME_TO packet |
394 | * @param call Call data of the opening packet |
389 | * @param call Call data of the opening packet |
395 | * @param cthread Thread function that should be called upon |
390 | * @param cthread Thread function that should be called upon |
396 | * opening the connection |
391 | * opening the connection |
397 | * @return New thread id |
392 | * @return New thread id |
398 | */ |
393 | */ |
399 | pstid_t async_new_connection(ipcarg_t in_phone_hash,ipc_callid_t callid, |
394 | pstid_t async_new_connection(ipcarg_t in_phone_hash,ipc_callid_t callid, |
400 | ipc_call_t *call, |
395 | ipc_call_t *call, |
401 | void (*cthread)(ipc_callid_t,ipc_call_t *)) |
396 | void (*cthread)(ipc_callid_t,ipc_call_t *)) |
402 | { |
397 | { |
403 | pstid_t ptid; |
398 | pstid_t ptid; |
404 | connection_t *conn; |
399 | connection_t *conn; |
405 | unsigned long key; |
400 | unsigned long key; |
406 | 401 | ||
407 | conn = malloc(sizeof(*conn)); |
402 | conn = malloc(sizeof(*conn)); |
408 | if (!conn) { |
403 | if (!conn) { |
409 | ipc_answer_fast(callid, ENOMEM, 0, 0); |
404 | ipc_answer_fast(callid, ENOMEM, 0, 0); |
410 | return NULL; |
405 | return NULL; |
411 | } |
406 | } |
412 | conn->in_phone_hash = in_phone_hash; |
407 | conn->in_phone_hash = in_phone_hash; |
413 | list_initialize(&conn->msg_queue); |
408 | list_initialize(&conn->msg_queue); |
414 | conn->callid = callid; |
409 | conn->callid = callid; |
415 | if (call) |
410 | if (call) |
416 | conn->call = *call; |
411 | conn->call = *call; |
417 | conn->wdata.active = 1; /* We will activate it asap */ |
412 | conn->wdata.active = 1; /* We will activate it asap */ |
418 | conn->cthread = cthread; |
413 | conn->cthread = cthread; |
419 | 414 | ||
420 | conn->wdata.ptid = psthread_create(connection_thread, conn); |
415 | conn->wdata.ptid = psthread_create(connection_thread, conn); |
421 | if (!conn->wdata.ptid) { |
416 | if (!conn->wdata.ptid) { |
422 | free(conn); |
417 | free(conn); |
423 | ipc_answer_fast(callid, ENOMEM, 0, 0); |
418 | ipc_answer_fast(callid, ENOMEM, 0, 0); |
424 | return NULL; |
419 | return NULL; |
425 | } |
420 | } |
426 | /* Add connection to hash table */ |
421 | /* Add connection to hash table */ |
427 | key = conn->in_phone_hash; |
422 | key = conn->in_phone_hash; |
428 | futex_down(&async_futex); |
423 | futex_down(&async_futex); |
429 | hash_table_insert(&conn_hash_table, &key, &conn->link); |
424 | hash_table_insert(&conn_hash_table, &key, &conn->link); |
430 | futex_up(&async_futex); |
425 | futex_up(&async_futex); |
431 | 426 | ||
432 | psthread_add_ready(conn->wdata.ptid); |
427 | psthread_add_ready(conn->wdata.ptid); |
433 | 428 | ||
434 | return conn->wdata.ptid; |
429 | return conn->wdata.ptid; |
435 | } |
430 | } |
436 | 431 | ||
437 | /** Handle call that was received */ |
432 | /** Handle call that was received */ |
438 | static void handle_call(ipc_callid_t callid, ipc_call_t *call) |
433 | static void handle_call(ipc_callid_t callid, ipc_call_t *call) |
439 | { |
434 | { |
440 | /* Unrouted call - do some default behaviour */ |
435 | /* Unrouted call - do some default behaviour */ |
441 | switch (IPC_GET_METHOD(*call)) { |
436 | switch (IPC_GET_METHOD(*call)) { |
442 | case IPC_M_INTERRUPT: |
437 | case IPC_M_INTERRUPT: |
443 | interrupt_received(call); |
438 | (*interrupt_received)(callid,call); |
444 | return; |
439 | return; |
445 | case IPC_M_CONNECT_ME_TO: |
440 | case IPC_M_CONNECT_ME_TO: |
446 | /* Open new connection with thread etc. */ |
441 | /* Open new connection with thread etc. */ |
447 | async_new_connection(IPC_GET_ARG3(*call), callid, call, client_connection); |
442 | async_new_connection(IPC_GET_ARG3(*call), callid, call, client_connection); |
448 | return; |
443 | return; |
449 | } |
444 | } |
450 | 445 | ||
451 | /* Try to route call through connection tables */ |
446 | /* Try to route call through connection tables */ |
452 | if (route_call(callid, call)) |
447 | if (route_call(callid, call)) |
453 | return; |
448 | return; |
454 | 449 | ||
455 | /* Unknown call from unknown phone - hang it up */ |
450 | /* Unknown call from unknown phone - hang it up */ |
456 | ipc_answer_fast(callid, EHANGUP, 0, 0); |
451 | ipc_answer_fast(callid, EHANGUP, 0, 0); |
457 | } |
452 | } |
458 | 453 | ||
459 | /** Fire all timeouts that expired |
454 | /** Fire all timeouts that expired |
460 | * |
455 | * |
461 | */ |
456 | */ |
462 | static void handle_expired_timeouts(void) |
457 | static void handle_expired_timeouts(void) |
463 | { |
458 | { |
464 | struct timeval tv; |
459 | struct timeval tv; |
465 | awaiter_t *waiter; |
460 | awaiter_t *waiter; |
466 | link_t *cur; |
461 | link_t *cur; |
467 | 462 | ||
468 | gettimeofday(&tv,NULL); |
463 | gettimeofday(&tv,NULL); |
469 | futex_down(&async_futex); |
464 | futex_down(&async_futex); |
470 | 465 | ||
471 | cur = timeout_list.next; |
466 | cur = timeout_list.next; |
472 | while (cur != &timeout_list) { |
467 | while (cur != &timeout_list) { |
473 | waiter = list_get_instance(cur,awaiter_t,link); |
468 | waiter = list_get_instance(cur,awaiter_t,link); |
474 | if (tv_gt(&waiter->expires, &tv)) |
469 | if (tv_gt(&waiter->expires, &tv)) |
475 | break; |
470 | break; |
476 | cur = cur->next; |
471 | cur = cur->next; |
477 | list_remove(&waiter->link); |
472 | list_remove(&waiter->link); |
478 | waiter->inlist = 0; |
473 | waiter->inlist = 0; |
479 | waiter->timedout = 1; |
474 | waiter->timedout = 1; |
480 | /* Redundant condition? The thread should not |
475 | /* Redundant condition? The thread should not |
481 | * be active when it gets here. |
476 | * be active when it gets here. |
482 | */ |
477 | */ |
483 | if (!waiter->active) { |
478 | if (!waiter->active) { |
484 | waiter->active = 1; |
479 | waiter->active = 1; |
485 | psthread_add_ready(waiter->ptid); |
480 | psthread_add_ready(waiter->ptid); |
486 | } |
481 | } |
487 | } |
482 | } |
488 | 483 | ||
489 | futex_up(&async_futex); |
484 | futex_up(&async_futex); |
490 | } |
485 | } |
491 | 486 | ||
492 | /** Endless loop dispatching incoming calls and answers */ |
487 | /** Endless loop dispatching incoming calls and answers */ |
493 | int async_manager(void) |
488 | int async_manager(void) |
494 | { |
489 | { |
495 | ipc_call_t call; |
490 | ipc_call_t call; |
496 | ipc_callid_t callid; |
491 | ipc_callid_t callid; |
497 | int timeout; |
492 | int timeout; |
498 | awaiter_t *waiter; |
493 | awaiter_t *waiter; |
499 | struct timeval tv; |
494 | struct timeval tv; |
500 | 495 | ||
501 | while (1) { |
496 | while (1) { |
502 | if (psthread_schedule_next_adv(PS_FROM_MANAGER)) { |
497 | if (psthread_schedule_next_adv(PS_FROM_MANAGER)) { |
503 | futex_up(&async_futex); /* async_futex is always held |
498 | futex_up(&async_futex); /* async_futex is always held |
504 | * when entering manager thread |
499 | * when entering manager thread |
505 | */ |
500 | */ |
506 | continue; |
501 | continue; |
507 | } |
502 | } |
508 | futex_down(&async_futex); |
503 | futex_down(&async_futex); |
509 | if (!list_empty(&timeout_list)) { |
504 | if (!list_empty(&timeout_list)) { |
510 | waiter = list_get_instance(timeout_list.next,awaiter_t,link); |
505 | waiter = list_get_instance(timeout_list.next,awaiter_t,link); |
511 | gettimeofday(&tv,NULL); |
506 | gettimeofday(&tv,NULL); |
512 | if (tv_gteq(&tv, &waiter->expires)) { |
507 | if (tv_gteq(&tv, &waiter->expires)) { |
513 | futex_up(&async_futex); |
508 | futex_up(&async_futex); |
514 | handle_expired_timeouts(); |
509 | handle_expired_timeouts(); |
515 | continue; |
510 | continue; |
516 | } else |
511 | } else |
517 | timeout = tv_sub(&waiter->expires, &tv); |
512 | timeout = tv_sub(&waiter->expires, &tv); |
518 | } else |
513 | } else |
519 | timeout = SYNCH_NO_TIMEOUT; |
514 | timeout = SYNCH_NO_TIMEOUT; |
520 | futex_up(&async_futex); |
515 | futex_up(&async_futex); |
521 | 516 | ||
522 | callid = ipc_wait_cycle(&call, timeout, SYNCH_FLAGS_NONE); |
517 | callid = ipc_wait_cycle(&call, timeout, SYNCH_FLAGS_NONE); |
523 | 518 | ||
524 | if (!callid) { |
519 | if (!callid) { |
525 | handle_expired_timeouts(); |
520 | handle_expired_timeouts(); |
526 | continue; |
521 | continue; |
527 | } |
522 | } |
528 | 523 | ||
529 | if (callid & IPC_CALLID_ANSWERED) |
524 | if (callid & IPC_CALLID_ANSWERED) |
530 | continue; |
525 | continue; |
531 | 526 | ||
532 | handle_call(callid, &call); |
527 | handle_call(callid, &call); |
533 | } |
528 | } |
534 | } |
529 | } |
535 | 530 | ||
536 | /** Function to start async_manager as a standalone thread |
531 | /** Function to start async_manager as a standalone thread |
537 | * |
532 | * |
538 | * When more kernel threads are used, one async manager should |
533 | * When more kernel threads are used, one async manager should |
539 | * exist per thread. The particular implementation may change, |
534 | * exist per thread. The particular implementation may change, |
540 | * currently one async_manager is started automatically per kernel |
535 | * currently one async_manager is started automatically per kernel |
541 | * thread except main thread. |
536 | * thread except main thread. |
542 | */ |
537 | */ |
543 | static int async_manager_thread(void *arg) |
538 | static int async_manager_thread(void *arg) |
544 | { |
539 | { |
545 | futex_up(&async_futex); /* async_futex is always locked when entering |
540 | futex_up(&async_futex); /* async_futex is always locked when entering |
546 | * manager */ |
541 | * manager */ |
547 | async_manager(); |
542 | async_manager(); |
548 | } |
543 | } |
549 | 544 | ||
550 | /** Add one manager to manager list */ |
545 | /** Add one manager to manager list */ |
551 | void async_create_manager(void) |
546 | void async_create_manager(void) |
552 | { |
547 | { |
553 | pstid_t ptid; |
548 | pstid_t ptid; |
554 | 549 | ||
555 | ptid = psthread_create(async_manager_thread, NULL); |
550 | ptid = psthread_create(async_manager_thread, NULL); |
556 | psthread_add_manager(ptid); |
551 | psthread_add_manager(ptid); |
557 | } |
552 | } |
558 | 553 | ||
559 | /** Remove one manager from manager list */ |
554 | /** Remove one manager from manager list */ |
560 | void async_destroy_manager(void) |
555 | void async_destroy_manager(void) |
561 | { |
556 | { |
562 | psthread_remove_manager(); |
557 | psthread_remove_manager(); |
563 | } |
558 | } |
564 | 559 | ||
565 | /** Initialize internal structures needed for async manager */ |
560 | /** Initialize internal structures needed for async manager */ |
566 | int _async_init(void) |
561 | int _async_init(void) |
567 | { |
562 | { |
568 | if (!hash_table_create(&conn_hash_table, CONN_HASH_TABLE_CHAINS, 1, &conn_hash_table_ops)) { |
563 | if (!hash_table_create(&conn_hash_table, CONN_HASH_TABLE_CHAINS, 1, &conn_hash_table_ops)) { |
569 | printf("%s: cannot create hash table\n", "async"); |
564 | printf("%s: cannot create hash table\n", "async"); |
570 | return ENOMEM; |
565 | return ENOMEM; |
571 | } |
566 | } |
572 | 567 | ||
573 | } |
568 | } |
574 | 569 | ||
575 | /** IPC handler for messages in async framework |
570 | /** IPC handler for messages in async framework |
576 | * |
571 | * |
577 | * Notify thread that is waiting for this message, that it arrived |
572 | * Notify thread that is waiting for this message, that it arrived |
578 | */ |
573 | */ |
579 | static void reply_received(void *private, int retval, |
574 | static void reply_received(void *private, int retval, |
580 | ipc_call_t *data) |
575 | ipc_call_t *data) |
581 | { |
576 | { |
582 | amsg_t *msg = (amsg_t *) private; |
577 | amsg_t *msg = (amsg_t *) private; |
583 | 578 | ||
584 | msg->retval = retval; |
579 | msg->retval = retval; |
585 | 580 | ||
586 | futex_down(&async_futex); |
581 | futex_down(&async_futex); |
587 | /* Copy data after futex_down, just in case the |
582 | /* Copy data after futex_down, just in case the |
588 | * call was detached |
583 | * call was detached |
589 | */ |
584 | */ |
590 | if (msg->dataptr) |
585 | if (msg->dataptr) |
591 | *msg->dataptr = *data; |
586 | *msg->dataptr = *data; |
592 | 587 | ||
593 | write_barrier(); |
588 | write_barrier(); |
594 | /* Remove message from timeout list */ |
589 | /* Remove message from timeout list */ |
595 | if (msg->wdata.inlist) |
590 | if (msg->wdata.inlist) |
596 | list_remove(&msg->wdata.link); |
591 | list_remove(&msg->wdata.link); |
597 | msg->done = 1; |
592 | msg->done = 1; |
598 | if (! msg->wdata.active) { |
593 | if (! msg->wdata.active) { |
599 | msg->wdata.active = 1; |
594 | msg->wdata.active = 1; |
600 | psthread_add_ready(msg->wdata.ptid); |
595 | psthread_add_ready(msg->wdata.ptid); |
601 | } |
596 | } |
602 | futex_up(&async_futex); |
597 | futex_up(&async_futex); |
603 | } |
598 | } |
604 | 599 | ||
605 | /** Send message and return id of the sent message |
600 | /** Send message and return id of the sent message |
606 | * |
601 | * |
607 | * The return value can be used as input for async_wait() to wait |
602 | * The return value can be used as input for async_wait() to wait |
608 | * for completion. |
603 | * for completion. |
609 | */ |
604 | */ |
610 | aid_t async_send_2(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2, |
605 | aid_t async_send_2(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2, |
611 | ipc_call_t *dataptr) |
606 | ipc_call_t *dataptr) |
612 | { |
607 | { |
613 | amsg_t *msg; |
608 | amsg_t *msg; |
614 | 609 | ||
615 | msg = malloc(sizeof(*msg)); |
610 | msg = malloc(sizeof(*msg)); |
616 | msg->done = 0; |
611 | msg->done = 0; |
617 | msg->dataptr = dataptr; |
612 | msg->dataptr = dataptr; |
618 | 613 | ||
619 | msg->wdata.active = 1; /* We may sleep in next method, but it |
614 | msg->wdata.active = 1; /* We may sleep in next method, but it |
620 | * will use it's own mechanism */ |
615 | * will use it's own mechanism */ |
621 | ipc_call_async_2(phoneid,method,arg1,arg2,msg,reply_received,1); |
616 | ipc_call_async_2(phoneid,method,arg1,arg2,msg,reply_received,1); |
622 | 617 | ||
623 | return (aid_t) msg; |
618 | return (aid_t) msg; |
624 | } |
619 | } |
625 | 620 | ||
626 | /** Send message and return id of the sent message |
621 | /** Send message and return id of the sent message |
627 | * |
622 | * |
628 | * The return value can be used as input for async_wait() to wait |
623 | * The return value can be used as input for async_wait() to wait |
629 | * for completion. |
624 | * for completion. |
630 | */ |
625 | */ |
631 | aid_t async_send_3(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2, |
626 | aid_t async_send_3(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2, |
632 | ipcarg_t arg3, ipc_call_t *dataptr) |
627 | ipcarg_t arg3, ipc_call_t *dataptr) |
633 | { |
628 | { |
634 | amsg_t *msg; |
629 | amsg_t *msg; |
635 | 630 | ||
636 | msg = malloc(sizeof(*msg)); |
631 | msg = malloc(sizeof(*msg)); |
637 | msg->done = 0; |
632 | msg->done = 0; |
638 | msg->dataptr = dataptr; |
633 | msg->dataptr = dataptr; |
639 | 634 | ||
640 | msg->wdata.active = 1; /* We may sleep in next method, but it |
635 | msg->wdata.active = 1; /* We may sleep in next method, but it |
641 | * will use it's own mechanism */ |
636 | * will use it's own mechanism */ |
642 | ipc_call_async_3(phoneid,method,arg1,arg2,arg3, msg,reply_received,1); |
637 | ipc_call_async_3(phoneid,method,arg1,arg2,arg3, msg,reply_received,1); |
643 | 638 | ||
644 | return (aid_t) msg; |
639 | return (aid_t) msg; |
645 | } |
640 | } |
646 | 641 | ||
647 | /** Wait for a message sent by async framework |
642 | /** Wait for a message sent by async framework |
648 | * |
643 | * |
649 | * @param amsgid Message ID to wait for |
644 | * @param amsgid Message ID to wait for |
650 | * @param retval Pointer to variable where will be stored retval |
645 | * @param retval Pointer to variable where will be stored retval |
651 | * of the answered message. If NULL, it is ignored. |
646 | * of the answered message. If NULL, it is ignored. |
652 | * |
647 | * |
653 | */ |
648 | */ |
654 | void async_wait_for(aid_t amsgid, ipcarg_t *retval) |
649 | void async_wait_for(aid_t amsgid, ipcarg_t *retval) |
655 | { |
650 | { |
656 | amsg_t *msg = (amsg_t *) amsgid; |
651 | amsg_t *msg = (amsg_t *) amsgid; |
657 | connection_t *conn; |
652 | connection_t *conn; |
658 | 653 | ||
659 | futex_down(&async_futex); |
654 | futex_down(&async_futex); |
660 | if (msg->done) { |
655 | if (msg->done) { |
661 | futex_up(&async_futex); |
656 | futex_up(&async_futex); |
662 | goto done; |
657 | goto done; |
663 | } |
658 | } |
664 | 659 | ||
665 | msg->wdata.ptid = psthread_get_id(); |
660 | msg->wdata.ptid = psthread_get_id(); |
666 | msg->wdata.active = 0; |
661 | msg->wdata.active = 0; |
667 | msg->wdata.inlist = 0; |
662 | msg->wdata.inlist = 0; |
668 | /* Leave locked async_futex when entering this function */ |
663 | /* Leave locked async_futex when entering this function */ |
669 | psthread_schedule_next_adv(PS_TO_MANAGER); |
664 | psthread_schedule_next_adv(PS_TO_MANAGER); |
670 | /* futex is up automatically after psthread_schedule_next...*/ |
665 | /* futex is up automatically after psthread_schedule_next...*/ |
671 | done: |
666 | done: |
672 | if (retval) |
667 | if (retval) |
673 | *retval = msg->retval; |
668 | *retval = msg->retval; |
674 | free(msg); |
669 | free(msg); |
675 | } |
670 | } |
676 | 671 | ||
677 | /** Wait for a message sent by async framework with timeout |
672 | /** Wait for a message sent by async framework with timeout |
678 | * |
673 | * |
679 | * @param amsgid Message ID to wait for |
674 | * @param amsgid Message ID to wait for |
680 | * @param retval Pointer to variable where will be stored retval |
675 | * @param retval Pointer to variable where will be stored retval |
681 | * of the answered message. If NULL, it is ignored. |
676 | * of the answered message. If NULL, it is ignored. |
682 | * @param timeout Timeout in usecs |
677 | * @param timeout Timeout in usecs |
683 | * @return 0 on success, ETIMEOUT if timeout expired |
678 | * @return 0 on success, ETIMEOUT if timeout expired |
684 | * |
679 | * |
685 | */ |
680 | */ |
686 | int async_wait_timeout(aid_t amsgid, ipcarg_t *retval, suseconds_t timeout) |
681 | int async_wait_timeout(aid_t amsgid, ipcarg_t *retval, suseconds_t timeout) |
687 | { |
682 | { |
688 | amsg_t *msg = (amsg_t *) amsgid; |
683 | amsg_t *msg = (amsg_t *) amsgid; |
689 | connection_t *conn; |
684 | connection_t *conn; |
690 | 685 | ||
691 | /* TODO: Let it go through the event read at least once */ |
686 | /* TODO: Let it go through the event read at least once */ |
692 | if (timeout < 0) |
687 | if (timeout < 0) |
693 | return ETIMEOUT; |
688 | return ETIMEOUT; |
694 | 689 | ||
695 | futex_down(&async_futex); |
690 | futex_down(&async_futex); |
696 | if (msg->done) { |
691 | if (msg->done) { |
697 | futex_up(&async_futex); |
692 | futex_up(&async_futex); |
698 | goto done; |
693 | goto done; |
699 | } |
694 | } |
700 | 695 | ||
701 | gettimeofday(&msg->wdata.expires, NULL); |
696 | gettimeofday(&msg->wdata.expires, NULL); |
702 | tv_add(&msg->wdata.expires, timeout); |
697 | tv_add(&msg->wdata.expires, timeout); |
703 | 698 | ||
704 | msg->wdata.ptid = psthread_get_id(); |
699 | msg->wdata.ptid = psthread_get_id(); |
705 | msg->wdata.active = 0; |
700 | msg->wdata.active = 0; |
706 | msg->wdata.inlist = 1; |
701 | msg->wdata.inlist = 1; |
707 | 702 | ||
708 | insert_timeout(&msg->wdata); |
703 | insert_timeout(&msg->wdata); |
709 | 704 | ||
710 | /* Leave locked async_futex when entering this function */ |
705 | /* Leave locked async_futex when entering this function */ |
711 | psthread_schedule_next_adv(PS_TO_MANAGER); |
706 | psthread_schedule_next_adv(PS_TO_MANAGER); |
712 | /* futex is up automatically after psthread_schedule_next...*/ |
707 | /* futex is up automatically after psthread_schedule_next...*/ |
713 | 708 | ||
714 | if (!msg->done) |
709 | if (!msg->done) |
715 | return ETIMEOUT; |
710 | return ETIMEOUT; |
716 | 711 | ||
717 | done: |
712 | done: |
718 | if (retval) |
713 | if (retval) |
719 | *retval = msg->retval; |
714 | *retval = msg->retval; |
720 | free(msg); |
715 | free(msg); |
721 | 716 | ||
722 | return 0; |
717 | return 0; |
723 | } |
718 | } |
724 | 719 | ||
725 | /** Wait specified time, but in the meantime handle incoming events |
720 | /** Wait specified time, but in the meantime handle incoming events |
726 | * |
721 | * |
727 | * @param timeout Time in microseconds to wait |
722 | * @param timeout Time in microseconds to wait |
728 | */ |
723 | */ |
729 | void async_usleep(suseconds_t timeout) |
724 | void async_usleep(suseconds_t timeout) |
730 | { |
725 | { |
731 | amsg_t *msg; |
726 | amsg_t *msg; |
732 | 727 | ||
733 | msg = malloc(sizeof(*msg)); |
728 | msg = malloc(sizeof(*msg)); |
734 | if (!msg) |
729 | if (!msg) |
735 | return; |
730 | return; |
736 | 731 | ||
737 | msg->wdata.ptid = psthread_get_id(); |
732 | msg->wdata.ptid = psthread_get_id(); |
738 | msg->wdata.inlist = 1; |
733 | msg->wdata.inlist = 1; |
739 | msg->wdata.active = 0; |
734 | msg->wdata.active = 0; |
740 | 735 | ||
741 | gettimeofday(&msg->wdata.expires, NULL); |
736 | gettimeofday(&msg->wdata.expires, NULL); |
742 | tv_add(&msg->wdata.expires, timeout); |
737 | tv_add(&msg->wdata.expires, timeout); |
743 | 738 | ||
744 | futex_down(&async_futex); |
739 | futex_down(&async_futex); |
745 | insert_timeout(&msg->wdata); |
740 | insert_timeout(&msg->wdata); |
746 | /* Leave locked async_futex when entering this function */ |
741 | /* Leave locked async_futex when entering this function */ |
747 | psthread_schedule_next_adv(PS_TO_MANAGER); |
742 | psthread_schedule_next_adv(PS_TO_MANAGER); |
748 | /* futex is up automatically after psthread_schedule_next...*/ |
743 | /* futex is up automatically after psthread_schedule_next...*/ |
749 | free(msg); |
744 | free(msg); |
750 | } |
745 | } |
751 | 746 | ||
752 | /** Set function that is called, IPC_M_CONNECT_ME_TO is received |
747 | /** Set function that is called, IPC_M_CONNECT_ME_TO is received |
753 | * |
748 | * |
754 | * @param conn Function that will form new psthread. |
749 | * @param conn Function that will form new psthread. |
755 | */ |
750 | */ |
756 | void async_set_client_connection(async_client_conn_t conn) |
751 | void async_set_client_connection(async_client_conn_t conn) |
757 | { |
752 | { |
758 | client_connection = conn; |
753 | client_connection = conn; |
759 | } |
754 | } |
- | 755 | void async_set_interrupt_received(async_client_conn_t conn) |
|
- | 756 | { |
|
- | 757 | interrupt_received = conn; |
|
- | 758 | } |
|
760 | 759 |