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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 async_client_conn_t client_connection = default_client_connection; |
141 | static async_client_conn_t client_connection = default_client_connection; |
142 | 142 | ||
143 | /** Add microseconds to give timeval */ |
143 | /** Add microseconds to give timeval */ |
144 | static void tv_add(struct timeval *tv, suseconds_t usecs) |
144 | static void tv_add(struct timeval *tv, suseconds_t usecs) |
145 | { |
145 | { |
146 | tv->tv_sec += usecs / 1000000; |
146 | tv->tv_sec += usecs / 1000000; |
147 | tv->tv_usec += usecs % 1000000; |
147 | tv->tv_usec += usecs % 1000000; |
148 | if (tv->tv_usec > 1000000) { |
148 | if (tv->tv_usec > 1000000) { |
149 | tv->tv_sec++; |
149 | tv->tv_sec++; |
150 | tv->tv_usec -= 1000000; |
150 | tv->tv_usec -= 1000000; |
151 | } |
151 | } |
152 | } |
152 | } |
153 | 153 | ||
154 | /** Subtract 2 timevals, return microseconds difference */ |
154 | /** Subtract 2 timevals, return microseconds difference */ |
155 | static suseconds_t tv_sub(struct timeval *tv1, struct timeval *tv2) |
155 | static suseconds_t tv_sub(struct timeval *tv1, struct timeval *tv2) |
156 | { |
156 | { |
157 | suseconds_t result; |
157 | suseconds_t result; |
158 | 158 | ||
159 | result = tv1->tv_usec - tv2->tv_usec; |
159 | result = tv1->tv_usec - tv2->tv_usec; |
160 | result += (tv1->tv_sec - tv2->tv_sec) * 1000000; |
160 | result += (tv1->tv_sec - tv2->tv_sec) * 1000000; |
161 | 161 | ||
162 | return result; |
162 | return result; |
163 | } |
163 | } |
164 | 164 | ||
165 | /** Compare timeval |
165 | /** Compare timeval |
166 | * |
166 | * |
167 | * @return 1 if tv1 > tv2, otherwise 0 |
167 | * @return 1 if tv1 > tv2, otherwise 0 |
168 | */ |
168 | */ |
169 | static int tv_gt(struct timeval *tv1, struct timeval *tv2) |
169 | static int tv_gt(struct timeval *tv1, struct timeval *tv2) |
170 | { |
170 | { |
171 | if (tv1->tv_sec > tv2->tv_sec) |
171 | if (tv1->tv_sec > tv2->tv_sec) |
172 | return 1; |
172 | return 1; |
173 | if (tv1->tv_sec == tv2->tv_sec && tv1->tv_usec > tv2->tv_usec) |
173 | if (tv1->tv_sec == tv2->tv_sec && tv1->tv_usec > tv2->tv_usec) |
174 | return 1; |
174 | return 1; |
175 | return 0; |
175 | return 0; |
176 | } |
176 | } |
177 | static int tv_gteq(struct timeval *tv1, struct timeval *tv2) |
177 | static int tv_gteq(struct timeval *tv1, struct timeval *tv2) |
178 | { |
178 | { |
179 | if (tv1->tv_sec > tv2->tv_sec) |
179 | if (tv1->tv_sec > tv2->tv_sec) |
180 | return 1; |
180 | return 1; |
181 | if (tv1->tv_sec == tv2->tv_sec && tv1->tv_usec >= tv2->tv_usec) |
181 | if (tv1->tv_sec == tv2->tv_sec && tv1->tv_usec >= tv2->tv_usec) |
182 | return 1; |
182 | return 1; |
183 | return 0; |
183 | return 0; |
184 | } |
184 | } |
185 | 185 | ||
186 | /* Hash table functions */ |
186 | /* Hash table functions */ |
187 | #define CONN_HASH_TABLE_CHAINS 32 |
187 | #define CONN_HASH_TABLE_CHAINS 32 |
188 | 188 | ||
189 | static hash_index_t conn_hash(unsigned long *key) |
189 | static hash_index_t conn_hash(unsigned long *key) |
190 | { |
190 | { |
191 | assert(key); |
191 | assert(key); |
192 | return ((*key) >> 4) % CONN_HASH_TABLE_CHAINS; |
192 | return ((*key) >> 4) % CONN_HASH_TABLE_CHAINS; |
193 | } |
193 | } |
194 | 194 | ||
195 | static int conn_compare(unsigned long key[], hash_count_t keys, link_t *item) |
195 | static int conn_compare(unsigned long key[], hash_count_t keys, link_t *item) |
196 | { |
196 | { |
197 | connection_t *hs; |
197 | connection_t *hs; |
198 | 198 | ||
199 | hs = hash_table_get_instance(item, connection_t, link); |
199 | hs = hash_table_get_instance(item, connection_t, link); |
200 | 200 | ||
201 | return key[0] == hs->in_phone_hash; |
201 | return key[0] == hs->in_phone_hash; |
202 | } |
202 | } |
203 | 203 | ||
204 | static void conn_remove(link_t *item) |
204 | static void conn_remove(link_t *item) |
205 | { |
205 | { |
206 | free(hash_table_get_instance(item, connection_t, link)); |
206 | free(hash_table_get_instance(item, connection_t, link)); |
207 | } |
207 | } |
208 | 208 | ||
209 | 209 | ||
210 | /** Operations for NS hash table. */ |
210 | /** Operations for NS hash table. */ |
211 | static hash_table_operations_t conn_hash_table_ops = { |
211 | static hash_table_operations_t conn_hash_table_ops = { |
212 | .hash = conn_hash, |
212 | .hash = conn_hash, |
213 | .compare = conn_compare, |
213 | .compare = conn_compare, |
214 | .remove_callback = conn_remove |
214 | .remove_callback = conn_remove |
215 | }; |
215 | }; |
216 | 216 | ||
217 | /** Insert sort timeout msg into timeouts list |
217 | /** Insert sort timeout msg into timeouts list |
218 | * |
218 | * |
219 | */ |
219 | */ |
220 | static void insert_timeout(awaiter_t *wd) |
220 | static void insert_timeout(awaiter_t *wd) |
221 | { |
221 | { |
222 | link_t *tmp; |
222 | link_t *tmp; |
223 | awaiter_t *cur; |
223 | awaiter_t *cur; |
224 | 224 | ||
225 | wd->timedout = 0; |
225 | wd->timedout = 0; |
226 | 226 | ||
227 | tmp = timeout_list.next; |
227 | tmp = timeout_list.next; |
228 | while (tmp != &timeout_list) { |
228 | while (tmp != &timeout_list) { |
229 | cur = list_get_instance(tmp, awaiter_t, link); |
229 | cur = list_get_instance(tmp, awaiter_t, link); |
230 | if (tv_gteq(&cur->expires, &wd->expires)) |
230 | if (tv_gteq(&cur->expires, &wd->expires)) |
231 | break; |
231 | break; |
232 | tmp = tmp->next; |
232 | tmp = tmp->next; |
233 | } |
233 | } |
234 | list_append(&wd->link, tmp); |
234 | list_append(&wd->link, tmp); |
235 | } |
235 | } |
236 | 236 | ||
237 | /*************************************************/ |
237 | /*************************************************/ |
238 | 238 | ||
239 | /** Try to route a call to an appropriate connection thread |
239 | /** Try to route a call to an appropriate connection thread |
240 | * |
240 | * |
241 | */ |
241 | */ |
242 | static int route_call(ipc_callid_t callid, ipc_call_t *call) |
242 | static int route_call(ipc_callid_t callid, ipc_call_t *call) |
243 | { |
243 | { |
244 | connection_t *conn; |
244 | connection_t *conn; |
245 | msg_t *msg; |
245 | msg_t *msg; |
246 | link_t *hlp; |
246 | link_t *hlp; |
247 | unsigned long key; |
247 | unsigned long key; |
248 | 248 | ||
249 | futex_down(&async_futex); |
249 | futex_down(&async_futex); |
250 | 250 | ||
251 | key = call->in_phone_hash; |
251 | key = call->in_phone_hash; |
252 | hlp = hash_table_find(&conn_hash_table, &key); |
252 | hlp = hash_table_find(&conn_hash_table, &key); |
253 | if (!hlp) { |
253 | if (!hlp) { |
254 | futex_up(&async_futex); |
254 | futex_up(&async_futex); |
255 | return 0; |
255 | return 0; |
256 | } |
256 | } |
257 | conn = hash_table_get_instance(hlp, connection_t, link); |
257 | conn = hash_table_get_instance(hlp, connection_t, link); |
258 | 258 | ||
259 | msg = malloc(sizeof(*msg)); |
259 | msg = malloc(sizeof(*msg)); |
260 | msg->callid = callid; |
260 | msg->callid = callid; |
261 | msg->call = *call; |
261 | msg->call = *call; |
262 | list_append(&msg->link, &conn->msg_queue); |
262 | list_append(&msg->link, &conn->msg_queue); |
263 | 263 | ||
264 | /* If the call is waiting for event, run it */ |
264 | /* If the call is waiting for event, run it */ |
265 | if (!conn->wdata.active) { |
265 | if (!conn->wdata.active) { |
266 | /* If in timeout list, remove it */ |
266 | /* If in timeout list, remove it */ |
267 | if (conn->wdata.inlist) { |
267 | if (conn->wdata.inlist) { |
268 | conn->wdata.inlist = 0; |
268 | conn->wdata.inlist = 0; |
269 | list_remove(&conn->wdata.link); |
269 | list_remove(&conn->wdata.link); |
270 | } |
270 | } |
271 | conn->wdata.active = 1; |
271 | conn->wdata.active = 1; |
272 | psthread_add_ready(conn->wdata.ptid); |
272 | psthread_add_ready(conn->wdata.ptid); |
273 | } |
273 | } |
274 | 274 | ||
275 | futex_up(&async_futex); |
275 | futex_up(&async_futex); |
276 | 276 | ||
277 | return 1; |
277 | return 1; |
278 | } |
278 | } |
279 | 279 | ||
280 | /** Return new incoming message for current(thread-local) connection */ |
280 | /** Return new incoming message for current(thread-local) connection */ |
281 | ipc_callid_t async_get_call_timeout(ipc_call_t *call, suseconds_t usecs) |
281 | ipc_callid_t async_get_call_timeout(ipc_call_t *call, suseconds_t usecs) |
282 | { |
282 | { |
283 | msg_t *msg; |
283 | msg_t *msg; |
284 | ipc_callid_t callid; |
284 | ipc_callid_t callid; |
285 | connection_t *conn; |
285 | connection_t *conn; |
286 | 286 | ||
287 | assert(PS_connection); |
287 | assert(PS_connection); |
288 | /* GCC 4.1.0 coughs on PS_connection-> dereference, |
288 | /* GCC 4.1.0 coughs on PS_connection-> dereference, |
289 | * GCC 4.1.1 happilly puts the rdhwr instruction in delay slot. |
289 | * GCC 4.1.1 happilly puts the rdhwr instruction in delay slot. |
290 | * I would never expect to find so many errors in |
290 | * I would never expect to find so many errors in |
291 | * compiler *($&$(*&$ |
291 | * compiler *($&$(*&$ |
292 | */ |
292 | */ |
293 | conn = PS_connection; |
293 | conn = PS_connection; |
294 | 294 | ||
295 | if (usecs < 0) /* TODO: let it get through the ipc_call once */ |
295 | if (usecs < 0) /* TODO: let it get through the ipc_call once */ |
296 | return 0; |
296 | return 0; |
297 | 297 | ||
298 | futex_down(&async_futex); |
298 | futex_down(&async_futex); |
299 | 299 | ||
300 | if (usecs) { |
300 | if (usecs) { |
301 | gettimeofday(&conn->wdata.expires, NULL); |
301 | gettimeofday(&conn->wdata.expires, NULL); |
302 | tv_add(&conn->wdata.expires, usecs); |
302 | tv_add(&conn->wdata.expires, usecs); |
303 | } else { |
303 | } else { |
304 | conn->wdata.inlist = 0; |
304 | conn->wdata.inlist = 0; |
305 | } |
305 | } |
306 | /* If nothing in queue, wait until something appears */ |
306 | /* If nothing in queue, wait until something appears */ |
307 | while (list_empty(&conn->msg_queue)) { |
307 | while (list_empty(&conn->msg_queue)) { |
308 | if (usecs) { |
308 | if (usecs) { |
309 | conn->wdata.inlist = 1; |
309 | conn->wdata.inlist = 1; |
310 | insert_timeout(&conn->wdata); |
310 | insert_timeout(&conn->wdata); |
311 | } |
311 | } |
312 | conn->wdata.active = 0; |
312 | conn->wdata.active = 0; |
313 | psthread_schedule_next_adv(PS_TO_MANAGER); |
313 | psthread_schedule_next_adv(PS_TO_MANAGER); |
314 | /* Futex is up after getting back from async_manager |
314 | /* Futex is up after getting back from async_manager |
315 | * get it again */ |
315 | * get it again */ |
316 | futex_down(&async_futex); |
316 | futex_down(&async_futex); |
317 | if (usecs && conn->wdata.timedout && \ |
317 | if (usecs && conn->wdata.timedout && \ |
318 | list_empty(&conn->msg_queue)) { |
318 | list_empty(&conn->msg_queue)) { |
319 | /* If we timed out-> exit */ |
319 | /* If we timed out-> exit */ |
320 | futex_up(&async_futex); |
320 | futex_up(&async_futex); |
321 | return 0; |
321 | return 0; |
322 | } |
322 | } |
323 | } |
323 | } |
324 | 324 | ||
325 | msg = list_get_instance(conn->msg_queue.next, msg_t, link); |
325 | msg = list_get_instance(conn->msg_queue.next, msg_t, link); |
326 | list_remove(&msg->link); |
326 | list_remove(&msg->link); |
327 | callid = msg->callid; |
327 | callid = msg->callid; |
328 | *call = msg->call; |
328 | *call = msg->call; |
329 | free(msg); |
329 | free(msg); |
330 | 330 | ||
331 | futex_up(&async_futex); |
331 | futex_up(&async_futex); |
332 | return callid; |
332 | return callid; |
333 | } |
333 | } |
334 | 334 | ||
335 | /** Thread function that gets created on new connection |
335 | /** Thread function that gets created on new connection |
336 | * |
336 | * |
337 | * This function is defined as a weak symbol - to be redefined in |
337 | * This function is defined as a weak symbol - to be redefined in |
338 | * user code. |
338 | * user code. |
339 | */ |
339 | */ |
340 | static void default_client_connection(ipc_callid_t callid, ipc_call_t *call) |
340 | static void default_client_connection(ipc_callid_t callid, ipc_call_t *call) |
341 | { |
341 | { |
342 | ipc_answer_fast(callid, ENOENT, 0, 0); |
342 | ipc_answer_fast(callid, ENOENT, 0, 0); |
343 | } |
343 | } |
344 | 344 | ||
345 | /** Function that gets called on interrupt receival |
345 | /** Function that gets called on interrupt receival |
346 | * |
346 | * |
347 | * This function is defined as a weak symbol - to be redefined in |
347 | * This function is defined as a weak symbol - to be redefined in |
348 | * user code. |
348 | * user code. |
349 | */ |
349 | */ |
350 | void interrupt_received(ipc_call_t *call) |
350 | void interrupt_received(ipc_call_t *call) |
351 | { |
351 | { |
352 | } |
352 | } |
353 | 353 | ||
354 | 354 | ||
355 | /** Wrapper for client connection thread |
355 | /** Wrapper for client connection thread |
356 | * |
356 | * |
357 | * When new connection arrives, thread with this function is created. |
357 | * When new connection arrives, thread with this function is created. |
358 | * It calls client_connection and does final cleanup. |
358 | * It calls client_connection and does final cleanup. |
359 | * |
359 | * |
360 | * @parameter arg Connection structure pointer |
360 | * @parameter arg Connection structure pointer |
361 | */ |
361 | */ |
362 | static int connection_thread(void *arg) |
362 | static int connection_thread(void *arg) |
363 | { |
363 | { |
364 | unsigned long key; |
364 | unsigned long key; |
365 | msg_t *msg; |
365 | msg_t *msg; |
366 | 366 | ||
367 | /* Setup thread local connection pointer */ |
367 | /* Setup thread local connection pointer */ |
368 | PS_connection = (connection_t *)arg; |
368 | PS_connection = (connection_t *)arg; |
369 | PS_connection->cthread(PS_connection->callid, &PS_connection->call); |
369 | PS_connection->cthread(PS_connection->callid, &PS_connection->call); |
370 | 370 | ||
371 | /* Remove myself from connection hash table */ |
371 | /* Remove myself from connection hash table */ |
372 | futex_down(&async_futex); |
372 | futex_down(&async_futex); |
373 | key = PS_connection->in_phone_hash; |
373 | key = PS_connection->in_phone_hash; |
374 | hash_table_remove(&conn_hash_table, &key, 1); |
374 | hash_table_remove(&conn_hash_table, &key, 1); |
375 | futex_up(&async_futex); |
375 | futex_up(&async_futex); |
376 | /* Answer all remaining messages with ehangup */ |
376 | /* Answer all remaining messages with ehangup */ |
377 | while (!list_empty(&PS_connection->msg_queue)) { |
377 | while (!list_empty(&PS_connection->msg_queue)) { |
378 | msg = list_get_instance(PS_connection->msg_queue.next, msg_t, link); |
378 | msg = list_get_instance(PS_connection->msg_queue.next, msg_t, link); |
379 | list_remove(&msg->link); |
379 | list_remove(&msg->link); |
380 | ipc_answer_fast(msg->callid, EHANGUP, 0, 0); |
380 | ipc_answer_fast(msg->callid, EHANGUP, 0, 0); |
381 | free(msg); |
381 | free(msg); |
382 | } |
382 | } |
383 | } |
383 | } |
384 | 384 | ||
385 | /** Create new thread for a new connection |
385 | /** Create new thread for a new connection |
386 | * |
386 | * |
387 | * Creates new thread for connection, fills in connection |
387 | * Creates new thread for connection, fills in connection |
388 | * structures and inserts it into the hash table, so that |
388 | * structures and inserts it into the hash table, so that |
389 | * later we can easily do routing of messages to particular |
389 | * later we can easily do routing of messages to particular |
390 | * threads. |
390 | * threads. |
391 | * |
391 | * |
392 | * @param in_phone_hash Identification of the incoming connection |
392 | * @param in_phone_hash Identification of the incoming connection |
393 | * @param callid Callid of the IPC_M_CONNECT_ME_TO packet |
393 | * @param callid Callid of the IPC_M_CONNECT_ME_TO packet |
394 | * @param call Call data of the opening packet |
394 | * @param call Call data of the opening packet |
395 | * @param cthread Thread function that should be called upon |
395 | * @param cthread Thread function that should be called upon |
396 | * opening the connection |
396 | * opening the connection |
397 | * @return New thread id |
397 | * @return New thread id |
398 | */ |
398 | */ |
399 | pstid_t async_new_connection(ipcarg_t in_phone_hash,ipc_callid_t callid, |
399 | pstid_t async_new_connection(ipcarg_t in_phone_hash,ipc_callid_t callid, |
400 | ipc_call_t *call, |
400 | ipc_call_t *call, |
401 | void (*cthread)(ipc_callid_t,ipc_call_t *)) |
401 | void (*cthread)(ipc_callid_t,ipc_call_t *)) |
402 | { |
402 | { |
403 | pstid_t ptid; |
403 | pstid_t ptid; |
404 | connection_t *conn; |
404 | connection_t *conn; |
405 | unsigned long key; |
405 | unsigned long key; |
406 | 406 | ||
407 | conn = malloc(sizeof(*conn)); |
407 | conn = malloc(sizeof(*conn)); |
408 | if (!conn) { |
408 | if (!conn) { |
409 | ipc_answer_fast(callid, ENOMEM, 0, 0); |
409 | ipc_answer_fast(callid, ENOMEM, 0, 0); |
410 | return NULL; |
410 | return NULL; |
411 | } |
411 | } |
412 | conn->in_phone_hash = in_phone_hash; |
412 | conn->in_phone_hash = in_phone_hash; |
413 | list_initialize(&conn->msg_queue); |
413 | list_initialize(&conn->msg_queue); |
414 | conn->callid = callid; |
414 | conn->callid = callid; |
415 | if (call) |
415 | if (call) |
416 | conn->call = *call; |
416 | conn->call = *call; |
417 | conn->wdata.active = 1; /* We will activate it asap */ |
417 | conn->wdata.active = 1; /* We will activate it asap */ |
418 | conn->cthread = cthread; |
418 | conn->cthread = cthread; |
419 | 419 | ||
420 | conn->wdata.ptid = psthread_create(connection_thread, conn); |
420 | conn->wdata.ptid = psthread_create(connection_thread, conn); |
421 | if (!conn->wdata.ptid) { |
421 | if (!conn->wdata.ptid) { |
422 | free(conn); |
422 | free(conn); |
423 | ipc_answer_fast(callid, ENOMEM, 0, 0); |
423 | ipc_answer_fast(callid, ENOMEM, 0, 0); |
424 | return NULL; |
424 | return NULL; |
425 | } |
425 | } |
426 | /* Add connection to hash table */ |
426 | /* Add connection to hash table */ |
427 | key = conn->in_phone_hash; |
427 | key = conn->in_phone_hash; |
428 | futex_down(&async_futex); |
428 | futex_down(&async_futex); |
429 | hash_table_insert(&conn_hash_table, &key, &conn->link); |
429 | hash_table_insert(&conn_hash_table, &key, &conn->link); |
430 | futex_up(&async_futex); |
430 | futex_up(&async_futex); |
431 | 431 | ||
432 | psthread_add_ready(conn->wdata.ptid); |
432 | psthread_add_ready(conn->wdata.ptid); |
433 | 433 | ||
434 | return conn->wdata.ptid; |
434 | return conn->wdata.ptid; |
435 | } |
435 | } |
436 | 436 | ||
437 | /** Handle call that was received */ |
437 | /** Handle call that was received */ |
438 | static void handle_call(ipc_callid_t callid, ipc_call_t *call) |
438 | static void handle_call(ipc_callid_t callid, ipc_call_t *call) |
439 | { |
439 | { |
440 | /* Unrouted call - do some default behaviour */ |
440 | /* Unrouted call - do some default behaviour */ |
441 | switch (IPC_GET_METHOD(*call)) { |
441 | switch (IPC_GET_METHOD(*call)) { |
442 | case IPC_M_INTERRUPT: |
442 | case IPC_M_INTERRUPT: |
443 | interrupt_received(call); |
443 | interrupt_received(call); |
444 | return; |
444 | return; |
445 | case IPC_M_CONNECT_ME_TO: |
445 | case IPC_M_CONNECT_ME_TO: |
446 | /* Open new connection with thread etc. */ |
446 | /* Open new connection with thread etc. */ |
447 | async_new_connection(IPC_GET_ARG3(*call), callid, call, client_connection); |
447 | async_new_connection(IPC_GET_ARG3(*call), callid, call, client_connection); |
448 | return; |
448 | return; |
449 | } |
449 | } |
450 | 450 | ||
451 | /* Try to route call through connection tables */ |
451 | /* Try to route call through connection tables */ |
452 | if (route_call(callid, call)) |
452 | if (route_call(callid, call)) |
453 | return; |
453 | return; |
454 | 454 | ||
455 | /* Unknown call from unknown phone - hang it up */ |
455 | /* Unknown call from unknown phone - hang it up */ |
456 | ipc_answer_fast(callid, EHANGUP, 0, 0); |
456 | ipc_answer_fast(callid, EHANGUP, 0, 0); |
457 | } |
457 | } |
458 | 458 | ||
459 | /** Fire all timeouts that expired |
459 | /** Fire all timeouts that expired |
460 | * |
460 | * |
461 | */ |
461 | */ |
462 | static void handle_expired_timeouts(void) |
462 | static void handle_expired_timeouts(void) |
463 | { |
463 | { |
464 | struct timeval tv; |
464 | struct timeval tv; |
465 | awaiter_t *waiter; |
465 | awaiter_t *waiter; |
466 | link_t *cur; |
466 | link_t *cur; |
467 | 467 | ||
468 | gettimeofday(&tv,NULL); |
468 | gettimeofday(&tv,NULL); |
469 | futex_down(&async_futex); |
469 | futex_down(&async_futex); |
470 | 470 | ||
471 | cur = timeout_list.next; |
471 | cur = timeout_list.next; |
472 | while (cur != &timeout_list) { |
472 | while (cur != &timeout_list) { |
473 | waiter = list_get_instance(cur,awaiter_t,link); |
473 | waiter = list_get_instance(cur,awaiter_t,link); |
474 | if (tv_gt(&waiter->expires, &tv)) |
474 | if (tv_gt(&waiter->expires, &tv)) |
475 | break; |
475 | break; |
476 | cur = cur->next; |
476 | cur = cur->next; |
477 | list_remove(&waiter->link); |
477 | list_remove(&waiter->link); |
478 | waiter->inlist = 0; |
478 | waiter->inlist = 0; |
479 | waiter->timedout = 1; |
479 | waiter->timedout = 1; |
480 | /* Redundant condition? The thread should not |
480 | /* Redundant condition? The thread should not |
481 | * be active when it gets here. |
481 | * be active when it gets here. |
482 | */ |
482 | */ |
483 | if (!waiter->active) { |
483 | if (!waiter->active) { |
484 | waiter->active = 1; |
484 | waiter->active = 1; |
485 | psthread_add_ready(waiter->ptid); |
485 | psthread_add_ready(waiter->ptid); |
486 | } |
486 | } |
487 | } |
487 | } |
488 | 488 | ||
489 | futex_up(&async_futex); |
489 | futex_up(&async_futex); |
490 | } |
490 | } |
491 | 491 | ||
492 | /** Endless loop dispatching incoming calls and answers */ |
492 | /** Endless loop dispatching incoming calls and answers */ |
493 | int async_manager(void) |
493 | int async_manager(void) |
494 | { |
494 | { |
495 | ipc_call_t call; |
495 | ipc_call_t call; |
496 | ipc_callid_t callid; |
496 | ipc_callid_t callid; |
497 | int timeout; |
497 | int timeout; |
498 | awaiter_t *waiter; |
498 | awaiter_t *waiter; |
499 | struct timeval tv; |
499 | struct timeval tv; |
500 | 500 | ||
501 | while (1) { |
501 | while (1) { |
502 | if (psthread_schedule_next_adv(PS_FROM_MANAGER)) { |
502 | if (psthread_schedule_next_adv(PS_FROM_MANAGER)) { |
503 | futex_up(&async_futex); /* async_futex is always held |
503 | futex_up(&async_futex); /* async_futex is always held |
504 | * when entering manager thread |
504 | * when entering manager thread |
505 | */ |
505 | */ |
506 | continue; |
506 | continue; |
507 | } |
507 | } |
508 | futex_down(&async_futex); |
508 | futex_down(&async_futex); |
509 | if (!list_empty(&timeout_list)) { |
509 | if (!list_empty(&timeout_list)) { |
510 | waiter = list_get_instance(timeout_list.next,awaiter_t,link); |
510 | waiter = list_get_instance(timeout_list.next,awaiter_t,link); |
511 | gettimeofday(&tv,NULL); |
511 | gettimeofday(&tv,NULL); |
512 | if (tv_gteq(&tv, &waiter->expires)) { |
512 | if (tv_gteq(&tv, &waiter->expires)) { |
513 | futex_up(&async_futex); |
513 | futex_up(&async_futex); |
514 | handle_expired_timeouts(); |
514 | handle_expired_timeouts(); |
515 | continue; |
515 | continue; |
516 | } else |
516 | } else |
517 | timeout = tv_sub(&waiter->expires, &tv); |
517 | timeout = tv_sub(&waiter->expires, &tv); |
518 | } else |
518 | } else |
519 | timeout = SYNCH_NO_TIMEOUT; |
519 | timeout = SYNCH_NO_TIMEOUT; |
520 | futex_up(&async_futex); |
520 | futex_up(&async_futex); |
521 | 521 | ||
522 | callid = ipc_wait_cycle(&call, timeout, SYNCH_FLAGS_NONE); |
522 | callid = ipc_wait_cycle(&call, timeout, SYNCH_FLAGS_NONE); |
523 | 523 | ||
524 | if (!callid) { |
524 | if (!callid) { |
525 | handle_expired_timeouts(); |
525 | handle_expired_timeouts(); |
526 | continue; |
526 | continue; |
527 | } |
527 | } |
528 | 528 | ||
529 | if (callid & IPC_CALLID_ANSWERED) |
529 | if (callid & IPC_CALLID_ANSWERED) |
530 | continue; |
530 | continue; |
531 | 531 | ||
532 | handle_call(callid, &call); |
532 | handle_call(callid, &call); |
533 | } |
533 | } |
534 | } |
534 | } |
535 | 535 | ||
536 | /** Function to start async_manager as a standalone thread |
536 | /** Function to start async_manager as a standalone thread |
537 | * |
537 | * |
538 | * When more kernel threads are used, one async manager should |
538 | * When more kernel threads are used, one async manager should |
539 | * exist per thread. The particular implementation may change, |
539 | * exist per thread. The particular implementation may change, |
540 | * currently one async_manager is started automatically per kernel |
540 | * currently one async_manager is started automatically per kernel |
541 | * thread except main thread. |
541 | * thread except main thread. |
542 | */ |
542 | */ |
543 | static int async_manager_thread(void *arg) |
543 | static int async_manager_thread(void *arg) |
544 | { |
544 | { |
545 | futex_up(&async_futex); /* async_futex is always locked when entering |
545 | futex_up(&async_futex); /* async_futex is always locked when entering |
546 | * manager */ |
546 | * manager */ |
547 | async_manager(); |
547 | async_manager(); |
548 | } |
548 | } |
549 | 549 | ||
550 | /** Add one manager to manager list */ |
550 | /** Add one manager to manager list */ |
551 | void async_create_manager(void) |
551 | void async_create_manager(void) |
552 | { |
552 | { |
553 | pstid_t ptid; |
553 | pstid_t ptid; |
554 | 554 | ||
555 | ptid = psthread_create(async_manager_thread, NULL); |
555 | ptid = psthread_create(async_manager_thread, NULL); |
556 | psthread_add_manager(ptid); |
556 | psthread_add_manager(ptid); |
557 | } |
557 | } |
558 | 558 | ||
559 | /** Remove one manager from manager list */ |
559 | /** Remove one manager from manager list */ |
560 | void async_destroy_manager(void) |
560 | void async_destroy_manager(void) |
561 | { |
561 | { |
562 | psthread_remove_manager(); |
562 | psthread_remove_manager(); |
563 | } |
563 | } |
564 | 564 | ||
565 | /** Initialize internal structures needed for async manager */ |
565 | /** Initialize internal structures needed for async manager */ |
566 | int _async_init(void) |
566 | int _async_init(void) |
567 | { |
567 | { |
568 | if (!hash_table_create(&conn_hash_table, CONN_HASH_TABLE_CHAINS, 1, &conn_hash_table_ops)) { |
568 | 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"); |
569 | printf("%s: cannot create hash table\n", "async"); |
570 | return ENOMEM; |
570 | return ENOMEM; |
571 | } |
571 | } |
572 | 572 | ||
573 | } |
573 | } |
574 | 574 | ||
575 | /** IPC handler for messages in async framework |
575 | /** IPC handler for messages in async framework |
576 | * |
576 | * |
577 | * Notify thread that is waiting for this message, that it arrived |
577 | * Notify thread that is waiting for this message, that it arrived |
578 | */ |
578 | */ |
579 | static void reply_received(void *private, int retval, |
579 | static void reply_received(void *private, int retval, |
580 | ipc_call_t *data) |
580 | ipc_call_t *data) |
581 | { |
581 | { |
582 | amsg_t *msg = (amsg_t *) private; |
582 | amsg_t *msg = (amsg_t *) private; |
583 | 583 | ||
584 | msg->retval = retval; |
584 | msg->retval = retval; |
585 | 585 | ||
586 | futex_down(&async_futex); |
586 | futex_down(&async_futex); |
587 | /* Copy data after futex_down, just in case the |
587 | /* Copy data after futex_down, just in case the |
588 | * call was detached |
588 | * call was detached |
589 | */ |
589 | */ |
590 | if (msg->dataptr) |
590 | if (msg->dataptr) |
591 | *msg->dataptr = *data; |
591 | *msg->dataptr = *data; |
592 | 592 | ||
593 | write_barrier(); |
593 | write_barrier(); |
594 | /* Remove message from timeout list */ |
594 | /* Remove message from timeout list */ |
595 | if (msg->wdata.inlist) |
595 | if (msg->wdata.inlist) |
596 | list_remove(&msg->wdata.link); |
596 | list_remove(&msg->wdata.link); |
597 | msg->done = 1; |
597 | msg->done = 1; |
598 | if (! msg->wdata.active) { |
598 | if (! msg->wdata.active) { |
599 | msg->wdata.active = 1; |
599 | msg->wdata.active = 1; |
600 | psthread_add_ready(msg->wdata.ptid); |
600 | psthread_add_ready(msg->wdata.ptid); |
601 | } |
601 | } |
602 | futex_up(&async_futex); |
602 | futex_up(&async_futex); |
603 | } |
603 | } |
604 | 604 | ||
605 | /** Send message and return id of the sent message |
605 | /** Send message and return id of the sent message |
606 | * |
606 | * |
607 | * The return value can be used as input for async_wait() to wait |
607 | * The return value can be used as input for async_wait() to wait |
608 | * for completion. |
608 | * for completion. |
609 | */ |
609 | */ |
610 | aid_t async_send_2(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2, |
610 | aid_t async_send_2(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2, |
611 | ipc_call_t *dataptr) |
611 | ipc_call_t *dataptr) |
612 | { |
612 | { |
613 | amsg_t *msg; |
613 | amsg_t *msg; |
614 | 614 | ||
615 | msg = malloc(sizeof(*msg)); |
615 | msg = malloc(sizeof(*msg)); |
616 | msg->done = 0; |
616 | msg->done = 0; |
617 | msg->dataptr = dataptr; |
617 | msg->dataptr = dataptr; |
618 | 618 | ||
619 | msg->wdata.active = 1; /* We may sleep in next method, but it |
619 | msg->wdata.active = 1; /* We may sleep in next method, but it |
620 | * will use it's own mechanism */ |
620 | * will use it's own mechanism */ |
621 | ipc_call_async_2(phoneid,method,arg1,arg2,msg,reply_received,1); |
621 | ipc_call_async_2(phoneid,method,arg1,arg2,msg,reply_received,1); |
622 | 622 | ||
623 | return (aid_t) msg; |
623 | return (aid_t) msg; |
624 | } |
624 | } |
625 | 625 | ||
- | 626 | /** Send message and return id of the sent message |
|
- | 627 | * |
|
- | 628 | * The return value can be used as input for async_wait() to wait |
|
- | 629 | * for completion. |
|
- | 630 | */ |
|
- | 631 | aid_t async_send_3(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2, |
|
- | 632 | ipcarg_t arg3, ipc_call_t *dataptr) |
|
- | 633 | { |
|
- | 634 | amsg_t *msg; |
|
- | 635 | ||
- | 636 | msg = malloc(sizeof(*msg)); |
|
- | 637 | msg->done = 0; |
|
- | 638 | msg->dataptr = dataptr; |
|
- | 639 | ||
- | 640 | msg->wdata.active = 1; /* We may sleep in next method, but it |
|
- | 641 | * will use it's own mechanism */ |
|
- | 642 | ipc_call_async_3(phoneid,method,arg1,arg2,arg3, msg,reply_received,1); |
|
- | 643 | ||
- | 644 | return (aid_t) msg; |
|
- | 645 | } |
|
- | 646 | ||
626 | /** Wait for a message sent by async framework |
647 | /** Wait for a message sent by async framework |
627 | * |
648 | * |
628 | * @param amsgid Message ID to wait for |
649 | * @param amsgid Message ID to wait for |
629 | * @param retval Pointer to variable where will be stored retval |
650 | * @param retval Pointer to variable where will be stored retval |
630 | * of the answered message. If NULL, it is ignored. |
651 | * of the answered message. If NULL, it is ignored. |
631 | * |
652 | * |
632 | */ |
653 | */ |
633 | void async_wait_for(aid_t amsgid, ipcarg_t *retval) |
654 | void async_wait_for(aid_t amsgid, ipcarg_t *retval) |
634 | { |
655 | { |
635 | amsg_t *msg = (amsg_t *) amsgid; |
656 | amsg_t *msg = (amsg_t *) amsgid; |
636 | connection_t *conn; |
657 | connection_t *conn; |
637 | 658 | ||
638 | futex_down(&async_futex); |
659 | futex_down(&async_futex); |
639 | if (msg->done) { |
660 | if (msg->done) { |
640 | futex_up(&async_futex); |
661 | futex_up(&async_futex); |
641 | goto done; |
662 | goto done; |
642 | } |
663 | } |
643 | 664 | ||
644 | msg->wdata.ptid = psthread_get_id(); |
665 | msg->wdata.ptid = psthread_get_id(); |
645 | msg->wdata.active = 0; |
666 | msg->wdata.active = 0; |
646 | msg->wdata.inlist = 0; |
667 | msg->wdata.inlist = 0; |
647 | /* Leave locked async_futex when entering this function */ |
668 | /* Leave locked async_futex when entering this function */ |
648 | psthread_schedule_next_adv(PS_TO_MANAGER); |
669 | psthread_schedule_next_adv(PS_TO_MANAGER); |
649 | /* futex is up automatically after psthread_schedule_next...*/ |
670 | /* futex is up automatically after psthread_schedule_next...*/ |
650 | done: |
671 | done: |
651 | if (retval) |
672 | if (retval) |
652 | *retval = msg->retval; |
673 | *retval = msg->retval; |
653 | free(msg); |
674 | free(msg); |
654 | } |
675 | } |
655 | 676 | ||
656 | /** Wait for a message sent by async framework with timeout |
677 | /** Wait for a message sent by async framework with timeout |
657 | * |
678 | * |
658 | * @param amsgid Message ID to wait for |
679 | * @param amsgid Message ID to wait for |
659 | * @param retval Pointer to variable where will be stored retval |
680 | * @param retval Pointer to variable where will be stored retval |
660 | * of the answered message. If NULL, it is ignored. |
681 | * of the answered message. If NULL, it is ignored. |
661 | * @param timeout Timeout in usecs |
682 | * @param timeout Timeout in usecs |
662 | * @return 0 on success, ETIMEOUT if timeout expired |
683 | * @return 0 on success, ETIMEOUT if timeout expired |
663 | * |
684 | * |
664 | */ |
685 | */ |
665 | int async_wait_timeout(aid_t amsgid, ipcarg_t *retval, suseconds_t timeout) |
686 | int async_wait_timeout(aid_t amsgid, ipcarg_t *retval, suseconds_t timeout) |
666 | { |
687 | { |
667 | amsg_t *msg = (amsg_t *) amsgid; |
688 | amsg_t *msg = (amsg_t *) amsgid; |
668 | connection_t *conn; |
689 | connection_t *conn; |
669 | 690 | ||
670 | /* TODO: Let it go through the event read at least once */ |
691 | /* TODO: Let it go through the event read at least once */ |
671 | if (timeout < 0) |
692 | if (timeout < 0) |
672 | return ETIMEOUT; |
693 | return ETIMEOUT; |
673 | 694 | ||
674 | futex_down(&async_futex); |
695 | futex_down(&async_futex); |
675 | if (msg->done) { |
696 | if (msg->done) { |
676 | futex_up(&async_futex); |
697 | futex_up(&async_futex); |
677 | goto done; |
698 | goto done; |
678 | } |
699 | } |
679 | 700 | ||
680 | gettimeofday(&msg->wdata.expires, NULL); |
701 | gettimeofday(&msg->wdata.expires, NULL); |
681 | tv_add(&msg->wdata.expires, timeout); |
702 | tv_add(&msg->wdata.expires, timeout); |
682 | 703 | ||
683 | msg->wdata.ptid = psthread_get_id(); |
704 | msg->wdata.ptid = psthread_get_id(); |
684 | msg->wdata.active = 0; |
705 | msg->wdata.active = 0; |
685 | msg->wdata.inlist = 1; |
706 | msg->wdata.inlist = 1; |
686 | 707 | ||
687 | insert_timeout(&msg->wdata); |
708 | insert_timeout(&msg->wdata); |
688 | 709 | ||
689 | /* Leave locked async_futex when entering this function */ |
710 | /* Leave locked async_futex when entering this function */ |
690 | psthread_schedule_next_adv(PS_TO_MANAGER); |
711 | psthread_schedule_next_adv(PS_TO_MANAGER); |
691 | /* futex is up automatically after psthread_schedule_next...*/ |
712 | /* futex is up automatically after psthread_schedule_next...*/ |
692 | 713 | ||
693 | if (!msg->done) |
714 | if (!msg->done) |
694 | return ETIMEOUT; |
715 | return ETIMEOUT; |
695 | 716 | ||
696 | done: |
717 | done: |
697 | if (retval) |
718 | if (retval) |
698 | *retval = msg->retval; |
719 | *retval = msg->retval; |
699 | free(msg); |
720 | free(msg); |
700 | 721 | ||
701 | return 0; |
722 | return 0; |
702 | } |
723 | } |
703 | 724 | ||
704 | /** Wait specified time, but in the meantime handle incoming events |
725 | /** Wait specified time, but in the meantime handle incoming events |
705 | * |
726 | * |
706 | * @param timeout Time in microseconds to wait |
727 | * @param timeout Time in microseconds to wait |
707 | */ |
728 | */ |
708 | void async_usleep(suseconds_t timeout) |
729 | void async_usleep(suseconds_t timeout) |
709 | { |
730 | { |
710 | amsg_t *msg; |
731 | amsg_t *msg; |
711 | 732 | ||
712 | msg = malloc(sizeof(*msg)); |
733 | msg = malloc(sizeof(*msg)); |
713 | if (!msg) |
734 | if (!msg) |
714 | return; |
735 | return; |
715 | 736 | ||
716 | msg->wdata.ptid = psthread_get_id(); |
737 | msg->wdata.ptid = psthread_get_id(); |
717 | msg->wdata.inlist = 1; |
738 | msg->wdata.inlist = 1; |
718 | msg->wdata.active = 0; |
739 | msg->wdata.active = 0; |
719 | 740 | ||
720 | gettimeofday(&msg->wdata.expires, NULL); |
741 | gettimeofday(&msg->wdata.expires, NULL); |
721 | tv_add(&msg->wdata.expires, timeout); |
742 | tv_add(&msg->wdata.expires, timeout); |
722 | 743 | ||
723 | futex_down(&async_futex); |
744 | futex_down(&async_futex); |
724 | insert_timeout(&msg->wdata); |
745 | insert_timeout(&msg->wdata); |
725 | /* Leave locked async_futex when entering this function */ |
746 | /* Leave locked async_futex when entering this function */ |
726 | psthread_schedule_next_adv(PS_TO_MANAGER); |
747 | psthread_schedule_next_adv(PS_TO_MANAGER); |
727 | /* futex is up automatically after psthread_schedule_next...*/ |
748 | /* futex is up automatically after psthread_schedule_next...*/ |
728 | free(msg); |
749 | free(msg); |
729 | } |
750 | } |
730 | 751 | ||
731 | /** Set function that is called, IPC_M_CONNECT_ME_TO is received |
752 | /** Set function that is called, IPC_M_CONNECT_ME_TO is received |
732 | * |
753 | * |
733 | * @param conn Function that will form new psthread. |
754 | * @param conn Function that will form new psthread. |
734 | */ |
755 | */ |
735 | void async_set_client_connection(async_client_conn_t conn) |
756 | void async_set_client_connection(async_client_conn_t conn) |
736 | { |
757 | { |
737 | client_connection = conn; |
758 | client_connection = conn; |
738 | } |
759 | } |
739 | 760 |