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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 | */ |
|
- | 28 | ||
- | 29 | /** @addtogroup libc |
|
- | 30 | * @{ |
|
- | 31 | */ |
|
- | 32 | /** @file |
|
27 | */ |
33 | */ |
28 | 34 | ||
29 | /** |
35 | /** |
30 | * Asynchronous library |
36 | * Asynchronous library |
31 | * |
37 | * |
32 | * The aim of this library is facilitating writing programs utilizing |
38 | * The aim of this library is facilitating writing programs utilizing |
33 | * the asynchronous nature of Helenos IPC, yet using a normal way |
39 | * the asynchronous nature of Helenos IPC, yet using a normal way |
34 | * of programming. |
40 | * of programming. |
35 | * |
41 | * |
36 | * You should be able to write very simple multithreaded programs, |
42 | * You should be able to write very simple multithreaded programs, |
37 | * the async framework will automatically take care of most synchronization |
43 | * the async framework will automatically take care of most synchronization |
38 | * problems. |
44 | * problems. |
39 | * |
45 | * |
40 | * Default semantics: |
46 | * Default semantics: |
41 | * - send() - send asynchronously. If the kernel refuses to send more |
47 | * - send() - send asynchronously. If the kernel refuses to send more |
42 | * messages, [ try to get responses from kernel, if nothing |
48 | * messages, [ try to get responses from kernel, if nothing |
43 | * found, might try synchronous ] |
49 | * found, might try synchronous ] |
44 | * |
50 | * |
45 | * Example of use: |
51 | * Example of use: |
46 | * |
52 | * |
47 | * 1) Multithreaded client application |
53 | * 1) Multithreaded client application |
48 | * create_thread(thread1); |
54 | * create_thread(thread1); |
49 | * create_thread(thread2); |
55 | * create_thread(thread2); |
50 | * ... |
56 | * ... |
51 | * |
57 | * |
52 | * thread1() { |
58 | * thread1() { |
53 | * conn = ipc_connect_me_to(); |
59 | * conn = ipc_connect_me_to(); |
54 | * c1 = send(conn); |
60 | * c1 = send(conn); |
55 | * c2 = send(conn); |
61 | * c2 = send(conn); |
56 | * wait_for(c1); |
62 | * wait_for(c1); |
57 | * wait_for(c2); |
63 | * wait_for(c2); |
58 | * } |
64 | * } |
59 | * |
65 | * |
60 | * |
66 | * |
61 | * 2) Multithreaded server application |
67 | * 2) Multithreaded server application |
62 | * main() { |
68 | * main() { |
63 | * async_manager(); |
69 | * async_manager(); |
64 | * } |
70 | * } |
65 | * |
71 | * |
66 | * |
72 | * |
67 | * client_connection(icallid, *icall) { |
73 | * client_connection(icallid, *icall) { |
68 | * if (want_refuse) { |
74 | * if (want_refuse) { |
69 | * ipc_answer_fast(icallid, ELIMIT, 0, 0); |
75 | * ipc_answer_fast(icallid, ELIMIT, 0, 0); |
70 | * return; |
76 | * return; |
71 | * } |
77 | * } |
72 | * ipc_answer_fast(icallid, 0, 0, 0); |
78 | * ipc_answer_fast(icallid, 0, 0, 0); |
73 | * |
79 | * |
74 | * callid = async_get_call(&call); |
80 | * callid = async_get_call(&call); |
75 | * handle(callid, call); |
81 | * handle(callid, call); |
76 | * ipc_answer_fast(callid, 1,2,3); |
82 | * ipc_answer_fast(callid, 1,2,3); |
77 | * |
83 | * |
78 | * callid = async_get_call(&call); |
84 | * callid = async_get_call(&call); |
79 | * .... |
85 | * .... |
80 | * } |
86 | * } |
81 | * |
87 | * |
82 | * TODO: Detaching/joining dead psthreads? |
88 | * TODO: Detaching/joining dead psthreads? |
83 | */ |
89 | */ |
84 | #include <futex.h> |
90 | #include <futex.h> |
85 | #include <async.h> |
91 | #include <async.h> |
86 | #include <psthread.h> |
92 | #include <psthread.h> |
87 | #include <stdio.h> |
93 | #include <stdio.h> |
88 | #include <libadt/hash_table.h> |
94 | #include <libadt/hash_table.h> |
89 | #include <libadt/list.h> |
95 | #include <libadt/list.h> |
90 | #include <ipc/ipc.h> |
96 | #include <ipc/ipc.h> |
91 | #include <assert.h> |
97 | #include <assert.h> |
92 | #include <errno.h> |
98 | #include <errno.h> |
93 | #include <time.h> |
99 | #include <time.h> |
94 | #include <arch/barrier.h> |
100 | #include <arch/barrier.h> |
95 | 101 | ||
96 | atomic_t async_futex = FUTEX_INITIALIZER; |
102 | atomic_t async_futex = FUTEX_INITIALIZER; |
97 | static hash_table_t conn_hash_table; |
103 | static hash_table_t conn_hash_table; |
98 | static LIST_INITIALIZE(timeout_list); |
104 | static LIST_INITIALIZE(timeout_list); |
99 | 105 | ||
100 | typedef struct { |
106 | typedef struct { |
101 | struct timeval expires; /**< Expiration time for waiting thread */ |
107 | struct timeval expires; /**< Expiration time for waiting thread */ |
102 | int inlist; /**< If true, this struct is in timeout list */ |
108 | int inlist; /**< If true, this struct is in timeout list */ |
103 | link_t link; |
109 | link_t link; |
104 | 110 | ||
105 | pstid_t ptid; /**< Thread waiting for this message */ |
111 | pstid_t ptid; /**< Thread waiting for this message */ |
106 | int active; /**< If this thread is currently active */ |
112 | int active; /**< If this thread is currently active */ |
107 | int timedout; /**< If true, we timed out */ |
113 | int timedout; /**< If true, we timed out */ |
108 | } awaiter_t; |
114 | } awaiter_t; |
109 | 115 | ||
110 | typedef struct { |
116 | typedef struct { |
111 | awaiter_t wdata; |
117 | awaiter_t wdata; |
112 | 118 | ||
113 | int done; /**< If reply was received */ |
119 | int done; /**< If reply was received */ |
114 | ipc_call_t *dataptr; /**< Pointer where the answer data |
120 | ipc_call_t *dataptr; /**< Pointer where the answer data |
115 | * is stored */ |
121 | * is stored */ |
116 | ipcarg_t retval; |
122 | ipcarg_t retval; |
117 | } amsg_t; |
123 | } amsg_t; |
118 | 124 | ||
119 | typedef struct { |
125 | typedef struct { |
120 | link_t link; |
126 | link_t link; |
121 | ipc_callid_t callid; |
127 | ipc_callid_t callid; |
122 | ipc_call_t call; |
128 | ipc_call_t call; |
123 | } msg_t; |
129 | } msg_t; |
124 | 130 | ||
125 | typedef struct { |
131 | typedef struct { |
126 | awaiter_t wdata; |
132 | awaiter_t wdata; |
127 | 133 | ||
128 | link_t link; /**< Hash table link */ |
134 | link_t link; /**< Hash table link */ |
129 | ipcarg_t in_phone_hash; /**< Incoming phone hash. */ |
135 | ipcarg_t in_phone_hash; /**< Incoming phone hash. */ |
130 | link_t msg_queue; /**< Messages that should be delivered to this thread */ |
136 | link_t msg_queue; /**< Messages that should be delivered to this thread */ |
131 | /* Structures for connection opening packet */ |
137 | /* Structures for connection opening packet */ |
132 | ipc_callid_t callid; |
138 | ipc_callid_t callid; |
133 | ipc_call_t call; |
139 | ipc_call_t call; |
134 | ipc_callid_t close_callid; /* Identification of closing packet */ |
140 | ipc_callid_t close_callid; /* Identification of closing packet */ |
135 | void (*cthread)(ipc_callid_t,ipc_call_t *); |
141 | void (*cthread)(ipc_callid_t,ipc_call_t *); |
136 | } connection_t; |
142 | } connection_t; |
137 | 143 | ||
138 | /** Identifier of incoming connection handled by current thread */ |
144 | /** Identifier of incoming connection handled by current thread */ |
139 | __thread connection_t *PS_connection; |
145 | __thread connection_t *PS_connection; |
140 | /** If true, it is forbidden to use async_req functions and |
146 | /** If true, it is forbidden to use async_req functions and |
141 | * all preemption is disabled */ |
147 | * all preemption is disabled */ |
142 | __thread int in_interrupt_handler; |
148 | __thread int in_interrupt_handler; |
143 | 149 | ||
144 | static void default_client_connection(ipc_callid_t callid, ipc_call_t *call); |
150 | static void default_client_connection(ipc_callid_t callid, ipc_call_t *call); |
145 | static void default_interrupt_received(ipc_callid_t callid, ipc_call_t *call); |
151 | static void default_interrupt_received(ipc_callid_t callid, ipc_call_t *call); |
146 | static async_client_conn_t client_connection = default_client_connection; |
152 | static async_client_conn_t client_connection = default_client_connection; |
147 | static async_client_conn_t interrupt_received = default_interrupt_received; |
153 | static async_client_conn_t interrupt_received = default_interrupt_received; |
148 | 154 | ||
149 | /** Add microseconds to give timeval */ |
155 | /** Add microseconds to give timeval */ |
150 | static void tv_add(struct timeval *tv, suseconds_t usecs) |
156 | static void tv_add(struct timeval *tv, suseconds_t usecs) |
151 | { |
157 | { |
152 | tv->tv_sec += usecs / 1000000; |
158 | tv->tv_sec += usecs / 1000000; |
153 | tv->tv_usec += usecs % 1000000; |
159 | tv->tv_usec += usecs % 1000000; |
154 | if (tv->tv_usec > 1000000) { |
160 | if (tv->tv_usec > 1000000) { |
155 | tv->tv_sec++; |
161 | tv->tv_sec++; |
156 | tv->tv_usec -= 1000000; |
162 | tv->tv_usec -= 1000000; |
157 | } |
163 | } |
158 | } |
164 | } |
159 | 165 | ||
160 | /** Subtract 2 timevals, return microseconds difference */ |
166 | /** Subtract 2 timevals, return microseconds difference */ |
161 | static suseconds_t tv_sub(struct timeval *tv1, struct timeval *tv2) |
167 | static suseconds_t tv_sub(struct timeval *tv1, struct timeval *tv2) |
162 | { |
168 | { |
163 | suseconds_t result; |
169 | suseconds_t result; |
164 | 170 | ||
165 | result = tv1->tv_usec - tv2->tv_usec; |
171 | result = tv1->tv_usec - tv2->tv_usec; |
166 | result += (tv1->tv_sec - tv2->tv_sec) * 1000000; |
172 | result += (tv1->tv_sec - tv2->tv_sec) * 1000000; |
167 | 173 | ||
168 | return result; |
174 | return result; |
169 | } |
175 | } |
170 | 176 | ||
171 | /** Compare timeval |
177 | /** Compare timeval |
172 | * |
178 | * |
173 | * @return 1 if tv1 > tv2, otherwise 0 |
179 | * @return 1 if tv1 > tv2, otherwise 0 |
174 | */ |
180 | */ |
175 | static int tv_gt(struct timeval *tv1, struct timeval *tv2) |
181 | static int tv_gt(struct timeval *tv1, struct timeval *tv2) |
176 | { |
182 | { |
177 | if (tv1->tv_sec > tv2->tv_sec) |
183 | if (tv1->tv_sec > tv2->tv_sec) |
178 | return 1; |
184 | return 1; |
179 | if (tv1->tv_sec == tv2->tv_sec && tv1->tv_usec > tv2->tv_usec) |
185 | if (tv1->tv_sec == tv2->tv_sec && tv1->tv_usec > tv2->tv_usec) |
180 | return 1; |
186 | return 1; |
181 | return 0; |
187 | return 0; |
182 | } |
188 | } |
183 | static int tv_gteq(struct timeval *tv1, struct timeval *tv2) |
189 | static int tv_gteq(struct timeval *tv1, struct timeval *tv2) |
184 | { |
190 | { |
185 | if (tv1->tv_sec > tv2->tv_sec) |
191 | if (tv1->tv_sec > tv2->tv_sec) |
186 | return 1; |
192 | return 1; |
187 | if (tv1->tv_sec == tv2->tv_sec && tv1->tv_usec >= tv2->tv_usec) |
193 | if (tv1->tv_sec == tv2->tv_sec && tv1->tv_usec >= tv2->tv_usec) |
188 | return 1; |
194 | return 1; |
189 | return 0; |
195 | return 0; |
190 | } |
196 | } |
191 | 197 | ||
192 | /* Hash table functions */ |
198 | /* Hash table functions */ |
193 | #define CONN_HASH_TABLE_CHAINS 32 |
199 | #define CONN_HASH_TABLE_CHAINS 32 |
194 | 200 | ||
195 | static hash_index_t conn_hash(unsigned long *key) |
201 | static hash_index_t conn_hash(unsigned long *key) |
196 | { |
202 | { |
197 | assert(key); |
203 | assert(key); |
198 | return ((*key) >> 4) % CONN_HASH_TABLE_CHAINS; |
204 | return ((*key) >> 4) % CONN_HASH_TABLE_CHAINS; |
199 | } |
205 | } |
200 | 206 | ||
201 | static int conn_compare(unsigned long key[], hash_count_t keys, link_t *item) |
207 | static int conn_compare(unsigned long key[], hash_count_t keys, link_t *item) |
202 | { |
208 | { |
203 | connection_t *hs; |
209 | connection_t *hs; |
204 | 210 | ||
205 | hs = hash_table_get_instance(item, connection_t, link); |
211 | hs = hash_table_get_instance(item, connection_t, link); |
206 | 212 | ||
207 | return key[0] == hs->in_phone_hash; |
213 | return key[0] == hs->in_phone_hash; |
208 | } |
214 | } |
209 | 215 | ||
210 | static void conn_remove(link_t *item) |
216 | static void conn_remove(link_t *item) |
211 | { |
217 | { |
212 | free(hash_table_get_instance(item, connection_t, link)); |
218 | free(hash_table_get_instance(item, connection_t, link)); |
213 | } |
219 | } |
214 | 220 | ||
215 | 221 | ||
216 | /** Operations for NS hash table. */ |
222 | /** Operations for NS hash table. */ |
217 | static hash_table_operations_t conn_hash_table_ops = { |
223 | static hash_table_operations_t conn_hash_table_ops = { |
218 | .hash = conn_hash, |
224 | .hash = conn_hash, |
219 | .compare = conn_compare, |
225 | .compare = conn_compare, |
220 | .remove_callback = conn_remove |
226 | .remove_callback = conn_remove |
221 | }; |
227 | }; |
222 | 228 | ||
223 | /** Insert sort timeout msg into timeouts list |
229 | /** Insert sort timeout msg into timeouts list |
224 | * |
230 | * |
225 | */ |
231 | */ |
226 | static void insert_timeout(awaiter_t *wd) |
232 | static void insert_timeout(awaiter_t *wd) |
227 | { |
233 | { |
228 | link_t *tmp; |
234 | link_t *tmp; |
229 | awaiter_t *cur; |
235 | awaiter_t *cur; |
230 | 236 | ||
231 | wd->timedout = 0; |
237 | wd->timedout = 0; |
232 | wd->inlist = 1; |
238 | wd->inlist = 1; |
233 | 239 | ||
234 | tmp = timeout_list.next; |
240 | tmp = timeout_list.next; |
235 | while (tmp != &timeout_list) { |
241 | while (tmp != &timeout_list) { |
236 | cur = list_get_instance(tmp, awaiter_t, link); |
242 | cur = list_get_instance(tmp, awaiter_t, link); |
237 | if (tv_gteq(&cur->expires, &wd->expires)) |
243 | if (tv_gteq(&cur->expires, &wd->expires)) |
238 | break; |
244 | break; |
239 | tmp = tmp->next; |
245 | tmp = tmp->next; |
240 | } |
246 | } |
241 | list_append(&wd->link, tmp); |
247 | list_append(&wd->link, tmp); |
242 | } |
248 | } |
243 | 249 | ||
244 | /*************************************************/ |
250 | /*************************************************/ |
245 | 251 | ||
246 | /** Try to route a call to an appropriate connection thread |
252 | /** Try to route a call to an appropriate connection thread |
247 | * |
253 | * |
248 | */ |
254 | */ |
249 | static int route_call(ipc_callid_t callid, ipc_call_t *call) |
255 | static int route_call(ipc_callid_t callid, ipc_call_t *call) |
250 | { |
256 | { |
251 | connection_t *conn; |
257 | connection_t *conn; |
252 | msg_t *msg; |
258 | msg_t *msg; |
253 | link_t *hlp; |
259 | link_t *hlp; |
254 | unsigned long key; |
260 | unsigned long key; |
255 | 261 | ||
256 | futex_down(&async_futex); |
262 | futex_down(&async_futex); |
257 | 263 | ||
258 | key = call->in_phone_hash; |
264 | key = call->in_phone_hash; |
259 | hlp = hash_table_find(&conn_hash_table, &key); |
265 | hlp = hash_table_find(&conn_hash_table, &key); |
260 | if (!hlp) { |
266 | if (!hlp) { |
261 | futex_up(&async_futex); |
267 | futex_up(&async_futex); |
262 | return 0; |
268 | return 0; |
263 | } |
269 | } |
264 | conn = hash_table_get_instance(hlp, connection_t, link); |
270 | conn = hash_table_get_instance(hlp, connection_t, link); |
265 | 271 | ||
266 | msg = malloc(sizeof(*msg)); |
272 | msg = malloc(sizeof(*msg)); |
267 | msg->callid = callid; |
273 | msg->callid = callid; |
268 | msg->call = *call; |
274 | msg->call = *call; |
269 | list_append(&msg->link, &conn->msg_queue); |
275 | list_append(&msg->link, &conn->msg_queue); |
270 | 276 | ||
271 | if (IPC_GET_METHOD(*call) == IPC_M_PHONE_HUNGUP) |
277 | if (IPC_GET_METHOD(*call) == IPC_M_PHONE_HUNGUP) |
272 | conn->close_callid = callid; |
278 | conn->close_callid = callid; |
273 | 279 | ||
274 | /* If the call is waiting for event, run it */ |
280 | /* If the call is waiting for event, run it */ |
275 | if (!conn->wdata.active) { |
281 | if (!conn->wdata.active) { |
276 | /* If in timeout list, remove it */ |
282 | /* If in timeout list, remove it */ |
277 | if (conn->wdata.inlist) { |
283 | if (conn->wdata.inlist) { |
278 | conn->wdata.inlist = 0; |
284 | conn->wdata.inlist = 0; |
279 | list_remove(&conn->wdata.link); |
285 | list_remove(&conn->wdata.link); |
280 | } |
286 | } |
281 | conn->wdata.active = 1; |
287 | conn->wdata.active = 1; |
282 | psthread_add_ready(conn->wdata.ptid); |
288 | psthread_add_ready(conn->wdata.ptid); |
283 | } |
289 | } |
284 | 290 | ||
285 | futex_up(&async_futex); |
291 | futex_up(&async_futex); |
286 | 292 | ||
287 | return 1; |
293 | return 1; |
288 | } |
294 | } |
289 | 295 | ||
290 | /** Return new incoming message for current(thread-local) connection */ |
296 | /** Return new incoming message for current(thread-local) connection */ |
291 | ipc_callid_t async_get_call_timeout(ipc_call_t *call, suseconds_t usecs) |
297 | ipc_callid_t async_get_call_timeout(ipc_call_t *call, suseconds_t usecs) |
292 | { |
298 | { |
293 | msg_t *msg; |
299 | msg_t *msg; |
294 | ipc_callid_t callid; |
300 | ipc_callid_t callid; |
295 | connection_t *conn; |
301 | connection_t *conn; |
296 | 302 | ||
297 | assert(PS_connection); |
303 | assert(PS_connection); |
298 | /* GCC 4.1.0 coughs on PS_connection-> dereference, |
304 | /* GCC 4.1.0 coughs on PS_connection-> dereference, |
299 | * GCC 4.1.1 happilly puts the rdhwr instruction in delay slot. |
305 | * GCC 4.1.1 happilly puts the rdhwr instruction in delay slot. |
300 | * I would never expect to find so many errors in |
306 | * I would never expect to find so many errors in |
301 | * compiler *($&$(*&$ |
307 | * compiler *($&$(*&$ |
302 | */ |
308 | */ |
303 | conn = PS_connection; |
309 | conn = PS_connection; |
304 | 310 | ||
305 | futex_down(&async_futex); |
311 | futex_down(&async_futex); |
306 | 312 | ||
307 | if (usecs) { |
313 | if (usecs) { |
308 | gettimeofday(&conn->wdata.expires, NULL); |
314 | gettimeofday(&conn->wdata.expires, NULL); |
309 | tv_add(&conn->wdata.expires, usecs); |
315 | tv_add(&conn->wdata.expires, usecs); |
310 | } else { |
316 | } else { |
311 | conn->wdata.inlist = 0; |
317 | conn->wdata.inlist = 0; |
312 | } |
318 | } |
313 | /* If nothing in queue, wait until something appears */ |
319 | /* If nothing in queue, wait until something appears */ |
314 | while (list_empty(&conn->msg_queue)) { |
320 | while (list_empty(&conn->msg_queue)) { |
315 | if (usecs) |
321 | if (usecs) |
316 | insert_timeout(&conn->wdata); |
322 | insert_timeout(&conn->wdata); |
317 | 323 | ||
318 | conn->wdata.active = 0; |
324 | conn->wdata.active = 0; |
319 | psthread_schedule_next_adv(PS_TO_MANAGER); |
325 | psthread_schedule_next_adv(PS_TO_MANAGER); |
320 | /* Futex is up after getting back from async_manager |
326 | /* Futex is up after getting back from async_manager |
321 | * get it again */ |
327 | * get it again */ |
322 | futex_down(&async_futex); |
328 | futex_down(&async_futex); |
323 | if (usecs && conn->wdata.timedout && \ |
329 | if (usecs && conn->wdata.timedout && \ |
324 | list_empty(&conn->msg_queue)) { |
330 | list_empty(&conn->msg_queue)) { |
325 | /* If we timed out-> exit */ |
331 | /* If we timed out-> exit */ |
326 | futex_up(&async_futex); |
332 | futex_up(&async_futex); |
327 | return 0; |
333 | return 0; |
328 | } |
334 | } |
329 | } |
335 | } |
330 | 336 | ||
331 | msg = list_get_instance(conn->msg_queue.next, msg_t, link); |
337 | msg = list_get_instance(conn->msg_queue.next, msg_t, link); |
332 | list_remove(&msg->link); |
338 | list_remove(&msg->link); |
333 | callid = msg->callid; |
339 | callid = msg->callid; |
334 | *call = msg->call; |
340 | *call = msg->call; |
335 | free(msg); |
341 | free(msg); |
336 | 342 | ||
337 | futex_up(&async_futex); |
343 | futex_up(&async_futex); |
338 | return callid; |
344 | return callid; |
339 | } |
345 | } |
340 | 346 | ||
341 | /** Thread function that gets created on new connection |
347 | /** Thread function that gets created on new connection |
342 | * |
348 | * |
343 | * This function is defined as a weak symbol - to be redefined in |
349 | * This function is defined as a weak symbol - to be redefined in |
344 | * user code. |
350 | * user code. |
345 | */ |
351 | */ |
346 | static void default_client_connection(ipc_callid_t callid, ipc_call_t *call) |
352 | static void default_client_connection(ipc_callid_t callid, ipc_call_t *call) |
347 | { |
353 | { |
348 | ipc_answer_fast(callid, ENOENT, 0, 0); |
354 | ipc_answer_fast(callid, ENOENT, 0, 0); |
349 | } |
355 | } |
350 | static void default_interrupt_received(ipc_callid_t callid, ipc_call_t *call) |
356 | static void default_interrupt_received(ipc_callid_t callid, ipc_call_t *call) |
351 | { |
357 | { |
352 | } |
358 | } |
353 | 359 | ||
354 | /** Wrapper for client connection thread |
360 | /** Wrapper for client connection thread |
355 | * |
361 | * |
356 | * When new connection arrives, thread with this function is created. |
362 | * When new connection arrives, thread with this function is created. |
357 | * It calls client_connection and does final cleanup. |
363 | * It calls client_connection and does final cleanup. |
358 | * |
364 | * |
359 | * @parameter arg Connection structure pointer |
365 | * @param arg Connection structure pointer |
360 | */ |
366 | */ |
361 | static int connection_thread(void *arg) |
367 | static int connection_thread(void *arg) |
362 | { |
368 | { |
363 | unsigned long key; |
369 | unsigned long key; |
364 | msg_t *msg; |
370 | msg_t *msg; |
365 | int close_answered = 0; |
371 | int close_answered = 0; |
366 | 372 | ||
367 | /* Setup thread local connection pointer */ |
373 | /* Setup thread local connection pointer */ |
368 | PS_connection = (connection_t *)arg; |
374 | PS_connection = (connection_t *)arg; |
369 | PS_connection->cthread(PS_connection->callid, &PS_connection->call); |
375 | PS_connection->cthread(PS_connection->callid, &PS_connection->call); |
370 | /* Remove myself from connection hash table */ |
376 | /* Remove myself from connection hash table */ |
371 | futex_down(&async_futex); |
377 | futex_down(&async_futex); |
372 | key = PS_connection->in_phone_hash; |
378 | key = PS_connection->in_phone_hash; |
373 | hash_table_remove(&conn_hash_table, &key, 1); |
379 | hash_table_remove(&conn_hash_table, &key, 1); |
374 | futex_up(&async_futex); |
380 | futex_up(&async_futex); |
375 | /* Answer all remaining messages with ehangup */ |
381 | /* Answer all remaining messages with ehangup */ |
376 | while (!list_empty(&PS_connection->msg_queue)) { |
382 | while (!list_empty(&PS_connection->msg_queue)) { |
377 | msg = list_get_instance(PS_connection->msg_queue.next, msg_t, link); |
383 | msg = list_get_instance(PS_connection->msg_queue.next, msg_t, link); |
378 | list_remove(&msg->link); |
384 | list_remove(&msg->link); |
379 | if (msg->callid == PS_connection->close_callid) |
385 | if (msg->callid == PS_connection->close_callid) |
380 | close_answered = 1; |
386 | close_answered = 1; |
381 | ipc_answer_fast(msg->callid, EHANGUP, 0, 0); |
387 | ipc_answer_fast(msg->callid, EHANGUP, 0, 0); |
382 | free(msg); |
388 | free(msg); |
383 | } |
389 | } |
384 | if (PS_connection->close_callid) |
390 | if (PS_connection->close_callid) |
385 | ipc_answer_fast(PS_connection->close_callid, 0, 0, 0); |
391 | ipc_answer_fast(PS_connection->close_callid, 0, 0, 0); |
386 | } |
392 | } |
387 | 393 | ||
388 | /** Create new thread for a new connection |
394 | /** Create new thread for a new connection |
389 | * |
395 | * |
390 | * Creates new thread for connection, fills in connection |
396 | * Creates new thread for connection, fills in connection |
391 | * structures and inserts it into the hash table, so that |
397 | * structures and inserts it into the hash table, so that |
392 | * later we can easily do routing of messages to particular |
398 | * later we can easily do routing of messages to particular |
393 | * threads. |
399 | * threads. |
394 | * |
400 | * |
395 | * @param in_phone_hash Identification of the incoming connection |
401 | * @param in_phone_hash Identification of the incoming connection |
396 | * @param callid Callid of the IPC_M_CONNECT_ME_TO packet |
402 | * @param callid Callid of the IPC_M_CONNECT_ME_TO packet |
397 | * @param call Call data of the opening packet |
403 | * @param call Call data of the opening packet |
398 | * @param cthread Thread function that should be called upon |
404 | * @param cthread Thread function that should be called upon |
399 | * opening the connection |
405 | * opening the connection |
400 | * @return New thread id |
406 | * @return New thread id |
401 | */ |
407 | */ |
402 | pstid_t async_new_connection(ipcarg_t in_phone_hash,ipc_callid_t callid, |
408 | pstid_t async_new_connection(ipcarg_t in_phone_hash,ipc_callid_t callid, |
403 | ipc_call_t *call, |
409 | ipc_call_t *call, |
404 | void (*cthread)(ipc_callid_t,ipc_call_t *)) |
410 | void (*cthread)(ipc_callid_t,ipc_call_t *)) |
405 | { |
411 | { |
406 | pstid_t ptid; |
412 | pstid_t ptid; |
407 | connection_t *conn; |
413 | connection_t *conn; |
408 | unsigned long key; |
414 | unsigned long key; |
409 | 415 | ||
410 | conn = malloc(sizeof(*conn)); |
416 | conn = malloc(sizeof(*conn)); |
411 | if (!conn) { |
417 | if (!conn) { |
412 | ipc_answer_fast(callid, ENOMEM, 0, 0); |
418 | ipc_answer_fast(callid, ENOMEM, 0, 0); |
413 | return NULL; |
419 | return NULL; |
414 | } |
420 | } |
415 | conn->in_phone_hash = in_phone_hash; |
421 | conn->in_phone_hash = in_phone_hash; |
416 | list_initialize(&conn->msg_queue); |
422 | list_initialize(&conn->msg_queue); |
417 | conn->callid = callid; |
423 | conn->callid = callid; |
418 | conn->close_callid = 0; |
424 | conn->close_callid = 0; |
419 | if (call) |
425 | if (call) |
420 | conn->call = *call; |
426 | conn->call = *call; |
421 | conn->wdata.active = 1; /* We will activate it asap */ |
427 | conn->wdata.active = 1; /* We will activate it asap */ |
422 | conn->cthread = cthread; |
428 | conn->cthread = cthread; |
423 | 429 | ||
424 | conn->wdata.ptid = psthread_create(connection_thread, conn); |
430 | conn->wdata.ptid = psthread_create(connection_thread, conn); |
425 | if (!conn->wdata.ptid) { |
431 | if (!conn->wdata.ptid) { |
426 | free(conn); |
432 | free(conn); |
427 | ipc_answer_fast(callid, ENOMEM, 0, 0); |
433 | ipc_answer_fast(callid, ENOMEM, 0, 0); |
428 | return NULL; |
434 | return NULL; |
429 | } |
435 | } |
430 | /* Add connection to hash table */ |
436 | /* Add connection to hash table */ |
431 | key = conn->in_phone_hash; |
437 | key = conn->in_phone_hash; |
432 | futex_down(&async_futex); |
438 | futex_down(&async_futex); |
433 | hash_table_insert(&conn_hash_table, &key, &conn->link); |
439 | hash_table_insert(&conn_hash_table, &key, &conn->link); |
434 | futex_up(&async_futex); |
440 | futex_up(&async_futex); |
435 | 441 | ||
436 | psthread_add_ready(conn->wdata.ptid); |
442 | psthread_add_ready(conn->wdata.ptid); |
437 | 443 | ||
438 | return conn->wdata.ptid; |
444 | return conn->wdata.ptid; |
439 | } |
445 | } |
440 | 446 | ||
441 | /** Handle call that was received */ |
447 | /** Handle call that was received */ |
442 | static void handle_call(ipc_callid_t callid, ipc_call_t *call) |
448 | static void handle_call(ipc_callid_t callid, ipc_call_t *call) |
443 | { |
449 | { |
444 | /* Unrouted call - do some default behaviour */ |
450 | /* Unrouted call - do some default behaviour */ |
445 | switch (IPC_GET_METHOD(*call)) { |
451 | switch (IPC_GET_METHOD(*call)) { |
446 | case IPC_M_INTERRUPT: |
452 | case IPC_M_INTERRUPT: |
447 | in_interrupt_handler = 1; |
453 | in_interrupt_handler = 1; |
448 | (*interrupt_received)(callid,call); |
454 | (*interrupt_received)(callid,call); |
449 | in_interrupt_handler = 0; |
455 | in_interrupt_handler = 0; |
450 | return; |
456 | return; |
451 | case IPC_M_CONNECT_ME_TO: |
457 | case IPC_M_CONNECT_ME_TO: |
452 | /* Open new connection with thread etc. */ |
458 | /* Open new connection with thread etc. */ |
453 | async_new_connection(IPC_GET_ARG3(*call), callid, call, client_connection); |
459 | async_new_connection(IPC_GET_ARG3(*call), callid, call, client_connection); |
454 | return; |
460 | return; |
455 | } |
461 | } |
456 | 462 | ||
457 | /* Try to route call through connection tables */ |
463 | /* Try to route call through connection tables */ |
458 | if (route_call(callid, call)) |
464 | if (route_call(callid, call)) |
459 | return; |
465 | return; |
460 | 466 | ||
461 | /* Unknown call from unknown phone - hang it up */ |
467 | /* Unknown call from unknown phone - hang it up */ |
462 | ipc_answer_fast(callid, EHANGUP, 0, 0); |
468 | ipc_answer_fast(callid, EHANGUP, 0, 0); |
463 | } |
469 | } |
464 | 470 | ||
465 | /** Fire all timeouts that expired |
471 | /** Fire all timeouts that expired |
466 | * |
472 | * |
467 | */ |
473 | */ |
468 | static void handle_expired_timeouts(void) |
474 | static void handle_expired_timeouts(void) |
469 | { |
475 | { |
470 | struct timeval tv; |
476 | struct timeval tv; |
471 | awaiter_t *waiter; |
477 | awaiter_t *waiter; |
472 | link_t *cur; |
478 | link_t *cur; |
473 | 479 | ||
474 | gettimeofday(&tv,NULL); |
480 | gettimeofday(&tv,NULL); |
475 | futex_down(&async_futex); |
481 | futex_down(&async_futex); |
476 | 482 | ||
477 | cur = timeout_list.next; |
483 | cur = timeout_list.next; |
478 | while (cur != &timeout_list) { |
484 | while (cur != &timeout_list) { |
479 | waiter = list_get_instance(cur,awaiter_t,link); |
485 | waiter = list_get_instance(cur,awaiter_t,link); |
480 | if (tv_gt(&waiter->expires, &tv)) |
486 | if (tv_gt(&waiter->expires, &tv)) |
481 | break; |
487 | break; |
482 | cur = cur->next; |
488 | cur = cur->next; |
483 | list_remove(&waiter->link); |
489 | list_remove(&waiter->link); |
484 | waiter->inlist = 0; |
490 | waiter->inlist = 0; |
485 | waiter->timedout = 1; |
491 | waiter->timedout = 1; |
486 | /* Redundant condition? The thread should not |
492 | /* Redundant condition? The thread should not |
487 | * be active when it gets here. |
493 | * be active when it gets here. |
488 | */ |
494 | */ |
489 | if (!waiter->active) { |
495 | if (!waiter->active) { |
490 | waiter->active = 1; |
496 | waiter->active = 1; |
491 | psthread_add_ready(waiter->ptid); |
497 | psthread_add_ready(waiter->ptid); |
492 | } |
498 | } |
493 | } |
499 | } |
494 | 500 | ||
495 | futex_up(&async_futex); |
501 | futex_up(&async_futex); |
496 | } |
502 | } |
497 | 503 | ||
498 | /** Endless loop dispatching incoming calls and answers */ |
504 | /** Endless loop dispatching incoming calls and answers */ |
499 | static int async_manager_worker(void) |
505 | static int async_manager_worker(void) |
500 | { |
506 | { |
501 | ipc_call_t call; |
507 | ipc_call_t call; |
502 | ipc_callid_t callid; |
508 | ipc_callid_t callid; |
503 | int timeout; |
509 | int timeout; |
504 | awaiter_t *waiter; |
510 | awaiter_t *waiter; |
505 | struct timeval tv; |
511 | struct timeval tv; |
506 | 512 | ||
507 | while (1) { |
513 | while (1) { |
508 | if (psthread_schedule_next_adv(PS_FROM_MANAGER)) { |
514 | if (psthread_schedule_next_adv(PS_FROM_MANAGER)) { |
509 | futex_up(&async_futex); /* async_futex is always held |
515 | futex_up(&async_futex); /* async_futex is always held |
510 | * when entering manager thread |
516 | * when entering manager thread |
511 | */ |
517 | */ |
512 | continue; |
518 | continue; |
513 | } |
519 | } |
514 | futex_down(&async_futex); |
520 | futex_down(&async_futex); |
515 | if (!list_empty(&timeout_list)) { |
521 | if (!list_empty(&timeout_list)) { |
516 | waiter = list_get_instance(timeout_list.next,awaiter_t,link); |
522 | waiter = list_get_instance(timeout_list.next,awaiter_t,link); |
517 | gettimeofday(&tv,NULL); |
523 | gettimeofday(&tv,NULL); |
518 | if (tv_gteq(&tv, &waiter->expires)) { |
524 | if (tv_gteq(&tv, &waiter->expires)) { |
519 | futex_up(&async_futex); |
525 | futex_up(&async_futex); |
520 | handle_expired_timeouts(); |
526 | handle_expired_timeouts(); |
521 | continue; |
527 | continue; |
522 | } else |
528 | } else |
523 | timeout = tv_sub(&waiter->expires, &tv); |
529 | timeout = tv_sub(&waiter->expires, &tv); |
524 | } else |
530 | } else |
525 | timeout = SYNCH_NO_TIMEOUT; |
531 | timeout = SYNCH_NO_TIMEOUT; |
526 | futex_up(&async_futex); |
532 | futex_up(&async_futex); |
527 | 533 | ||
528 | callid = ipc_wait_cycle(&call, timeout, SYNCH_FLAGS_NONE); |
534 | callid = ipc_wait_cycle(&call, timeout, SYNCH_FLAGS_NONE); |
529 | 535 | ||
530 | if (!callid) { |
536 | if (!callid) { |
531 | handle_expired_timeouts(); |
537 | handle_expired_timeouts(); |
532 | continue; |
538 | continue; |
533 | } |
539 | } |
534 | 540 | ||
535 | if (callid & IPC_CALLID_ANSWERED) { |
541 | if (callid & IPC_CALLID_ANSWERED) { |
536 | continue; |
542 | continue; |
537 | } |
543 | } |
538 | 544 | ||
539 | handle_call(callid, &call); |
545 | handle_call(callid, &call); |
540 | } |
546 | } |
541 | } |
547 | } |
542 | 548 | ||
543 | /** Function to start async_manager as a standalone thread |
549 | /** Function to start async_manager as a standalone thread |
544 | * |
550 | * |
545 | * When more kernel threads are used, one async manager should |
551 | * When more kernel threads are used, one async manager should |
546 | * exist per thread. The particular implementation may change, |
552 | * exist per thread. The particular implementation may change, |
547 | * currently one async_manager is started automatically per kernel |
553 | * currently one async_manager is started automatically per kernel |
548 | * thread except main thread. |
554 | * thread except main thread. |
549 | */ |
555 | */ |
550 | static int async_manager_thread(void *arg) |
556 | static int async_manager_thread(void *arg) |
551 | { |
557 | { |
552 | futex_up(&async_futex); /* async_futex is always locked when entering |
558 | futex_up(&async_futex); /* async_futex is always locked when entering |
553 | * manager */ |
559 | * manager */ |
554 | async_manager_worker(); |
560 | async_manager_worker(); |
555 | } |
561 | } |
556 | 562 | ||
557 | /** Add one manager to manager list */ |
563 | /** Add one manager to manager list */ |
558 | void async_create_manager(void) |
564 | void async_create_manager(void) |
559 | { |
565 | { |
560 | pstid_t ptid; |
566 | pstid_t ptid; |
561 | 567 | ||
562 | ptid = psthread_create(async_manager_thread, NULL); |
568 | ptid = psthread_create(async_manager_thread, NULL); |
563 | psthread_add_manager(ptid); |
569 | psthread_add_manager(ptid); |
564 | } |
570 | } |
565 | 571 | ||
566 | /** Remove one manager from manager list */ |
572 | /** Remove one manager from manager list */ |
567 | void async_destroy_manager(void) |
573 | void async_destroy_manager(void) |
568 | { |
574 | { |
569 | psthread_remove_manager(); |
575 | psthread_remove_manager(); |
570 | } |
576 | } |
571 | 577 | ||
572 | /** Initialize internal structures needed for async manager */ |
578 | /** Initialize internal structures needed for async manager */ |
573 | int _async_init(void) |
579 | int _async_init(void) |
574 | { |
580 | { |
575 | if (!hash_table_create(&conn_hash_table, CONN_HASH_TABLE_CHAINS, 1, &conn_hash_table_ops)) { |
581 | if (!hash_table_create(&conn_hash_table, CONN_HASH_TABLE_CHAINS, 1, &conn_hash_table_ops)) { |
576 | printf("%s: cannot create hash table\n", "async"); |
582 | printf("%s: cannot create hash table\n", "async"); |
577 | return ENOMEM; |
583 | return ENOMEM; |
578 | } |
584 | } |
579 | 585 | ||
580 | } |
586 | } |
581 | 587 | ||
582 | /** IPC handler for messages in async framework |
588 | /** IPC handler for messages in async framework |
583 | * |
589 | * |
584 | * Notify thread that is waiting for this message, that it arrived |
590 | * Notify thread that is waiting for this message, that it arrived |
585 | */ |
591 | */ |
586 | static void reply_received(void *private, int retval, |
592 | static void reply_received(void *private, int retval, |
587 | ipc_call_t *data) |
593 | ipc_call_t *data) |
588 | { |
594 | { |
589 | amsg_t *msg = (amsg_t *) private; |
595 | amsg_t *msg = (amsg_t *) private; |
590 | 596 | ||
591 | msg->retval = retval; |
597 | msg->retval = retval; |
592 | 598 | ||
593 | futex_down(&async_futex); |
599 | futex_down(&async_futex); |
594 | /* Copy data after futex_down, just in case the |
600 | /* Copy data after futex_down, just in case the |
595 | * call was detached |
601 | * call was detached |
596 | */ |
602 | */ |
597 | if (msg->dataptr) |
603 | if (msg->dataptr) |
598 | *msg->dataptr = *data; |
604 | *msg->dataptr = *data; |
599 | 605 | ||
600 | write_barrier(); |
606 | write_barrier(); |
601 | /* Remove message from timeout list */ |
607 | /* Remove message from timeout list */ |
602 | if (msg->wdata.inlist) |
608 | if (msg->wdata.inlist) |
603 | list_remove(&msg->wdata.link); |
609 | list_remove(&msg->wdata.link); |
604 | msg->done = 1; |
610 | msg->done = 1; |
605 | if (! msg->wdata.active) { |
611 | if (! msg->wdata.active) { |
606 | msg->wdata.active = 1; |
612 | msg->wdata.active = 1; |
607 | psthread_add_ready(msg->wdata.ptid); |
613 | psthread_add_ready(msg->wdata.ptid); |
608 | } |
614 | } |
609 | futex_up(&async_futex); |
615 | futex_up(&async_futex); |
610 | } |
616 | } |
611 | 617 | ||
612 | /** Send message and return id of the sent message |
618 | /** Send message and return id of the sent message |
613 | * |
619 | * |
614 | * The return value can be used as input for async_wait() to wait |
620 | * The return value can be used as input for async_wait() to wait |
615 | * for completion. |
621 | * for completion. |
616 | */ |
622 | */ |
617 | aid_t async_send_2(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2, |
623 | aid_t async_send_2(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2, |
618 | ipc_call_t *dataptr) |
624 | ipc_call_t *dataptr) |
619 | { |
625 | { |
620 | amsg_t *msg; |
626 | amsg_t *msg; |
621 | 627 | ||
622 | if (in_interrupt_handler) { |
628 | if (in_interrupt_handler) { |
623 | printf("Cannot send asynchronou request in interrupt handler.\n"); |
629 | printf("Cannot send asynchronou request in interrupt handler.\n"); |
624 | _exit(1); |
630 | _exit(1); |
625 | } |
631 | } |
626 | 632 | ||
627 | msg = malloc(sizeof(*msg)); |
633 | msg = malloc(sizeof(*msg)); |
628 | msg->done = 0; |
634 | msg->done = 0; |
629 | msg->dataptr = dataptr; |
635 | msg->dataptr = dataptr; |
630 | 636 | ||
631 | msg->wdata.active = 1; /* We may sleep in next method, but it |
637 | msg->wdata.active = 1; /* We may sleep in next method, but it |
632 | * will use it's own mechanism */ |
638 | * will use it's own mechanism */ |
633 | ipc_call_async_2(phoneid,method,arg1,arg2,msg,reply_received,1); |
639 | ipc_call_async_2(phoneid,method,arg1,arg2,msg,reply_received,1); |
634 | 640 | ||
635 | return (aid_t) msg; |
641 | return (aid_t) msg; |
636 | } |
642 | } |
637 | 643 | ||
638 | /** Send message and return id of the sent message |
644 | /** Send message and return id of the sent message |
639 | * |
645 | * |
640 | * The return value can be used as input for async_wait() to wait |
646 | * The return value can be used as input for async_wait() to wait |
641 | * for completion. |
647 | * for completion. |
642 | */ |
648 | */ |
643 | aid_t async_send_3(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2, |
649 | aid_t async_send_3(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2, |
644 | ipcarg_t arg3, ipc_call_t *dataptr) |
650 | ipcarg_t arg3, ipc_call_t *dataptr) |
645 | { |
651 | { |
646 | amsg_t *msg; |
652 | amsg_t *msg; |
647 | 653 | ||
648 | if (in_interrupt_handler) { |
654 | if (in_interrupt_handler) { |
649 | printf("Cannot send asynchronou request in interrupt handler.\n"); |
655 | printf("Cannot send asynchronou request in interrupt handler.\n"); |
650 | _exit(1); |
656 | _exit(1); |
651 | } |
657 | } |
652 | 658 | ||
653 | msg = malloc(sizeof(*msg)); |
659 | msg = malloc(sizeof(*msg)); |
654 | msg->done = 0; |
660 | msg->done = 0; |
655 | msg->dataptr = dataptr; |
661 | msg->dataptr = dataptr; |
656 | 662 | ||
657 | msg->wdata.active = 1; /* We may sleep in next method, but it |
663 | msg->wdata.active = 1; /* We may sleep in next method, but it |
658 | * will use it's own mechanism */ |
664 | * will use it's own mechanism */ |
659 | ipc_call_async_3(phoneid,method,arg1,arg2,arg3, msg,reply_received,1); |
665 | ipc_call_async_3(phoneid,method,arg1,arg2,arg3, msg,reply_received,1); |
660 | 666 | ||
661 | return (aid_t) msg; |
667 | return (aid_t) msg; |
662 | } |
668 | } |
663 | 669 | ||
664 | /** Wait for a message sent by async framework |
670 | /** Wait for a message sent by async framework |
665 | * |
671 | * |
666 | * @param amsgid Message ID to wait for |
672 | * @param amsgid Message ID to wait for |
667 | * @param retval Pointer to variable where will be stored retval |
673 | * @param retval Pointer to variable where will be stored retval |
668 | * of the answered message. If NULL, it is ignored. |
674 | * of the answered message. If NULL, it is ignored. |
669 | * |
675 | * |
670 | */ |
676 | */ |
671 | void async_wait_for(aid_t amsgid, ipcarg_t *retval) |
677 | void async_wait_for(aid_t amsgid, ipcarg_t *retval) |
672 | { |
678 | { |
673 | amsg_t *msg = (amsg_t *) amsgid; |
679 | amsg_t *msg = (amsg_t *) amsgid; |
674 | connection_t *conn; |
680 | connection_t *conn; |
675 | 681 | ||
676 | futex_down(&async_futex); |
682 | futex_down(&async_futex); |
677 | if (msg->done) { |
683 | if (msg->done) { |
678 | futex_up(&async_futex); |
684 | futex_up(&async_futex); |
679 | goto done; |
685 | goto done; |
680 | } |
686 | } |
681 | 687 | ||
682 | msg->wdata.ptid = psthread_get_id(); |
688 | msg->wdata.ptid = psthread_get_id(); |
683 | msg->wdata.active = 0; |
689 | msg->wdata.active = 0; |
684 | msg->wdata.inlist = 0; |
690 | msg->wdata.inlist = 0; |
685 | /* Leave locked async_futex when entering this function */ |
691 | /* Leave locked async_futex when entering this function */ |
686 | psthread_schedule_next_adv(PS_TO_MANAGER); |
692 | psthread_schedule_next_adv(PS_TO_MANAGER); |
687 | /* futex is up automatically after psthread_schedule_next...*/ |
693 | /* futex is up automatically after psthread_schedule_next...*/ |
688 | done: |
694 | done: |
689 | if (retval) |
695 | if (retval) |
690 | *retval = msg->retval; |
696 | *retval = msg->retval; |
691 | free(msg); |
697 | free(msg); |
692 | } |
698 | } |
693 | 699 | ||
694 | /** Wait for a message sent by async framework with timeout |
700 | /** Wait for a message sent by async framework with timeout |
695 | * |
701 | * |
696 | * @param amsgid Message ID to wait for |
702 | * @param amsgid Message ID to wait for |
697 | * @param retval Pointer to variable where will be stored retval |
703 | * @param retval Pointer to variable where will be stored retval |
698 | * of the answered message. If NULL, it is ignored. |
704 | * of the answered message. If NULL, it is ignored. |
699 | * @param timeout Timeout in usecs |
705 | * @param timeout Timeout in usecs |
700 | * @return 0 on success, ETIMEOUT if timeout expired |
706 | * @return 0 on success, ETIMEOUT if timeout expired |
701 | * |
707 | * |
702 | */ |
708 | */ |
703 | int async_wait_timeout(aid_t amsgid, ipcarg_t *retval, suseconds_t timeout) |
709 | int async_wait_timeout(aid_t amsgid, ipcarg_t *retval, suseconds_t timeout) |
704 | { |
710 | { |
705 | amsg_t *msg = (amsg_t *) amsgid; |
711 | amsg_t *msg = (amsg_t *) amsgid; |
706 | connection_t *conn; |
712 | connection_t *conn; |
707 | 713 | ||
708 | /* TODO: Let it go through the event read at least once */ |
714 | /* TODO: Let it go through the event read at least once */ |
709 | if (timeout < 0) |
715 | if (timeout < 0) |
710 | return ETIMEOUT; |
716 | return ETIMEOUT; |
711 | 717 | ||
712 | futex_down(&async_futex); |
718 | futex_down(&async_futex); |
713 | if (msg->done) { |
719 | if (msg->done) { |
714 | futex_up(&async_futex); |
720 | futex_up(&async_futex); |
715 | goto done; |
721 | goto done; |
716 | } |
722 | } |
717 | 723 | ||
718 | gettimeofday(&msg->wdata.expires, NULL); |
724 | gettimeofday(&msg->wdata.expires, NULL); |
719 | tv_add(&msg->wdata.expires, timeout); |
725 | tv_add(&msg->wdata.expires, timeout); |
720 | 726 | ||
721 | msg->wdata.ptid = psthread_get_id(); |
727 | msg->wdata.ptid = psthread_get_id(); |
722 | msg->wdata.active = 0; |
728 | msg->wdata.active = 0; |
723 | insert_timeout(&msg->wdata); |
729 | insert_timeout(&msg->wdata); |
724 | 730 | ||
725 | /* Leave locked async_futex when entering this function */ |
731 | /* Leave locked async_futex when entering this function */ |
726 | psthread_schedule_next_adv(PS_TO_MANAGER); |
732 | psthread_schedule_next_adv(PS_TO_MANAGER); |
727 | /* futex is up automatically after psthread_schedule_next...*/ |
733 | /* futex is up automatically after psthread_schedule_next...*/ |
728 | 734 | ||
729 | if (!msg->done) |
735 | if (!msg->done) |
730 | return ETIMEOUT; |
736 | return ETIMEOUT; |
731 | 737 | ||
732 | done: |
738 | done: |
733 | if (retval) |
739 | if (retval) |
734 | *retval = msg->retval; |
740 | *retval = msg->retval; |
735 | free(msg); |
741 | free(msg); |
736 | 742 | ||
737 | return 0; |
743 | return 0; |
738 | } |
744 | } |
739 | 745 | ||
740 | /** Wait specified time, but in the meantime handle incoming events |
746 | /** Wait specified time, but in the meantime handle incoming events |
741 | * |
747 | * |
742 | * @param timeout Time in microseconds to wait |
748 | * @param timeout Time in microseconds to wait |
743 | */ |
749 | */ |
744 | void async_usleep(suseconds_t timeout) |
750 | void async_usleep(suseconds_t timeout) |
745 | { |
751 | { |
746 | amsg_t *msg; |
752 | amsg_t *msg; |
747 | 753 | ||
748 | if (in_interrupt_handler) { |
754 | if (in_interrupt_handler) { |
749 | printf("Cannot call async_usleep in interrupt handler.\n"); |
755 | printf("Cannot call async_usleep in interrupt handler.\n"); |
750 | _exit(1); |
756 | _exit(1); |
751 | } |
757 | } |
752 | 758 | ||
753 | msg = malloc(sizeof(*msg)); |
759 | msg = malloc(sizeof(*msg)); |
754 | if (!msg) |
760 | if (!msg) |
755 | return; |
761 | return; |
756 | 762 | ||
757 | msg->wdata.ptid = psthread_get_id(); |
763 | msg->wdata.ptid = psthread_get_id(); |
758 | msg->wdata.active = 0; |
764 | msg->wdata.active = 0; |
759 | 765 | ||
760 | gettimeofday(&msg->wdata.expires, NULL); |
766 | gettimeofday(&msg->wdata.expires, NULL); |
761 | tv_add(&msg->wdata.expires, timeout); |
767 | tv_add(&msg->wdata.expires, timeout); |
762 | 768 | ||
763 | futex_down(&async_futex); |
769 | futex_down(&async_futex); |
764 | insert_timeout(&msg->wdata); |
770 | insert_timeout(&msg->wdata); |
765 | /* Leave locked async_futex when entering this function */ |
771 | /* Leave locked async_futex when entering this function */ |
766 | psthread_schedule_next_adv(PS_TO_MANAGER); |
772 | psthread_schedule_next_adv(PS_TO_MANAGER); |
767 | /* futex is up automatically after psthread_schedule_next...*/ |
773 | /* futex is up automatically after psthread_schedule_next...*/ |
768 | free(msg); |
774 | free(msg); |
769 | } |
775 | } |
770 | 776 | ||
771 | /** Set function that is called, IPC_M_CONNECT_ME_TO is received |
777 | /** Set function that is called, IPC_M_CONNECT_ME_TO is received |
772 | * |
778 | * |
773 | * @param conn Function that will form new psthread. |
779 | * @param conn Function that will form new psthread. |
774 | */ |
780 | */ |
775 | void async_set_client_connection(async_client_conn_t conn) |
781 | void async_set_client_connection(async_client_conn_t conn) |
776 | { |
782 | { |
777 | client_connection = conn; |
783 | client_connection = conn; |
778 | } |
784 | } |
779 | void async_set_interrupt_received(async_client_conn_t conn) |
785 | void async_set_interrupt_received(async_client_conn_t conn) |
780 | { |
786 | { |
781 | interrupt_received = conn; |
787 | interrupt_received = conn; |
782 | } |
788 | } |
783 | 789 | ||
784 | /* Primitive functions for simple communication */ |
790 | /* Primitive functions for simple communication */ |
785 | void async_msg_3(int phoneid, ipcarg_t method, ipcarg_t arg1, |
791 | void async_msg_3(int phoneid, ipcarg_t method, ipcarg_t arg1, |
786 | ipcarg_t arg2, ipcarg_t arg3) |
792 | ipcarg_t arg2, ipcarg_t arg3) |
787 | { |
793 | { |
788 | ipc_call_async_3(phoneid, method, arg1, arg2, arg3, NULL, NULL, !in_interrupt_handler); |
794 | ipc_call_async_3(phoneid, method, arg1, arg2, arg3, NULL, NULL, !in_interrupt_handler); |
789 | } |
795 | } |
790 | 796 | ||
791 | void async_msg_2(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2) |
797 | void async_msg_2(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2) |
792 | { |
798 | { |
793 | ipc_call_async_2(phoneid, method, arg1, arg2, NULL, NULL, !in_interrupt_handler); |
799 | ipc_call_async_2(phoneid, method, arg1, arg2, NULL, NULL, !in_interrupt_handler); |
794 | } |
800 | } |
- | 801 | ||
- | 802 | ||
- | 803 | /** @} |
|
- | 804 | */ |
|
- | 805 | ||
- | 806 | ||
795 | 807 |