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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 | /** @addtogroup libc |
29 | /** @addtogroup libc |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** @file |
32 | /** @file |
33 | */ |
33 | */ |
34 | 34 | ||
35 | /** |
35 | /** |
36 | * Asynchronous library |
36 | * Asynchronous library |
37 | * |
37 | * |
38 | * The aim of this library is facilitating writing programs utilizing |
38 | * The aim of this library is facilitating writing programs utilizing |
39 | * the asynchronous nature of Helenos IPC, yet using a normal way |
39 | * the asynchronous nature of Helenos IPC, yet using a normal way |
40 | * of programming. |
40 | * of programming. |
41 | * |
41 | * |
42 | * You should be able to write very simple multithreaded programs, |
42 | * You should be able to write very simple multithreaded programs, |
43 | * the async framework will automatically take care of most synchronization |
43 | * the async framework will automatically take care of most synchronization |
44 | * problems. |
44 | * problems. |
45 | * |
45 | * |
46 | * Default semantics: |
46 | * Default semantics: |
47 | * - send() - send asynchronously. If the kernel refuses to send more |
47 | * - send() - send asynchronously. If the kernel refuses to send more |
48 | * messages, [ try to get responses from kernel, if nothing |
48 | * messages, [ try to get responses from kernel, if nothing |
49 | * found, might try synchronous ] |
49 | * found, might try synchronous ] |
50 | * |
50 | * |
51 | * Example of use: |
51 | * Example of use: |
52 | * |
52 | * |
53 | * 1) Multithreaded client application |
53 | * 1) Multithreaded client application |
54 | * create_thread(thread1); |
54 | * create_thread(thread1); |
55 | * create_thread(thread2); |
55 | * create_thread(thread2); |
56 | * ... |
56 | * ... |
57 | * |
57 | * |
58 | * thread1() { |
58 | * thread1() { |
59 | * conn = ipc_connect_me_to(); |
59 | * conn = ipc_connect_me_to(); |
60 | * c1 = send(conn); |
60 | * c1 = send(conn); |
61 | * c2 = send(conn); |
61 | * c2 = send(conn); |
62 | * wait_for(c1); |
62 | * wait_for(c1); |
63 | * wait_for(c2); |
63 | * wait_for(c2); |
64 | * } |
64 | * } |
65 | * |
65 | * |
66 | * |
66 | * |
67 | * 2) Multithreaded server application |
67 | * 2) Multithreaded server application |
68 | * main() { |
68 | * main() { |
69 | * async_manager(); |
69 | * async_manager(); |
70 | * } |
70 | * } |
71 | * |
71 | * |
72 | * |
72 | * |
73 | * client_connection(icallid, *icall) { |
73 | * client_connection(icallid, *icall) { |
74 | * if (want_refuse) { |
74 | * if (want_refuse) { |
75 | * ipc_answer_fast(icallid, ELIMIT, 0, 0); |
75 | * ipc_answer_fast(icallid, ELIMIT, 0, 0); |
76 | * return; |
76 | * return; |
77 | * } |
77 | * } |
78 | * ipc_answer_fast(icallid, 0, 0, 0); |
78 | * ipc_answer_fast(icallid, 0, 0, 0); |
79 | * |
79 | * |
80 | * callid = async_get_call(&call); |
80 | * callid = async_get_call(&call); |
81 | * handle(callid, call); |
81 | * handle(callid, call); |
82 | * ipc_answer_fast(callid, 1,2,3); |
82 | * ipc_answer_fast(callid, 1,2,3); |
83 | * |
83 | * |
84 | * callid = async_get_call(&call); |
84 | * callid = async_get_call(&call); |
85 | * .... |
85 | * .... |
86 | * } |
86 | * } |
87 | * |
87 | * |
88 | * TODO: Detaching/joining dead psthreads? |
88 | * TODO: Detaching/joining dead psthreads? |
89 | */ |
89 | */ |
90 | #include <futex.h> |
90 | #include <futex.h> |
91 | #include <async.h> |
91 | #include <async.h> |
92 | #include <psthread.h> |
92 | #include <psthread.h> |
93 | #include <stdio.h> |
93 | #include <stdio.h> |
94 | #include <libadt/hash_table.h> |
94 | #include <libadt/hash_table.h> |
95 | #include <libadt/list.h> |
95 | #include <libadt/list.h> |
96 | #include <ipc/ipc.h> |
96 | #include <ipc/ipc.h> |
97 | #include <assert.h> |
97 | #include <assert.h> |
98 | #include <errno.h> |
98 | #include <errno.h> |
99 | #include <time.h> |
99 | #include <time.h> |
100 | #include <arch/barrier.h> |
100 | #include <arch/barrier.h> |
101 | 101 | ||
102 | atomic_t async_futex = FUTEX_INITIALIZER; |
102 | atomic_t async_futex = FUTEX_INITIALIZER; |
103 | static hash_table_t conn_hash_table; |
103 | static hash_table_t conn_hash_table; |
104 | static LIST_INITIALIZE(timeout_list); |
104 | static LIST_INITIALIZE(timeout_list); |
105 | 105 | ||
106 | typedef struct { |
106 | typedef struct { |
107 | struct timeval expires; /**< Expiration time for waiting thread */ |
107 | struct timeval expires; /**< Expiration time for waiting thread */ |
108 | int inlist; /**< If true, this struct is in timeout list */ |
108 | int inlist; /**< If true, this struct is in timeout list */ |
109 | link_t link; |
109 | link_t link; |
110 | 110 | ||
111 | pstid_t ptid; /**< Thread waiting for this message */ |
111 | pstid_t ptid; /**< Thread waiting for this message */ |
112 | int active; /**< If this thread is currently active */ |
112 | int active; /**< If this thread is currently active */ |
113 | int timedout; /**< If true, we timed out */ |
113 | int timedout; /**< If true, we timed out */ |
114 | } awaiter_t; |
114 | } awaiter_t; |
115 | 115 | ||
116 | typedef struct { |
116 | typedef struct { |
117 | awaiter_t wdata; |
117 | awaiter_t wdata; |
118 | 118 | ||
119 | int done; /**< If reply was received */ |
119 | int done; /**< If reply was received */ |
120 | ipc_call_t *dataptr; /**< Pointer where the answer data |
120 | ipc_call_t *dataptr; /**< Pointer where the answer data |
121 | * is stored */ |
121 | * is stored */ |
122 | ipcarg_t retval; |
122 | ipcarg_t retval; |
123 | } amsg_t; |
123 | } amsg_t; |
124 | 124 | ||
125 | typedef struct { |
125 | typedef struct { |
126 | link_t link; |
126 | link_t link; |
127 | ipc_callid_t callid; |
127 | ipc_callid_t callid; |
128 | ipc_call_t call; |
128 | ipc_call_t call; |
129 | } msg_t; |
129 | } msg_t; |
130 | 130 | ||
131 | typedef struct { |
131 | typedef struct { |
132 | awaiter_t wdata; |
132 | awaiter_t wdata; |
133 | 133 | ||
134 | link_t link; /**< Hash table link */ |
134 | link_t link; /**< Hash table link */ |
135 | ipcarg_t in_phone_hash; /**< Incoming phone hash. */ |
135 | ipcarg_t in_phone_hash; /**< Incoming phone hash. */ |
136 | 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 */ |
137 | /* Structures for connection opening packet */ |
137 | /* Structures for connection opening packet */ |
138 | ipc_callid_t callid; |
138 | ipc_callid_t callid; |
139 | ipc_call_t call; |
139 | ipc_call_t call; |
140 | ipc_callid_t close_callid; /* Identification of closing packet */ |
140 | ipc_callid_t close_callid; /* Identification of closing packet */ |
141 | void (*cthread)(ipc_callid_t,ipc_call_t *); |
141 | void (*cthread)(ipc_callid_t,ipc_call_t *); |
142 | } connection_t; |
142 | } connection_t; |
143 | 143 | ||
144 | /** Identifier of incoming connection handled by current thread */ |
144 | /** Identifier of incoming connection handled by current thread */ |
145 | __thread connection_t *PS_connection; |
145 | __thread connection_t *PS_connection; |
146 | /** If true, it is forbidden to use async_req functions and |
146 | /** If true, it is forbidden to use async_req functions and |
147 | * all preemption is disabled */ |
147 | * all preemption is disabled */ |
148 | __thread int in_interrupt_handler; |
148 | __thread int in_interrupt_handler; |
149 | 149 | ||
150 | 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); |
151 | 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); |
152 | static async_client_conn_t client_connection = default_client_connection; |
152 | static async_client_conn_t client_connection = default_client_connection; |
153 | static async_client_conn_t interrupt_received = default_interrupt_received; |
153 | static async_client_conn_t interrupt_received = default_interrupt_received; |
154 | 154 | ||
155 | /** Add microseconds to give timeval */ |
155 | /** Add microseconds to give timeval */ |
156 | static void tv_add(struct timeval *tv, suseconds_t usecs) |
156 | static void tv_add(struct timeval *tv, suseconds_t usecs) |
157 | { |
157 | { |
158 | tv->tv_sec += usecs / 1000000; |
158 | tv->tv_sec += usecs / 1000000; |
159 | tv->tv_usec += usecs % 1000000; |
159 | tv->tv_usec += usecs % 1000000; |
160 | if (tv->tv_usec > 1000000) { |
160 | if (tv->tv_usec > 1000000) { |
161 | tv->tv_sec++; |
161 | tv->tv_sec++; |
162 | tv->tv_usec -= 1000000; |
162 | tv->tv_usec -= 1000000; |
163 | } |
163 | } |
164 | } |
164 | } |
165 | 165 | ||
166 | /** Subtract 2 timevals, return microseconds difference */ |
166 | /** Subtract 2 timevals, return microseconds difference */ |
167 | static suseconds_t tv_sub(struct timeval *tv1, struct timeval *tv2) |
167 | static suseconds_t tv_sub(struct timeval *tv1, struct timeval *tv2) |
168 | { |
168 | { |
169 | suseconds_t result; |
169 | suseconds_t result; |
170 | 170 | ||
171 | result = tv1->tv_usec - tv2->tv_usec; |
171 | result = tv1->tv_usec - tv2->tv_usec; |
172 | result += (tv1->tv_sec - tv2->tv_sec) * 1000000; |
172 | result += (tv1->tv_sec - tv2->tv_sec) * 1000000; |
173 | 173 | ||
174 | return result; |
174 | return result; |
175 | } |
175 | } |
176 | 176 | ||
177 | /** Compare timeval |
177 | /** Compare timeval |
178 | * |
178 | * |
179 | * @return 1 if tv1 > tv2, otherwise 0 |
179 | * @return 1 if tv1 > tv2, otherwise 0 |
180 | */ |
180 | */ |
181 | static int tv_gt(struct timeval *tv1, struct timeval *tv2) |
181 | static int tv_gt(struct timeval *tv1, struct timeval *tv2) |
182 | { |
182 | { |
183 | if (tv1->tv_sec > tv2->tv_sec) |
183 | if (tv1->tv_sec > tv2->tv_sec) |
184 | return 1; |
184 | return 1; |
185 | 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) |
186 | return 1; |
186 | return 1; |
187 | return 0; |
187 | return 0; |
188 | } |
188 | } |
189 | static int tv_gteq(struct timeval *tv1, struct timeval *tv2) |
189 | static int tv_gteq(struct timeval *tv1, struct timeval *tv2) |
190 | { |
190 | { |
191 | if (tv1->tv_sec > tv2->tv_sec) |
191 | if (tv1->tv_sec > tv2->tv_sec) |
192 | return 1; |
192 | return 1; |
193 | 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) |
194 | return 1; |
194 | return 1; |
195 | return 0; |
195 | return 0; |
196 | } |
196 | } |
197 | 197 | ||
198 | /* Hash table functions */ |
198 | /* Hash table functions */ |
199 | #define CONN_HASH_TABLE_CHAINS 32 |
199 | #define CONN_HASH_TABLE_CHAINS 32 |
200 | 200 | ||
201 | static hash_index_t conn_hash(unsigned long *key) |
201 | static hash_index_t conn_hash(unsigned long *key) |
202 | { |
202 | { |
203 | assert(key); |
203 | assert(key); |
204 | return ((*key) >> 4) % CONN_HASH_TABLE_CHAINS; |
204 | return ((*key) >> 4) % CONN_HASH_TABLE_CHAINS; |
205 | } |
205 | } |
206 | 206 | ||
207 | 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) |
208 | { |
208 | { |
209 | connection_t *hs; |
209 | connection_t *hs; |
210 | 210 | ||
211 | hs = hash_table_get_instance(item, connection_t, link); |
211 | hs = hash_table_get_instance(item, connection_t, link); |
212 | 212 | ||
213 | return key[0] == hs->in_phone_hash; |
213 | return key[0] == hs->in_phone_hash; |
214 | } |
214 | } |
215 | 215 | ||
216 | static void conn_remove(link_t *item) |
216 | static void conn_remove(link_t *item) |
217 | { |
217 | { |
218 | free(hash_table_get_instance(item, connection_t, link)); |
218 | free(hash_table_get_instance(item, connection_t, link)); |
219 | } |
219 | } |
220 | 220 | ||
221 | 221 | ||
222 | /** Operations for NS hash table. */ |
222 | /** Operations for NS hash table. */ |
223 | static hash_table_operations_t conn_hash_table_ops = { |
223 | static hash_table_operations_t conn_hash_table_ops = { |
224 | .hash = conn_hash, |
224 | .hash = conn_hash, |
225 | .compare = conn_compare, |
225 | .compare = conn_compare, |
226 | .remove_callback = conn_remove |
226 | .remove_callback = conn_remove |
227 | }; |
227 | }; |
228 | 228 | ||
229 | /** Insert sort timeout msg into timeouts list |
229 | /** Insert sort timeout msg into timeouts list |
230 | * |
230 | * |
231 | */ |
231 | */ |
232 | static void insert_timeout(awaiter_t *wd) |
232 | static void insert_timeout(awaiter_t *wd) |
233 | { |
233 | { |
234 | link_t *tmp; |
234 | link_t *tmp; |
235 | awaiter_t *cur; |
235 | awaiter_t *cur; |
236 | 236 | ||
237 | wd->timedout = 0; |
237 | wd->timedout = 0; |
238 | wd->inlist = 1; |
238 | wd->inlist = 1; |
239 | 239 | ||
240 | tmp = timeout_list.next; |
240 | tmp = timeout_list.next; |
241 | while (tmp != &timeout_list) { |
241 | while (tmp != &timeout_list) { |
242 | cur = list_get_instance(tmp, awaiter_t, link); |
242 | cur = list_get_instance(tmp, awaiter_t, link); |
243 | if (tv_gteq(&cur->expires, &wd->expires)) |
243 | if (tv_gteq(&cur->expires, &wd->expires)) |
244 | break; |
244 | break; |
245 | tmp = tmp->next; |
245 | tmp = tmp->next; |
246 | } |
246 | } |
247 | list_append(&wd->link, tmp); |
247 | list_append(&wd->link, tmp); |
248 | } |
248 | } |
249 | 249 | ||
250 | /*************************************************/ |
250 | /*************************************************/ |
251 | 251 | ||
252 | /** Try to route a call to an appropriate connection thread |
252 | /** Try to route a call to an appropriate connection thread |
253 | * |
253 | * |
254 | */ |
254 | */ |
255 | 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) |
256 | { |
256 | { |
257 | connection_t *conn; |
257 | connection_t *conn; |
258 | msg_t *msg; |
258 | msg_t *msg; |
259 | link_t *hlp; |
259 | link_t *hlp; |
260 | unsigned long key; |
260 | unsigned long key; |
261 | 261 | ||
262 | futex_down(&async_futex); |
262 | futex_down(&async_futex); |
263 | 263 | ||
264 | key = call->in_phone_hash; |
264 | key = call->in_phone_hash; |
265 | hlp = hash_table_find(&conn_hash_table, &key); |
265 | hlp = hash_table_find(&conn_hash_table, &key); |
266 | if (!hlp) { |
266 | if (!hlp) { |
267 | futex_up(&async_futex); |
267 | futex_up(&async_futex); |
268 | return 0; |
268 | return 0; |
269 | } |
269 | } |
270 | conn = hash_table_get_instance(hlp, connection_t, link); |
270 | conn = hash_table_get_instance(hlp, connection_t, link); |
271 | 271 | ||
272 | msg = malloc(sizeof(*msg)); |
272 | msg = malloc(sizeof(*msg)); |
273 | msg->callid = callid; |
273 | msg->callid = callid; |
274 | msg->call = *call; |
274 | msg->call = *call; |
275 | list_append(&msg->link, &conn->msg_queue); |
275 | list_append(&msg->link, &conn->msg_queue); |
276 | 276 | ||
277 | if (IPC_GET_METHOD(*call) == IPC_M_PHONE_HUNGUP) |
277 | if (IPC_GET_METHOD(*call) == IPC_M_PHONE_HUNGUP) |
278 | conn->close_callid = callid; |
278 | conn->close_callid = callid; |
279 | 279 | ||
280 | /* If the call is waiting for event, run it */ |
280 | /* If the call is waiting for event, run it */ |
281 | if (!conn->wdata.active) { |
281 | if (!conn->wdata.active) { |
282 | /* If in timeout list, remove it */ |
282 | /* If in timeout list, remove it */ |
283 | if (conn->wdata.inlist) { |
283 | if (conn->wdata.inlist) { |
284 | conn->wdata.inlist = 0; |
284 | conn->wdata.inlist = 0; |
285 | list_remove(&conn->wdata.link); |
285 | list_remove(&conn->wdata.link); |
286 | } |
286 | } |
287 | conn->wdata.active = 1; |
287 | conn->wdata.active = 1; |
288 | psthread_add_ready(conn->wdata.ptid); |
288 | psthread_add_ready(conn->wdata.ptid); |
289 | } |
289 | } |
290 | 290 | ||
291 | futex_up(&async_futex); |
291 | futex_up(&async_futex); |
292 | 292 | ||
293 | return 1; |
293 | return 1; |
294 | } |
294 | } |
295 | 295 | ||
296 | /** Return new incoming message for current(thread-local) connection */ |
296 | /** Return new incoming message for current(thread-local) connection */ |
297 | 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) |
298 | { |
298 | { |
299 | msg_t *msg; |
299 | msg_t *msg; |
300 | ipc_callid_t callid; |
300 | ipc_callid_t callid; |
301 | connection_t *conn; |
301 | connection_t *conn; |
302 | 302 | ||
303 | assert(PS_connection); |
303 | assert(PS_connection); |
304 | /* GCC 4.1.0 coughs on PS_connection-> dereference, |
304 | /* GCC 4.1.0 coughs on PS_connection-> dereference, |
305 | * 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. |
306 | * I would never expect to find so many errors in |
306 | * I would never expect to find so many errors in |
307 | * compiler *($&$(*&$ |
307 | * compiler *($&$(*&$ |
308 | */ |
308 | */ |
309 | conn = PS_connection; |
309 | conn = PS_connection; |
310 | 310 | ||
311 | futex_down(&async_futex); |
311 | futex_down(&async_futex); |
312 | 312 | ||
313 | if (usecs) { |
313 | if (usecs) { |
314 | gettimeofday(&conn->wdata.expires, NULL); |
314 | gettimeofday(&conn->wdata.expires, NULL); |
315 | tv_add(&conn->wdata.expires, usecs); |
315 | tv_add(&conn->wdata.expires, usecs); |
316 | } else { |
316 | } else { |
317 | conn->wdata.inlist = 0; |
317 | conn->wdata.inlist = 0; |
318 | } |
318 | } |
319 | /* If nothing in queue, wait until something appears */ |
319 | /* If nothing in queue, wait until something appears */ |
320 | while (list_empty(&conn->msg_queue)) { |
320 | while (list_empty(&conn->msg_queue)) { |
321 | if (usecs) |
321 | if (usecs) |
322 | insert_timeout(&conn->wdata); |
322 | insert_timeout(&conn->wdata); |
323 | 323 | ||
324 | conn->wdata.active = 0; |
324 | conn->wdata.active = 0; |
325 | psthread_schedule_next_adv(PS_TO_MANAGER); |
325 | psthread_schedule_next_adv(PS_TO_MANAGER); |
326 | /* Futex is up after getting back from async_manager |
326 | /* Futex is up after getting back from async_manager |
327 | * get it again */ |
327 | * get it again */ |
328 | futex_down(&async_futex); |
328 | futex_down(&async_futex); |
329 | if (usecs && conn->wdata.timedout && \ |
329 | if (usecs && conn->wdata.timedout && \ |
330 | list_empty(&conn->msg_queue)) { |
330 | list_empty(&conn->msg_queue)) { |
331 | /* If we timed out-> exit */ |
331 | /* If we timed out-> exit */ |
332 | futex_up(&async_futex); |
332 | futex_up(&async_futex); |
333 | return 0; |
333 | return 0; |
334 | } |
334 | } |
335 | } |
335 | } |
336 | 336 | ||
337 | msg = list_get_instance(conn->msg_queue.next, msg_t, link); |
337 | msg = list_get_instance(conn->msg_queue.next, msg_t, link); |
338 | list_remove(&msg->link); |
338 | list_remove(&msg->link); |
339 | callid = msg->callid; |
339 | callid = msg->callid; |
340 | *call = msg->call; |
340 | *call = msg->call; |
341 | free(msg); |
341 | free(msg); |
342 | 342 | ||
343 | futex_up(&async_futex); |
343 | futex_up(&async_futex); |
344 | return callid; |
344 | return callid; |
345 | } |
345 | } |
346 | 346 | ||
347 | /** Thread function that gets created on new connection |
347 | /** Thread function that gets created on new connection |
348 | * |
348 | * |
349 | * 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 |
350 | * user code. |
350 | * user code. |
351 | */ |
351 | */ |
352 | 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) |
353 | { |
353 | { |
354 | ipc_answer_fast(callid, ENOENT, 0, 0); |
354 | ipc_answer_fast(callid, ENOENT, 0, 0); |
355 | } |
355 | } |
356 | 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) |
357 | { |
357 | { |
358 | } |
358 | } |
359 | 359 | ||
360 | /** Wrapper for client connection thread |
360 | /** Wrapper for client connection thread |
361 | * |
361 | * |
362 | * When new connection arrives, thread with this function is created. |
362 | * When new connection arrives, thread with this function is created. |
363 | * It calls client_connection and does final cleanup. |
363 | * It calls client_connection and does final cleanup. |
364 | * |
364 | * |
365 | * @param arg Connection structure pointer |
365 | * @param arg Connection structure pointer |
366 | */ |
366 | */ |
367 | static int connection_thread(void *arg) |
367 | static int connection_thread(void *arg) |
368 | { |
368 | { |
369 | unsigned long key; |
369 | unsigned long key; |
370 | msg_t *msg; |
370 | msg_t *msg; |
371 | int close_answered = 0; |
371 | int close_answered = 0; |
372 | 372 | ||
373 | /* Setup thread local connection pointer */ |
373 | /* Setup thread local connection pointer */ |
374 | PS_connection = (connection_t *)arg; |
374 | PS_connection = (connection_t *)arg; |
375 | PS_connection->cthread(PS_connection->callid, &PS_connection->call); |
375 | PS_connection->cthread(PS_connection->callid, &PS_connection->call); |
376 | 376 | ||
377 | /* Remove myself from connection hash table */ |
377 | /* Remove myself from connection hash table */ |
378 | futex_down(&async_futex); |
378 | futex_down(&async_futex); |
379 | key = PS_connection->in_phone_hash; |
379 | key = PS_connection->in_phone_hash; |
380 | hash_table_remove(&conn_hash_table, &key, 1); |
380 | hash_table_remove(&conn_hash_table, &key, 1); |
381 | futex_up(&async_futex); |
381 | futex_up(&async_futex); |
382 | 382 | ||
383 | /* Answer all remaining messages with ehangup */ |
383 | /* Answer all remaining messages with ehangup */ |
384 | while (!list_empty(&PS_connection->msg_queue)) { |
384 | while (!list_empty(&PS_connection->msg_queue)) { |
385 | msg = list_get_instance(PS_connection->msg_queue.next, msg_t, link); |
385 | msg = list_get_instance(PS_connection->msg_queue.next, msg_t, link); |
386 | list_remove(&msg->link); |
386 | list_remove(&msg->link); |
387 | if (msg->callid == PS_connection->close_callid) |
387 | if (msg->callid == PS_connection->close_callid) |
388 | close_answered = 1; |
388 | close_answered = 1; |
389 | ipc_answer_fast(msg->callid, EHANGUP, 0, 0); |
389 | ipc_answer_fast(msg->callid, EHANGUP, 0, 0); |
390 | free(msg); |
390 | free(msg); |
391 | } |
391 | } |
392 | if (PS_connection->close_callid) |
392 | if (PS_connection->close_callid) |
393 | ipc_answer_fast(PS_connection->close_callid, 0, 0, 0); |
393 | ipc_answer_fast(PS_connection->close_callid, 0, 0, 0); |
394 | 394 | ||
395 | return 0; |
395 | return 0; |
396 | } |
396 | } |
397 | 397 | ||
398 | /** Create new thread for a new connection |
398 | /** Create new thread for a new connection |
399 | * |
399 | * |
400 | * Creates new thread for connection, fills in connection |
400 | * Creates new thread for connection, fills in connection |
401 | * structures and inserts it into the hash table, so that |
401 | * structures and inserts it into the hash table, so that |
402 | * later we can easily do routing of messages to particular |
402 | * later we can easily do routing of messages to particular |
403 | * threads. |
403 | * threads. |
404 | * |
404 | * |
405 | * @param in_phone_hash Identification of the incoming connection |
405 | * @param in_phone_hash Identification of the incoming connection |
406 | * @param callid Callid of the IPC_M_CONNECT_ME_TO packet |
406 | * @param callid Callid of the IPC_M_CONNECT_ME_TO packet |
407 | * @param call Call data of the opening packet |
407 | * @param call Call data of the opening packet |
408 | * @param cthread Thread function that should be called upon |
408 | * @param cthread Thread function that should be called upon |
409 | * opening the connection |
409 | * opening the connection |
410 | * @return New thread id |
410 | * @return New thread id |
411 | */ |
411 | */ |
412 | pstid_t async_new_connection(ipcarg_t in_phone_hash,ipc_callid_t callid, ipc_call_t *call, void (*cthread)(ipc_callid_t, ipc_call_t *)) |
412 | pstid_t async_new_connection(ipcarg_t in_phone_hash,ipc_callid_t callid, ipc_call_t *call, void (*cthread)(ipc_callid_t, ipc_call_t *)) |
413 | { |
413 | { |
414 | connection_t *conn; |
414 | connection_t *conn; |
415 | unsigned long key; |
415 | unsigned long key; |
416 | 416 | ||
417 | conn = malloc(sizeof(*conn)); |
417 | conn = malloc(sizeof(*conn)); |
418 | if (!conn) { |
418 | if (!conn) { |
419 | ipc_answer_fast(callid, ENOMEM, 0, 0); |
419 | ipc_answer_fast(callid, ENOMEM, 0, 0); |
420 | return NULL; |
420 | return NULL; |
421 | } |
421 | } |
422 | conn->in_phone_hash = in_phone_hash; |
422 | conn->in_phone_hash = in_phone_hash; |
423 | list_initialize(&conn->msg_queue); |
423 | list_initialize(&conn->msg_queue); |
424 | conn->callid = callid; |
424 | conn->callid = callid; |
425 | conn->close_callid = 0; |
425 | conn->close_callid = 0; |
426 | if (call) |
426 | if (call) |
427 | conn->call = *call; |
427 | conn->call = *call; |
428 | conn->wdata.active = 1; /* We will activate it asap */ |
428 | conn->wdata.active = 1; /* We will activate it asap */ |
429 | conn->cthread = cthread; |
429 | conn->cthread = cthread; |
430 | 430 | ||
431 | conn->wdata.ptid = psthread_create(connection_thread, conn); |
431 | conn->wdata.ptid = psthread_create(connection_thread, conn); |
432 | if (!conn->wdata.ptid) { |
432 | if (!conn->wdata.ptid) { |
433 | free(conn); |
433 | free(conn); |
434 | ipc_answer_fast(callid, ENOMEM, 0, 0); |
434 | ipc_answer_fast(callid, ENOMEM, 0, 0); |
435 | return NULL; |
435 | return NULL; |
436 | } |
436 | } |
437 | /* Add connection to hash table */ |
437 | /* Add connection to hash table */ |
438 | key = conn->in_phone_hash; |
438 | key = conn->in_phone_hash; |
439 | futex_down(&async_futex); |
439 | futex_down(&async_futex); |
440 | hash_table_insert(&conn_hash_table, &key, &conn->link); |
440 | hash_table_insert(&conn_hash_table, &key, &conn->link); |
441 | futex_up(&async_futex); |
441 | futex_up(&async_futex); |
442 | 442 | ||
443 | psthread_add_ready(conn->wdata.ptid); |
443 | psthread_add_ready(conn->wdata.ptid); |
444 | 444 | ||
445 | return conn->wdata.ptid; |
445 | return conn->wdata.ptid; |
446 | } |
446 | } |
447 | 447 | ||
448 | /** Handle call that was received */ |
448 | /** Handle call that was received */ |
449 | static void handle_call(ipc_callid_t callid, ipc_call_t *call) |
449 | static void handle_call(ipc_callid_t callid, ipc_call_t *call) |
450 | { |
450 | { |
451 | /* Unrouted call - do some default behaviour */ |
451 | /* Unrouted call - do some default behaviour */ |
452 | if ((callid & IPC_CALLID_NOTIFICATION)) { |
452 | if ((callid & IPC_CALLID_NOTIFICATION)) { |
453 | in_interrupt_handler = 1; |
453 | in_interrupt_handler = 1; |
454 | (*interrupt_received)(callid,call); |
454 | (*interrupt_received)(callid,call); |
455 | in_interrupt_handler = 0; |
455 | in_interrupt_handler = 0; |
456 | return; |
456 | return; |
457 | } |
457 | } |
458 | 458 | ||
459 | switch (IPC_GET_METHOD(*call)) { |
459 | switch (IPC_GET_METHOD(*call)) { |
460 | case IPC_M_CONNECT_ME_TO: |
460 | case IPC_M_CONNECT_ME_TO: |
461 | /* Open new connection with thread etc. */ |
461 | /* Open new connection with thread etc. */ |
462 | async_new_connection(IPC_GET_ARG3(*call), callid, call, client_connection); |
462 | async_new_connection(IPC_GET_ARG3(*call), callid, call, client_connection); |
463 | return; |
463 | return; |
464 | } |
464 | } |
465 | 465 | ||
466 | /* Try to route call through connection tables */ |
466 | /* Try to route call through connection tables */ |
467 | if (route_call(callid, call)) |
467 | if (route_call(callid, call)) |
468 | return; |
468 | return; |
469 | 469 | ||
470 | /* Unknown call from unknown phone - hang it up */ |
470 | /* Unknown call from unknown phone - hang it up */ |
471 | ipc_answer_fast(callid, EHANGUP, 0, 0); |
471 | ipc_answer_fast(callid, EHANGUP, 0, 0); |
472 | } |
472 | } |
473 | 473 | ||
474 | /** Fire all timeouts that expired |
474 | /** Fire all timeouts that expired |
475 | * |
475 | * |
476 | */ |
476 | */ |
477 | static void handle_expired_timeouts(void) |
477 | static void handle_expired_timeouts(void) |
478 | { |
478 | { |
479 | struct timeval tv; |
479 | struct timeval tv; |
480 | awaiter_t *waiter; |
480 | awaiter_t *waiter; |
481 | link_t *cur; |
481 | link_t *cur; |
482 | 482 | ||
483 | gettimeofday(&tv,NULL); |
483 | gettimeofday(&tv,NULL); |
484 | futex_down(&async_futex); |
484 | futex_down(&async_futex); |
485 | 485 | ||
486 | cur = timeout_list.next; |
486 | cur = timeout_list.next; |
487 | while (cur != &timeout_list) { |
487 | while (cur != &timeout_list) { |
488 | waiter = list_get_instance(cur,awaiter_t,link); |
488 | waiter = list_get_instance(cur,awaiter_t,link); |
489 | if (tv_gt(&waiter->expires, &tv)) |
489 | if (tv_gt(&waiter->expires, &tv)) |
490 | break; |
490 | break; |
491 | cur = cur->next; |
491 | cur = cur->next; |
492 | list_remove(&waiter->link); |
492 | list_remove(&waiter->link); |
493 | waiter->inlist = 0; |
493 | waiter->inlist = 0; |
494 | waiter->timedout = 1; |
494 | waiter->timedout = 1; |
495 | /* Redundant condition? The thread should not |
495 | /* Redundant condition? The thread should not |
496 | * be active when it gets here. |
496 | * be active when it gets here. |
497 | */ |
497 | */ |
498 | if (!waiter->active) { |
498 | if (!waiter->active) { |
499 | waiter->active = 1; |
499 | waiter->active = 1; |
500 | psthread_add_ready(waiter->ptid); |
500 | psthread_add_ready(waiter->ptid); |
501 | } |
501 | } |
502 | } |
502 | } |
503 | 503 | ||
504 | futex_up(&async_futex); |
504 | futex_up(&async_futex); |
505 | } |
505 | } |
506 | 506 | ||
507 | /** Endless loop dispatching incoming calls and answers */ |
507 | /** Endless loop dispatching incoming calls and answers */ |
508 | static int async_manager_worker(void) |
508 | static int async_manager_worker(void) |
509 | { |
509 | { |
510 | ipc_call_t call; |
510 | ipc_call_t call; |
511 | ipc_callid_t callid; |
511 | ipc_callid_t callid; |
512 | int timeout; |
512 | int timeout; |
513 | awaiter_t *waiter; |
513 | awaiter_t *waiter; |
514 | struct timeval tv; |
514 | struct timeval tv; |
515 | 515 | ||
516 | while (1) { |
516 | while (1) { |
517 | if (psthread_schedule_next_adv(PS_FROM_MANAGER)) { |
517 | if (psthread_schedule_next_adv(PS_FROM_MANAGER)) { |
518 | futex_up(&async_futex); |
518 | futex_up(&async_futex); |
519 | /* async_futex is always held |
519 | /* async_futex is always held |
520 | * when entering manager thread |
520 | * when entering manager thread |
521 | */ |
521 | */ |
522 | continue; |
522 | continue; |
523 | } |
523 | } |
524 | futex_down(&async_futex); |
524 | futex_down(&async_futex); |
525 | if (!list_empty(&timeout_list)) { |
525 | if (!list_empty(&timeout_list)) { |
526 | waiter = list_get_instance(timeout_list.next,awaiter_t,link); |
526 | waiter = list_get_instance(timeout_list.next,awaiter_t,link); |
527 | gettimeofday(&tv,NULL); |
527 | gettimeofday(&tv,NULL); |
528 | if (tv_gteq(&tv, &waiter->expires)) { |
528 | if (tv_gteq(&tv, &waiter->expires)) { |
529 | futex_up(&async_futex); |
529 | futex_up(&async_futex); |
530 | handle_expired_timeouts(); |
530 | handle_expired_timeouts(); |
531 | continue; |
531 | continue; |
532 | } else |
532 | } else |
533 | timeout = tv_sub(&waiter->expires, &tv); |
533 | timeout = tv_sub(&waiter->expires, &tv); |
534 | } else |
534 | } else |
535 | timeout = SYNCH_NO_TIMEOUT; |
535 | timeout = SYNCH_NO_TIMEOUT; |
536 | futex_up(&async_futex); |
536 | futex_up(&async_futex); |
537 | 537 | ||
538 | callid = ipc_wait_cycle(&call, timeout, SYNCH_FLAGS_NONE); |
538 | callid = ipc_wait_cycle(&call, timeout, SYNCH_FLAGS_NONE); |
539 | 539 | ||
540 | if (!callid) { |
540 | if (!callid) { |
541 | handle_expired_timeouts(); |
541 | handle_expired_timeouts(); |
542 | continue; |
542 | continue; |
543 | } |
543 | } |
544 | 544 | ||
545 | if (callid & IPC_CALLID_ANSWERED) { |
545 | if (callid & IPC_CALLID_ANSWERED) { |
546 | continue; |
546 | continue; |
547 | } |
547 | } |
548 | 548 | ||
549 | handle_call(callid, &call); |
549 | handle_call(callid, &call); |
550 | } |
550 | } |
551 | 551 | ||
552 | return 0; |
552 | return 0; |
553 | } |
553 | } |
554 | 554 | ||
555 | /** Function to start async_manager as a standalone thread |
555 | /** Function to start async_manager as a standalone thread |
556 | * |
556 | * |
557 | * When more kernel threads are used, one async manager should |
557 | * When more kernel threads are used, one async manager should |
558 | * exist per thread. The particular implementation may change, |
558 | * exist per thread. The particular implementation may change, |
559 | * currently one async_manager is started automatically per kernel |
559 | * currently one async_manager is started automatically per kernel |
560 | * thread except main thread. |
560 | * thread except main thread. |
561 | */ |
561 | */ |
562 | static int async_manager_thread(void *arg) |
562 | static int async_manager_thread(void *arg) |
563 | { |
563 | { |
564 | futex_up(&async_futex); |
564 | futex_up(&async_futex); |
565 | /* async_futex is always locked when entering |
565 | /* async_futex is always locked when entering |
566 | * manager */ |
566 | * manager */ |
567 | async_manager_worker(); |
567 | async_manager_worker(); |
568 | 568 | ||
569 | return 0; |
569 | return 0; |
570 | } |
570 | } |
571 | 571 | ||
572 | /** Add one manager to manager list */ |
572 | /** Add one manager to manager list */ |
573 | void async_create_manager(void) |
573 | void async_create_manager(void) |
574 | { |
574 | { |
575 | pstid_t ptid; |
575 | pstid_t ptid; |
576 | 576 | ||
577 | ptid = psthread_create(async_manager_thread, NULL); |
577 | ptid = psthread_create(async_manager_thread, NULL); |
578 | psthread_add_manager(ptid); |
578 | psthread_add_manager(ptid); |
579 | } |
579 | } |
580 | 580 | ||
581 | /** Remove one manager from manager list */ |
581 | /** Remove one manager from manager list */ |
582 | void async_destroy_manager(void) |
582 | void async_destroy_manager(void) |
583 | { |
583 | { |
584 | psthread_remove_manager(); |
584 | psthread_remove_manager(); |
585 | } |
585 | } |
586 | 586 | ||
587 | /** Initialize internal structures needed for async manager */ |
587 | /** Initialize internal structures needed for async manager */ |
588 | int _async_init(void) |
588 | int _async_init(void) |
589 | { |
589 | { |
590 | if (!hash_table_create(&conn_hash_table, CONN_HASH_TABLE_CHAINS, 1, &conn_hash_table_ops)) { |
590 | if (!hash_table_create(&conn_hash_table, CONN_HASH_TABLE_CHAINS, 1, &conn_hash_table_ops)) { |
591 | printf("%s: cannot create hash table\n", "async"); |
591 | printf("%s: cannot create hash table\n", "async"); |
592 | return ENOMEM; |
592 | return ENOMEM; |
593 | } |
593 | } |
594 | 594 | ||
595 | return 0; |
595 | return 0; |
596 | } |
596 | } |
597 | 597 | ||
598 | /** IPC handler for messages in async framework |
598 | /** IPC handler for messages in async framework |
599 | * |
599 | * |
600 | * Notify thread that is waiting for this message, that it arrived |
600 | * Notify thread that is waiting for this message, that it arrived |
601 | */ |
601 | */ |
602 | static void reply_received(void *private, int retval, |
602 | static void reply_received(void *private, int retval, |
603 | ipc_call_t *data) |
603 | ipc_call_t *data) |
604 | { |
604 | { |
605 | amsg_t *msg = (amsg_t *) private; |
605 | amsg_t *msg = (amsg_t *) private; |
606 | 606 | ||
607 | msg->retval = retval; |
607 | msg->retval = retval; |
608 | 608 | ||
609 | futex_down(&async_futex); |
609 | futex_down(&async_futex); |
610 | /* Copy data after futex_down, just in case the |
610 | /* Copy data after futex_down, just in case the |
611 | * call was detached |
611 | * call was detached |
612 | */ |
612 | */ |
613 | if (msg->dataptr) |
613 | if (msg->dataptr) |
614 | *msg->dataptr = *data; |
614 | *msg->dataptr = *data; |
615 | 615 | ||
616 | write_barrier(); |
616 | write_barrier(); |
617 | /* Remove message from timeout list */ |
617 | /* Remove message from timeout list */ |
618 | if (msg->wdata.inlist) |
618 | if (msg->wdata.inlist) |
619 | list_remove(&msg->wdata.link); |
619 | list_remove(&msg->wdata.link); |
620 | msg->done = 1; |
620 | msg->done = 1; |
621 | if (! msg->wdata.active) { |
621 | if (! msg->wdata.active) { |
622 | msg->wdata.active = 1; |
622 | msg->wdata.active = 1; |
623 | psthread_add_ready(msg->wdata.ptid); |
623 | psthread_add_ready(msg->wdata.ptid); |
624 | } |
624 | } |
625 | futex_up(&async_futex); |
625 | futex_up(&async_futex); |
626 | } |
626 | } |
627 | 627 | ||
628 | /** Send message and return id of the sent message |
628 | /** Send message and return id of the sent message |
629 | * |
629 | * |
630 | * The return value can be used as input for async_wait() to wait |
630 | * The return value can be used as input for async_wait() to wait |
631 | * for completion. |
631 | * for completion. |
632 | */ |
632 | */ |
633 | aid_t async_send_2(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2, |
633 | aid_t async_send_2(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2, |
634 | ipc_call_t *dataptr) |
634 | ipc_call_t *dataptr) |
635 | { |
635 | { |
636 | amsg_t *msg; |
636 | amsg_t *msg; |
637 | 637 | ||
638 | if (in_interrupt_handler) { |
638 | if (in_interrupt_handler) { |
639 | printf("Cannot send asynchronou request in interrupt handler.\n"); |
639 | printf("Cannot send asynchronou request in interrupt handler.\n"); |
640 | _exit(1); |
640 | _exit(1); |
641 | } |
641 | } |
642 | 642 | ||
643 | msg = malloc(sizeof(*msg)); |
643 | msg = malloc(sizeof(*msg)); |
644 | msg->done = 0; |
644 | msg->done = 0; |
645 | msg->dataptr = dataptr; |
645 | msg->dataptr = dataptr; |
646 | 646 | ||
647 | msg->wdata.active = 1; /* We may sleep in next method, but it |
647 | msg->wdata.active = 1; /* We may sleep in next method, but it |
648 | * will use it's own mechanism */ |
648 | * will use it's own mechanism */ |
649 | ipc_call_async_2(phoneid,method,arg1,arg2,msg,reply_received,1); |
649 | ipc_call_async_2(phoneid,method,arg1,arg2,msg,reply_received,1); |
650 | 650 | ||
651 | return (aid_t) msg; |
651 | return (aid_t) msg; |
652 | } |
652 | } |
653 | 653 | ||
654 | /** Send message and return id of the sent message |
654 | /** Send message and return id of the sent message |
655 | * |
655 | * |
656 | * The return value can be used as input for async_wait() to wait |
656 | * The return value can be used as input for async_wait() to wait |
657 | * for completion. |
657 | * for completion. |
658 | */ |
658 | */ |
659 | aid_t async_send_3(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2, |
659 | aid_t async_send_3(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2, |
660 | ipcarg_t arg3, ipc_call_t *dataptr) |
660 | ipcarg_t arg3, ipc_call_t *dataptr) |
661 | { |
661 | { |
662 | amsg_t *msg; |
662 | amsg_t *msg; |
663 | 663 | ||
664 | if (in_interrupt_handler) { |
664 | if (in_interrupt_handler) { |
665 | printf("Cannot send asynchronou request in interrupt handler.\n"); |
665 | printf("Cannot send asynchronou request in interrupt handler.\n"); |
666 | _exit(1); |
666 | _exit(1); |
667 | } |
667 | } |
668 | 668 | ||
669 | msg = malloc(sizeof(*msg)); |
669 | msg = malloc(sizeof(*msg)); |
670 | msg->done = 0; |
670 | msg->done = 0; |
671 | msg->dataptr = dataptr; |
671 | msg->dataptr = dataptr; |
672 | 672 | ||
673 | msg->wdata.active = 1; /* We may sleep in next method, but it |
673 | msg->wdata.active = 1; /* We may sleep in next method, but it |
674 | * will use it's own mechanism */ |
674 | * will use it's own mechanism */ |
675 | ipc_call_async_3(phoneid,method,arg1,arg2,arg3, msg,reply_received,1); |
675 | ipc_call_async_3(phoneid,method,arg1,arg2,arg3, msg,reply_received,1); |
676 | 676 | ||
677 | return (aid_t) msg; |
677 | return (aid_t) msg; |
678 | } |
678 | } |
679 | 679 | ||
680 | /** Wait for a message sent by async framework |
680 | /** Wait for a message sent by async framework |
681 | * |
681 | * |
682 | * @param amsgid Message ID to wait for |
682 | * @param amsgid Message ID to wait for |
683 | * @param retval Pointer to variable where will be stored retval |
683 | * @param retval Pointer to variable where will be stored retval |
684 | * of the answered message. If NULL, it is ignored. |
684 | * of the answered message. If NULL, it is ignored. |
685 | * |
685 | * |
686 | */ |
686 | */ |
687 | void async_wait_for(aid_t amsgid, ipcarg_t *retval) |
687 | void async_wait_for(aid_t amsgid, ipcarg_t *retval) |
688 | { |
688 | { |
689 | amsg_t *msg = (amsg_t *) amsgid; |
689 | amsg_t *msg = (amsg_t *) amsgid; |
690 | 690 | ||
691 | futex_down(&async_futex); |
691 | futex_down(&async_futex); |
692 | if (msg->done) { |
692 | if (msg->done) { |
693 | futex_up(&async_futex); |
693 | futex_up(&async_futex); |
694 | goto done; |
694 | goto done; |
695 | } |
695 | } |
696 | 696 | ||
697 | msg->wdata.ptid = psthread_get_id(); |
697 | msg->wdata.ptid = psthread_get_id(); |
698 | msg->wdata.active = 0; |
698 | msg->wdata.active = 0; |
699 | msg->wdata.inlist = 0; |
699 | msg->wdata.inlist = 0; |
700 | /* Leave locked async_futex when entering this function */ |
700 | /* Leave locked async_futex when entering this function */ |
701 | psthread_schedule_next_adv(PS_TO_MANAGER); |
701 | psthread_schedule_next_adv(PS_TO_MANAGER); |
702 | /* futex is up automatically after psthread_schedule_next...*/ |
702 | /* futex is up automatically after psthread_schedule_next...*/ |
703 | done: |
703 | done: |
704 | if (retval) |
704 | if (retval) |
705 | *retval = msg->retval; |
705 | *retval = msg->retval; |
706 | free(msg); |
706 | free(msg); |
707 | } |
707 | } |
708 | 708 | ||
709 | /** Wait for a message sent by async framework with timeout |
709 | /** Wait for a message sent by async framework with timeout |
710 | * |
710 | * |
711 | * @param amsgid Message ID to wait for |
711 | * @param amsgid Message ID to wait for |
712 | * @param retval Pointer to variable where will be stored retval |
712 | * @param retval Pointer to variable where will be stored retval |
713 | * of the answered message. If NULL, it is ignored. |
713 | * of the answered message. If NULL, it is ignored. |
714 | * @param timeout Timeout in usecs |
714 | * @param timeout Timeout in usecs |
715 | * @return 0 on success, ETIMEOUT if timeout expired |
715 | * @return 0 on success, ETIMEOUT if timeout expired |
716 | * |
716 | * |
717 | */ |
717 | */ |
718 | int async_wait_timeout(aid_t amsgid, ipcarg_t *retval, suseconds_t timeout) |
718 | int async_wait_timeout(aid_t amsgid, ipcarg_t *retval, suseconds_t timeout) |
719 | { |
719 | { |
720 | amsg_t *msg = (amsg_t *) amsgid; |
720 | amsg_t *msg = (amsg_t *) amsgid; |
721 | 721 | ||
722 | /* TODO: Let it go through the event read at least once */ |
722 | /* TODO: Let it go through the event read at least once */ |
723 | if (timeout < 0) |
723 | if (timeout < 0) |
724 | return ETIMEOUT; |
724 | return ETIMEOUT; |
725 | 725 | ||
726 | futex_down(&async_futex); |
726 | futex_down(&async_futex); |
727 | if (msg->done) { |
727 | if (msg->done) { |
728 | futex_up(&async_futex); |
728 | futex_up(&async_futex); |
729 | goto done; |
729 | goto done; |
730 | } |
730 | } |
731 | 731 | ||
732 | gettimeofday(&msg->wdata.expires, NULL); |
732 | gettimeofday(&msg->wdata.expires, NULL); |
733 | tv_add(&msg->wdata.expires, timeout); |
733 | tv_add(&msg->wdata.expires, timeout); |
734 | 734 | ||
735 | msg->wdata.ptid = psthread_get_id(); |
735 | msg->wdata.ptid = psthread_get_id(); |
736 | msg->wdata.active = 0; |
736 | msg->wdata.active = 0; |
737 | insert_timeout(&msg->wdata); |
737 | insert_timeout(&msg->wdata); |
738 | 738 | ||
739 | /* Leave locked async_futex when entering this function */ |
739 | /* Leave locked async_futex when entering this function */ |
740 | psthread_schedule_next_adv(PS_TO_MANAGER); |
740 | psthread_schedule_next_adv(PS_TO_MANAGER); |
741 | /* futex is up automatically after psthread_schedule_next...*/ |
741 | /* futex is up automatically after psthread_schedule_next...*/ |
742 | 742 | ||
743 | if (!msg->done) |
743 | if (!msg->done) |
744 | return ETIMEOUT; |
744 | return ETIMEOUT; |
745 | 745 | ||
746 | done: |
746 | done: |
747 | if (retval) |
747 | if (retval) |
748 | *retval = msg->retval; |
748 | *retval = msg->retval; |
749 | free(msg); |
749 | free(msg); |
750 | 750 | ||
751 | return 0; |
751 | return 0; |
752 | } |
752 | } |
753 | 753 | ||
754 | /** Wait specified time, but in the meantime handle incoming events |
754 | /** Wait specified time, but in the meantime handle incoming events |
755 | * |
755 | * |
756 | * @param timeout Time in microseconds to wait |
756 | * @param timeout Time in microseconds to wait |
757 | */ |
757 | */ |
758 | void async_usleep(suseconds_t timeout) |
758 | void async_usleep(suseconds_t timeout) |
759 | { |
759 | { |
760 | amsg_t *msg; |
760 | amsg_t *msg; |
761 | 761 | ||
762 | if (in_interrupt_handler) { |
762 | if (in_interrupt_handler) { |
763 | printf("Cannot call async_usleep in interrupt handler.\n"); |
763 | printf("Cannot call async_usleep in interrupt handler.\n"); |
764 | _exit(1); |
764 | _exit(1); |
765 | } |
765 | } |
766 | 766 | ||
767 | msg = malloc(sizeof(*msg)); |
767 | msg = malloc(sizeof(*msg)); |
768 | if (!msg) |
768 | if (!msg) |
769 | return; |
769 | return; |
770 | 770 | ||
771 | msg->wdata.ptid = psthread_get_id(); |
771 | msg->wdata.ptid = psthread_get_id(); |
772 | msg->wdata.active = 0; |
772 | msg->wdata.active = 0; |
773 | 773 | ||
774 | gettimeofday(&msg->wdata.expires, NULL); |
774 | gettimeofday(&msg->wdata.expires, NULL); |
775 | tv_add(&msg->wdata.expires, timeout); |
775 | tv_add(&msg->wdata.expires, timeout); |
776 | 776 | ||
777 | futex_down(&async_futex); |
777 | futex_down(&async_futex); |
778 | insert_timeout(&msg->wdata); |
778 | insert_timeout(&msg->wdata); |
779 | /* Leave locked async_futex when entering this function */ |
779 | /* Leave locked async_futex when entering this function */ |
780 | psthread_schedule_next_adv(PS_TO_MANAGER); |
780 | psthread_schedule_next_adv(PS_TO_MANAGER); |
781 | /* futex is up automatically after psthread_schedule_next...*/ |
781 | /* futex is up automatically after psthread_schedule_next...*/ |
782 | free(msg); |
782 | free(msg); |
783 | } |
783 | } |
784 | 784 | ||
785 | /** Set function that is called, IPC_M_CONNECT_ME_TO is received |
785 | /** Set function that is called, IPC_M_CONNECT_ME_TO is received |
786 | * |
786 | * |
787 | * @param conn Function that will form new psthread. |
787 | * @param conn Function that will form new psthread. |
788 | */ |
788 | */ |
789 | void async_set_client_connection(async_client_conn_t conn) |
789 | void async_set_client_connection(async_client_conn_t conn) |
790 | { |
790 | { |
791 | client_connection = conn; |
791 | client_connection = conn; |
792 | } |
792 | } |
793 | void async_set_interrupt_received(async_client_conn_t conn) |
793 | void async_set_interrupt_received(async_client_conn_t conn) |
794 | { |
794 | { |
795 | interrupt_received = conn; |
795 | interrupt_received = conn; |
796 | } |
796 | } |
797 | 797 | ||
798 | /* Primitive functions for simple communication */ |
798 | /* Primitive functions for simple communication */ |
799 | void async_msg_3(int phoneid, ipcarg_t method, ipcarg_t arg1, |
799 | void async_msg_3(int phoneid, ipcarg_t method, ipcarg_t arg1, |
800 | ipcarg_t arg2, ipcarg_t arg3) |
800 | ipcarg_t arg2, ipcarg_t arg3) |
801 | { |
801 | { |
802 | ipc_call_async_3(phoneid, method, arg1, arg2, arg3, NULL, NULL, !in_interrupt_handler); |
802 | ipc_call_async_3(phoneid, method, arg1, arg2, arg3, NULL, NULL, !in_interrupt_handler); |
803 | } |
803 | } |
804 | 804 | ||
805 | void async_msg_2(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2) |
805 | void async_msg_2(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2) |
806 | { |
806 | { |
807 | ipc_call_async_2(phoneid, method, arg1, arg2, NULL, NULL, !in_interrupt_handler); |
807 | ipc_call_async_2(phoneid, method, arg1, arg2, NULL, NULL, !in_interrupt_handler); |
808 | } |
808 | } |
809 | 809 | ||
810 | - | ||
811 | /** @} |
810 | /** @} |
812 | */ |
811 | */ |
813 | 812 |