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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 the |
38 | * The aim of this library is facilitating writing programs utilizing the |
39 | * asynchronous nature of HelenOS IPC, yet using a normal way of programming. |
39 | * asynchronous nature of HelenOS IPC, yet using a normal way of programming. |
40 | * |
40 | * |
41 | * You should be able to write very simple multithreaded programs, the async |
41 | * You should be able to write very simple multithreaded programs, the async |
42 | * framework will automatically take care of most synchronization problems. |
42 | * framework will automatically take care of most synchronization problems. |
43 | * |
43 | * |
44 | * Default semantics: |
44 | * Default semantics: |
45 | * - async_send_*(): send asynchronously. If the kernel refuses to send |
45 | * - async_send_*(): send asynchronously. If the kernel refuses to send |
46 | * more messages, [ try to get responses from kernel, if |
46 | * more messages, [ try to get responses from kernel, if |
47 | * nothing found, might try synchronous ] |
47 | * nothing found, might try synchronous ] |
48 | * |
48 | * |
49 | * Example of use (pseudo C): |
49 | * Example of use (pseudo C): |
50 | * |
50 | * |
51 | * 1) Multithreaded client application |
51 | * 1) Multithreaded client application |
52 | * |
52 | * |
53 | * fibril_create(fibril1, ...); |
53 | * fibril_create(fibril1, ...); |
54 | * fibril_create(fibril2, ...); |
54 | * fibril_create(fibril2, ...); |
55 | * ... |
55 | * ... |
56 | * |
56 | * |
57 | * int fibril1(void *arg) |
57 | * int fibril1(void *arg) |
58 | * { |
58 | * { |
59 | * conn = ipc_connect_me_to(); |
59 | * conn = ipc_connect_me_to(); |
60 | * c1 = async_send(conn); |
60 | * c1 = async_send(conn); |
61 | * c2 = async_send(conn); |
61 | * c2 = async_send(conn); |
62 | * async_wait_for(c1); |
62 | * async_wait_for(c1); |
63 | * async_wait_for(c2); |
63 | * async_wait_for(c2); |
64 | * ... |
64 | * ... |
65 | * } |
65 | * } |
66 | * |
66 | * |
67 | * |
67 | * |
68 | * 2) Multithreaded server application |
68 | * 2) Multithreaded server application |
69 | * main() |
69 | * main() |
70 | * { |
70 | * { |
71 | * async_manager(); |
71 | * async_manager(); |
72 | * } |
72 | * } |
73 | * |
73 | * |
74 | * |
74 | * |
75 | * client_connection(icallid, *icall) |
75 | * client_connection(icallid, *icall) |
76 | * { |
76 | * { |
77 | * if (want_refuse) { |
77 | * if (want_refuse) { |
78 | * ipc_answer_fast(icallid, ELIMIT, 0, 0); |
78 | * ipc_answer_fast(icallid, ELIMIT, 0, 0); |
79 | * return; |
79 | * return; |
80 | * } |
80 | * } |
81 | * ipc_answer_fast(icallid, EOK, 0, 0); |
81 | * ipc_answer_fast(icallid, EOK, 0, 0); |
82 | * |
82 | * |
83 | * callid = async_get_call(&call); |
83 | * callid = async_get_call(&call); |
84 | * handle_call(callid, call); |
84 | * handle_call(callid, call); |
85 | * ipc_answer_fast(callid, 1, 2, 3); |
85 | * ipc_answer_fast(callid, 1, 2, 3); |
86 | * |
86 | * |
87 | * callid = async_get_call(&call); |
87 | * callid = async_get_call(&call); |
88 | * .... |
88 | * .... |
89 | * } |
89 | * } |
90 | * |
90 | * |
91 | */ |
91 | */ |
92 | 92 | ||
93 | #include <futex.h> |
93 | #include <futex.h> |
94 | #include <async.h> |
94 | #include <async.h> |
95 | #include <fibril.h> |
95 | #include <fibril.h> |
96 | #include <stdio.h> |
96 | #include <stdio.h> |
97 | #include <libadt/hash_table.h> |
97 | #include <libadt/hash_table.h> |
98 | #include <libadt/list.h> |
98 | #include <libadt/list.h> |
99 | #include <ipc/ipc.h> |
99 | #include <ipc/ipc.h> |
100 | #include <assert.h> |
100 | #include <assert.h> |
101 | #include <errno.h> |
101 | #include <errno.h> |
102 | #include <time.h> |
102 | #include <time.h> |
103 | #include <arch/barrier.h> |
103 | #include <arch/barrier.h> |
104 | 104 | ||
105 | atomic_t async_futex = FUTEX_INITIALIZER; |
105 | atomic_t async_futex = FUTEX_INITIALIZER; |
106 | static hash_table_t conn_hash_table; |
106 | static hash_table_t conn_hash_table; |
107 | static LIST_INITIALIZE(timeout_list); |
107 | static LIST_INITIALIZE(timeout_list); |
108 | 108 | ||
109 | typedef struct { |
109 | typedef struct { |
110 | /** Expiration time for waiting fibril. */ |
110 | /** Expiration time for waiting fibril. */ |
111 | struct timeval expires; |
111 | struct timeval expires; |
112 | /** If true, this struct is in the timeout list. */ |
112 | /** If true, this struct is in the timeout list. */ |
113 | int inlist; |
113 | int inlist; |
114 | link_t link; |
114 | link_t link; |
115 | 115 | ||
116 | /** Fibril waiting for this message. */ |
116 | /** Fibril waiting for this message. */ |
117 | fid_t fid; |
117 | fid_t fid; |
118 | /** If this fibril is currently active. */ |
118 | /** If this fibril is currently active. */ |
119 | int active; |
119 | int active; |
120 | /** If true, we timed out. */ |
120 | /** If true, we timed out. */ |
121 | int timedout; |
121 | int timedout; |
122 | } awaiter_t; |
122 | } awaiter_t; |
123 | 123 | ||
124 | typedef struct { |
124 | typedef struct { |
125 | awaiter_t wdata; |
125 | awaiter_t wdata; |
126 | 126 | ||
127 | int done; /**< If reply was received */ |
127 | int done; /**< If reply was received */ |
128 | ipc_call_t *dataptr; /**< Pointer where the answer data |
128 | ipc_call_t *dataptr; /**< Pointer where the answer data |
129 | * is stored */ |
129 | * is stored */ |
130 | ipcarg_t retval; |
130 | ipcarg_t retval; |
131 | } amsg_t; |
131 | } amsg_t; |
132 | 132 | ||
133 | typedef struct { |
133 | typedef struct { |
134 | link_t link; |
134 | link_t link; |
135 | ipc_callid_t callid; |
135 | ipc_callid_t callid; |
136 | ipc_call_t call; |
136 | ipc_call_t call; |
137 | } msg_t; |
137 | } msg_t; |
138 | 138 | ||
139 | typedef struct { |
139 | typedef struct { |
140 | awaiter_t wdata; |
140 | awaiter_t wdata; |
141 | 141 | ||
142 | link_t link; /**< Hash table link. */ |
142 | link_t link; /**< Hash table link. */ |
143 | ipcarg_t in_phone_hash; /**< Incoming phone hash. */ |
143 | ipcarg_t in_phone_hash; /**< Incoming phone hash. */ |
144 | link_t msg_queue; /**< Messages that should be delivered |
144 | link_t msg_queue; /**< Messages that should be delivered |
145 | * to this fibril. */ |
145 | * to this fibril. */ |
146 | /* Structures for connection opening packet */ |
146 | /* Structures for connection opening packet */ |
147 | ipc_callid_t callid; |
147 | ipc_callid_t callid; |
148 | ipc_call_t call; |
148 | ipc_call_t call; |
149 | ipc_callid_t close_callid; /* Identification of closing packet. */ |
149 | ipc_callid_t close_callid; /* Identification of closing packet. */ |
150 | void (*cfibril)(ipc_callid_t, ipc_call_t *); |
150 | void (*cfibril)(ipc_callid_t, ipc_call_t *); |
151 | } connection_t; |
151 | } connection_t; |
152 | 152 | ||
153 | /** Identifier of the incoming connection handled by the current fibril. */ |
153 | /** Identifier of the incoming connection handled by the current fibril. */ |
154 | __thread connection_t *FIBRIL_connection; |
154 | __thread connection_t *FIBRIL_connection; |
155 | /** If true, it is forbidden to use async_req functions and |
155 | /** If true, it is forbidden to use async_req functions and |
156 | * all preemption is disabled */ |
156 | * all preemption is disabled */ |
157 | __thread int in_interrupt_handler; |
157 | __thread int in_interrupt_handler; |
158 | 158 | ||
159 | static void default_client_connection(ipc_callid_t callid, ipc_call_t *call); |
159 | static void default_client_connection(ipc_callid_t callid, ipc_call_t *call); |
160 | static void default_interrupt_received(ipc_callid_t callid, ipc_call_t *call); |
160 | static void default_interrupt_received(ipc_callid_t callid, ipc_call_t *call); |
161 | static async_client_conn_t client_connection = default_client_connection; |
161 | static async_client_conn_t client_connection = default_client_connection; |
162 | static async_client_conn_t interrupt_received = default_interrupt_received; |
162 | static async_client_conn_t interrupt_received = default_interrupt_received; |
163 | 163 | ||
164 | /** Add microseconds to give timeval */ |
164 | /** Add microseconds to give timeval */ |
165 | static void tv_add(struct timeval *tv, suseconds_t usecs) |
165 | static void tv_add(struct timeval *tv, suseconds_t usecs) |
166 | { |
166 | { |
167 | tv->tv_sec += usecs / 1000000; |
167 | tv->tv_sec += usecs / 1000000; |
168 | tv->tv_usec += usecs % 1000000; |
168 | tv->tv_usec += usecs % 1000000; |
169 | if (tv->tv_usec > 1000000) { |
169 | if (tv->tv_usec > 1000000) { |
170 | tv->tv_sec++; |
170 | tv->tv_sec++; |
171 | tv->tv_usec -= 1000000; |
171 | tv->tv_usec -= 1000000; |
172 | } |
172 | } |
173 | } |
173 | } |
174 | 174 | ||
175 | /** Subtract 2 timevals, return microseconds difference */ |
175 | /** Subtract 2 timevals, return microseconds difference */ |
176 | static suseconds_t tv_sub(struct timeval *tv1, struct timeval *tv2) |
176 | static suseconds_t tv_sub(struct timeval *tv1, struct timeval *tv2) |
177 | { |
177 | { |
178 | suseconds_t result; |
178 | suseconds_t result; |
179 | 179 | ||
180 | result = tv1->tv_usec - tv2->tv_usec; |
180 | result = tv1->tv_usec - tv2->tv_usec; |
181 | result += (tv1->tv_sec - tv2->tv_sec) * 1000000; |
181 | result += (tv1->tv_sec - tv2->tv_sec) * 1000000; |
182 | 182 | ||
183 | return result; |
183 | return result; |
184 | } |
184 | } |
185 | 185 | ||
186 | /** Compare timeval |
186 | /** Compare timeval |
187 | * |
187 | * |
188 | * @return 1 if tv1 > tv2, otherwise 0 |
188 | * @return 1 if tv1 > tv2, otherwise 0 |
189 | */ |
189 | */ |
190 | static int tv_gt(struct timeval *tv1, struct timeval *tv2) |
190 | static int tv_gt(struct timeval *tv1, struct timeval *tv2) |
191 | { |
191 | { |
192 | if (tv1->tv_sec > tv2->tv_sec) |
192 | if (tv1->tv_sec > tv2->tv_sec) |
193 | return 1; |
193 | return 1; |
194 | if (tv1->tv_sec == tv2->tv_sec && tv1->tv_usec > tv2->tv_usec) |
194 | if (tv1->tv_sec == tv2->tv_sec && tv1->tv_usec > tv2->tv_usec) |
195 | return 1; |
195 | return 1; |
196 | return 0; |
196 | return 0; |
197 | } |
197 | } |
198 | static int tv_gteq(struct timeval *tv1, struct timeval *tv2) |
198 | static int tv_gteq(struct timeval *tv1, struct timeval *tv2) |
199 | { |
199 | { |
200 | if (tv1->tv_sec > tv2->tv_sec) |
200 | if (tv1->tv_sec > tv2->tv_sec) |
201 | return 1; |
201 | return 1; |
202 | if (tv1->tv_sec == tv2->tv_sec && tv1->tv_usec >= tv2->tv_usec) |
202 | if (tv1->tv_sec == tv2->tv_sec && tv1->tv_usec >= tv2->tv_usec) |
203 | return 1; |
203 | return 1; |
204 | return 0; |
204 | return 0; |
205 | } |
205 | } |
206 | 206 | ||
207 | /* Hash table functions */ |
207 | /* Hash table functions */ |
208 | #define CONN_HASH_TABLE_CHAINS 32 |
208 | #define CONN_HASH_TABLE_CHAINS 32 |
209 | 209 | ||
210 | static hash_index_t conn_hash(unsigned long *key) |
210 | static hash_index_t conn_hash(unsigned long *key) |
211 | { |
211 | { |
212 | assert(key); |
212 | assert(key); |
213 | return ((*key) >> 4) % CONN_HASH_TABLE_CHAINS; |
213 | return ((*key) >> 4) % CONN_HASH_TABLE_CHAINS; |
214 | } |
214 | } |
215 | 215 | ||
216 | static int conn_compare(unsigned long key[], hash_count_t keys, link_t *item) |
216 | static int conn_compare(unsigned long key[], hash_count_t keys, link_t *item) |
217 | { |
217 | { |
218 | connection_t *hs; |
218 | connection_t *hs; |
219 | 219 | ||
220 | hs = hash_table_get_instance(item, connection_t, link); |
220 | hs = hash_table_get_instance(item, connection_t, link); |
221 | 221 | ||
222 | return key[0] == hs->in_phone_hash; |
222 | return key[0] == hs->in_phone_hash; |
223 | } |
223 | } |
224 | 224 | ||
225 | static void conn_remove(link_t *item) |
225 | static void conn_remove(link_t *item) |
226 | { |
226 | { |
227 | free(hash_table_get_instance(item, connection_t, link)); |
227 | free(hash_table_get_instance(item, connection_t, link)); |
228 | } |
228 | } |
229 | 229 | ||
230 | 230 | ||
231 | /** Operations for NS hash table. */ |
231 | /** Operations for NS hash table. */ |
232 | static hash_table_operations_t conn_hash_table_ops = { |
232 | static hash_table_operations_t conn_hash_table_ops = { |
233 | .hash = conn_hash, |
233 | .hash = conn_hash, |
234 | .compare = conn_compare, |
234 | .compare = conn_compare, |
235 | .remove_callback = conn_remove |
235 | .remove_callback = conn_remove |
236 | }; |
236 | }; |
237 | 237 | ||
238 | /** Insert sort timeout msg into timeouts list |
238 | /** Insert sort timeout msg into timeouts list |
239 | * |
239 | * |
240 | */ |
240 | */ |
241 | static void insert_timeout(awaiter_t *wd) |
241 | static void insert_timeout(awaiter_t *wd) |
242 | { |
242 | { |
243 | link_t *tmp; |
243 | link_t *tmp; |
244 | awaiter_t *cur; |
244 | awaiter_t *cur; |
245 | 245 | ||
246 | wd->timedout = 0; |
246 | wd->timedout = 0; |
247 | wd->inlist = 1; |
247 | wd->inlist = 1; |
248 | 248 | ||
249 | tmp = timeout_list.next; |
249 | tmp = timeout_list.next; |
250 | while (tmp != &timeout_list) { |
250 | while (tmp != &timeout_list) { |
251 | cur = list_get_instance(tmp, awaiter_t, link); |
251 | cur = list_get_instance(tmp, awaiter_t, link); |
252 | if (tv_gteq(&cur->expires, &wd->expires)) |
252 | if (tv_gteq(&cur->expires, &wd->expires)) |
253 | break; |
253 | break; |
254 | tmp = tmp->next; |
254 | tmp = tmp->next; |
255 | } |
255 | } |
256 | list_append(&wd->link, tmp); |
256 | list_append(&wd->link, tmp); |
257 | } |
257 | } |
258 | 258 | ||
259 | /*************************************************/ |
- | |
260 | - | ||
261 | /** Try to route a call to an appropriate connection thread |
259 | /** Try to route a call to an appropriate connection fibril |
262 | * |
260 | * |
263 | */ |
261 | */ |
264 | static int route_call(ipc_callid_t callid, ipc_call_t *call) |
262 | static int route_call(ipc_callid_t callid, ipc_call_t *call) |
265 | { |
263 | { |
266 | connection_t *conn; |
264 | connection_t *conn; |
267 | msg_t *msg; |
265 | msg_t *msg; |
268 | link_t *hlp; |
266 | link_t *hlp; |
269 | unsigned long key; |
267 | unsigned long key; |
270 | 268 | ||
271 | futex_down(&async_futex); |
269 | futex_down(&async_futex); |
272 | 270 | ||
273 | key = call->in_phone_hash; |
271 | key = call->in_phone_hash; |
274 | hlp = hash_table_find(&conn_hash_table, &key); |
272 | hlp = hash_table_find(&conn_hash_table, &key); |
275 | if (!hlp) { |
273 | if (!hlp) { |
276 | futex_up(&async_futex); |
274 | futex_up(&async_futex); |
277 | return 0; |
275 | return 0; |
278 | } |
276 | } |
279 | conn = hash_table_get_instance(hlp, connection_t, link); |
277 | conn = hash_table_get_instance(hlp, connection_t, link); |
280 | 278 | ||
281 | msg = malloc(sizeof(*msg)); |
279 | msg = malloc(sizeof(*msg)); |
282 | msg->callid = callid; |
280 | msg->callid = callid; |
283 | msg->call = *call; |
281 | msg->call = *call; |
284 | list_append(&msg->link, &conn->msg_queue); |
282 | list_append(&msg->link, &conn->msg_queue); |
285 | 283 | ||
286 | if (IPC_GET_METHOD(*call) == IPC_M_PHONE_HUNGUP) |
284 | if (IPC_GET_METHOD(*call) == IPC_M_PHONE_HUNGUP) |
287 | conn->close_callid = callid; |
285 | conn->close_callid = callid; |
288 | 286 | ||
289 | /* If the call is waiting for event, run it */ |
287 | /* If the call is waiting for event, run it */ |
290 | if (!conn->wdata.active) { |
288 | if (!conn->wdata.active) { |
291 | /* If in timeout list, remove it */ |
289 | /* If in timeout list, remove it */ |
292 | if (conn->wdata.inlist) { |
290 | if (conn->wdata.inlist) { |
293 | conn->wdata.inlist = 0; |
291 | conn->wdata.inlist = 0; |
294 | list_remove(&conn->wdata.link); |
292 | list_remove(&conn->wdata.link); |
295 | } |
293 | } |
296 | conn->wdata.active = 1; |
294 | conn->wdata.active = 1; |
297 | fibril_add_ready(conn->wdata.fid); |
295 | fibril_add_ready(conn->wdata.fid); |
298 | } |
296 | } |
299 | 297 | ||
300 | futex_up(&async_futex); |
298 | futex_up(&async_futex); |
301 | 299 | ||
302 | return 1; |
300 | return 1; |
303 | } |
301 | } |
304 | 302 | ||
305 | /** Return new incoming message for current(thread-local) connection */ |
303 | /** Return new incoming message for the current (fibril-local) connection */ |
306 | ipc_callid_t async_get_call_timeout(ipc_call_t *call, suseconds_t usecs) |
304 | ipc_callid_t async_get_call_timeout(ipc_call_t *call, suseconds_t usecs) |
307 | { |
305 | { |
308 | msg_t *msg; |
306 | msg_t *msg; |
309 | ipc_callid_t callid; |
307 | ipc_callid_t callid; |
310 | connection_t *conn; |
308 | connection_t *conn; |
311 | 309 | ||
312 | assert(FIBRIL_connection); |
310 | assert(FIBRIL_connection); |
313 | /* GCC 4.1.0 coughs on FIBRIL_connection-> dereference, |
311 | /* GCC 4.1.0 coughs on FIBRIL_connection-> dereference, |
314 | * GCC 4.1.1 happilly puts the rdhwr instruction in delay slot. |
312 | * GCC 4.1.1 happilly puts the rdhwr instruction in delay slot. |
315 | * I would never expect to find so many errors in |
313 | * I would never expect to find so many errors in |
316 | * compiler *($&$(*&$ |
314 | * compiler *($&$(*&$ |
317 | */ |
315 | */ |
318 | conn = FIBRIL_connection; |
316 | conn = FIBRIL_connection; |
319 | 317 | ||
320 | futex_down(&async_futex); |
318 | futex_down(&async_futex); |
321 | 319 | ||
322 | if (usecs) { |
320 | if (usecs) { |
323 | gettimeofday(&conn->wdata.expires, NULL); |
321 | gettimeofday(&conn->wdata.expires, NULL); |
324 | tv_add(&conn->wdata.expires, usecs); |
322 | tv_add(&conn->wdata.expires, usecs); |
325 | } else { |
323 | } else { |
326 | conn->wdata.inlist = 0; |
324 | conn->wdata.inlist = 0; |
327 | } |
325 | } |
328 | /* If nothing in queue, wait until something appears */ |
326 | /* If nothing in queue, wait until something appears */ |
329 | while (list_empty(&conn->msg_queue)) { |
327 | while (list_empty(&conn->msg_queue)) { |
330 | if (usecs) |
328 | if (usecs) |
331 | insert_timeout(&conn->wdata); |
329 | insert_timeout(&conn->wdata); |
332 | 330 | ||
333 | conn->wdata.active = 0; |
331 | conn->wdata.active = 0; |
334 | fibril_schedule_next_adv(FIBRIL_TO_MANAGER); |
332 | fibril_schedule_next_adv(FIBRIL_TO_MANAGER); |
335 | /* Futex is up after getting back from async_manager |
333 | /* Futex is up after getting back from async_manager |
336 | * get it again */ |
334 | * get it again */ |
337 | futex_down(&async_futex); |
335 | futex_down(&async_futex); |
338 | if (usecs && conn->wdata.timedout && |
336 | if (usecs && conn->wdata.timedout && |
339 | list_empty(&conn->msg_queue)) { |
337 | list_empty(&conn->msg_queue)) { |
340 | /* If we timed out-> exit */ |
338 | /* If we timed out-> exit */ |
341 | futex_up(&async_futex); |
339 | futex_up(&async_futex); |
342 | return 0; |
340 | return 0; |
343 | } |
341 | } |
344 | } |
342 | } |
345 | 343 | ||
346 | msg = list_get_instance(conn->msg_queue.next, msg_t, link); |
344 | msg = list_get_instance(conn->msg_queue.next, msg_t, link); |
347 | list_remove(&msg->link); |
345 | list_remove(&msg->link); |
348 | callid = msg->callid; |
346 | callid = msg->callid; |
349 | *call = msg->call; |
347 | *call = msg->call; |
350 | free(msg); |
348 | free(msg); |
351 | 349 | ||
352 | futex_up(&async_futex); |
350 | futex_up(&async_futex); |
353 | return callid; |
351 | return callid; |
354 | } |
352 | } |
355 | 353 | ||
356 | /** Thread function that gets created on new connection |
354 | /** Fibril function that gets created on new connection |
357 | * |
355 | * |
358 | * This function is defined as a weak symbol - to be redefined in |
356 | * This function is defined as a weak symbol - to be redefined in |
359 | * user code. |
357 | * user code. |
360 | */ |
358 | */ |
361 | static void default_client_connection(ipc_callid_t callid, ipc_call_t *call) |
359 | static void default_client_connection(ipc_callid_t callid, ipc_call_t *call) |
362 | { |
360 | { |
363 | ipc_answer_fast(callid, ENOENT, 0, 0); |
361 | ipc_answer_fast(callid, ENOENT, 0, 0); |
364 | } |
362 | } |
365 | static void default_interrupt_received(ipc_callid_t callid, ipc_call_t *call) |
363 | static void default_interrupt_received(ipc_callid_t callid, ipc_call_t *call) |
366 | { |
364 | { |
367 | } |
365 | } |
368 | 366 | ||
369 | /** Wrapper for client connection thread |
367 | /** Wrapper for client connection fibril. |
- | 368 | * |
|
- | 369 | * When new connection arrives, a fibril with this implementing function is |
|
- | 370 | * created. It calls client_connection() and does the final cleanup. |
|
370 | * |
371 | * |
371 | * When new connection arrives, thread with this function is created. |
- | |
372 | * It calls client_connection and does final cleanup. |
372 | * @param arg Connection structure pointer |
373 | * |
373 | * |
374 | * @param arg Connection structure pointer |
374 | * @return Always zero. |
375 | */ |
375 | */ |
376 | static int connection_fibril(void *arg) |
376 | static int connection_fibril(void *arg) |
377 | { |
377 | { |
378 | unsigned long key; |
378 | unsigned long key; |
379 | msg_t *msg; |
379 | msg_t *msg; |
380 | int close_answered = 0; |
380 | int close_answered = 0; |
381 | 381 | ||
382 | /* Setup thread local connection pointer */ |
382 | /* Setup fibril-local connection pointer */ |
383 | FIBRIL_connection = (connection_t *) arg; |
383 | FIBRIL_connection = (connection_t *) arg; |
384 | FIBRIL_connection->cfibril(FIBRIL_connection->callid, |
384 | FIBRIL_connection->cfibril(FIBRIL_connection->callid, |
385 | &FIBRIL_connection->call); |
385 | &FIBRIL_connection->call); |
386 | 386 | ||
387 | /* Remove myself from connection hash table */ |
387 | /* Remove myself from connection hash table */ |
388 | futex_down(&async_futex); |
388 | futex_down(&async_futex); |
389 | key = FIBRIL_connection->in_phone_hash; |
389 | key = FIBRIL_connection->in_phone_hash; |
390 | hash_table_remove(&conn_hash_table, &key, 1); |
390 | hash_table_remove(&conn_hash_table, &key, 1); |
391 | futex_up(&async_futex); |
391 | futex_up(&async_futex); |
392 | 392 | ||
393 | /* Answer all remaining messages with ehangup */ |
393 | /* Answer all remaining messages with ehangup */ |
394 | while (!list_empty(&FIBRIL_connection->msg_queue)) { |
394 | while (!list_empty(&FIBRIL_connection->msg_queue)) { |
395 | msg = list_get_instance(FIBRIL_connection->msg_queue.next, |
395 | msg = list_get_instance(FIBRIL_connection->msg_queue.next, |
396 | msg_t, link); |
396 | msg_t, link); |
397 | list_remove(&msg->link); |
397 | list_remove(&msg->link); |
398 | if (msg->callid == FIBRIL_connection->close_callid) |
398 | if (msg->callid == FIBRIL_connection->close_callid) |
399 | close_answered = 1; |
399 | close_answered = 1; |
400 | ipc_answer_fast(msg->callid, EHANGUP, 0, 0); |
400 | ipc_answer_fast(msg->callid, EHANGUP, 0, 0); |
401 | free(msg); |
401 | free(msg); |
402 | } |
402 | } |
403 | if (FIBRIL_connection->close_callid) |
403 | if (FIBRIL_connection->close_callid) |
404 | ipc_answer_fast(FIBRIL_connection->close_callid, 0, 0, 0); |
404 | ipc_answer_fast(FIBRIL_connection->close_callid, 0, 0, 0); |
405 | 405 | ||
406 | return 0; |
406 | return 0; |
407 | } |
407 | } |
408 | 408 | ||
409 | /** Create new thread for a new connection |
409 | /** Create a new fibril for a new connection. |
410 | * |
410 | * |
411 | * Creates new thread for connection, fills in connection |
411 | * Creates new fibril for connection, fills in connection structures and inserts |
412 | * structures and inserts it into the hash table, so that |
- | |
413 | * later we can easily do routing of messages to particular |
412 | * it into the hash table, so that later we can easily do routing of messages to |
414 | * threads. |
413 | * particular fibrils. |
415 | * |
414 | * |
416 | * @param in_phone_hash Identification of the incoming connection |
415 | * @param in_phone_hash Identification of the incoming connection |
417 | * @param callid Callid of the IPC_M_CONNECT_ME_TO packet |
416 | * @param callid Callid of the IPC_M_CONNECT_ME_TO packet |
418 | * @param call Call data of the opening packet |
417 | * @param call Call data of the opening packet |
419 | * @param cfibril Fibril function that should be called upon |
418 | * @param cfibril Fibril function that should be called upon |
420 | * opening the connection |
419 | * opening the connection |
421 | * @return New fibril id. |
420 | * @return New fibril id. |
422 | */ |
421 | */ |
423 | fid_t async_new_connection(ipcarg_t in_phone_hash, ipc_callid_t callid, |
422 | fid_t async_new_connection(ipcarg_t in_phone_hash, ipc_callid_t callid, |
424 | ipc_call_t *call, void (*cfibril)(ipc_callid_t, ipc_call_t *)) |
423 | ipc_call_t *call, void (*cfibril)(ipc_callid_t, ipc_call_t *)) |
425 | { |
424 | { |
426 | connection_t *conn; |
425 | connection_t *conn; |
427 | unsigned long key; |
426 | unsigned long key; |
428 | 427 | ||
429 | conn = malloc(sizeof(*conn)); |
428 | conn = malloc(sizeof(*conn)); |
430 | if (!conn) { |
429 | if (!conn) { |
431 | ipc_answer_fast(callid, ENOMEM, 0, 0); |
430 | ipc_answer_fast(callid, ENOMEM, 0, 0); |
432 | return NULL; |
431 | return NULL; |
433 | } |
432 | } |
434 | conn->in_phone_hash = in_phone_hash; |
433 | conn->in_phone_hash = in_phone_hash; |
435 | list_initialize(&conn->msg_queue); |
434 | list_initialize(&conn->msg_queue); |
436 | conn->callid = callid; |
435 | conn->callid = callid; |
437 | conn->close_callid = 0; |
436 | conn->close_callid = 0; |
438 | if (call) |
437 | if (call) |
439 | conn->call = *call; |
438 | conn->call = *call; |
440 | conn->wdata.active = 1; /* We will activate it asap */ |
439 | conn->wdata.active = 1; /* We will activate it asap */ |
441 | conn->cfibril = cfibril; |
440 | conn->cfibril = cfibril; |
442 | 441 | ||
443 | conn->wdata.fid = fibril_create(connection_fibril, conn); |
442 | conn->wdata.fid = fibril_create(connection_fibril, conn); |
444 | if (!conn->wdata.fid) { |
443 | if (!conn->wdata.fid) { |
445 | free(conn); |
444 | free(conn); |
446 | ipc_answer_fast(callid, ENOMEM, 0, 0); |
445 | ipc_answer_fast(callid, ENOMEM, 0, 0); |
447 | return NULL; |
446 | return NULL; |
448 | } |
447 | } |
449 | /* Add connection to hash table */ |
448 | /* Add connection to hash table */ |
450 | key = conn->in_phone_hash; |
449 | key = conn->in_phone_hash; |
451 | futex_down(&async_futex); |
450 | futex_down(&async_futex); |
452 | hash_table_insert(&conn_hash_table, &key, &conn->link); |
451 | hash_table_insert(&conn_hash_table, &key, &conn->link); |
453 | futex_up(&async_futex); |
452 | futex_up(&async_futex); |
454 | 453 | ||
455 | fibril_add_ready(conn->wdata.fid); |
454 | fibril_add_ready(conn->wdata.fid); |
456 | 455 | ||
457 | return conn->wdata.fid; |
456 | return conn->wdata.fid; |
458 | } |
457 | } |
459 | 458 | ||
460 | /** Handle call that was received */ |
459 | /** Handle a call that was received. */ |
461 | static void handle_call(ipc_callid_t callid, ipc_call_t *call) |
460 | static void handle_call(ipc_callid_t callid, ipc_call_t *call) |
462 | { |
461 | { |
463 | /* Unrouted call - do some default behaviour */ |
462 | /* Unrouted call - do some default behaviour */ |
464 | if ((callid & IPC_CALLID_NOTIFICATION)) { |
463 | if ((callid & IPC_CALLID_NOTIFICATION)) { |
465 | in_interrupt_handler = 1; |
464 | in_interrupt_handler = 1; |
466 | (*interrupt_received)(callid,call); |
465 | (*interrupt_received)(callid,call); |
467 | in_interrupt_handler = 0; |
466 | in_interrupt_handler = 0; |
468 | return; |
467 | return; |
469 | } |
468 | } |
470 | 469 | ||
471 | switch (IPC_GET_METHOD(*call)) { |
470 | switch (IPC_GET_METHOD(*call)) { |
472 | case IPC_M_CONNECT_ME_TO: |
471 | case IPC_M_CONNECT_ME_TO: |
473 | /* Open new connection with thread etc. */ |
472 | /* Open new connection with fibril etc. */ |
474 | async_new_connection(IPC_GET_ARG3(*call), callid, call, |
473 | async_new_connection(IPC_GET_ARG3(*call), callid, call, |
475 | client_connection); |
474 | client_connection); |
476 | return; |
475 | return; |
477 | } |
476 | } |
478 | 477 | ||
479 | /* Try to route call through connection tables */ |
478 | /* Try to route call through connection tables */ |
480 | if (route_call(callid, call)) |
479 | if (route_call(callid, call)) |
481 | return; |
480 | return; |
482 | 481 | ||
483 | /* Unknown call from unknown phone - hang it up */ |
482 | /* Unknown call from unknown phone - hang it up */ |
484 | ipc_answer_fast(callid, EHANGUP, 0, 0); |
483 | ipc_answer_fast(callid, EHANGUP, 0, 0); |
485 | } |
484 | } |
486 | 485 | ||
487 | /** Fire all timeouts that expired |
486 | /** Fire all timeouts that expired. */ |
488 | * |
- | |
489 | */ |
- | |
490 | static void handle_expired_timeouts(void) |
487 | static void handle_expired_timeouts(void) |
491 | { |
488 | { |
492 | struct timeval tv; |
489 | struct timeval tv; |
493 | awaiter_t *waiter; |
490 | awaiter_t *waiter; |
494 | link_t *cur; |
491 | link_t *cur; |
495 | 492 | ||
496 | gettimeofday(&tv,NULL); |
493 | gettimeofday(&tv,NULL); |
497 | futex_down(&async_futex); |
494 | futex_down(&async_futex); |
498 | 495 | ||
499 | cur = timeout_list.next; |
496 | cur = timeout_list.next; |
500 | while (cur != &timeout_list) { |
497 | while (cur != &timeout_list) { |
501 | waiter = list_get_instance(cur, awaiter_t, link); |
498 | waiter = list_get_instance(cur, awaiter_t, link); |
502 | if (tv_gt(&waiter->expires, &tv)) |
499 | if (tv_gt(&waiter->expires, &tv)) |
503 | break; |
500 | break; |
504 | cur = cur->next; |
501 | cur = cur->next; |
505 | list_remove(&waiter->link); |
502 | list_remove(&waiter->link); |
506 | waiter->inlist = 0; |
503 | waiter->inlist = 0; |
507 | waiter->timedout = 1; |
504 | waiter->timedout = 1; |
508 | /* Redundant condition? The thread should not |
505 | /* Redundant condition? The fibril should not |
509 | * be active when it gets here. |
506 | * be active when it gets here. |
510 | */ |
507 | */ |
511 | if (!waiter->active) { |
508 | if (!waiter->active) { |
512 | waiter->active = 1; |
509 | waiter->active = 1; |
513 | fibril_add_ready(waiter->fid); |
510 | fibril_add_ready(waiter->fid); |
514 | } |
511 | } |
515 | } |
512 | } |
516 | 513 | ||
517 | futex_up(&async_futex); |
514 | futex_up(&async_futex); |
518 | } |
515 | } |
519 | 516 | ||
520 | /** Endless loop dispatching incoming calls and answers */ |
517 | /** Endless loop dispatching incoming calls and answers */ |
521 | static int async_manager_worker(void) |
518 | static int async_manager_worker(void) |
522 | { |
519 | { |
523 | ipc_call_t call; |
520 | ipc_call_t call; |
524 | ipc_callid_t callid; |
521 | ipc_callid_t callid; |
525 | int timeout; |
522 | int timeout; |
526 | awaiter_t *waiter; |
523 | awaiter_t *waiter; |
527 | struct timeval tv; |
524 | struct timeval tv; |
528 | 525 | ||
529 | while (1) { |
526 | while (1) { |
530 | if (fibril_schedule_next_adv(FIBRIL_FROM_MANAGER)) { |
527 | if (fibril_schedule_next_adv(FIBRIL_FROM_MANAGER)) { |
531 | futex_up(&async_futex); |
528 | futex_up(&async_futex); |
532 | /* async_futex is always held |
529 | /* async_futex is always held |
533 | * when entering manager thread |
530 | * when entering manager fibril |
534 | */ |
531 | */ |
535 | continue; |
532 | continue; |
536 | } |
533 | } |
537 | futex_down(&async_futex); |
534 | futex_down(&async_futex); |
538 | if (!list_empty(&timeout_list)) { |
535 | if (!list_empty(&timeout_list)) { |
539 | waiter = list_get_instance(timeout_list.next, awaiter_t, |
536 | waiter = list_get_instance(timeout_list.next, awaiter_t, |
540 | link); |
537 | link); |
541 | gettimeofday(&tv, NULL); |
538 | gettimeofday(&tv, NULL); |
542 | if (tv_gteq(&tv, &waiter->expires)) { |
539 | if (tv_gteq(&tv, &waiter->expires)) { |
543 | futex_up(&async_futex); |
540 | futex_up(&async_futex); |
544 | handle_expired_timeouts(); |
541 | handle_expired_timeouts(); |
545 | continue; |
542 | continue; |
546 | } else |
543 | } else |
547 | timeout = tv_sub(&waiter->expires, &tv); |
544 | timeout = tv_sub(&waiter->expires, &tv); |
548 | } else |
545 | } else |
549 | timeout = SYNCH_NO_TIMEOUT; |
546 | timeout = SYNCH_NO_TIMEOUT; |
550 | futex_up(&async_futex); |
547 | futex_up(&async_futex); |
551 | 548 | ||
552 | callid = ipc_wait_cycle(&call, timeout, SYNCH_FLAGS_NONE); |
549 | callid = ipc_wait_cycle(&call, timeout, SYNCH_FLAGS_NONE); |
553 | 550 | ||
554 | if (!callid) { |
551 | if (!callid) { |
555 | handle_expired_timeouts(); |
552 | handle_expired_timeouts(); |
556 | continue; |
553 | continue; |
557 | } |
554 | } |
558 | 555 | ||
559 | if (callid & IPC_CALLID_ANSWERED) { |
556 | if (callid & IPC_CALLID_ANSWERED) { |
560 | continue; |
557 | continue; |
561 | } |
558 | } |
562 | 559 | ||
563 | handle_call(callid, &call); |
560 | handle_call(callid, &call); |
564 | } |
561 | } |
565 | 562 | ||
566 | return 0; |
563 | return 0; |
567 | } |
564 | } |
568 | 565 | ||
569 | /** Function to start async_manager as a standalone thread |
566 | /** Function to start async_manager as a standalone fibril. |
570 | * |
567 | * |
571 | * When more kernel threads are used, one async manager should |
568 | * When more kernel threads are used, one async manager should |
572 | * exist per thread. The particular implementation may change, |
- | |
573 | * currently one async_manager is started automatically per kernel |
- | |
574 | * thread except the main thread. |
569 | * exist per thread. |
575 | */ |
570 | */ |
576 | static int async_manager_fibril(void *arg) |
571 | static int async_manager_fibril(void *arg) |
577 | { |
572 | { |
578 | futex_up(&async_futex); |
573 | futex_up(&async_futex); |
579 | /* async_futex is always locked when entering |
574 | /* async_futex is always locked when entering |
580 | * manager */ |
575 | * manager */ |
581 | async_manager_worker(); |
576 | async_manager_worker(); |
582 | 577 | ||
583 | return 0; |
578 | return 0; |
584 | } |
579 | } |
585 | 580 | ||
586 | /** Add one manager to manager list */ |
581 | /** Add one manager to manager list */ |
587 | void async_create_manager(void) |
582 | void async_create_manager(void) |
588 | { |
583 | { |
589 | fid_t fid; |
584 | fid_t fid; |
590 | 585 | ||
591 | fid = fibril_create(async_manager_fibril, NULL); |
586 | fid = fibril_create(async_manager_fibril, NULL); |
592 | fibril_add_manager(fid); |
587 | fibril_add_manager(fid); |
593 | } |
588 | } |
594 | 589 | ||
595 | /** Remove one manager from manager list */ |
590 | /** Remove one manager from manager list */ |
596 | void async_destroy_manager(void) |
591 | void async_destroy_manager(void) |
597 | { |
592 | { |
598 | fibril_remove_manager(); |
593 | fibril_remove_manager(); |
599 | } |
594 | } |
600 | 595 | ||
601 | /** Initialize internal structures needed for async manager */ |
596 | /** Initialize internal structures needed for async manager */ |
602 | int _async_init(void) |
597 | int _async_init(void) |
603 | { |
598 | { |
604 | if (!hash_table_create(&conn_hash_table, CONN_HASH_TABLE_CHAINS, 1, |
599 | if (!hash_table_create(&conn_hash_table, CONN_HASH_TABLE_CHAINS, 1, |
605 | &conn_hash_table_ops)) { |
600 | &conn_hash_table_ops)) { |
606 | printf("%s: cannot create hash table\n", "async"); |
601 | printf("%s: cannot create hash table\n", "async"); |
607 | return ENOMEM; |
602 | return ENOMEM; |
608 | } |
603 | } |
609 | 604 | ||
610 | return 0; |
605 | return 0; |
611 | } |
606 | } |
612 | 607 | ||
613 | /** IPC handler for messages in async framework |
608 | /** IPC handler for messages in async framework |
614 | * |
609 | * |
615 | * Notify the fibril which is waiting for this message, that it arrived |
610 | * Notify the fibril which is waiting for this message, that it arrived |
616 | */ |
611 | */ |
617 | static void reply_received(void *private, int retval, |
612 | static void reply_received(void *private, int retval, ipc_call_t *data) |
618 | ipc_call_t *data) |
- | |
619 | { |
613 | { |
620 | amsg_t *msg = (amsg_t *) private; |
614 | amsg_t *msg = (amsg_t *) private; |
621 | 615 | ||
622 | msg->retval = retval; |
616 | msg->retval = retval; |
623 | 617 | ||
624 | futex_down(&async_futex); |
618 | futex_down(&async_futex); |
625 | /* Copy data after futex_down, just in case the |
619 | /* Copy data after futex_down, just in case the |
626 | * call was detached |
620 | * call was detached |
627 | */ |
621 | */ |
628 | if (msg->dataptr) |
622 | if (msg->dataptr) |
629 | *msg->dataptr = *data; |
623 | *msg->dataptr = *data; |
630 | 624 | ||
631 | write_barrier(); |
625 | write_barrier(); |
632 | /* Remove message from timeout list */ |
626 | /* Remove message from timeout list */ |
633 | if (msg->wdata.inlist) |
627 | if (msg->wdata.inlist) |
634 | list_remove(&msg->wdata.link); |
628 | list_remove(&msg->wdata.link); |
635 | msg->done = 1; |
629 | msg->done = 1; |
636 | if (! msg->wdata.active) { |
630 | if (! msg->wdata.active) { |
637 | msg->wdata.active = 1; |
631 | msg->wdata.active = 1; |
638 | fibril_add_ready(msg->wdata.fid); |
632 | fibril_add_ready(msg->wdata.fid); |
639 | } |
633 | } |
640 | futex_up(&async_futex); |
634 | futex_up(&async_futex); |
641 | } |
635 | } |
642 | 636 | ||
643 | /** Send message and return id of the sent message |
637 | /** Send message and return id of the sent message |
644 | * |
638 | * |
645 | * The return value can be used as input for async_wait() to wait |
639 | * The return value can be used as input for async_wait() to wait |
646 | * for completion. |
640 | * for completion. |
647 | */ |
641 | */ |
648 | aid_t async_send_2(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2, |
642 | aid_t async_send_2(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2, |
649 | ipc_call_t *dataptr) |
643 | ipc_call_t *dataptr) |
650 | { |
644 | { |
651 | amsg_t *msg; |
645 | amsg_t *msg; |
652 | 646 | ||
653 | if (in_interrupt_handler) { |
647 | if (in_interrupt_handler) { |
654 | printf("Cannot send asynchronous request in interrupt " |
648 | printf("Cannot send asynchronous request in interrupt " |
655 | "handler.\n"); |
649 | "handler.\n"); |
656 | _exit(1); |
650 | _exit(1); |
657 | } |
651 | } |
658 | 652 | ||
659 | msg = malloc(sizeof(*msg)); |
653 | msg = malloc(sizeof(*msg)); |
660 | msg->done = 0; |
654 | msg->done = 0; |
661 | msg->dataptr = dataptr; |
655 | msg->dataptr = dataptr; |
662 | 656 | ||
663 | msg->wdata.active = 1; /* We may sleep in next method, but it |
657 | msg->wdata.active = 1; /* We may sleep in next method, but it |
664 | * will use it's own mechanism */ |
658 | * will use it's own mechanism */ |
665 | ipc_call_async_2(phoneid, method, arg1, arg2, msg, reply_received, 1); |
659 | ipc_call_async_2(phoneid, method, arg1, arg2, msg, reply_received, 1); |
666 | 660 | ||
667 | return (aid_t) msg; |
661 | return (aid_t) msg; |
668 | } |
662 | } |
669 | 663 | ||
670 | /** Send message and return id of the sent message |
664 | /** Send message and return id of the sent message |
671 | * |
665 | * |
672 | * The return value can be used as input for async_wait() to wait |
666 | * The return value can be used as input for async_wait() to wait |
673 | * for completion. |
667 | * for completion. |
674 | */ |
668 | */ |
675 | aid_t async_send_3(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2, |
669 | aid_t async_send_3(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2, |
676 | ipcarg_t arg3, ipc_call_t *dataptr) |
670 | ipcarg_t arg3, ipc_call_t *dataptr) |
677 | { |
671 | { |
678 | amsg_t *msg; |
672 | amsg_t *msg; |
679 | 673 | ||
680 | if (in_interrupt_handler) { |
674 | if (in_interrupt_handler) { |
681 | printf("Cannot send asynchronous request in interrupt handler.\n"); |
675 | printf("Cannot send asynchronous request in interrupt handler.\n"); |
682 | _exit(1); |
676 | _exit(1); |
683 | } |
677 | } |
684 | 678 | ||
685 | msg = malloc(sizeof(*msg)); |
679 | msg = malloc(sizeof(*msg)); |
686 | msg->done = 0; |
680 | msg->done = 0; |
687 | msg->dataptr = dataptr; |
681 | msg->dataptr = dataptr; |
688 | 682 | ||
689 | msg->wdata.active = 1; /* We may sleep in next method, but it |
683 | msg->wdata.active = 1; /* We may sleep in next method, but it |
690 | * will use it's own mechanism */ |
684 | * will use it's own mechanism */ |
691 | ipc_call_async_3(phoneid, method, arg1, arg2, arg3, msg, reply_received, |
685 | ipc_call_async_3(phoneid, method, arg1, arg2, arg3, msg, reply_received, |
692 | 1); |
686 | 1); |
693 | 687 | ||
694 | return (aid_t) msg; |
688 | return (aid_t) msg; |
695 | } |
689 | } |
696 | 690 | ||
697 | /** Wait for a message sent by async framework |
691 | /** Wait for a message sent by async framework |
698 | * |
692 | * |
699 | * @param amsgid Message ID to wait for |
693 | * @param amsgid Message ID to wait for |
700 | * @param retval Pointer to variable where will be stored retval |
694 | * @param retval Pointer to variable where will be stored retval of the |
701 | * of the answered message. If NULL, it is ignored. |
695 | * answered message. If NULL, it is ignored. |
702 | * |
- | |
703 | */ |
696 | */ |
704 | void async_wait_for(aid_t amsgid, ipcarg_t *retval) |
697 | void async_wait_for(aid_t amsgid, ipcarg_t *retval) |
705 | { |
698 | { |
706 | amsg_t *msg = (amsg_t *) amsgid; |
699 | amsg_t *msg = (amsg_t *) amsgid; |
707 | 700 | ||
708 | futex_down(&async_futex); |
701 | futex_down(&async_futex); |
709 | if (msg->done) { |
702 | if (msg->done) { |
710 | futex_up(&async_futex); |
703 | futex_up(&async_futex); |
711 | goto done; |
704 | goto done; |
712 | } |
705 | } |
713 | 706 | ||
714 | msg->wdata.fid = fibril_get_id(); |
707 | msg->wdata.fid = fibril_get_id(); |
715 | msg->wdata.active = 0; |
708 | msg->wdata.active = 0; |
716 | msg->wdata.inlist = 0; |
709 | msg->wdata.inlist = 0; |
717 | /* Leave locked async_futex when entering this function */ |
710 | /* Leave locked async_futex when entering this function */ |
718 | fibril_schedule_next_adv(FIBRIL_TO_MANAGER); |
711 | fibril_schedule_next_adv(FIBRIL_TO_MANAGER); |
719 | /* futex is up automatically after fibril_schedule_next...*/ |
712 | /* futex is up automatically after fibril_schedule_next...*/ |
720 | done: |
713 | done: |
721 | if (retval) |
714 | if (retval) |
722 | *retval = msg->retval; |
715 | *retval = msg->retval; |
723 | free(msg); |
716 | free(msg); |
724 | } |
717 | } |
725 | 718 | ||
726 | /** Wait for a message sent by async framework with timeout |
719 | /** Wait for a message sent by async framework with timeout |
727 | * |
720 | * |
728 | * @param amsgid Message ID to wait for |
721 | * @param amsgid Message ID to wait for |
729 | * @param retval Pointer to variable where will be stored retval |
722 | * @param retval Pointer to variable where will be stored retval |
730 | * of the answered message. If NULL, it is ignored. |
723 | * of the answered message. If NULL, it is ignored. |
731 | * @param timeout Timeout in usecs |
724 | * @param timeout Timeout in usecs |
732 | * @return 0 on success, ETIMEOUT if timeout expired |
725 | * @return 0 on success, ETIMEOUT if timeout expired |
733 | * |
726 | * |
734 | */ |
727 | */ |
735 | int async_wait_timeout(aid_t amsgid, ipcarg_t *retval, suseconds_t timeout) |
728 | int async_wait_timeout(aid_t amsgid, ipcarg_t *retval, suseconds_t timeout) |
736 | { |
729 | { |
737 | amsg_t *msg = (amsg_t *) amsgid; |
730 | amsg_t *msg = (amsg_t *) amsgid; |
738 | 731 | ||
739 | /* TODO: Let it go through the event read at least once */ |
732 | /* TODO: Let it go through the event read at least once */ |
740 | if (timeout < 0) |
733 | if (timeout < 0) |
741 | return ETIMEOUT; |
734 | return ETIMEOUT; |
742 | 735 | ||
743 | futex_down(&async_futex); |
736 | futex_down(&async_futex); |
744 | if (msg->done) { |
737 | if (msg->done) { |
745 | futex_up(&async_futex); |
738 | futex_up(&async_futex); |
746 | goto done; |
739 | goto done; |
747 | } |
740 | } |
748 | 741 | ||
749 | gettimeofday(&msg->wdata.expires, NULL); |
742 | gettimeofday(&msg->wdata.expires, NULL); |
750 | tv_add(&msg->wdata.expires, timeout); |
743 | tv_add(&msg->wdata.expires, timeout); |
751 | 744 | ||
752 | msg->wdata.fid = fibril_get_id(); |
745 | msg->wdata.fid = fibril_get_id(); |
753 | msg->wdata.active = 0; |
746 | msg->wdata.active = 0; |
754 | insert_timeout(&msg->wdata); |
747 | insert_timeout(&msg->wdata); |
755 | 748 | ||
756 | /* Leave locked async_futex when entering this function */ |
749 | /* Leave locked async_futex when entering this function */ |
757 | fibril_schedule_next_adv(FIBRIL_TO_MANAGER); |
750 | fibril_schedule_next_adv(FIBRIL_TO_MANAGER); |
758 | /* futex is up automatically after fibril_schedule_next...*/ |
751 | /* futex is up automatically after fibril_schedule_next...*/ |
759 | 752 | ||
760 | if (!msg->done) |
753 | if (!msg->done) |
761 | return ETIMEOUT; |
754 | return ETIMEOUT; |
762 | 755 | ||
763 | done: |
756 | done: |
764 | if (retval) |
757 | if (retval) |
765 | *retval = msg->retval; |
758 | *retval = msg->retval; |
766 | free(msg); |
759 | free(msg); |
767 | 760 | ||
768 | return 0; |
761 | return 0; |
769 | } |
762 | } |
770 | 763 | ||
771 | /** Wait specified time, but in the meantime handle incoming events |
764 | /** Wait specified time, but in the meantime handle incoming events |
772 | * |
765 | * |
773 | * @param timeout Time in microseconds to wait |
766 | * @param timeout Time in microseconds to wait |
774 | */ |
767 | */ |
775 | void async_usleep(suseconds_t timeout) |
768 | void async_usleep(suseconds_t timeout) |
776 | { |
769 | { |
777 | amsg_t *msg; |
770 | amsg_t *msg; |
778 | 771 | ||
779 | if (in_interrupt_handler) { |
772 | if (in_interrupt_handler) { |
780 | printf("Cannot call async_usleep in interrupt handler.\n"); |
773 | printf("Cannot call async_usleep in interrupt handler.\n"); |
781 | _exit(1); |
774 | _exit(1); |
782 | } |
775 | } |
783 | 776 | ||
784 | msg = malloc(sizeof(*msg)); |
777 | msg = malloc(sizeof(*msg)); |
785 | if (!msg) |
778 | if (!msg) |
786 | return; |
779 | return; |
787 | 780 | ||
788 | msg->wdata.fid = fibril_get_id(); |
781 | msg->wdata.fid = fibril_get_id(); |
789 | msg->wdata.active = 0; |
782 | msg->wdata.active = 0; |
790 | 783 | ||
791 | gettimeofday(&msg->wdata.expires, NULL); |
784 | gettimeofday(&msg->wdata.expires, NULL); |
792 | tv_add(&msg->wdata.expires, timeout); |
785 | tv_add(&msg->wdata.expires, timeout); |
793 | 786 | ||
794 | futex_down(&async_futex); |
787 | futex_down(&async_futex); |
795 | insert_timeout(&msg->wdata); |
788 | insert_timeout(&msg->wdata); |
796 | /* Leave locked async_futex when entering this function */ |
789 | /* Leave locked the async_futex when entering this function */ |
797 | fibril_schedule_next_adv(FIBRIL_TO_MANAGER); |
790 | fibril_schedule_next_adv(FIBRIL_TO_MANAGER); |
798 | /* futex is up automatically after fibril_schedule_next...*/ |
791 | /* futex is up automatically after fibril_schedule_next_adv()...*/ |
799 | free(msg); |
792 | free(msg); |
800 | } |
793 | } |
801 | 794 | ||
802 | /** Set function that is called, IPC_M_CONNECT_ME_TO is received |
795 | /** Set function that is called when IPC_M_CONNECT_ME_TO is received. |
803 | * |
796 | * |
804 | * @param conn Function that will form new psthread. |
797 | * @param conn Function that will form a new fibril. |
805 | */ |
798 | */ |
806 | void async_set_client_connection(async_client_conn_t conn) |
799 | void async_set_client_connection(async_client_conn_t conn) |
807 | { |
800 | { |
808 | client_connection = conn; |
801 | client_connection = conn; |
809 | } |
802 | } |
810 | void async_set_interrupt_received(async_client_conn_t conn) |
803 | void async_set_interrupt_received(async_client_conn_t conn) |
811 | { |
804 | { |
812 | interrupt_received = conn; |
805 | interrupt_received = conn; |
813 | } |
806 | } |
814 | 807 | ||
815 | /* Primitive functions for simple communication */ |
808 | /* Primitive functions for simple communication */ |
816 | void async_msg_3(int phoneid, ipcarg_t method, ipcarg_t arg1, |
809 | void async_msg_3(int phoneid, ipcarg_t method, ipcarg_t arg1, |
817 | ipcarg_t arg2, ipcarg_t arg3) |
810 | ipcarg_t arg2, ipcarg_t arg3) |
818 | { |
811 | { |
819 | ipc_call_async_3(phoneid, method, arg1, arg2, arg3, NULL, NULL, |
812 | ipc_call_async_3(phoneid, method, arg1, arg2, arg3, NULL, NULL, |
820 | !in_interrupt_handler); |
813 | !in_interrupt_handler); |
821 | } |
814 | } |
822 | 815 | ||
823 | void async_msg_2(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2) |
816 | void async_msg_2(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2) |
824 | { |
817 | { |
825 | ipc_call_async_2(phoneid, method, arg1, arg2, NULL, NULL, |
818 | ipc_call_async_2(phoneid, method, arg1, arg2, NULL, NULL, |
826 | !in_interrupt_handler); |
819 | !in_interrupt_handler); |
827 | } |
820 | } |
828 | 821 | ||
829 | /** @} |
822 | /** @} |
830 | */ |
823 | */ |
831 | 824 |