[49a796f1] | 1 | /*
|
---|
| 2 | * Copyright (c) 2006 Ondrej Palkovsky
|
---|
| 3 | * All rights reserved.
|
---|
| 4 | *
|
---|
| 5 | * Redistribution and use in source and binary forms, with or without
|
---|
| 6 | * modification, are permitted provided that the following conditions
|
---|
| 7 | * are met:
|
---|
| 8 | *
|
---|
| 9 | * - Redistributions of source code must retain the above copyright
|
---|
| 10 | * notice, this list of conditions and the following disclaimer.
|
---|
| 11 | * - Redistributions in binary form must reproduce the above copyright
|
---|
| 12 | * notice, this list of conditions and the following disclaimer in the
|
---|
| 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
|
---|
| 15 | * derived from this software without specific prior written permission.
|
---|
| 16 | *
|
---|
| 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
|
---|
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
---|
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
---|
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
---|
| 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
|
---|
| 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
|
---|
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
---|
| 27 | */
|
---|
| 28 |
|
---|
| 29 | #define LIBC_ASYNC_C_
|
---|
| 30 | #include <ipc/ipc.h>
|
---|
| 31 | #include <async.h>
|
---|
| 32 | #include "../private/async.h"
|
---|
| 33 | #undef LIBC_ASYNC_C_
|
---|
| 34 |
|
---|
| 35 | #include <ipc/irq.h>
|
---|
| 36 | #include <ipc/event.h>
|
---|
| 37 | #include <futex.h>
|
---|
| 38 | #include <fibril.h>
|
---|
| 39 | #include <adt/hash_table.h>
|
---|
| 40 | #include <adt/hash.h>
|
---|
| 41 | #include <adt/list.h>
|
---|
| 42 | #include <assert.h>
|
---|
| 43 | #include <errno.h>
|
---|
| 44 | #include <sys/time.h>
|
---|
| 45 | #include <libarch/barrier.h>
|
---|
| 46 | #include <stdbool.h>
|
---|
| 47 | #include <stdlib.h>
|
---|
| 48 | #include <mem.h>
|
---|
| 49 | #include <stdlib.h>
|
---|
| 50 | #include <macros.h>
|
---|
| 51 | #include <as.h>
|
---|
| 52 | #include <abi/mm/as.h>
|
---|
| 53 | #include "../private/libc.h"
|
---|
| 54 |
|
---|
| 55 | /** Interface data */
|
---|
| 56 | typedef struct {
|
---|
| 57 | ht_link_t link;
|
---|
| 58 |
|
---|
| 59 | /** Interface ID */
|
---|
| 60 | iface_t iface;
|
---|
| 61 |
|
---|
| 62 | /** Interface ports */
|
---|
| 63 | hash_table_t port_hash_table;
|
---|
| 64 |
|
---|
| 65 | /** Next available port ID */
|
---|
| 66 | port_id_t port_id_avail;
|
---|
| 67 | } interface_t;
|
---|
| 68 |
|
---|
| 69 | /* Port data */
|
---|
| 70 | typedef struct {
|
---|
| 71 | ht_link_t link;
|
---|
| 72 |
|
---|
| 73 | /** Port ID */
|
---|
| 74 | port_id_t id;
|
---|
| 75 |
|
---|
| 76 | /** Port connection handler */
|
---|
| 77 | async_port_handler_t handler;
|
---|
| 78 |
|
---|
| 79 | /** Client data */
|
---|
| 80 | void *data;
|
---|
| 81 | } port_t;
|
---|
| 82 |
|
---|
| 83 | /** Default fallback fibril function.
|
---|
| 84 | *
|
---|
| 85 | * This fallback fibril function gets called on incomming connections that do
|
---|
| 86 | * not have a specific handler defined.
|
---|
| 87 | *
|
---|
| 88 | * @param chandle Handle of the incoming call.
|
---|
| 89 | * @param call Data of the incoming call.
|
---|
| 90 | * @param arg Local argument
|
---|
| 91 | *
|
---|
| 92 | */
|
---|
| 93 | static void default_fallback_port_handler(cap_call_handle_t chandle,
|
---|
| 94 | ipc_call_t *call, void *arg)
|
---|
| 95 | {
|
---|
| 96 | ipc_answer_0(chandle, ENOENT);
|
---|
| 97 | }
|
---|
| 98 |
|
---|
| 99 | static async_port_handler_t fallback_port_handler =
|
---|
| 100 | default_fallback_port_handler;
|
---|
| 101 | static void *fallback_port_data = NULL;
|
---|
| 102 |
|
---|
[5c76cc61] | 103 | /** Futex guarding the interface hash table. */
|
---|
| 104 | static futex_t interface_futex = FUTEX_INITIALIZER;
|
---|
[49a796f1] | 105 | static hash_table_t interface_hash_table;
|
---|
| 106 |
|
---|
| 107 | static size_t interface_key_hash(void *key)
|
---|
| 108 | {
|
---|
| 109 | iface_t iface = *(iface_t *) key;
|
---|
| 110 | return iface;
|
---|
| 111 | }
|
---|
| 112 |
|
---|
| 113 | static size_t interface_hash(const ht_link_t *item)
|
---|
| 114 | {
|
---|
| 115 | interface_t *interface = hash_table_get_inst(item, interface_t, link);
|
---|
| 116 | return interface_key_hash(&interface->iface);
|
---|
| 117 | }
|
---|
| 118 |
|
---|
| 119 | static bool interface_key_equal(void *key, const ht_link_t *item)
|
---|
| 120 | {
|
---|
| 121 | iface_t iface = *(iface_t *) key;
|
---|
| 122 | interface_t *interface = hash_table_get_inst(item, interface_t, link);
|
---|
| 123 | return iface == interface->iface;
|
---|
| 124 | }
|
---|
| 125 |
|
---|
| 126 | /** Operations for the port hash table. */
|
---|
| 127 | static hash_table_ops_t interface_hash_table_ops = {
|
---|
| 128 | .hash = interface_hash,
|
---|
| 129 | .key_hash = interface_key_hash,
|
---|
| 130 | .key_equal = interface_key_equal,
|
---|
| 131 | .equal = NULL,
|
---|
| 132 | .remove_callback = NULL
|
---|
| 133 | };
|
---|
| 134 |
|
---|
| 135 | static size_t port_key_hash(void *key)
|
---|
| 136 | {
|
---|
| 137 | port_id_t port_id = *(port_id_t *) key;
|
---|
| 138 | return port_id;
|
---|
| 139 | }
|
---|
| 140 |
|
---|
| 141 | static size_t port_hash(const ht_link_t *item)
|
---|
| 142 | {
|
---|
| 143 | port_t *port = hash_table_get_inst(item, port_t, link);
|
---|
| 144 | return port_key_hash(&port->id);
|
---|
| 145 | }
|
---|
| 146 |
|
---|
| 147 | static bool port_key_equal(void *key, const ht_link_t *item)
|
---|
| 148 | {
|
---|
| 149 | port_id_t port_id = *(port_id_t *) key;
|
---|
| 150 | port_t *port = hash_table_get_inst(item, port_t, link);
|
---|
| 151 | return port_id == port->id;
|
---|
| 152 | }
|
---|
| 153 |
|
---|
| 154 | /** Operations for the port hash table. */
|
---|
| 155 | static hash_table_ops_t port_hash_table_ops = {
|
---|
| 156 | .hash = port_hash,
|
---|
| 157 | .key_hash = port_key_hash,
|
---|
| 158 | .key_equal = port_key_equal,
|
---|
| 159 | .equal = NULL,
|
---|
| 160 | .remove_callback = NULL
|
---|
| 161 | };
|
---|
| 162 |
|
---|
| 163 | static interface_t *async_new_interface(iface_t iface)
|
---|
| 164 | {
|
---|
| 165 | interface_t *interface =
|
---|
| 166 | (interface_t *) malloc(sizeof(interface_t));
|
---|
| 167 | if (!interface)
|
---|
| 168 | return NULL;
|
---|
| 169 |
|
---|
| 170 | bool ret = hash_table_create(&interface->port_hash_table, 0, 0,
|
---|
| 171 | &port_hash_table_ops);
|
---|
| 172 | if (!ret) {
|
---|
| 173 | free(interface);
|
---|
| 174 | return NULL;
|
---|
| 175 | }
|
---|
| 176 |
|
---|
| 177 | interface->iface = iface;
|
---|
| 178 | interface->port_id_avail = 0;
|
---|
| 179 |
|
---|
| 180 | hash_table_insert(&interface_hash_table, &interface->link);
|
---|
| 181 |
|
---|
| 182 | return interface;
|
---|
| 183 | }
|
---|
| 184 |
|
---|
| 185 | static port_t *async_new_port(interface_t *interface,
|
---|
| 186 | async_port_handler_t handler, void *data)
|
---|
| 187 | {
|
---|
[5c76cc61] | 188 | // TODO: Move the malloc out of critical section.
|
---|
[49a796f1] | 189 | port_t *port = (port_t *) malloc(sizeof(port_t));
|
---|
| 190 | if (!port)
|
---|
| 191 | return NULL;
|
---|
| 192 |
|
---|
| 193 | port_id_t id = interface->port_id_avail;
|
---|
| 194 | interface->port_id_avail++;
|
---|
| 195 |
|
---|
| 196 | port->id = id;
|
---|
| 197 | port->handler = handler;
|
---|
| 198 | port->data = data;
|
---|
| 199 |
|
---|
| 200 | hash_table_insert(&interface->port_hash_table, &port->link);
|
---|
| 201 |
|
---|
| 202 | return port;
|
---|
| 203 | }
|
---|
| 204 |
|
---|
| 205 | errno_t async_create_port_internal(iface_t iface, async_port_handler_t handler,
|
---|
| 206 | void *data, port_id_t *port_id)
|
---|
| 207 | {
|
---|
| 208 | interface_t *interface;
|
---|
| 209 |
|
---|
[5c76cc61] | 210 | futex_lock(&interface_futex);
|
---|
[49a796f1] | 211 |
|
---|
| 212 | ht_link_t *link = hash_table_find(&interface_hash_table, &iface);
|
---|
| 213 | if (link)
|
---|
| 214 | interface = hash_table_get_inst(link, interface_t, link);
|
---|
| 215 | else
|
---|
| 216 | interface = async_new_interface(iface);
|
---|
| 217 |
|
---|
| 218 | if (!interface) {
|
---|
[5c76cc61] | 219 | futex_unlock(&interface_futex);
|
---|
[49a796f1] | 220 | return ENOMEM;
|
---|
| 221 | }
|
---|
| 222 |
|
---|
| 223 | port_t *port = async_new_port(interface, handler, data);
|
---|
| 224 | if (!port) {
|
---|
[5c76cc61] | 225 | futex_unlock(&interface_futex);
|
---|
[49a796f1] | 226 | return ENOMEM;
|
---|
| 227 | }
|
---|
| 228 |
|
---|
| 229 | *port_id = port->id;
|
---|
| 230 |
|
---|
[5c76cc61] | 231 | futex_unlock(&interface_futex);
|
---|
[49a796f1] | 232 |
|
---|
| 233 | return EOK;
|
---|
| 234 | }
|
---|
| 235 |
|
---|
| 236 | errno_t async_create_port(iface_t iface, async_port_handler_t handler,
|
---|
| 237 | void *data, port_id_t *port_id)
|
---|
| 238 | {
|
---|
| 239 | if ((iface & IFACE_MOD_MASK) == IFACE_MOD_CALLBACK)
|
---|
| 240 | return EINVAL;
|
---|
| 241 |
|
---|
| 242 | return async_create_port_internal(iface, handler, data, port_id);
|
---|
| 243 | }
|
---|
| 244 |
|
---|
| 245 | void async_set_fallback_port_handler(async_port_handler_t handler, void *data)
|
---|
| 246 | {
|
---|
| 247 | assert(handler != NULL);
|
---|
| 248 |
|
---|
| 249 | fallback_port_handler = handler;
|
---|
| 250 | fallback_port_data = data;
|
---|
| 251 | }
|
---|
| 252 |
|
---|
| 253 | static port_t *async_find_port(iface_t iface, port_id_t port_id)
|
---|
| 254 | {
|
---|
| 255 | port_t *port = NULL;
|
---|
| 256 |
|
---|
[5c76cc61] | 257 | futex_lock(&interface_futex);
|
---|
[49a796f1] | 258 |
|
---|
| 259 | ht_link_t *link = hash_table_find(&interface_hash_table, &iface);
|
---|
| 260 | if (link) {
|
---|
| 261 | interface_t *interface =
|
---|
| 262 | hash_table_get_inst(link, interface_t, link);
|
---|
| 263 |
|
---|
| 264 | link = hash_table_find(&interface->port_hash_table, &port_id);
|
---|
| 265 | if (link)
|
---|
| 266 | port = hash_table_get_inst(link, port_t, link);
|
---|
| 267 | }
|
---|
| 268 |
|
---|
[5c76cc61] | 269 | futex_unlock(&interface_futex);
|
---|
[49a796f1] | 270 |
|
---|
| 271 | return port;
|
---|
| 272 | }
|
---|
| 273 |
|
---|
| 274 | async_port_handler_t async_get_port_handler(iface_t iface, port_id_t port_id,
|
---|
| 275 | void **data)
|
---|
| 276 | {
|
---|
| 277 | assert(data);
|
---|
| 278 |
|
---|
| 279 | async_port_handler_t handler = fallback_port_handler;
|
---|
| 280 | *data = fallback_port_data;
|
---|
| 281 |
|
---|
| 282 | port_t *port = async_find_port(iface, port_id);
|
---|
| 283 | if (port) {
|
---|
| 284 | handler = port->handler;
|
---|
| 285 | *data = port->data;
|
---|
| 286 | }
|
---|
| 287 |
|
---|
| 288 | return handler;
|
---|
| 289 | }
|
---|
| 290 |
|
---|
| 291 | /** Initialize the async framework.
|
---|
| 292 | *
|
---|
| 293 | */
|
---|
| 294 | void __async_ports_init(void)
|
---|
| 295 | {
|
---|
| 296 | if (!hash_table_create(&interface_hash_table, 0, 0,
|
---|
| 297 | &interface_hash_table_ops))
|
---|
| 298 | abort();
|
---|
| 299 | }
|
---|