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954 | palkovsky | 1 | /* |
2071 | jermar | 2 | * Copyright (c) 2006 Ondrej Palkovsky |
954 | palkovsky | 3 | * All rights reserved. |
4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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1653 | cejka | 27 | */ |
28 | |||
29 | /** @addtogroup libc |
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30 | * @{ |
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31 | * @} |
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32 | */ |
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33 | |||
1866 | jermar | 34 | /** @addtogroup libcipc IPC |
1653 | cejka | 35 | * @brief HelenOS uspace IPC |
36 | * @{ |
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37 | * @ingroup libc |
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38 | */ |
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39 | /** @file |
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954 | palkovsky | 40 | */ |
41 | |||
1352 | palkovsky | 42 | #include <ipc/ipc.h> |
954 | palkovsky | 43 | #include <libc.h> |
999 | palkovsky | 44 | #include <malloc.h> |
45 | #include <errno.h> |
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1352 | palkovsky | 46 | #include <libadt/list.h> |
999 | palkovsky | 47 | #include <stdio.h> |
48 | #include <unistd.h> |
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1350 | palkovsky | 49 | #include <futex.h> |
1365 | jermar | 50 | #include <kernel/synch/synch.h> |
1463 | palkovsky | 51 | #include <async.h> |
2482 | jermar | 52 | #include <fibril.h> |
2522 | jermar | 53 | #include <assert.h> |
954 | palkovsky | 54 | |
2490 | jermar | 55 | /** |
56 | * Structures of this type are used for keeping track of sent asynchronous calls |
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57 | * and queing unsent calls. |
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999 | palkovsky | 58 | */ |
59 | typedef struct { |
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60 | link_t list; |
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61 | |||
62 | ipc_async_callback_t callback; |
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63 | void *private; |
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64 | union { |
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65 | ipc_callid_t callid; |
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66 | struct { |
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1091 | palkovsky | 67 | ipc_call_t data; |
999 | palkovsky | 68 | int phoneid; |
69 | } msg; |
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2471 | jermar | 70 | } u; |
2482 | jermar | 71 | fid_t fid; /**< Fibril waiting for sending this call. */ |
999 | palkovsky | 72 | } async_call_t; |
73 | |||
74 | LIST_INITIALIZE(dispatched_calls); |
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75 | |||
2471 | jermar | 76 | /** List of asynchronous calls that were not accepted by kernel. |
77 | * |
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78 | * It is protected by async_futex, because if the call cannot be sent into the |
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79 | * kernel, the async framework is used automatically. |
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1463 | palkovsky | 80 | */ |
2471 | jermar | 81 | LIST_INITIALIZE(queued_calls); |
1463 | palkovsky | 82 | |
1392 | palkovsky | 83 | static atomic_t ipc_futex = FUTEX_INITIALIZER; |
1350 | palkovsky | 84 | |
2471 | jermar | 85 | /** Make a fast synchronous call. |
86 | * |
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87 | * Only one payload argument can be passed using this function. However, this |
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88 | * function is faster than the generic ipc_call_sync_3(). |
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89 | * |
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90 | * @param phoneid Phone handle for the call. |
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91 | * @param method Requested method. |
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92 | * @param arg1 Service-defined payload argument. |
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93 | * @param result If non-NULL, the return ARG1 will be stored there. |
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94 | * |
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95 | * @return Negative values represent errors returned by IPC. |
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96 | * Otherwise the RETVAL of the answer is returned. |
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97 | */ |
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98 | int ipc_call_sync(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t *result) |
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954 | palkovsky | 99 | { |
1091 | palkovsky | 100 | ipc_call_t resdata; |
966 | palkovsky | 101 | int callres; |
102 | |||
999 | palkovsky | 103 | callres = __SYSCALL4(SYS_IPC_CALL_SYNC_FAST, phoneid, method, arg1, |
2471 | jermar | 104 | (sysarg_t) &resdata); |
966 | palkovsky | 105 | if (callres) |
106 | return callres; |
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107 | if (result) |
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108 | *result = IPC_GET_ARG1(resdata); |
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109 | return IPC_GET_RETVAL(resdata); |
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954 | palkovsky | 110 | } |
111 | |||
2471 | jermar | 112 | /** Make a synchronous call transmitting 3 arguments of payload. |
113 | * |
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114 | * @param phoneid Phone handle for the call. |
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115 | * @param method Requested method. |
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116 | * @param arg1 Service-defined payload argument. |
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117 | * @param arg2 Service-defined payload argument. |
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118 | * @param arg3 Service-defined payload argument. |
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119 | * @param result1 If non-NULL, storage for the first return argument. |
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120 | * @param result2 If non-NULL, storage for the second return argument. |
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121 | * @param result3 If non-NULL, storage for the third return argument. |
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122 | * |
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123 | * @return Negative value means IPC error. |
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124 | * Otherwise the RETVAL of the answer. |
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125 | */ |
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126 | int ipc_call_sync_3(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2, |
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127 | ipcarg_t arg3, ipcarg_t *result1, ipcarg_t *result2, ipcarg_t *result3) |
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954 | palkovsky | 128 | { |
1091 | palkovsky | 129 | ipc_call_t data; |
966 | palkovsky | 130 | int callres; |
131 | |||
132 | IPC_SET_METHOD(data, method); |
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133 | IPC_SET_ARG1(data, arg1); |
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134 | IPC_SET_ARG2(data, arg2); |
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135 | IPC_SET_ARG3(data, arg3); |
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136 | |||
2471 | jermar | 137 | callres = __SYSCALL3(SYS_IPC_CALL_SYNC, phoneid, (sysarg_t) &data, |
138 | (sysarg_t) &data); |
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966 | palkovsky | 139 | if (callres) |
140 | return callres; |
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141 | |||
142 | if (result1) |
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143 | *result1 = IPC_GET_ARG1(data); |
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144 | if (result2) |
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145 | *result2 = IPC_GET_ARG2(data); |
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146 | if (result3) |
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147 | *result3 = IPC_GET_ARG3(data); |
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148 | return IPC_GET_RETVAL(data); |
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149 | } |
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150 | |||
2471 | jermar | 151 | /** Syscall to send asynchronous message. |
152 | * |
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153 | * @param phoneid Phone handle for the call. |
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154 | * @param data Call data with the request. |
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155 | * |
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156 | * @return Hash of the call or an error code. |
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157 | */ |
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158 | static ipc_callid_t _ipc_call_async(int phoneid, ipc_call_t *data) |
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999 | palkovsky | 159 | { |
2471 | jermar | 160 | return __SYSCALL2(SYS_IPC_CALL_ASYNC, phoneid, (sysarg_t) data); |
999 | palkovsky | 161 | } |
162 | |||
2471 | jermar | 163 | /** Prolog to ipc_call_async_*() functions. |
164 | * |
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165 | * @param private Argument for the answer/error callback. |
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166 | * @param callback Answer/error callback. |
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167 | * |
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168 | * @return New, partially initialized async_call structure or NULL. |
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169 | */ |
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170 | static inline async_call_t *ipc_prepare_async(void *private, |
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171 | ipc_async_callback_t callback) |
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966 | palkovsky | 172 | { |
999 | palkovsky | 173 | async_call_t *call; |
966 | palkovsky | 174 | |
999 | palkovsky | 175 | call = malloc(sizeof(*call)); |
176 | if (!call) { |
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1443 | palkovsky | 177 | if (callback) |
178 | callback(private, ENOMEM, NULL); |
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1489 | palkovsky | 179 | return NULL; |
999 | palkovsky | 180 | } |
1463 | palkovsky | 181 | call->callback = callback; |
182 | call->private = private; |
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183 | |||
1489 | palkovsky | 184 | return call; |
185 | } |
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186 | |||
2471 | jermar | 187 | /** Epilogue of ipc_call_async_*() functions. |
188 | * |
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189 | * @param callid Value returned by the SYS_IPC_CALL_ASYNC_* syscall. |
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190 | * @param phoneid Phone handle through which the call was made. |
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191 | * @param call async_call structure returned by ipc_prepare_async(). |
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2530 | jermar | 192 | * @param can_preempt If non-zero, the current fibril can be preempted in this |
193 | * call. |
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2471 | jermar | 194 | */ |
195 | static inline void ipc_finish_async(ipc_callid_t callid, int phoneid, |
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196 | async_call_t *call, int can_preempt) |
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1489 | palkovsky | 197 | { |
1751 | palkovsky | 198 | if (!call) { /* Nothing to do regardless if failed or not */ |
199 | futex_up(&ipc_futex); |
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200 | return; |
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201 | } |
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202 | |||
966 | palkovsky | 203 | if (callid == IPC_CALLRET_FATAL) { |
1463 | palkovsky | 204 | futex_up(&ipc_futex); |
966 | palkovsky | 205 | /* Call asynchronous handler with error code */ |
1489 | palkovsky | 206 | if (call->callback) |
207 | call->callback(call->private, ENOENT, NULL); |
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999 | palkovsky | 208 | free(call); |
966 | palkovsky | 209 | return; |
210 | } |
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999 | palkovsky | 211 | |
1463 | palkovsky | 212 | if (callid == IPC_CALLRET_TEMPORARY) { |
213 | futex_up(&ipc_futex); |
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999 | palkovsky | 214 | |
215 | call->u.msg.phoneid = phoneid; |
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1518 | palkovsky | 216 | |
1463 | palkovsky | 217 | futex_down(&async_futex); |
999 | palkovsky | 218 | list_append(&call->list, &queued_calls); |
1463 | palkovsky | 219 | |
1518 | palkovsky | 220 | if (can_preempt) { |
2482 | jermar | 221 | call->fid = fibril_get_id(); |
222 | fibril_schedule_next_adv(FIBRIL_TO_MANAGER); |
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1518 | palkovsky | 223 | /* Async futex unlocked by previous call */ |
224 | } else { |
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2482 | jermar | 225 | call->fid = 0; |
1518 | palkovsky | 226 | futex_up(&async_futex); |
227 | } |
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966 | palkovsky | 228 | return; |
229 | } |
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999 | palkovsky | 230 | call->u.callid = callid; |
2471 | jermar | 231 | /* Add call to the list of dispatched calls */ |
999 | palkovsky | 232 | list_append(&call->list, &dispatched_calls); |
1350 | palkovsky | 233 | futex_up(&ipc_futex); |
1489 | palkovsky | 234 | |
954 | palkovsky | 235 | } |
236 | |||
2471 | jermar | 237 | /** Make a fast asynchronous call. |
1489 | palkovsky | 238 | * |
2471 | jermar | 239 | * This function can only handle two arguments of payload. It is, however, |
240 | * faster than the more generic ipc_call_async_3(). |
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241 | * |
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242 | * Note that this function is a void function. |
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243 | * During normal opertation, answering this call will trigger the callback. |
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244 | * In case of fatal error, call the callback handler with the proper error code. |
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245 | * If the call cannot be temporarily made, queue it. |
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246 | * |
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247 | * @param phoneid Phone handle for the call. |
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248 | * @param method Requested method. |
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249 | * @param arg1 Service-defined payload argument. |
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250 | * @param arg2 Service-defined payload argument. |
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251 | * @param private Argument to be passed to the answer/error callback. |
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252 | * @param callback Answer or error callback. |
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2530 | jermar | 253 | * @param can_preempt If non-zero, the current fibril will be preempted in |
254 | * case the kernel temporarily refuses to accept more |
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2471 | jermar | 255 | * asynchronous calls. |
1489 | palkovsky | 256 | */ |
257 | void ipc_call_async_2(int phoneid, ipcarg_t method, ipcarg_t arg1, |
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2471 | jermar | 258 | ipcarg_t arg2, void *private, ipc_async_callback_t callback, |
259 | int can_preempt) |
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1489 | palkovsky | 260 | { |
1751 | palkovsky | 261 | async_call_t *call = NULL; |
1489 | palkovsky | 262 | ipc_callid_t callid; |
966 | palkovsky | 263 | |
1751 | palkovsky | 264 | if (callback) { |
265 | call = ipc_prepare_async(private, callback); |
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266 | if (!call) |
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267 | return; |
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268 | } |
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1489 | palkovsky | 269 | |
2471 | jermar | 270 | /* |
271 | * We need to make sure that we get callid before another thread |
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272 | * accesses the queue again. |
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273 | */ |
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1489 | palkovsky | 274 | futex_down(&ipc_futex); |
2471 | jermar | 275 | callid = __SYSCALL4(SYS_IPC_CALL_ASYNC_FAST, phoneid, method, arg1, |
276 | arg2); |
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1489 | palkovsky | 277 | |
278 | if (callid == IPC_CALLRET_TEMPORARY) { |
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1751 | palkovsky | 279 | if (!call) { |
280 | call = ipc_prepare_async(private, callback); |
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281 | if (!call) |
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282 | return; |
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283 | } |
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1489 | palkovsky | 284 | IPC_SET_METHOD(call->u.msg.data, method); |
285 | IPC_SET_ARG1(call->u.msg.data, arg1); |
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286 | IPC_SET_ARG2(call->u.msg.data, arg2); |
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287 | } |
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1518 | palkovsky | 288 | ipc_finish_async(callid, phoneid, call, can_preempt); |
1489 | palkovsky | 289 | } |
290 | |||
2471 | jermar | 291 | /** Make an asynchronous call transmitting the entire payload. |
1489 | palkovsky | 292 | * |
2471 | jermar | 293 | * Note that this function is a void function. |
294 | * During normal opertation, answering this call will trigger the callback. |
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295 | * In case of fatal error, call the callback handler with the proper error code. |
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296 | * If the call cannot be temporarily made, queue it. |
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297 | * |
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298 | * @param phoneid Phone handle for the call. |
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299 | * @param method Requested method. |
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300 | * @param arg1 Service-defined payload argument. |
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301 | * @param arg2 Service-defined payload argument. |
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302 | * @param arg3 Service-defined payload argument. |
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303 | * @param private Argument to be passed to the answer/error callback. |
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304 | * @param callback Answer or error callback. |
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2530 | jermar | 305 | * @param can_preempt If non-zero, the current fibril will be preempted in |
306 | * case the kernel temporarily refuses to accept more |
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2471 | jermar | 307 | * asynchronous calls. |
308 | * |
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1489 | palkovsky | 309 | */ |
310 | void ipc_call_async_3(int phoneid, ipcarg_t method, ipcarg_t arg1, |
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2471 | jermar | 311 | ipcarg_t arg2, ipcarg_t arg3, void *private, ipc_async_callback_t callback, |
312 | int can_preempt) |
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1489 | palkovsky | 313 | { |
314 | async_call_t *call; |
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315 | ipc_callid_t callid; |
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316 | |||
317 | call = ipc_prepare_async(private, callback); |
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318 | if (!call) |
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319 | return; |
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320 | |||
321 | IPC_SET_METHOD(call->u.msg.data, method); |
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322 | IPC_SET_ARG1(call->u.msg.data, arg1); |
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323 | IPC_SET_ARG2(call->u.msg.data, arg2); |
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324 | IPC_SET_ARG3(call->u.msg.data, arg3); |
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2471 | jermar | 325 | /* |
326 | * We need to make sure that we get callid before another thread accesses |
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327 | * the queue again. |
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328 | */ |
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1489 | palkovsky | 329 | futex_down(&ipc_futex); |
330 | callid = _ipc_call_async(phoneid, &call->u.msg.data); |
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331 | |||
1518 | palkovsky | 332 | ipc_finish_async(callid, phoneid, call, can_preempt); |
1489 | palkovsky | 333 | } |
334 | |||
335 | |||
2471 | jermar | 336 | /** Answer a received call - fast version. |
1343 | jermar | 337 | * |
2471 | jermar | 338 | * The fast answer makes use of passing retval and first two arguments in |
339 | * registers. If you need to return more, use the ipc_answer() instead. |
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1343 | jermar | 340 | * |
2471 | jermar | 341 | * @param callid Hash of the call being answered. |
342 | * @param retval Return value. |
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343 | * @param arg1 First return argument. |
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344 | * @param arg2 Second return argument. |
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1343 | jermar | 345 | * |
2471 | jermar | 346 | * @return Zero on success or a value from @ref errno.h on failure. |
1343 | jermar | 347 | */ |
348 | ipcarg_t ipc_answer_fast(ipc_callid_t callid, ipcarg_t retval, ipcarg_t arg1, |
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2471 | jermar | 349 | ipcarg_t arg2) |
954 | palkovsky | 350 | { |
1330 | palkovsky | 351 | return __SYSCALL4(SYS_IPC_ANSWER_FAST, callid, retval, arg1, arg2); |
954 | palkovsky | 352 | } |
353 | |||
2471 | jermar | 354 | /** Answer a received call - full version. |
1343 | jermar | 355 | * |
2471 | jermar | 356 | * @param callid Hash of the call being answered. |
357 | * @param call Call structure with the answer. |
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358 | * Must be already initialized by the responder. |
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1343 | jermar | 359 | * |
2471 | jermar | 360 | * @return Zero on success or a value from @ref errno.h on failure. |
1343 | jermar | 361 | */ |
362 | ipcarg_t ipc_answer(ipc_callid_t callid, ipc_call_t *call) |
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363 | { |
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364 | return __SYSCALL2(SYS_IPC_ANSWER, callid, (sysarg_t) call); |
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365 | } |
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366 | |||
367 | |||
2471 | jermar | 368 | /** Try to dispatch queued calls from the async queue. */ |
999 | palkovsky | 369 | static void try_dispatch_queued_calls(void) |
370 | { |
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371 | async_call_t *call; |
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372 | ipc_callid_t callid; |
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373 | |||
2471 | jermar | 374 | /** @todo |
375 | * Integrate intelligently ipc_futex, so that it is locked during |
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376 | * ipc_call_async_*(), until it is added to dispatched_calls. |
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1463 | palkovsky | 377 | */ |
378 | futex_down(&async_futex); |
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999 | palkovsky | 379 | while (!list_empty(&queued_calls)) { |
2471 | jermar | 380 | call = list_get_instance(queued_calls.next, async_call_t, list); |
381 | callid = _ipc_call_async(call->u.msg.phoneid, &call->u.msg.data); |
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1463 | palkovsky | 382 | if (callid == IPC_CALLRET_TEMPORARY) { |
999 | palkovsky | 383 | break; |
1463 | palkovsky | 384 | } |
999 | palkovsky | 385 | list_remove(&call->list); |
1350 | palkovsky | 386 | |
1463 | palkovsky | 387 | futex_up(&async_futex); |
2482 | jermar | 388 | if (call->fid) |
389 | fibril_add_ready(call->fid); |
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1463 | palkovsky | 390 | |
999 | palkovsky | 391 | if (callid == IPC_CALLRET_FATAL) { |
1443 | palkovsky | 392 | if (call->callback) |
393 | call->callback(call->private, ENOENT, NULL); |
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999 | palkovsky | 394 | free(call); |
395 | } else { |
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396 | call->u.callid = callid; |
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1463 | palkovsky | 397 | futex_down(&ipc_futex); |
999 | palkovsky | 398 | list_append(&call->list, &dispatched_calls); |
1463 | palkovsky | 399 | futex_up(&ipc_futex); |
999 | palkovsky | 400 | } |
1463 | palkovsky | 401 | futex_down(&async_futex); |
999 | palkovsky | 402 | } |
1463 | palkovsky | 403 | futex_up(&async_futex); |
999 | palkovsky | 404 | } |
405 | |||
2471 | jermar | 406 | /** Handle a received answer. |
999 | palkovsky | 407 | * |
2471 | jermar | 408 | * Find the hash of the answer and call the answer callback. |
999 | palkovsky | 409 | * |
2471 | jermar | 410 | * @todo Make it use hash table. |
411 | * |
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412 | * @param callid Hash of the received answer. |
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413 | * The answer has the same hash as the request OR'ed with |
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414 | * the IPC_CALLID_ANSWERED bit. |
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415 | * @param data Call data of the answer. |
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999 | palkovsky | 416 | */ |
1091 | palkovsky | 417 | static void handle_answer(ipc_callid_t callid, ipc_call_t *data) |
999 | palkovsky | 418 | { |
419 | link_t *item; |
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420 | async_call_t *call; |
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421 | |||
422 | callid &= ~IPC_CALLID_ANSWERED; |
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423 | |||
1350 | palkovsky | 424 | futex_down(&ipc_futex); |
999 | palkovsky | 425 | for (item = dispatched_calls.next; item != &dispatched_calls; |
2471 | jermar | 426 | item = item->next) { |
999 | palkovsky | 427 | call = list_get_instance(item, async_call_t, list); |
428 | if (call->u.callid == callid) { |
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429 | list_remove(&call->list); |
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1350 | palkovsky | 430 | futex_up(&ipc_futex); |
1443 | palkovsky | 431 | if (call->callback) |
432 | call->callback(call->private, |
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2471 | jermar | 433 | IPC_GET_RETVAL(*data), data); |
1443 | palkovsky | 434 | free(call); |
999 | palkovsky | 435 | return; |
436 | } |
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437 | } |
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1350 | palkovsky | 438 | futex_up(&ipc_futex); |
999 | palkovsky | 439 | } |
440 | |||
441 | |||
2471 | jermar | 442 | /** Wait for a first call to come. |
954 | palkovsky | 443 | * |
2471 | jermar | 444 | * @param call Storage where the incoming call data will be stored. |
445 | * @param usec Timeout in microseconds |
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446 | * @param flags Flags passed to SYS_IPC_WAIT (blocking, nonblocking). |
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447 | * |
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448 | * @return Hash of the call. Note that certain bits have special |
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449 | * meaning. IPC_CALLID_ANSWERED will be set in an answer |
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450 | * and IPC_CALLID_NOTIFICATION is used for notifications. |
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451 | * |
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954 | palkovsky | 452 | */ |
1392 | palkovsky | 453 | ipc_callid_t ipc_wait_cycle(ipc_call_t *call, uint32_t usec, int flags) |
954 | palkovsky | 454 | { |
455 | ipc_callid_t callid; |
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456 | |||
1392 | palkovsky | 457 | callid = __SYSCALL3(SYS_IPC_WAIT, (sysarg_t) call, usec, flags); |
458 | /* Handle received answers */ |
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1463 | palkovsky | 459 | if (callid & IPC_CALLID_ANSWERED) { |
1392 | palkovsky | 460 | handle_answer(callid, call); |
1463 | palkovsky | 461 | try_dispatch_queued_calls(); |
462 | } |
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999 | palkovsky | 463 | |
954 | palkovsky | 464 | return callid; |
465 | } |
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1028 | palkovsky | 466 | |
1365 | jermar | 467 | /** Wait some time for an IPC call. |
468 | * |
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2471 | jermar | 469 | * The call will return after an answer is received. |
1709 | jermar | 470 | * |
2471 | jermar | 471 | * @param call Storage where the incoming call data will be stored. |
472 | * @param usec Timeout in microseconds. |
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473 | * |
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474 | * @return Hash of the answer. |
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1365 | jermar | 475 | */ |
476 | ipc_callid_t ipc_wait_for_call_timeout(ipc_call_t *call, uint32_t usec) |
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477 | { |
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478 | ipc_callid_t callid; |
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479 | |||
480 | do { |
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1503 | jermar | 481 | callid = ipc_wait_cycle(call, usec, SYNCH_FLAGS_NONE); |
1365 | jermar | 482 | } while (callid & IPC_CALLID_ANSWERED); |
483 | |||
484 | return callid; |
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485 | } |
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486 | |||
487 | /** Check if there is an IPC call waiting to be picked up. |
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488 | * |
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2471 | jermar | 489 | * @param call Storage where the incoming call will be stored. |
490 | * @return Hash of the answer. |
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1365 | jermar | 491 | */ |
492 | ipc_callid_t ipc_trywait_for_call(ipc_call_t *call) |
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493 | { |
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494 | ipc_callid_t callid; |
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495 | |||
496 | do { |
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2471 | jermar | 497 | callid = ipc_wait_cycle(call, SYNCH_NO_TIMEOUT, |
498 | SYNCH_FLAGS_NON_BLOCKING); |
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1365 | jermar | 499 | } while (callid & IPC_CALLID_ANSWERED); |
500 | |||
501 | return callid; |
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502 | } |
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503 | |||
2359 | jermar | 504 | /** Ask destination to do a callback connection. |
1091 | palkovsky | 505 | * |
2471 | jermar | 506 | * @param phoneid Phone handle used for contacting the other side. |
507 | * @param arg1 Service-defined argument. |
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508 | * @param arg2 Service-defined argument. |
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509 | * @param phonehash Storage where the library will store an opaque |
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2359 | jermar | 510 | * identifier of the phone that will be used for incoming |
2471 | jermar | 511 | * calls. This identifier can be used for connection |
512 | * tracking. |
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513 | * |
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514 | * @return Zero on success or a negative error code. |
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1091 | palkovsky | 515 | */ |
2359 | jermar | 516 | int ipc_connect_to_me(int phoneid, int arg1, int arg2, ipcarg_t *phonehash) |
1028 | palkovsky | 517 | { |
2359 | jermar | 518 | return ipc_call_sync_3(phoneid, IPC_M_CONNECT_TO_ME, arg1, arg2, 0, 0, 0, |
519 | phonehash); |
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1028 | palkovsky | 520 | } |
1061 | palkovsky | 521 | |
2359 | jermar | 522 | /** Ask through phone for a new connection to some service. |
1091 | palkovsky | 523 | * |
2471 | jermar | 524 | * @param phoneid Phone handle used for contacting the other side. |
2359 | jermar | 525 | * @param arg1 User defined argument. |
526 | * @param arg2 User defined argument. |
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527 | * |
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2471 | jermar | 528 | * @return New phone handle on success or a negative error code. |
1091 | palkovsky | 529 | */ |
1061 | palkovsky | 530 | int ipc_connect_me_to(int phoneid, int arg1, int arg2) |
531 | { |
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1092 | palkovsky | 532 | ipcarg_t newphid; |
1091 | palkovsky | 533 | int res; |
534 | |||
2359 | jermar | 535 | res = ipc_call_sync_3(phoneid, IPC_M_CONNECT_ME_TO, arg1, arg2, 0, 0, 0, |
536 | &newphid); |
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1091 | palkovsky | 537 | if (res) |
538 | return res; |
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539 | return newphid; |
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1061 | palkovsky | 540 | } |
541 | |||
2471 | jermar | 542 | /** Hang up a phone. |
543 | * |
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544 | * @param phoneid Handle of the phone to be hung up. |
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545 | * |
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546 | * @return Zero on success or a negative error code. |
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547 | */ |
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1089 | palkovsky | 548 | int ipc_hangup(int phoneid) |
549 | { |
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550 | return __SYSCALL1(SYS_IPC_HANGUP, phoneid); |
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551 | } |
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1259 | palkovsky | 552 | |
1923 | jermar | 553 | /** Register IRQ notification. |
554 | * |
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2471 | jermar | 555 | * @param inr IRQ number. |
556 | * @param devno Device number of the device generating inr. |
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557 | * @param method Use this method for notifying me. |
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558 | * @param ucode Top-half pseudocode handler. |
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1923 | jermar | 559 | * |
2471 | jermar | 560 | * @return Value returned by the kernel. |
1923 | jermar | 561 | */ |
562 | int ipc_register_irq(int inr, int devno, int method, irq_code_t *ucode) |
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1259 | palkovsky | 563 | { |
2471 | jermar | 564 | return __SYSCALL4(SYS_IPC_REGISTER_IRQ, inr, devno, method, |
565 | (sysarg_t) ucode); |
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1259 | palkovsky | 566 | } |
567 | |||
1923 | jermar | 568 | /** Unregister IRQ notification. |
569 | * |
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2471 | jermar | 570 | * @param inr IRQ number. |
571 | * @param devno Device number of the device generating inr. |
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1923 | jermar | 572 | * |
2471 | jermar | 573 | * @return Value returned by the kernel. |
1923 | jermar | 574 | */ |
575 | int ipc_unregister_irq(int inr, int devno) |
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1259 | palkovsky | 576 | { |
1923 | jermar | 577 | return __SYSCALL2(SYS_IPC_UNREGISTER_IRQ, inr, devno); |
1259 | palkovsky | 578 | } |
1330 | palkovsky | 579 | |
2471 | jermar | 580 | /** Forward a received call to another destination. |
581 | * |
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582 | * @param callid Hash of the call to forward. |
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583 | * @param phoneid Phone handle to use for forwarding. |
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584 | * @param method New method for the forwarded call. |
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585 | * @param arg1 New value of the first argument for the forwarded call. |
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586 | * |
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587 | * @return Zero on success or an error code. |
||
588 | * |
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589 | * For non-system methods, the old method and arg1 are rewritten by the new |
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590 | * values. For system methods, the new method and arg1 are written to the old |
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591 | * arg1 and arg2, respectivelly. |
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592 | */ |
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1336 | jermar | 593 | int ipc_forward_fast(ipc_callid_t callid, int phoneid, int method, ipcarg_t arg1) |
594 | { |
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595 | return __SYSCALL4(SYS_IPC_FORWARD_FAST, callid, phoneid, method, arg1); |
||
596 | } |
||
597 | |||
2522 | jermar | 598 | /** Wrapper for accepting the IPC_M_DATA_SEND calls. |
599 | * |
||
600 | * This wrapper only makes it more comfortable to accept IPC_M_DATA_SEND calls |
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601 | * so that the user doesn't have to remember the meaning of each IPC argument. |
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602 | * |
||
603 | * So far, this wrapper is to be used from within a connection fibril. |
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604 | * |
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605 | * @param callid Storage where the hash of the IPC_M_DATA_SEND call will |
||
606 | * be stored. |
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607 | * @param call Storage where the incoming call will be stored. |
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608 | * @param dst Storage where the suggested destination address will |
||
609 | * be stored. May be NULL. |
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610 | * @param size Storage where the suggested size will be stored. May be |
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611 | * NULL |
||
612 | * |
||
613 | * @return Non-zero on success, zero on failure. |
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614 | */ |
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615 | int ipc_data_send_accept(ipc_callid_t *callid, ipc_call_t *call, void **dst, |
||
616 | size_t *size) |
||
617 | { |
||
618 | assert(callid); |
||
619 | assert(call); |
||
620 | |||
621 | *callid = async_get_call(call); |
||
622 | if (IPC_GET_METHOD(*call) != IPC_M_DATA_SEND) |
||
623 | return 0; |
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624 | if (dst) |
||
625 | *dst = (void *) IPC_GET_ARG1(*call); |
||
626 | if (size) |
||
627 | *size = (size_t) IPC_GET_ARG3(*call); |
||
628 | return 1; |
||
629 | } |
||
630 | |||
631 | /** Wrapper for answering the IPC_M_DATA_SEND calls. |
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632 | * |
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633 | * This wrapper only makes it more comfortable to answer IPC_M_DATA_SEND calls |
||
634 | * so that the user doesn't have to remember the meaning of each IPC argument. |
||
635 | * |
||
636 | * @param callid Hash of the IPC_M_DATA_SEND call to answer. |
||
637 | * @param call Call structure with the request. |
||
638 | * @param dst Final destination address for the IPC_M_DATA_SEND call. |
||
639 | * @param size Final size for the IPC_M_DATA_SEND call. |
||
640 | * |
||
641 | * @return Zero on success or a value from @ref errno.h on failure. |
||
642 | */ |
||
643 | ipcarg_t ipc_data_send_answer(ipc_callid_t callid, ipc_call_t *call, void *dst, size_t size) |
||
644 | { |
||
645 | IPC_SET_RETVAL(*call, EOK); |
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646 | IPC_SET_ARG1(*call, (ipcarg_t) dst); |
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647 | IPC_SET_ARG3(*call, (ipcarg_t) size); |
||
648 | return ipc_answer(callid, call); |
||
649 | } |
||
650 | |||
1866 | jermar | 651 | /** @} |
1653 | cejka | 652 | */ |