| 0,0 → 1,142 |
|---|
| /* |
| * Copyright (c) 2009 Martin Decky |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** @addtogroup ns |
| * @{ |
| */ |
| |
| #include <ipc/ipc.h> |
| #include <ipc/services.h> |
| #include <libadt/list.h> |
| #include <bool.h> |
| #include <errno.h> |
| #include <assert.h> |
| #include <stdio.h> |
| #include <malloc.h> |
| #include "clonable.h" |
| #include "ns.h" |
| |
| /** Request for connection to a clonable service. */ |
| typedef struct { |
| link_t link; |
| ipcarg_t service; |
| ipc_call_t call; |
| ipc_callid_t callid; |
| } cs_req_t; |
| |
| /** List of clonable-service connection requests. */ |
| static link_t cs_req; |
| |
| int clonable_init(void) |
| { |
| list_initialize(&cs_req); |
| return EOK; |
| } |
| |
| /** Return true if @a service is clonable. */ |
| bool service_clonable(int service) |
| { |
| return (service == SERVICE_LOAD); |
| } |
| |
| /** Register clonable service. |
| * |
| * @param service Service to be registered. |
| * @param phone Phone to be used for connections to the service. |
| * @param call Pointer to call structure. |
| * |
| */ |
| void register_clonable(ipcarg_t service, ipcarg_t phone, ipc_call_t *call, |
| ipc_callid_t callid) |
| { |
| if (list_empty(&cs_req)) { |
| /* There was no pending connection request. */ |
| printf(NAME ": Unexpected clonable server.\n"); |
| ipc_answer_0(callid, EBUSY); |
| return; |
| } |
| |
| cs_req_t *csr = list_get_instance(cs_req.next, cs_req_t, link); |
| list_remove(&csr->link); |
| |
| /* Currently we can only handle a single type of clonable service. */ |
| assert(csr->service == SERVICE_LOAD); |
| |
| ipc_answer_0(callid, EOK); |
| |
| ipc_forward_fast(csr->callid, phone, IPC_GET_ARG2(csr->call), |
| IPC_GET_ARG3(csr->call), 0, IPC_FF_NONE); |
| |
| free(csr); |
| ipc_hangup(phone); |
| } |
| |
| /** Connect client to clonable service. |
| * |
| * @param service Service to be connected to. |
| * @param call Pointer to call structure. |
| * @param callid Call ID of the request. |
| * |
| * @return Zero on success or a value from @ref errno.h. |
| * |
| */ |
| void connect_to_clonable(ipcarg_t service, ipc_call_t *call, |
| ipc_callid_t callid) |
| { |
| assert(service == SERVICE_LOAD); |
| |
| cs_req_t *csr = malloc(sizeof(cs_req_t)); |
| if (csr == NULL) { |
| ipc_answer_0(callid, ENOMEM); |
| return; |
| } |
| |
| /* Spawn a loader. */ |
| int rc = loader_spawn("loader"); |
| |
| if (rc < 0) { |
| free(csr); |
| ipc_answer_0(callid, rc); |
| return; |
| } |
| |
| csr->service = service; |
| csr->call = *call; |
| csr->callid = callid; |
| |
| /* |
| * We can forward the call only after the server we spawned connects |
| * to us. Meanwhile we might need to service more connection requests. |
| * Thus we store the call in a queue. |
| */ |
| list_append(&csr->link, &cs_req); |
| } |
| |
| /** |
| * @} |
| */ |