0,0 → 1,143 |
/* |
* 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 <adt/list.h> |
#include <bool.h> |
#include <errno.h> |
#include <assert.h> |
#include <stdio.h> |
#include <malloc.h> |
#include <loader/loader.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); |
} |
|
/** |
* @} |
*/ |