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954 palkovsky 1
/*
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 * Copyright (C) 2006 Ondrej Palkovsky
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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#include <ipc.h>
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#include <libc.h>
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int ipc_call_sync(int phoneid, sysarg_t method, sysarg_t arg1,
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          sysarg_t *result)
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{
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    ipc_data_t resdata;
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    int callres;
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    callres = __SYSCALL4(SYS_IPC_CALL_SYNC, phoneid, method, arg1,
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                 (sysarg_t)&resdata);
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    if (callres)
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        return callres;
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    if (result)
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        *result = IPC_GET_ARG1(resdata);
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    return IPC_GET_RETVAL(resdata);
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}
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int ipc_call_sync_3(int phoneid, sysarg_t method, sysarg_t arg1,
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            sysarg_t arg2, sysarg_t arg3,
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            sysarg_t *result1, sysarg_t *result2, sysarg_t *result3)
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{
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    ipc_data_t data;
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    int callres;
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    IPC_SET_METHOD(data, method);
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    IPC_SET_ARG1(data, arg1);
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    IPC_SET_ARG2(data, arg2);
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    IPC_SET_ARG3(data, arg3);
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    callres = __SYSCALL2(SYS_IPC_CALL_SYNC_MEDIUM, phoneid, (sysarg_t)&data);
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    if (callres)
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        return callres;
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    if (result1)
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        *result1 = IPC_GET_ARG1(data);
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    if (result2)
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        *result2 = IPC_GET_ARG2(data);
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    if (result3)
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        *result3 = IPC_GET_ARG3(data);
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    return IPC_GET_RETVAL(data);
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}
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/** Send asynchronous message
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 *
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 * - if fatal error, call callback handler with proper error code
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 * - if message cannot be temporarily sent, add to queue
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 */
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void ipc_call_async_2(int phoneid, sysarg_t method, sysarg_t arg1,
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              sysarg_t arg2,
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              ipc_async_callback_t callback)
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{
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    ipc_callid_t callid;
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    ipc_data_t data; /* Data storage for saving calls */
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    callid = __SYSCALL4(SYS_IPC_CALL_ASYNC, phoneid, method, arg1, arg2);
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    if (callid == IPC_CALLRET_FATAL) {
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        /* Call asynchronous handler with error code */
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        IPC_SET_RETVAL(data, IPC_CALLRET_FATAL);
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        callback(&data);
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        return;
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    }
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    if (callid == IPC_CALLRET_TEMPORARY) {
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        /* Add asynchronous call to queue of non-dispatched async calls */
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        IPC_SET_METHOD(data, method);
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        IPC_SET_ARG1(data, arg1);
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        IPC_SET_ARG2(data, arg2);
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        return;
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    }
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    /* Add callid to list of dispatched calls */
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}
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/** Send answer to a received call */
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void ipc_answer(ipc_callid_t callid, sysarg_t retval, sysarg_t arg1,
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        sysarg_t arg2)
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{
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    __SYSCALL4(SYS_IPC_ANSWER, callid, retval, arg1, arg2);
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}
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/** Call syscall function sys_ipc_wait_for_call */
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static inline ipc_callid_t _ipc_wait_for_call(ipc_data_t *data, int flags)
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{
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    return __SYSCALL2(SYS_IPC_WAIT, (sysarg_t)data, flags);
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}
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/** Wait for IPC call and return
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 *
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 * - dispatch ASYNC reoutines in the background
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 */
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int ipc_wait_for_call(ipc_data_t *data, int flags)
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{
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    ipc_callid_t callid;
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    do {
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        /* Try to dispatch non-dispatched async calls */
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        callid = _ipc_wait_for_call(data, flags);
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        if (callid & IPC_CALLID_ANSWERED) {
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            /* TODO: Call async answer handler */
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        }
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    } while (callid & IPC_CALLID_ANSWERED);
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    return callid;
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}