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  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. #include <ipc.h>
  30. #include <libc.h>
  31.  
  32. int ipc_call_sync(int phoneid, sysarg_t method, sysarg_t arg1,
  33.           sysarg_t *result)
  34. {
  35.     ipc_data_t resdata;
  36.     int callres;
  37.    
  38.     callres = __SYSCALL4(SYS_IPC_CALL_SYNC, phoneid, method, arg1,
  39.                  (sysarg_t)&resdata);
  40.     if (callres)
  41.         return callres;
  42.     if (result)
  43.         *result = IPC_GET_ARG1(resdata);
  44.     return IPC_GET_RETVAL(resdata);
  45. }
  46.  
  47. int ipc_call_sync_3(int phoneid, sysarg_t method, sysarg_t arg1,
  48.             sysarg_t arg2, sysarg_t arg3,
  49.             sysarg_t *result1, sysarg_t *result2, sysarg_t *result3)
  50. {
  51.     ipc_data_t data;
  52.     int callres;
  53.  
  54.     IPC_SET_METHOD(data, method);
  55.     IPC_SET_ARG1(data, arg1);
  56.     IPC_SET_ARG2(data, arg2);
  57.     IPC_SET_ARG3(data, arg3);
  58.  
  59.     callres = __SYSCALL2(SYS_IPC_CALL_SYNC_MEDIUM, phoneid, (sysarg_t)&data);
  60.     if (callres)
  61.         return callres;
  62.  
  63.     if (result1)
  64.         *result1 = IPC_GET_ARG1(data);
  65.     if (result2)
  66.         *result2 = IPC_GET_ARG2(data);
  67.     if (result3)
  68.         *result3 = IPC_GET_ARG3(data);
  69.     return IPC_GET_RETVAL(data);
  70. }
  71.  
  72. /** Send asynchronous message
  73.  *
  74.  * - if fatal error, call callback handler with proper error code
  75.  * - if message cannot be temporarily sent, add to queue
  76.  */
  77. void ipc_call_async_2(int phoneid, sysarg_t method, sysarg_t arg1,
  78.               sysarg_t arg2,
  79.               ipc_async_callback_t callback)
  80. {
  81.     ipc_callid_t callid;
  82.     ipc_data_t data; /* Data storage for saving calls */
  83.  
  84.     callid = __SYSCALL4(SYS_IPC_CALL_ASYNC, phoneid, method, arg1, arg2);
  85.     if (callid == IPC_CALLRET_FATAL) {
  86.         /* Call asynchronous handler with error code */
  87.         IPC_SET_RETVAL(data, IPC_CALLRET_FATAL);
  88.         callback(&data);
  89.         return;
  90.     }
  91.     if (callid == IPC_CALLRET_TEMPORARY) {
  92.         /* Add asynchronous call to queue of non-dispatched async calls */
  93.         IPC_SET_METHOD(data, method);
  94.         IPC_SET_ARG1(data, arg1);
  95.         IPC_SET_ARG2(data, arg2);
  96.        
  97.         return;
  98.     }
  99.     /* Add callid to list of dispatched calls */
  100.    
  101. }
  102.  
  103.  
  104. /** Send answer to a received call */
  105. void ipc_answer(ipc_callid_t callid, sysarg_t retval, sysarg_t arg1,
  106.         sysarg_t arg2)
  107. {
  108.     __SYSCALL4(SYS_IPC_ANSWER, callid, retval, arg1, arg2);
  109. }
  110.  
  111.  
  112. /** Call syscall function sys_ipc_wait_for_call */
  113. static inline ipc_callid_t _ipc_wait_for_call(ipc_data_t *data, int flags)
  114. {
  115.     return __SYSCALL2(SYS_IPC_WAIT, (sysarg_t)data, flags);
  116. }
  117.  
  118. /** Wait for IPC call and return
  119.  *
  120.  * - dispatch ASYNC reoutines in the background
  121.  */
  122. int ipc_wait_for_call(ipc_data_t *data, int flags)
  123. {
  124.     ipc_callid_t callid;
  125.  
  126.     do {
  127.         /* Try to dispatch non-dispatched async calls */
  128.         callid = _ipc_wait_for_call(data, flags);
  129.         if (callid & IPC_CALLID_ANSWERED) {
  130.             /* TODO: Call async answer handler */
  131.         }
  132.     } while (callid & IPC_CALLID_ANSWERED);
  133.     return callid;
  134. }
  135.