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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. #ifndef _libc_ASYNC_H_
  30. #define _libc_ASYNC_H_
  31.  
  32. #include <ipc/ipc.h>
  33. #include <psthread.h>
  34. #include <sys/time.h>
  35. #include <atomic.h>
  36.  
  37. typedef ipc_callid_t aid_t;
  38. typedef void (*async_client_conn_t)(ipc_callid_t callid, ipc_call_t *call);
  39.  
  40. static inline void async_manager(void)
  41. {
  42.     psthread_schedule_next_adv(PS_TO_MANAGER);
  43. }
  44.  
  45. ipc_callid_t async_get_call_timeout(ipc_call_t *call, suseconds_t usecs);
  46. static inline ipc_callid_t async_get_call(ipc_call_t *data)
  47. {
  48.     return async_get_call_timeout(data, 0);
  49. }
  50.  
  51. aid_t async_send_2(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2,
  52.            ipc_call_t *dataptr);
  53. aid_t async_send_3(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2,
  54.            ipcarg_t arg3, ipc_call_t *dataptr);
  55. void async_wait_for(aid_t amsgid, ipcarg_t *result);
  56. int async_wait_timeout(aid_t amsgid, ipcarg_t *retval, suseconds_t timeout);
  57.  
  58. /** Pseudo-synchronous message sending
  59.  *
  60.  * Send message through IPC, wait in the event loop, until it is received
  61.  *
  62.  * @return Return code of message
  63.  */
  64. static inline ipcarg_t async_req_2(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2, ipcarg_t *r1, ipcarg_t *r2)
  65. {
  66.     ipc_call_t result;
  67.     ipcarg_t rc;
  68.  
  69.     aid_t eid = async_send_2(phoneid, method, arg1, arg2, &result);
  70.     async_wait_for(eid, &rc);
  71.     if (r1)
  72.         *r1 = IPC_GET_ARG1(result);
  73.     if (r2)
  74.         *r2 = IPC_GET_ARG2(result);
  75.     return rc;
  76. }
  77. #define async_req(phoneid, method, arg1, r1) async_req_2(phoneid, method, arg1, 0, r1, 0)
  78.  
  79. static inline ipcarg_t async_req_3(int phoneid, ipcarg_t method, ipcarg_t arg1,
  80.                    ipcarg_t arg2, ipcarg_t arg3, ipcarg_t *r1,
  81.                    ipcarg_t *r2, ipcarg_t *r3)
  82. {
  83.     ipc_call_t result;
  84.     ipcarg_t rc;
  85.  
  86.     aid_t eid = async_send_3(phoneid, method, arg1, arg2, arg3, &result);
  87.     async_wait_for(eid, &rc);
  88.     if (r1)
  89.         *r1 = IPC_GET_ARG1(result);
  90.     if (r2)
  91.         *r2 = IPC_GET_ARG2(result);
  92.     if (r3)
  93.         *r3 = IPC_GET_ARG3(result);
  94.     return rc;
  95. }
  96.  
  97.  
  98. pstid_t async_new_connection(ipcarg_t in_phone_hash,ipc_callid_t callid,
  99.                  ipc_call_t *call,
  100.                  void (*cthread)(ipc_callid_t,ipc_call_t *));
  101. void async_usleep(suseconds_t timeout);
  102. void async_create_manager(void);
  103. void async_destroy_manager(void);
  104. void async_set_client_connection(async_client_conn_t conn);
  105. void async_set_interrupt_received(async_client_conn_t conn);
  106. int _async_init(void);
  107.  
  108.  
  109. /* Primitve functions for IPC communication */
  110. void async_msg_3(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2,
  111.          ipcarg_t arg3);
  112. void async_msg_2(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2);
  113. #define async_msg(ph,m,a1) async_msg_2(ph,m,a1,0)
  114.  
  115. static inline void async_serialize_start(void)
  116. {
  117.     psthread_inc_sercount();
  118. }
  119. static inline void async_serialize_end(void)
  120. {
  121.     psthread_dec_sercount();
  122. }
  123.  
  124. extern atomic_t async_futex;
  125. #endif
  126.