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/*************************************************************************************************** |
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* Copyright (C) Vasiliy Kosenko (vkos), 2009 * |
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* This program is free software: you can redistribute it and/or modify it under the terms of the * |
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* GNU General Public License as published by the Free Software Foundation, either version 3 * |
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* of the License, or (at your option) any later version. * |
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* * |
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* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; * |
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See * |
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* the GNU General Public License for more details. * |
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* * |
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* You should have received a copy of the GNU General Public License along with this program. * |
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* If not, see . * |
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***************************************************************************************************/ |
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#include |
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#include |
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#include |
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#include |
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#include |
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/* |
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* High level IPC functions |
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*/ |
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IPCArea *ipc_area = NULL; |
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int IPCInit(void){ |
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ipc_area = malloc(IPC_BUFFER_SIZE); |
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if (!ipc_area) { |
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return IPC_NO_MEMORY; |
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} |
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return kolibri_IPC_init(ipc_area, IPC_BUFFER_SIZE); |
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} |
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int IPCSend(int tid, void *message, int length){ |
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int err_count = IPC_MAX_ERRORS; |
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int err; |
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while (--err_count) { |
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if (!(err = kolibri_IPC_send(tid, message, length)) || err == IPC_NO_AREA || err == IPC_NO_TID) { |
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return err; |
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} |
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} |
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return err; |
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} |
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bool IPCCheck(void){ |
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return IPCCheckWait(0); |
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} |
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bool IPCCheckWait(int time){ |
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int result = false; |
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int emask = kolibri_event_get_mask(); |
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kolibri_event_set_mask(KOLIBRI_EVENT_IPC_MASK); |
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result = kolibri_event_wait(time); |
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kolibri_event_set_mask(emask); |
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return result; |
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} |
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Message *IPCGetNextMessage(void){ |
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return IPCWaitMessage(0); |
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} |
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Message *IPCWaitMessage(int time){ |
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if (IPCCheckWait(time)){ |
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Message *msg_ret, *msg = kolibri_IPC_get_next_message(); |
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msg_ret = malloc(sizeof(Message)+msg->length); |
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if (!msg_ret) { |
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return NULL; |
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} |
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IPCLock(); |
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memcpy(msg_ret, msg, sizeof(Message)+msg->length); |
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ipc_area->size -= sizeof(Message)+msg->length; |
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memcpy(msg, msg+sizeof(Message)+msg->length, ipc_area->size); |
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IPCUnlock(); |
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return msg_ret; |
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} else { |
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return NULL; |
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} |
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} |
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/* |
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* Kolibri IPC functions & data |
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*/ |
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kolibri_IPC_area_t *kolibri_ipc_area; |
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int kolibri_IPC_set_area(void *area, int size){ |
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int result; |
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asm("int $0x40":"=a"(result):"a"(60),"b"(1),"c"(area),"d"(size)); |
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return result; |
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} |
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int kolibri_IPC_send(int tid, void *msg, int length){ |
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int result; |
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asm("movl %5, %%esi\nint $0x40":"=a"(result):"a"(60),"b"(2),"c"(tid),"d"(msg),"g"(length)); |
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return result; |
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} |
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void kolibri_IPC_unlock(){ |
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kolibri_ipc_area->lock = 0; |
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} |
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void kolibri_IPC_lock(){ |
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kolibri_ipc_area->lock = 1; |
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} |
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int kolibri_IPC_init(void *area, int size){ |
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kolibri_ipc_area = (kolibri_IPC_area_t *)area; |
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kolibri_ipc_area->size = 8; |
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return kolibri_IPC_set_area(area, size); |
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} |
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kolibri_IPC_message_t *kolibri_IPC_get_next_message(){ |
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kolibri_IPC_lock(); |
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return (kolibri_IPC_message_t *)((char *)kolibri_ipc_area+sizeof(kolibri_IPC_area_t)); |
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} |
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void IPCLock(void){ |
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kolibri_IPC_lock(); |
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} |
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void IPCUnlock(void){ |
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kolibri_IPC_unlock(); |
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} |
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// void kolibri_IPC_clear_buff(){ |
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// kolibri_ipc_area->size = 8; |
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// kolibri_IPC_unlock(); |
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// } |