forked from xuos/xiuos
114 lines
4.3 KiB
C
114 lines
4.3 KiB
C
/*
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* Copyright (c) 2020 AIIT XUOS Lab
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* XiUOS is licensed under Mulan PSL v2.
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* You can use this software according to the terms and conditions of the Mulan PSL v2.
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* You may obtain a copy of Mulan PSL v2 at:
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* http://license.coscl.org.cn/MulanPSL2
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PSL v2 for more details.
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*/
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/**
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* @file sys_poll_session.c
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* @brief server poll its connected sessions
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* @version 3.0
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* @author AIIT XUOS Lab
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* @date 2023.08.25
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*/
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/*************************************************
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File name: sys_poll_session.c
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Description: server poll its connected sessions
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Others:
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History:
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1. Date: 2023-08-28
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Author: AIIT XUOS Lab
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Modification:
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1. first version
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*************************************************/
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#include "assert.h"
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#include "ipc.h"
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#include "multicores.h"
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#include "share_page.h"
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#include "syscall.h"
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#include "task.h"
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extern bool ksemaphore_wait(struct XiziSemaphorePool* sem_pool, struct Thread* thd, sem_id_t sem_id);
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int sys_poll_session(struct Session* userland_session_arr, int arr_capacity)
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{
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struct Thread* cur_task = cur_cpu()->task;
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if (cur_task == NULL) {
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ERROR("%s by killed task\n");
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return -1;
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}
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/* update old sessions */
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int cur_userland_idx = 0;
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while (!queue_is_empty(&cur_task->sessions_in_handle)) {
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struct server_session* server_session = (struct server_session*)queue_front(&cur_task->sessions_in_handle)->data;
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// wrong session info
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if (userland_session_arr[cur_userland_idx].id != SERVER_SESSION_BACKEND(server_session)->session_id || //
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(uintptr_t)userland_session_arr[cur_userland_idx].buf != server_session->buf_addr) {
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ERROR("mismatched old session from %s, user buf: %x, server buf: %x\n", cur_task->name, userland_session_arr[cur_userland_idx].buf, server_session->buf_addr);
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return -1;
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}
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// update session_backend
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ksemaphore_signal(&xizi_task_manager.semaphore_pool, SERVER_SESSION_BACKEND(server_session)->client_sem_to_wait);
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server_session->head = userland_session_arr[cur_userland_idx].head;
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server_session->tail = userland_session_arr[cur_userland_idx].tail;
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userland_session_arr[cur_userland_idx].buf = NULL;
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userland_session_arr[cur_userland_idx].id = -1;
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dequeue(&cur_task->sessions_in_handle);
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cur_userland_idx++;
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}
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int nr_handled_calls = cur_userland_idx;
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/* poll with new sessions */
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cur_userland_idx = 0;
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while (!queue_is_empty(&cur_task->sessions_to_be_handle)) {
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if (cur_userland_idx == arr_capacity) {
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break;
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}
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struct server_session* server_session = (struct server_session*)queue_front(&cur_task->sessions_to_be_handle)->data;
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if (SERVER_SESSION_BACKEND(server_session)->client_side.closed) {
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// client had closed it, then server will close it too
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struct session_backend* session_backend = SERVER_SESSION_BACKEND(server_session);
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assert(session_backend->server == cur_task);
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assert(session_backend->client == NULL);
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assert(server_session->closed == false);
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server_session->closed = true;
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xizi_share_page_manager.delete_share_pages(session_backend);
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dequeue(&cur_task->sessions_to_be_handle);
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continue;
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}
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userland_session_arr[cur_userland_idx++] = (struct Session) {
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.buf = (void*)server_session->buf_addr,
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.capacity = server_session->capacity,
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.head = server_session->head,
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.tail = server_session->tail,
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.id = SERVER_SESSION_BACKEND(server_session)->session_id,
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};
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enqueue(&cur_task->sessions_in_handle, 0, (void*)server_session);
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dequeue(&cur_task->sessions_to_be_handle);
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}
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// end of userland copy
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if (cur_userland_idx < arr_capacity) {
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userland_session_arr[cur_userland_idx].buf = NULL;
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}
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if (queue_is_empty(&cur_task->sessions_in_handle) && queue_is_empty(&cur_task->sessions_to_be_handle)) {
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xizi_task_manager.task_yield_noschedule(cur_task, false);
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xizi_task_manager.task_block(&xizi_task_manager.task_blocked_list_head, cur_task);
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}
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return 0;
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} |