1 /* 2 * Notification support. 3 * 4 * Copyright (C) 2021 Paul Boddie <paul@boddie.org.uk> 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License as 8 * published by the Free Software Foundation; either version 2 of 9 * the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, 19 * Boston, MA 02110-1301, USA 20 */ 21 22 #pragma once 23 24 #include <set> 25 26 #include <systypes/base.h> 27 28 29 30 /* Notification support, allowing pipe or file users to receive events due to 31 activity on those objects. */ 32 33 class NotificationSupport 34 { 35 protected: 36 /* Endpoint count. */ 37 38 unsigned int _max_endpoints; 39 40 /* Notification endpoints and flags, set up at initialisation for the 41 appropriate number of endpoints. */ 42 43 std::set<l4_cap_idx_t> *_notifiers; 44 notify_flags_t *_flags, *_deferred; 45 46 virtual void release_notifiers(); 47 48 public: 49 explicit NotificationSupport(unsigned int endpoints); 50 51 virtual ~NotificationSupport(); 52 53 virtual void notify(unsigned int endpoint, notify_flags_t flags, l4_cap_idx_t source=L4_INVALID_CAP); 54 55 virtual void subscribe(unsigned int endpoint, l4_cap_idx_t notifier, notify_flags_t flags); 56 57 virtual void unsubscribe(unsigned int endpoint, l4_cap_idx_t notifier); 58 }; 59 60 // vim: tabstop=4 expandtab shiftwidth=4