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 #include <vector> 26 27 #include <systypes/base.h> 28 29 30 31 /* Collection data types. */ 32 33 typedef std::set<l4_cap_idx_t> NotifierSet; 34 35 /* Notification endpoint details. */ 36 37 class NotificationEndpoint 38 { 39 public: 40 NotifierSet notifiers; 41 notify_flags_t flags, deferred; 42 }; 43 44 typedef std::vector<NotificationEndpoint> NotificationEndpointList; 45 46 47 48 /* Notification support, allowing pipe or file users to receive events due to 49 activity on those objects. */ 50 51 class NotificationSupport 52 { 53 protected: 54 /* Endpoint count. */ 55 56 unsigned int _min_endpoints; 57 58 /* Notification endpoint details. */ 59 60 NotificationEndpointList _endpoints; 61 62 virtual void release_notifiers(); 63 64 public: 65 explicit NotificationSupport(unsigned int endpoints=0); 66 67 virtual void notify(unsigned int endpoint, notify_flags_t flags); 68 69 virtual void notify_others(unsigned int endpoint, notify_flags_t flags); 70 71 virtual void subscribe(unsigned int endpoint, l4_cap_idx_t notifier, notify_flags_t flags); 72 73 virtual void unsubscribe(unsigned int endpoint, l4_cap_idx_t notifier); 74 }; 75 76 // vim: tabstop=4 expandtab shiftwidth=4