1 /* 2 * util/shm_side/shm_main.h - control the shared memory for unbound. 3 * 4 * Copyright (c) 2007, NLnet Labs. All rights reserved. 5 * 6 * This software is open source. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * Redistributions of source code must retain the above copyright notice, 13 * this list of conditions and the following disclaimer. 14 * 15 * Redistributions in binary form must reproduce the above copyright notice, 16 * this list of conditions and the following disclaimer in the documentation 17 * and/or other materials provided with the distribution. 18 * 19 * Neither the name of the NLNET LABS nor the names of its contributors may 20 * be used to endorse or promote products derived from this software without 21 * specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 24 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 26 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 27 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 29 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 30 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 /** 37 * \file 38 * 39 * This file contains functions for the SHM side. 40 */ 41 42 #ifndef UTIL_SHM_SIDE_MAIN_H 43 #define UTIL_SHM_SIDE_MAIN_H 44 struct daemon; 45 struct worker; 46 47 /* get struct ub_shm_stat_info */ 48 #include "libunbound/unbound.h" 49 50 #include "util/locks.h" 51 52 /** 53 * The SHM info. 54 */ 55 struct shm_main_info { 56 /** stats_info array, shared memory segment. 57 * [0] is totals, [1..thread_num] are per-thread stats */ 58 struct ub_stats_info* ptr_arr; 59 /** the global stats block, shared memory segment */ 60 struct ub_shm_stat_info* ptr_ctl; 61 int key; 62 int id_ctl; 63 int id_arr; 64 65 /** This mutex is on the volley information. */ 66 lock_basic_type lock; 67 /** If there is a volley, a number of stat timer callbacks by the 68 * threads, in progress. If not, there is no volley in progress and the 69 * previous stat run has terminated succesfully for all threads. 70 * Usually activated by the first thread and deactivated by the last 71 * thread that starts its stat callback. */ 72 int volley_in_progress; 73 /** Per thread, if they have put in stats. 0 if not. */ 74 int* thread_volley; 75 /** The total stats of the thread stat timers, it is in progress */ 76 struct ub_stats_info total_in_progress; 77 }; 78 79 int shm_main_init(struct daemon* daemon); 80 void shm_main_shutdown(struct daemon* daemon); 81 void shm_main_run(struct worker *worker); 82 83 #endif /* UTIL_SHM_SIDE_MAIN_H */ 84