1 /* $NetBSD: defer-internal.h,v 1.1.1.2 2017/01/31 21:14:52 christos Exp $ */ 2 /* 3 * Copyright (c) 2009-2012 Niels Provos and Nick Mathewson 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 #ifndef DEFER_INTERNAL_H_INCLUDED_ 28 #define DEFER_INTERNAL_H_INCLUDED_ 29 30 #ifdef __cplusplus 31 extern "C" { 32 #endif 33 34 #include "event2/event-config.h" 35 #include "evconfig-private.h" 36 37 #include <sys/queue.h> 38 39 struct event_callback; 40 typedef void (*deferred_cb_fn)(struct event_callback *, void *); 41 42 /** 43 Initialize an empty, non-pending event_callback. 44 45 @param deferred The struct event_callback structure to initialize. 46 @param priority The priority that the callback should run at. 47 @param cb The function to run when the struct event_callback executes. 48 @param arg The function's second argument. 49 */ 50 void event_deferred_cb_init_(struct event_callback *, ev_uint8_t, deferred_cb_fn, void *); 51 /** 52 Change the priority of a non-pending event_callback. 53 */ 54 void event_deferred_cb_set_priority_(struct event_callback *, ev_uint8_t); 55 /** 56 Cancel a struct event_callback if it is currently scheduled in an event_base. 57 */ 58 void event_deferred_cb_cancel_(struct event_base *, struct event_callback *); 59 /** 60 Activate a struct event_callback if it is not currently scheduled in an event_base. 61 62 Return true if it was not previously scheduled. 63 */ 64 int event_deferred_cb_schedule_(struct event_base *, struct event_callback *); 65 66 #ifdef __cplusplus 67 } 68 #endif 69 70 #endif /* EVENT_INTERNAL_H_INCLUDED_ */ 71 72