1 /* $NetBSD: rf_callback.c,v 1.3 1999/02/05 00:06:06 oster Exp $ */ 2 /* 3 * Copyright (c) 1995 Carnegie-Mellon University. 4 * All rights reserved. 5 * 6 * Author: Jim Zelenka 7 * 8 * Permission to use, copy, modify and distribute this software and 9 * its documentation is hereby granted, provided that both the copyright 10 * notice and this permission notice appear in all copies of the 11 * software, derivative works or modified versions, and any portions 12 * thereof, and that both notices appear in supporting documentation. 13 * 14 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 15 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 16 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 17 * 18 * Carnegie Mellon requests users of this software to return to 19 * 20 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 21 * School of Computer Science 22 * Carnegie Mellon University 23 * Pittsburgh PA 15213-3890 24 * 25 * any improvements or extensions that they make and grant Carnegie the 26 * rights to redistribute these changes. 27 */ 28 29 /***************************************************************************************** 30 * 31 * callback.c -- code to manipulate callback descriptor 32 * 33 ****************************************************************************************/ 34 35 36 #include "rf_types.h" 37 #include "rf_threadstuff.h" 38 #include "rf_callback.h" 39 #include "rf_debugMem.h" 40 #include "rf_freelist.h" 41 #include "rf_shutdown.h" 42 43 static RF_FreeList_t *rf_callback_freelist; 44 45 #define RF_MAX_FREE_CALLBACK 64 46 #define RF_CALLBACK_INC 4 47 #define RF_CALLBACK_INITIAL 4 48 49 static void rf_ShutdownCallback(void *); 50 static void 51 rf_ShutdownCallback(ignored) 52 void *ignored; 53 { 54 RF_FREELIST_DESTROY(rf_callback_freelist, next, (RF_CallbackDesc_t *)); 55 } 56 57 int 58 rf_ConfigureCallback(listp) 59 RF_ShutdownList_t **listp; 60 { 61 int rc; 62 63 RF_FREELIST_CREATE(rf_callback_freelist, RF_MAX_FREE_CALLBACK, 64 RF_CALLBACK_INC, sizeof(RF_CallbackDesc_t)); 65 if (rf_callback_freelist == NULL) 66 return (ENOMEM); 67 rc = rf_ShutdownCreate(listp, rf_ShutdownCallback, NULL); 68 if (rc) { 69 RF_ERRORMSG3("Unable to add to shutdown list file %s line %d rc=%d\n", __FILE__, 70 __LINE__, rc); 71 rf_ShutdownCallback(NULL); 72 return (rc); 73 } 74 RF_FREELIST_PRIME(rf_callback_freelist, RF_CALLBACK_INITIAL, next, 75 (RF_CallbackDesc_t *)); 76 return (0); 77 } 78 79 RF_CallbackDesc_t * 80 rf_AllocCallbackDesc() 81 { 82 RF_CallbackDesc_t *p; 83 84 RF_FREELIST_GET(rf_callback_freelist, p, next, (RF_CallbackDesc_t *)); 85 return (p); 86 } 87 88 void 89 rf_FreeCallbackDesc(p) 90 RF_CallbackDesc_t *p; 91 { 92 RF_FREELIST_FREE(rf_callback_freelist, p, next); 93 } 94