1 /* $NetBSD: rf_callback.c,v 1.1 1998/11/13 04:20:26 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 * Log: rf_callback.c,v 37 * Revision 1.11 1996/06/17 03:18:04 jimz 38 * include shutdown.h for macroized ShutdownCreate 39 * 40 * Revision 1.10 1996/06/10 11:55:47 jimz 41 * Straightened out some per-array/not-per-array distinctions, fixed 42 * a couple bugs related to confusion. Added shutdown lists. Removed 43 * layout shutdown function (now subsumed by shutdown lists). 44 * 45 * Revision 1.9 1996/05/23 21:46:35 jimz 46 * checkpoint in code cleanup (release prep) 47 * lots of types, function names have been fixed 48 * 49 * Revision 1.8 1996/05/18 19:51:34 jimz 50 * major code cleanup- fix syntax, make some types consistent, 51 * add prototypes, clean out dead code, et cetera 52 * 53 * Revision 1.7 1996/05/17 16:30:41 jimz 54 * convert to RF_FREELIST stuff 55 * 56 * Revision 1.6 1995/12/01 15:16:04 root 57 * added copyright info 58 * 59 */ 60 61 #ifndef _KERNEL 62 #ifdef __NetBSD__ 63 #include <unistd.h> 64 #endif /* __NetBSD__ */ 65 #endif 66 67 #include "rf_types.h" 68 #include "rf_threadstuff.h" 69 #include "rf_callback.h" 70 #include "rf_debugMem.h" 71 #include "rf_freelist.h" 72 #include "rf_shutdown.h" 73 74 static RF_FreeList_t *rf_callback_freelist; 75 76 #define RF_MAX_FREE_CALLBACK 64 77 #define RF_CALLBACK_INC 4 78 #define RF_CALLBACK_INITIAL 4 79 80 static void rf_ShutdownCallback(void *); 81 static void rf_ShutdownCallback(ignored) 82 void *ignored; 83 { 84 RF_FREELIST_DESTROY(rf_callback_freelist,next,(RF_CallbackDesc_t *)); 85 } 86 87 int rf_ConfigureCallback(listp) 88 RF_ShutdownList_t **listp; 89 { 90 int rc; 91 92 RF_FREELIST_CREATE(rf_callback_freelist, RF_MAX_FREE_CALLBACK, 93 RF_CALLBACK_INC, sizeof(RF_CallbackDesc_t)); 94 if (rf_callback_freelist == NULL) 95 return(ENOMEM); 96 rc = rf_ShutdownCreate(listp, rf_ShutdownCallback, NULL); 97 if (rc) { 98 RF_ERRORMSG3("Unable to add to shutdown list file %s line %d rc=%d\n", __FILE__, 99 __LINE__, rc); 100 rf_ShutdownCallback(NULL); 101 return(rc); 102 } 103 RF_FREELIST_PRIME(rf_callback_freelist, RF_CALLBACK_INITIAL,next, 104 (RF_CallbackDesc_t *)); 105 return(0); 106 } 107 108 RF_CallbackDesc_t *rf_AllocCallbackDesc() 109 { 110 RF_CallbackDesc_t *p; 111 112 RF_FREELIST_GET(rf_callback_freelist,p,next,(RF_CallbackDesc_t *)); 113 return(p); 114 } 115 116 void rf_FreeCallbackDesc(p) 117 RF_CallbackDesc_t *p; 118 { 119 RF_FREELIST_FREE(rf_callback_freelist,p,next); 120 } 121