1 /* $NetBSD: rf_callback.c,v 1.6 2001/11/13 07:11:12 lukem 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 <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: rf_callback.c,v 1.6 2001/11/13 07:11:12 lukem Exp $"); 38 39 #include <dev/raidframe/raidframevar.h> 40 41 #include "rf_archs.h" 42 #include "rf_threadstuff.h" 43 #include "rf_callback.h" 44 #include "rf_debugMem.h" 45 #include "rf_freelist.h" 46 #include "rf_shutdown.h" 47 48 static RF_FreeList_t *rf_callback_freelist; 49 50 #define RF_MAX_FREE_CALLBACK 64 51 #define RF_CALLBACK_INC 4 52 #define RF_CALLBACK_INITIAL 4 53 54 static void rf_ShutdownCallback(void *); 55 static void 56 rf_ShutdownCallback(ignored) 57 void *ignored; 58 { 59 RF_FREELIST_DESTROY(rf_callback_freelist, next, (RF_CallbackDesc_t *)); 60 } 61 62 int 63 rf_ConfigureCallback(listp) 64 RF_ShutdownList_t **listp; 65 { 66 int rc; 67 68 RF_FREELIST_CREATE(rf_callback_freelist, RF_MAX_FREE_CALLBACK, 69 RF_CALLBACK_INC, sizeof(RF_CallbackDesc_t)); 70 if (rf_callback_freelist == NULL) 71 return (ENOMEM); 72 rc = rf_ShutdownCreate(listp, rf_ShutdownCallback, NULL); 73 if (rc) { 74 RF_ERRORMSG3("Unable to add to shutdown list file %s line %d rc=%d\n", __FILE__, 75 __LINE__, rc); 76 rf_ShutdownCallback(NULL); 77 return (rc); 78 } 79 RF_FREELIST_PRIME(rf_callback_freelist, RF_CALLBACK_INITIAL, next, 80 (RF_CallbackDesc_t *)); 81 return (0); 82 } 83 84 RF_CallbackDesc_t * 85 rf_AllocCallbackDesc() 86 { 87 RF_CallbackDesc_t *p; 88 89 RF_FREELIST_GET(rf_callback_freelist, p, next, (RF_CallbackDesc_t *)); 90 return (p); 91 } 92 93 void 94 rf_FreeCallbackDesc(p) 95 RF_CallbackDesc_t *p; 96 { 97 RF_FREELIST_FREE(rf_callback_freelist, p, next); 98 } 99