1 /* ----------------------------------------------------------------------- * 2 * 3 * Copyright 2007-2009 H. Peter Anvin - All Rights Reserved 4 * Copyright 2009 H. Peter Anvin - All Rights Reserved 5 * 6 * Permission is hereby granted, free of charge, to any person 7 * obtaining a copy of this software and associated documentation 8 * files (the "Software"), to deal in the Software without 9 * restriction, including without limitation the rights to use, 10 * copy, modify, merge, publish, distribute, sublicense, and/or 11 * sell copies of the Software, and to permit persons to whom 12 * the Software is furnished to do so, subject to the following 13 * conditions: 14 * 15 * The above copyright notice and this permission notice shall 16 * be included in all copies or substantial portions of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 19 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES 20 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 21 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 22 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 23 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 24 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 25 * OTHER DEALINGS IN THE SOFTWARE. 26 * 27 * ----------------------------------------------------------------------- */ 28 29 /* 30 * memscan.c 31 * 32 * Query the system for free memory 33 */ 34 35 #include <syslinux/memscan.h> 36 37 static LIST_HEAD(syslinux_memscan_head); 38 39 /* 40 * Add a memscan entry to the list. 41 */ 42 void syslinux_memscan_add(struct syslinux_memscan *entry) 43 { 44 list_add(&entry->next, &syslinux_memscan_head); 45 } 46 47 /* 48 * Build a new memscan entry and add it to the list. 49 */ 50 int syslinux_memscan_new(int func(scan_memory_callback_t, void *data)) 51 { 52 struct syslinux_memscan *entry; 53 54 entry = malloc(sizeof *entry); 55 if (!entry) 56 return -1; 57 58 entry->func = func; 59 syslinux_memscan_add(entry); 60 return 0; 61 } 62 63 int syslinux_scan_memory(scan_memory_callback_t callback, void *data) 64 { 65 struct syslinux_memscan *entry; 66 int rv = 0; 67 68 list_for_each_entry(entry, &syslinux_memscan_head, next) { 69 rv = entry->func(callback, data); 70 if (rv) 71 break; 72 } 73 74 return rv; 75 } 76
