1/*- 2 * See the file LICENSE for redistribution information. 3 * 4 * Copyright (c) 1998,2008 Oracle. All rights reserved. 5 * 6 * $Id: os_config.c,v 12.11 2008/03/12 18:19:06 sue Exp $ 7 */ 8 9#include "db_config.h" 10 11#include "db_int.h" 12 13/* 14 * __os_fs_notzero -- 15 * Return 1 if allocated filesystem blocks are not zeroed. 16 * 17 * PUBLIC: int __os_fs_notzero __P((void)); 18 */ 19int 20__os_fs_notzero() 21{ 22 /* Most filesystems zero out implicitly created pages. */ 23 return (0); 24} 25 26/* 27 * __os_support_direct_io -- 28 * Return 1 if we support direct I/O. 29 * 30 * PUBLIC: int __os_support_direct_io __P((void)); 31 */ 32int 33__os_support_direct_io() 34{ 35 int ret; 36 37 ret = 0; 38 39#ifdef HAVE_O_DIRECT 40 ret = 1; 41#endif 42#if defined(HAVE_DIRECTIO) && defined(DIRECTIO_ON) 43 ret = 1; 44#endif 45 return (ret); 46} 47 48/* 49 * __os_support_db_register -- 50 * Return 1 if the system supports DB_REGISTER. 51 * 52 * PUBLIC: int __os_support_db_register __P((void)); 53 */ 54int 55__os_support_db_register() 56{ 57 return (1); 58} 59 60/* 61 * __os_support_replication -- 62 * Return 1 if the system supports replication. 63 * 64 * PUBLIC: int __os_support_replication __P((void)); 65 */ 66int 67__os_support_replication() 68{ 69 return (1); 70} 71