1*7c478bd9Sstevel@tonic-gate /* 2*7c478bd9Sstevel@tonic-gate * CDDL HEADER START 3*7c478bd9Sstevel@tonic-gate * 4*7c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*7c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*7c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*7c478bd9Sstevel@tonic-gate * with the License. 8*7c478bd9Sstevel@tonic-gate * 9*7c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*7c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*7c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 12*7c478bd9Sstevel@tonic-gate * and limitations under the License. 13*7c478bd9Sstevel@tonic-gate * 14*7c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*7c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*7c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*7c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*7c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*7c478bd9Sstevel@tonic-gate * 20*7c478bd9Sstevel@tonic-gate * CDDL HEADER END 21*7c478bd9Sstevel@tonic-gate */ 22*7c478bd9Sstevel@tonic-gate /* 23*7c478bd9Sstevel@tonic-gate * db_vers.cc 24*7c478bd9Sstevel@tonic-gate * 25*7c478bd9Sstevel@tonic-gate * Copyright (c) 1988-2000 by Sun Microsystems, Inc. 26*7c478bd9Sstevel@tonic-gate * All Rights Reserved. 27*7c478bd9Sstevel@tonic-gate */ 28*7c478bd9Sstevel@tonic-gate 29*7c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 30*7c478bd9Sstevel@tonic-gate 31*7c478bd9Sstevel@tonic-gate #include <stdio.h> 32*7c478bd9Sstevel@tonic-gate #include <string.h> 33*7c478bd9Sstevel@tonic-gate 34*7c478bd9Sstevel@tonic-gate #include "db_headers.h" 35*7c478bd9Sstevel@tonic-gate #include "db_vers.h" 36*7c478bd9Sstevel@tonic-gate #include "nisdb_mt.h" 37*7c478bd9Sstevel@tonic-gate 38*7c478bd9Sstevel@tonic-gate const long unsigned MAXLOW = 32768*32768; 39*7c478bd9Sstevel@tonic-gate 40*7c478bd9Sstevel@tonic-gate /* Constructor that makes copy of 'other'. */ 41*7c478bd9Sstevel@tonic-gate vers::vers(vers* other) 42*7c478bd9Sstevel@tonic-gate { 43*7c478bd9Sstevel@tonic-gate INITRW(vers); 44*7c478bd9Sstevel@tonic-gate assign(other); 45*7c478bd9Sstevel@tonic-gate } 46*7c478bd9Sstevel@tonic-gate 47*7c478bd9Sstevel@tonic-gate void 48*7c478bd9Sstevel@tonic-gate vers::assign(vers* other) 49*7c478bd9Sstevel@tonic-gate { 50*7c478bd9Sstevel@tonic-gate WRITELOCKV(this, "w vers::assign"); 51*7c478bd9Sstevel@tonic-gate if (other == NULL) { 52*7c478bd9Sstevel@tonic-gate syslog(LOG_ERR, "vers::vers: making copy of null vers?"); 53*7c478bd9Sstevel@tonic-gate vers_high = vers_low = time_sec = time_usec = 0; 54*7c478bd9Sstevel@tonic-gate } else { 55*7c478bd9Sstevel@tonic-gate time_sec = other->time_sec; 56*7c478bd9Sstevel@tonic-gate time_usec = other->time_usec; 57*7c478bd9Sstevel@tonic-gate vers_low = other->vers_low; 58*7c478bd9Sstevel@tonic-gate vers_high = other->vers_high; 59*7c478bd9Sstevel@tonic-gate } 60*7c478bd9Sstevel@tonic-gate WRITEUNLOCKV(this, "wu vers::assign"); 61*7c478bd9Sstevel@tonic-gate } 62*7c478bd9Sstevel@tonic-gate 63*7c478bd9Sstevel@tonic-gate /* 64*7c478bd9Sstevel@tonic-gate * Creates new 'vers' with next higher minor version. 65*7c478bd9Sstevel@tonic-gate * If minor version exceeds MAXLOW, bump up major version instead. 66*7c478bd9Sstevel@tonic-gate * Set timestamp to that of the current time. 67*7c478bd9Sstevel@tonic-gate */ 68*7c478bd9Sstevel@tonic-gate vers* 69*7c478bd9Sstevel@tonic-gate vers::nextminor() 70*7c478bd9Sstevel@tonic-gate { 71*7c478bd9Sstevel@tonic-gate READLOCK(this, NULL, "r vers::nextminor"); 72*7c478bd9Sstevel@tonic-gate 73*7c478bd9Sstevel@tonic-gate vers * newvers = new vers; 74*7c478bd9Sstevel@tonic-gate 75*7c478bd9Sstevel@tonic-gate if (newvers == NULL) { 76*7c478bd9Sstevel@tonic-gate READUNLOCK(this, NULL, "ru vers::nextminor DB_MEMORY_LIMIT"); 77*7c478bd9Sstevel@tonic-gate FATAL3("vers::nextminor: cannot allocation space", 78*7c478bd9Sstevel@tonic-gate DB_MEMORY_LIMIT, NULL); 79*7c478bd9Sstevel@tonic-gate } 80*7c478bd9Sstevel@tonic-gate 81*7c478bd9Sstevel@tonic-gate struct timeval mt; 82*7c478bd9Sstevel@tonic-gate gettimeofday(&mt, NULL); 83*7c478bd9Sstevel@tonic-gate 84*7c478bd9Sstevel@tonic-gate newvers->time_sec = (unsigned int) mt.tv_sec; 85*7c478bd9Sstevel@tonic-gate newvers->time_usec = (unsigned int) mt.tv_usec; 86*7c478bd9Sstevel@tonic-gate newvers->vers_low = (this->vers_low + 1); 87*7c478bd9Sstevel@tonic-gate newvers->vers_high = (this->vers_high); 88*7c478bd9Sstevel@tonic-gate 89*7c478bd9Sstevel@tonic-gate if (newvers->vers_low >= MAXLOW){ 90*7c478bd9Sstevel@tonic-gate newvers->vers_high++; 91*7c478bd9Sstevel@tonic-gate newvers->vers_low = 0; 92*7c478bd9Sstevel@tonic-gate } 93*7c478bd9Sstevel@tonic-gate 94*7c478bd9Sstevel@tonic-gate READUNLOCK(this, newvers, "ru vers::nextminor"); 95*7c478bd9Sstevel@tonic-gate return (newvers); 96*7c478bd9Sstevel@tonic-gate } 97*7c478bd9Sstevel@tonic-gate 98*7c478bd9Sstevel@tonic-gate /* 99*7c478bd9Sstevel@tonic-gate * Creates new 'vers' with next higher major version. 100*7c478bd9Sstevel@tonic-gate * Set timestamp to that of the current time. 101*7c478bd9Sstevel@tonic-gate */ 102*7c478bd9Sstevel@tonic-gate vers* 103*7c478bd9Sstevel@tonic-gate vers::nextmajor() 104*7c478bd9Sstevel@tonic-gate { 105*7c478bd9Sstevel@tonic-gate READLOCK(this, NULL, "r vers::nextmajor"); 106*7c478bd9Sstevel@tonic-gate 107*7c478bd9Sstevel@tonic-gate vers * newvers = new vers; 108*7c478bd9Sstevel@tonic-gate 109*7c478bd9Sstevel@tonic-gate if (newvers == NULL) { 110*7c478bd9Sstevel@tonic-gate READUNLOCK(this, NULL, "ru vers::nextmajor DB_MEMORY_LIMIT"); 111*7c478bd9Sstevel@tonic-gate FATAL3("vers::nextminor: cannot allocation space", 112*7c478bd9Sstevel@tonic-gate DB_MEMORY_LIMIT, NULL); 113*7c478bd9Sstevel@tonic-gate } 114*7c478bd9Sstevel@tonic-gate 115*7c478bd9Sstevel@tonic-gate struct timeval mt; 116*7c478bd9Sstevel@tonic-gate gettimeofday(&mt, NULL); 117*7c478bd9Sstevel@tonic-gate 118*7c478bd9Sstevel@tonic-gate newvers->time_sec = (unsigned int) mt.tv_sec; 119*7c478bd9Sstevel@tonic-gate newvers->time_usec = (unsigned int) mt.tv_usec; 120*7c478bd9Sstevel@tonic-gate newvers->vers_low = 0; 121*7c478bd9Sstevel@tonic-gate newvers->vers_high = (this->vers_high+1); 122*7c478bd9Sstevel@tonic-gate 123*7c478bd9Sstevel@tonic-gate READUNLOCK(this, newvers, "ru vers::nextmajor"); 124*7c478bd9Sstevel@tonic-gate return (newvers); 125*7c478bd9Sstevel@tonic-gate } 126*7c478bd9Sstevel@tonic-gate 127*7c478bd9Sstevel@tonic-gate /* 128*7c478bd9Sstevel@tonic-gate * Predicate indicating whether this vers is earlier than 'other' in 129*7c478bd9Sstevel@tonic-gate * terms of version numbers. 130*7c478bd9Sstevel@tonic-gate */ 131*7c478bd9Sstevel@tonic-gate bool_t 132*7c478bd9Sstevel@tonic-gate vers::earlier_than(vers *other) 133*7c478bd9Sstevel@tonic-gate { 134*7c478bd9Sstevel@tonic-gate int ret, lret; 135*7c478bd9Sstevel@tonic-gate 136*7c478bd9Sstevel@tonic-gate if (other == NULL) { 137*7c478bd9Sstevel@tonic-gate syslog(LOG_ERR, 138*7c478bd9Sstevel@tonic-gate "vers::earlier_than: comparing against null vers"); 139*7c478bd9Sstevel@tonic-gate return (FALSE); 140*7c478bd9Sstevel@tonic-gate } 141*7c478bd9Sstevel@tonic-gate 142*7c478bd9Sstevel@tonic-gate READLOCK(this, FALSE, "r vers::earlier_than"); 143*7c478bd9Sstevel@tonic-gate READLOCKNR(other, lret, "r other vers::earlier_than"); 144*7c478bd9Sstevel@tonic-gate if (lret != 0) { 145*7c478bd9Sstevel@tonic-gate READUNLOCK(this, FALSE, "ru + r other vers::earlier_than"); 146*7c478bd9Sstevel@tonic-gate return (FALSE); 147*7c478bd9Sstevel@tonic-gate } 148*7c478bd9Sstevel@tonic-gate 149*7c478bd9Sstevel@tonic-gate if (other->vers_high > vers_high) ret = TRUE; 150*7c478bd9Sstevel@tonic-gate else if (other->vers_high < vers_high) ret = FALSE; 151*7c478bd9Sstevel@tonic-gate else if (other->vers_low > vers_low) ret = TRUE; 152*7c478bd9Sstevel@tonic-gate else ret = FALSE; 153*7c478bd9Sstevel@tonic-gate 154*7c478bd9Sstevel@tonic-gate READUNLOCKNR(other, lret, "ru other vers::earlier_than"); 155*7c478bd9Sstevel@tonic-gate READUNLOCK(this, ret, ((lret != 0) ? 156*7c478bd9Sstevel@tonic-gate "ru + ru other vers::earlier_than" : 157*7c478bd9Sstevel@tonic-gate "ru vers::earlier_than")); 158*7c478bd9Sstevel@tonic-gate return (ret); 159*7c478bd9Sstevel@tonic-gate } 160*7c478bd9Sstevel@tonic-gate 161*7c478bd9Sstevel@tonic-gate /* Print the value of this 'vers' to specified file. */ 162*7c478bd9Sstevel@tonic-gate void 163*7c478bd9Sstevel@tonic-gate vers::print(FILE* file) 164*7c478bd9Sstevel@tonic-gate { 165*7c478bd9Sstevel@tonic-gate char *thetime; 166*7c478bd9Sstevel@tonic-gate thetime = ctime((long *) (&(time_sec))); 167*7c478bd9Sstevel@tonic-gate thetime[strlen(thetime)-1] = 0; 168*7c478bd9Sstevel@tonic-gate 169*7c478bd9Sstevel@tonic-gate READLOCKV(this, "r vers::print"); 170*7c478bd9Sstevel@tonic-gate fprintf(file, "version=%u.%u %s:%u", 171*7c478bd9Sstevel@tonic-gate vers_high, 172*7c478bd9Sstevel@tonic-gate vers_low, 173*7c478bd9Sstevel@tonic-gate /* time_sec, */ 174*7c478bd9Sstevel@tonic-gate thetime, 175*7c478bd9Sstevel@tonic-gate time_usec); 176*7c478bd9Sstevel@tonic-gate READUNLOCKV(this, "ru vers::print"); 177*7c478bd9Sstevel@tonic-gate } 178*7c478bd9Sstevel@tonic-gate 179*7c478bd9Sstevel@tonic-gate void 180*7c478bd9Sstevel@tonic-gate vers::zero() { 181*7c478bd9Sstevel@tonic-gate WRITELOCKV(this, "r vers::zero"); 182*7c478bd9Sstevel@tonic-gate vers_high = vers_low = time_sec = time_usec = 0; 183*7c478bd9Sstevel@tonic-gate WRITEUNLOCKV(this, "ru vers::zero"); 184*7c478bd9Sstevel@tonic-gate } 185*7c478bd9Sstevel@tonic-gate 186*7c478bd9Sstevel@tonic-gate bool_t 187*7c478bd9Sstevel@tonic-gate vers::equal( vers *other) { 188*7c478bd9Sstevel@tonic-gate READLOCK(this, FALSE, "r vers::equal"); 189*7c478bd9Sstevel@tonic-gate bool_t ret = other != NULL && 190*7c478bd9Sstevel@tonic-gate vers_high == other->vers_high && 191*7c478bd9Sstevel@tonic-gate vers_low == other->vers_low && 192*7c478bd9Sstevel@tonic-gate time_sec == other->time_sec && 193*7c478bd9Sstevel@tonic-gate time_usec == other->time_usec; 194*7c478bd9Sstevel@tonic-gate READUNLOCK(this, ret, "ru vers::equal"); 195*7c478bd9Sstevel@tonic-gate return (ret); 196*7c478bd9Sstevel@tonic-gate }; 197