/* * Copyright (c) 1999 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This Original Code and all software distributed under the License are * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ */ #include "SYS.h" .data EXPORT(__current_pid) .long 0 TEXT LEAF(_getpid) #if defined(__DYNAMIC__) mflr r0 bcl 20,31,1f 1: mflr r5 mtlr r0 addis r5, r5, ha16(__current_pid - 1b) addi r5, r5, lo16(__current_pid - 1b) #else lis r5,ha16(__current_pid) ori r5,r5,lo16(__current_pid) #endif lwz r3,0(r5) // get the cached pid cmpwi r3,0 // if positive, bgtlr+ // return it SYSCALL_NONAME(getpid, 0) lwarx r4,0,r5 // see if we can cache it cmpwi r4,0 // we cant if there are any bltlr- // vforks in progress stwcx. r3,0,r5 // ignore cache conflicts blr END(_getpid)