| | 1 | /* |
| | 2 | * Copyright (c) 1999 Apple Computer, Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 6 | * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved. |
| | 7 | * |
| | 8 | * This file contains Original Code and/or Modifications of Original Code |
| | 9 | * as defined in and that are subject to the Apple Public Source License |
| | 10 | * Version 2.0 (the 'License'). You may not use this file except in |
| | 11 | * compliance with the License. Please obtain a copy of the License at |
| | 12 | * http://www.opensource.apple.com/apsl/ and read it before using this |
| | 13 | * file. |
| | 14 | * |
| | 15 | * The Original Code and all software distributed under the License are |
| | 16 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| | 17 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 18 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 19 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| | 20 | * Please see the License for the specific language governing rights and |
| | 21 | * limitations under the License. |
| | 22 | * |
| | 23 | * @APPLE_LICENSE_HEADER_END@ |
| | 24 | */ |
| | 25 | #include "SYS.h" |
| | 26 | .data |
| | 27 | EXPORT(__current_pid) |
| | 28 | .long 0 |
| | 29 | |
| | 30 | TEXT |
| | 31 | LEAF(_getpid) |
| | 32 | #if defined(__DYNAMIC__) |
| | 33 | mflr r0 |
| | 34 | bcl 20,31,1f |
| | 35 | 1: |
| | 36 | mflr r5 |
| | 37 | mtlr r0 |
| | 38 | addis r5, r5, ha16(__current_pid - 1b) |
| | 39 | addi r5, r5, lo16(__current_pid - 1b) |
| | 40 | #else |
| | 41 | lis r5,ha16(__current_pid) |
| | 42 | ori r5,r5,lo16(__current_pid) |
| | 43 | #endif |
| | 44 | lwz r3,0(r5) // get the cached pid |
| | 45 | cmpwi r3,0 // if positive, |
| | 46 | bgtlr+ // return it |
| | 47 | |
| | 48 | SYSCALL_NONAME(getpid, 0) |
| | 49 | |
| | 50 | lwarx r4,0,r5 // see if we can cache it |
| | 51 | cmpwi r4,0 // we cant if there are any |
| | 52 | bltlr- // vforks in progress |
| | 53 | |
| | 54 | stwcx. r3,0,r5 // ignore cache conflicts |
| | 55 | blr |
| | 56 | END(_getpid) |
projects / apple / libc.git / blame_incremental