projects / apple / libc.git / blame
| Commit | Line | Data |
|---|---|---|
| e9ce8d39 A |
1 | /* |
| 2 | * Copyright (c) 1999 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 4 | * @APPLE_LICENSE_HEADER_START@ | |
| 5 | * | |
| 6 | * The contents of this file constitute Original Code as defined in and | |
| 7 | * are subject to the Apple Public Source License Version 1.1 (the | |
| 8 | * "License"). You may not use this file except in compliance with the | |
| 9 | * License. Please obtain a copy of the License at | |
| 10 | * http://www.apple.com/publicsource and read it before using this file. | |
| 11 | * | |
| 12 | * This Original Code and all software distributed under the License are | |
| 13 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, | |
| 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 16 | * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the | |
| 17 | * License for the specific language governing rights and limitations | |
| 18 | * under the License. | |
| 19 | * | |
| 20 | * @APPLE_LICENSE_HEADER_END@ | |
| 21 | */ | |
| 22 | #include "SYS.h" | |
| 5b2abdfb A |
23 | .data |
| 24 | EXPORT(__current_pid) | |
| 25 | .long 0 | |
| e9ce8d39 | 26 | |
| 5b2abdfb A |
27 | TEXT |
| 28 | LEAF(_getpid) | |
| 29 | #if defined(__DYNAMIC__) | |
| 30 | mflr r0 | |
| 31 | bcl 20,31,1f | |
| 32 | 1: | |
| 33 | mflr r5 | |
| 34 | mtlr r0 | |
| 35 | addis r5, r5, ha16(__current_pid - 1b) | |
| 36 | addi r5, r5, lo16(__current_pid - 1b) | |
| 37 | #else | |
| 38 | lis r5,ha16(__current_pid) | |
| 39 | ori r5,r5,lo16(__current_pid) | |
| 40 | #endif | |
| 41 | lwz r3,0(r5) // get the cached pid | |
| 42 | cmpwi r3,0 // if positive, | |
| 43 | bgtlr+ // return it | |
| 44 | ||
| 45 | SYSCALL_NONAME(getpid, 0) | |
| e9ce8d39 | 46 | |
| 5b2abdfb A |
47 | lwarx r4,0,r5 // see if we can cache it |
| 48 | cmpwi r4,0 // we cant if there are any | |
| 49 | bltlr- // vforks in progress | |
| e9ce8d39 | 50 | |
| 5b2abdfb A |
51 | stwcx. r3,0,r5 // ignore cache conflicts |
| 52 | blr | |
| 53 | END(_getpid) |