| Elliott Hughes | 5d9a7ba | 2014-05-30 19:00:03 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2014 The Android Open Source Project |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * * Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * * Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in |
| 12 | * the documentation and/or other materials provided with the |
| 13 | * distribution. |
| 14 | * |
| 15 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 16 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 17 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 18 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 19 | * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 20 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| 21 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| 22 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| 23 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 24 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| 25 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 26 | * SUCH DAMAGE. |
| 27 | */ |
| 28 | |
| 29 | #include<unistd.h> |
| Elliott Hughes | d7c5262 | 2017-06-20 14:26:56 -0700 | [diff] [blame] | 30 | #include<sys/syscall.h> |
| Elliott Hughes | 5d9a7ba | 2014-05-30 19:00:03 -0700 | [diff] [blame] | 31 | |
| 32 | #include"pthread_internal.h" |
| 33 | |
| 34 | pid_t gettid(){ |
| Robert Sesek | a4edf7a | 2016-10-25 10:29:02 -0400 | [diff] [blame] | 35 | pthread_internal_t* self= __get_thread(); |
| 36 | if(__predict_true(self)){ |
| 37 | pid_t tid= self->tid; |
| 38 | if(__predict_true(tid!=-1)){ |
| 39 | return tid; |
| 40 | } |
| 41 | self->tid= syscall(__NR_gettid); |
| 42 | return self->tid; |
| 43 | } |
| 44 | return syscall(__NR_gettid); |
| Elliott Hughes | 5d9a7ba | 2014-05-30 19:00:03 -0700 | [diff] [blame] | 45 | } |
