| Bruce Beare | 3964084 | 2011-06-20 10:29:50 -0700 | [diff] [blame] | 1 | /* |
| Nick Kralevich | 9d40326 | 2012-05-31 11:40:10 -0700 | [diff] [blame^] | 2 | * Copyright (C) 2012 The Android Open Source Project |
| Bruce Beare | 3964084 | 2011-06-20 10:29:50 -0700 | [diff] [blame] | 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 | |
| Nick Kralevich | 9d40326 | 2012-05-31 11:40:10 -0700 | [diff] [blame^] | 29 | /* CRT_LEGACY_WORKAROUND should only be defined when building |
| 30 | * this file as part of the platform's C library. |
| 31 | * |
| 32 | * The C library already defines a function named 'atexit()' |
| 33 | * for backwards compatibility with older NDK-generated binaries. |
| 34 | * |
| 35 | * For newer ones, 'atexit' is actually embedded in the C |
| 36 | * runtime objects that are linked into the final ELF |
| 37 | * binary (shared library or executable), and will call |
| 38 | * __cxa_atexit() in order to un-register any atexit() |
| 39 | * handler when a library is unloaded. |
| 40 | * |
| 41 | * This function must be global *and* hidden. Only the |
| 42 | * code inside the same ELF binary should be able to access it. |
| 43 | */ |
| 44 | |
| Bruce Beare | 3964084 | 2011-06-20 10:29:50 -0700 | [diff] [blame] | 45 | #ifndef CRT_LEGACY_WORKAROUND |
| Nick Kralevich | 9d40326 | 2012-05-31 11:40:10 -0700 | [diff] [blame^] | 46 | extern void *__dso_handle; |
| 47 | |
| 48 | __attribute__ ((visibility ("hidden"))) |
| 49 | int atexit(void (*func)(void)) |
| 50 | { |
| 51 | return (__cxa_atexit((void (*)(void *))func, (void *)0, &__dso_handle)); |
| 52 | } |
| Bruce Beare | 3964084 | 2011-06-20 10:29:50 -0700 | [diff] [blame] | 53 | #endif |