| Irina Tirdea | b5f053b | 2012-09-08 09:17:54 +0300 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012 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 | #ifndef _BIONIC_THREAD_LOCAL_BUFFER_H_included |
| 30 | #define _BIONIC_THREAD_LOCAL_BUFFER_H_included |
| 31 | |
| 32 | #include <malloc.h> |
| 33 | #include <pthread.h> |
| 34 | |
| 35 | // libstdc++ currently contains __cxa_guard_acquire and __cxa_guard_release, |
| 36 | // so we make do with macros instead of a C++ class. |
| 37 | // TODO: move __cxa_guard_acquire and __cxa_guard_release into libc. |
| 38 | |
| 39 | #define GLOBAL_INIT_THREAD_LOCAL_BUFFER(name) \ |
| 40 | static pthread_once_t name ## _once; \ |
| 41 | static pthread_key_t name ## _key; \ |
| 42 | static void name ## _key_destroy(void* buffer) { \ |
| 43 | free(buffer); \ |
| 44 | } \ |
| 45 | static void name ## _key_init() { \ |
| 46 | pthread_key_create(&name ## _key, name ## _key_destroy); \ |
| 47 | } |
| 48 | |
| 49 | // Leaves "name_buffer" and "name_byte_count" defined and initialized. |
| 50 | #define LOCAL_INIT_THREAD_LOCAL_BUFFER(type, name, byte_count) \ |
| 51 | pthread_once(&name ## _once, name ## _key_init); \ |
| 52 | type name ## _buffer = reinterpret_cast<type>(pthread_getspecific(name ## _key)); \ |
| 53 | if (name ## _buffer == NULL) { \ |
| 54 | name ## _buffer = reinterpret_cast<type>(malloc(byte_count)); \ |
| 55 | pthread_setspecific(name ## _key, name ## _buffer); \ |
| 56 | } \ |
| 57 | const size_t name ## _buffer_size = byte_count |
| 58 | |
| 59 | #endif // _BIONIC_THREAD_LOCAL_BUFFER_H_included |