1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
/*
* Copyright (C) 2012 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _BIONIC_THREAD_LOCAL_BUFFER_H_included
#define _BIONIC_THREAD_LOCAL_BUFFER_H_included
#include <malloc.h>
#include <pthread.h>
// libstdc++ currently contains __cxa_guard_acquire and __cxa_guard_release,
// so we make do with macros instead of a C++ class.
// TODO: move __cxa_guard_acquire and __cxa_guard_release into libc.
#define GLOBAL_INIT_THREAD_LOCAL_BUFFER(name) \
static pthread_once_t name ## _once; \
static pthread_key_t name ## _key; \
static void name ## _key_destroy(void* buffer) { \
free(buffer); \
} \
static void name ## _key_init() { \
pthread_key_create(&name ## _key, name ## _key_destroy); \
}
// Leaves "name_buffer" and "name_byte_count" defined and initialized.
#define LOCAL_INIT_THREAD_LOCAL_BUFFER(type, name, byte_count) \
pthread_once(&name ## _once, name ## _key_init); \
type name ## _buffer = reinterpret_cast<type>(pthread_getspecific(name ## _key)); \
if (name ## _buffer == NULL) { \
name ## _buffer = reinterpret_cast<type>(malloc(byte_count)); \
pthread_setspecific(name ## _key, name ## _buffer); \
} \
const size_t name ## _buffer_size = byte_count
#endif // _BIONIC_THREAD_LOCAL_BUFFER_H_included
|
