1/*
2 * Copyright (C) 2017-2018 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#if HAVE(FAST_TLS)
29
30#include <pthread.h>
31#include <System/pthread_machdep.h>
32#include <wtf/Platform.h>
33
34namespace WTF {
35
36// __PTK_FRAMEWORK_JAVASCRIPTCORE_KEY0-1 is taken by bmalloc, so WTF's KEY0 maps to the
37// system's KEY2.
38#define WTF_FAST_TLS_KEY0 __PTK_FRAMEWORK_JAVASCRIPTCORE_KEY2
39#define WTF_FAST_TLS_KEY1 __PTK_FRAMEWORK_JAVASCRIPTCORE_KEY3
40#define WTF_FAST_TLS_KEY2 __PTK_FRAMEWORK_JAVASCRIPTCORE_KEY4
41
42// NOTE: We should manage our use of these keys here. If you want to use a key for something,
43// put a #define in here to give your key a symbolic name. This ensures that we don't
44// accidentally use the same key for more than one thing.
45
46#define WTF_THREAD_DATA_KEY WTF_FAST_TLS_KEY0
47#define WTF_WASM_CONTEXT_KEY WTF_FAST_TLS_KEY1
48#define WTF_TESTING_KEY WTF_WASM_CONTEXT_KEY // So far, this key is only used in places that don't do WebAssembly, so it's OK that they share the same key.
49#define WTF_GC_TLC_KEY WTF_FAST_TLS_KEY2
50
51#if ENABLE(FAST_TLS_JIT)
52inline unsigned fastTLSOffsetForKey(unsigned long slot)
53{
54 return slot * sizeof(void*);
55}
56#endif
57
58} // namespace WTF
59
60#if ENABLE(FAST_TLS_JIT)
61using WTF::fastTLSOffsetForKey;
62#endif
63
64#endif // HAVE(FAST_TLS)
65
66