1/*
2 * Copyright (C) 2016 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 ENABLE(JIT)
29
30#include <wtf/AutomaticThread.h>
31#include <wtf/FastMalloc.h>
32#include <wtf/HashSet.h>
33#include <wtf/Lock.h>
34#include <wtf/Noncopyable.h>
35#include <wtf/RefPtr.h>
36#include <wtf/Vector.h>
37
38namespace JSC {
39
40class CodeBlock;
41class VM;
42
43class JITWorklist {
44 WTF_MAKE_NONCOPYABLE(JITWorklist);
45 WTF_MAKE_FAST_ALLOCATED;
46
47 class Plan;
48 typedef Vector<RefPtr<Plan>, 32> Plans;
49
50public:
51 ~JITWorklist();
52
53 bool completeAllForVM(VM&); // Return true if any JIT work happened.
54 void poll(VM&);
55
56 void compileLater(CodeBlock*, unsigned loopOSREntryBytecodeOffset = 0);
57
58 void compileNow(CodeBlock*, unsigned loopOSREntryBytecodeOffset = 0);
59
60 static JITWorklist& ensureGlobalWorklist();
61 static JITWorklist* existingGlobalWorklistOrNull();
62
63private:
64 JITWorklist();
65
66 class Thread;
67 friend class Thread;
68
69 void finalizePlans(Plans&);
70
71 Plans m_queue;
72 Plans m_plans;
73 HashSet<CodeBlock*> m_planned;
74
75 Box<Lock> m_lock;
76 Ref<AutomaticThreadCondition> m_condition; // We use One True Condition for everything because that's easier.
77 RefPtr<AutomaticThread> m_thread;
78
79 unsigned m_numAvailableThreads { 0 };
80};
81
82} // namespace JSC
83
84#endif // ENABLE(JIT)
85