1/*
2 * Copyright (C) 2010 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 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of Apple Inc. ("Apple") nor the names of
14 * its contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#ifndef GCActivityCallback_h
30#define GCActivityCallback_h
31
32#include "HeapTimer.h"
33#include <wtf/RefPtr.h>
34
35#if USE(CF)
36#include <CoreFoundation/CoreFoundation.h>
37#endif
38
39namespace JSC {
40
41class FullGCActivityCallback;
42class Heap;
43
44class JS_EXPORT_PRIVATE GCActivityCallback : public HeapTimer, public ThreadSafeRefCounted<GCActivityCallback> {
45 WTF_MAKE_FAST_ALLOCATED;
46public:
47 static RefPtr<FullGCActivityCallback> createFullTimer(Heap*);
48 static RefPtr<GCActivityCallback> createEdenTimer(Heap*);
49
50 GCActivityCallback(Heap*);
51
52 virtual void doWork() override;
53
54 virtual void doCollection() = 0;
55
56 virtual void didAllocate(size_t);
57 virtual void willCollect();
58 virtual void cancel();
59 bool isEnabled() const { return m_enabled; }
60 void setEnabled(bool enabled) { m_enabled = enabled; }
61
62 static bool s_shouldCreateGCTimer;
63
64#if USE(CF) || PLATFORM(EFL)
65 double nextFireTime() const { return m_nextFireTime; }
66#endif
67
68protected:
69 virtual double lastGCLength() = 0;
70 virtual double gcTimeSlice(size_t bytes) = 0;
71 virtual double deathRate() = 0;
72
73#if USE(CF)
74 GCActivityCallback(VM* vm, CFRunLoopRef runLoop)
75 : HeapTimer(vm, runLoop)
76 , m_enabled(true)
77 , m_delay(s_decade)
78 {
79 }
80#elif PLATFORM(EFL)
81 static constexpr double s_hour = 3600;
82 GCActivityCallback(VM* vm, bool flag)
83 : HeapTimer(vm)
84 , m_enabled(flag)
85 , m_delay(s_hour)
86 {
87 }
88#elif PLATFORM(QT)
89 static constexpr double s_hour = 3600;
90 GCActivityCallback(VM* vm)
91 : HeapTimer(vm)
92 , m_enabled(true)
93 , m_delay(s_hour)
94 {
95 }
96#elif USE(GLIB)
97 GCActivityCallback(VM* vm)
98 : HeapTimer(vm)
99 , m_enabled(true)
100 , m_delay(-1)
101 {
102 }
103#else
104 GCActivityCallback(VM* vm)
105 : HeapTimer(vm)
106 , m_enabled(true)
107 {
108 }
109#endif
110
111 bool m_enabled;
112
113#if USE(CF)
114protected:
115 GCActivityCallback(Heap*, CFRunLoopRef);
116#endif
117#if USE(CF) || USE(GLIB) || PLATFORM(QT)
118protected:
119 void cancelTimer();
120 void scheduleTimer(double);
121
122private:
123 double m_delay;
124 double m_nextFireTime { 0 };
125#endif
126};
127
128} // namespace JSC
129
130#endif
131