1 /*
2 * Copyright (C) 2013 Google 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 are
6 * met:
7 *
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
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 * * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "config.h"
32 #include "WTF.h"
33
34 #include "wtf/QuantizedAllocation.h"
35
36 #ifndef NDEBUG
37 #include "wtf/MainThread.h"
38 #endif
39
40 namespace WTF {
41
42 extern void initializeThreading();
43
44 bool s_initialized;
45 bool s_shutdown;
46 bool Partitions::s_initialized;
47 PartitionAllocator<4096> Partitions::m_bufferAllocator;
48
initialize(TimeFunction currentTimeFunction,TimeFunction monotonicallyIncreasingTimeFunction)49 void initialize(TimeFunction currentTimeFunction, TimeFunction monotonicallyIncreasingTimeFunction)
50 {
51 // WTF, and Blink in general, cannot handle being re-initialized, even if shutdown first.
52 // Make that explicit here.
53 ASSERT(!s_initialized);
54 ASSERT(!s_shutdown);
55 s_initialized = true;
56 Partitions::initialize();
57 setCurrentTimeFunction(currentTimeFunction);
58 setMonotonicallyIncreasingTimeFunction(monotonicallyIncreasingTimeFunction);
59 initializeThreading();
60 }
61
shutdown()62 void shutdown()
63 {
64 ASSERT(s_initialized);
65 ASSERT(!s_shutdown);
66 s_shutdown = true;
67 Partitions::shutdown();
68 }
69
isShutdown()70 bool isShutdown()
71 {
72 return s_shutdown;
73 }
74
initialize()75 void Partitions::initialize()
76 {
77 static int lock = 0;
78 // Guard against two threads hitting here in parallel.
79 spinLockLock(&lock);
80 if (s_initialized)
81 return;
82 s_initialized = true;
83 spinLockUnlock(&lock);
84 QuantizedAllocation::init();
85 m_bufferAllocator.init();
86 }
87
shutdown()88 void Partitions::shutdown()
89 {
90 m_bufferAllocator.shutdown();
91 }
92
93 } // namespace WTF
94