1/*
2 * Copyright (C) 2012 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#ifndef PlatformInstrumentation_h
32#define PlatformInstrumentation_h
33
34#include <wtf/MainThread.h>
35#include <wtf/text/WTFString.h>
36
37namespace WebCore {
38
39class PlatformInstrumentationClient {
40public:
41    virtual ~PlatformInstrumentationClient();
42
43    virtual void willDecodeImage(const String& imageType) = 0;
44    virtual void didDecodeImage() = 0;
45    virtual void willResizeImage(bool shouldCache) = 0;
46    virtual void didResizeImage() = 0;
47};
48
49class PlatformInstrumentation {
50public:
51    static const char ImageDecodeEvent[];
52    static const char ImageResizeEvent[];
53
54    static const char ImageTypeArgument[];
55    static const char CachedArgument[];
56
57    static void setClient(PlatformInstrumentationClient*);
58    static bool hasClient() { return m_client; }
59
60    static void willDecodeImage(const String& imageType);
61    static void didDecodeImage();
62    static void willResizeImage(bool shouldCache);
63    static void didResizeImage();
64
65private:
66    static const char CategoryName[];
67
68    static PlatformInstrumentationClient* m_client;
69};
70
71#define FAST_RETURN_IF_NO_CLIENT_OR_NOT_MAIN_THREAD() if (!m_client || !isMainThread()) return;
72
73inline void PlatformInstrumentation::willDecodeImage(const String& imageType)
74{
75    FAST_RETURN_IF_NO_CLIENT_OR_NOT_MAIN_THREAD();
76    m_client->willDecodeImage(imageType);
77}
78
79inline void PlatformInstrumentation::didDecodeImage()
80{
81    FAST_RETURN_IF_NO_CLIENT_OR_NOT_MAIN_THREAD();
82    m_client->didDecodeImage();
83}
84
85inline void PlatformInstrumentation::willResizeImage(bool shouldCache)
86{
87    FAST_RETURN_IF_NO_CLIENT_OR_NOT_MAIN_THREAD();
88    m_client->willResizeImage(shouldCache);
89}
90
91inline void PlatformInstrumentation::didResizeImage()
92{
93    FAST_RETURN_IF_NO_CLIENT_OR_NOT_MAIN_THREAD();
94    m_client->didResizeImage();
95}
96
97} // namespace WebCore
98
99#endif // PlatformInstrumentation_h
100