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1 /* | 1 /* |
2 * Copyright (C) 2013 Google Inc. All rights reserved. | 2 * Copyright (C) 2013 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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117 | 117 |
118 bool FontDataCache::purgeLeastRecentlyUsed(int count) | 118 bool FontDataCache::purgeLeastRecentlyUsed(int count) |
119 { | 119 { |
120 static bool isPurging; // Guard against reentry when e.g. a deleted FontData
releases its small caps FontData. | 120 static bool isPurging; // Guard against reentry when e.g. a deleted FontData
releases its small caps FontData. |
121 if (isPurging) | 121 if (isPurging) |
122 return false; | 122 return false; |
123 | 123 |
124 isPurging = true; | 124 isPurging = true; |
125 | 125 |
126 Vector<RefPtr<SimpleFontData>, 20> fontDataToDelete; | 126 Vector<RefPtr<SimpleFontData>, 20> fontDataToDelete; |
127 ListHashSet<RefPtr<SimpleFontData> >::iterator end = m_inactiveFontData.end(
); | 127 ListHashSet<RefPtr<SimpleFontData>>::iterator end = m_inactiveFontData.end()
; |
128 ListHashSet<RefPtr<SimpleFontData> >::iterator it = m_inactiveFontData.begin
(); | 128 ListHashSet<RefPtr<SimpleFontData>>::iterator it = m_inactiveFontData.begin(
); |
129 for (int i = 0; i < count && it != end; ++it, ++i) { | 129 for (int i = 0; i < count && it != end; ++it, ++i) { |
130 RefPtr<SimpleFontData>& fontData = *it.get(); | 130 RefPtr<SimpleFontData>& fontData = *it.get(); |
131 m_cache.remove(fontData->platformData()); | 131 m_cache.remove(fontData->platformData()); |
132 // We should not delete SimpleFontData here because deletion can modify
m_inactiveFontData. See http://trac.webkit.org/changeset/44011 | 132 // We should not delete SimpleFontData here because deletion can modify
m_inactiveFontData. See http://trac.webkit.org/changeset/44011 |
133 fontDataToDelete.append(fontData); | 133 fontDataToDelete.append(fontData); |
134 } | 134 } |
135 | 135 |
136 if (it == end) { | 136 if (it == end) { |
137 // Removed everything | 137 // Removed everything |
138 m_inactiveFontData.clear(); | 138 m_inactiveFontData.clear(); |
139 } else { | 139 } else { |
140 for (int i = 0; i < count; ++i) | 140 for (int i = 0; i < count; ++i) |
141 m_inactiveFontData.remove(m_inactiveFontData.begin()); | 141 m_inactiveFontData.remove(m_inactiveFontData.begin()); |
142 } | 142 } |
143 | 143 |
144 bool didWork = fontDataToDelete.size(); | 144 bool didWork = fontDataToDelete.size(); |
145 | 145 |
146 fontDataToDelete.clear(); | 146 fontDataToDelete.clear(); |
147 | 147 |
148 isPurging = false; | 148 isPurging = false; |
149 | 149 |
150 return didWork; | 150 return didWork; |
151 } | 151 } |
152 | 152 |
153 } // namespace blink | 153 } // namespace blink |
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