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1 /* | 1 /* |
2 * Copyright (C) 2013 Apple Inc. All rights reserved. | 2 * Copyright (C) 2013 Apple 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 | 5 * modification, are permitted provided that the following conditions |
6 * are met: | 6 * are met: |
7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
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172 } | 172 } |
173 | 173 |
174 typedef HashMap<DatabaseGuid, String> GuidVersionMap; | 174 typedef HashMap<DatabaseGuid, String> GuidVersionMap; |
175 static GuidVersionMap& GuidToVersionMap() { | 175 static GuidVersionMap& GuidToVersionMap() { |
176 DEFINE_STATIC_LOCAL_WITH_LOCK(GuidVersionMap, map, ()); | 176 DEFINE_STATIC_LOCAL_WITH_LOCK(GuidVersionMap, map, ()); |
177 return map; | 177 return map; |
178 } | 178 } |
179 | 179 |
180 // NOTE: Caller must lock guidMutex(). | 180 // NOTE: Caller must lock guidMutex(). |
181 static inline void UpdateGuidVersionMap(DatabaseGuid guid, String new_version) { | 181 static inline void UpdateGuidVersionMap(DatabaseGuid guid, String new_version) { |
182 // Ensure the the mutex is locked. | 182 // Ensure the the mutex is locked. |
183 #if DCHECK_IS_ON() | 183 #if DCHECK_IS_ON() |
184 DCHECK(GuidMutex().Locked()); | 184 DCHECK(GuidMutex().Locked()); |
185 #endif | 185 #endif |
186 | 186 |
187 // Note: It is not safe to put an empty string into the guidToVersionMap() | 187 // Note: It is not safe to put an empty string into the guidToVersionMap() |
188 // map. That's because the map is cross-thread, but empty strings are | 188 // map. That's because the map is cross-thread, but empty strings are |
189 // per-thread. The copy() function makes a version of the string you can | 189 // per-thread. The copy() function makes a version of the string you can |
190 // use on the current thread, but we need a string we can keep in a | 190 // use on the current thread, but we need a string we can keep in a |
191 // cross-thread data structure. | 191 // cross-thread data structure. |
192 // FIXME: This is a quite-awkward restriction to have to program with. | 192 // FIXME: This is a quite-awkward restriction to have to program with. |
193 | 193 |
194 // Map null string to empty string (see comment above). | 194 // Map null string to empty string (see comment above). |
195 GuidToVersionMap().Set( | 195 GuidToVersionMap().Set( |
196 guid, new_version.IsEmpty() ? String() : new_version.IsolatedCopy()); | 196 guid, new_version.IsEmpty() ? String() : new_version.IsolatedCopy()); |
197 } | 197 } |
198 | 198 |
199 static HashCountedSet<DatabaseGuid>& GuidCount() { | 199 static HashCountedSet<DatabaseGuid>& GuidCount() { |
200 DEFINE_STATIC_LOCAL_WITH_LOCK(HashCountedSet<DatabaseGuid>, guid_count, ()); | 200 DEFINE_STATIC_LOCAL_WITH_LOCK(HashCountedSet<DatabaseGuid>, guid_count, ()); |
201 return guid_count; | 201 return guid_count; |
202 } | 202 } |
203 | 203 |
204 static DatabaseGuid GuidForOriginAndName(const String& origin, | 204 static DatabaseGuid GuidForOriginAndName(const String& origin, |
205 const String& name) { | 205 const String& name) { |
206 // Ensure the the mutex is locked. | 206 // Ensure the the mutex is locked. |
207 #if DCHECK_IS_ON() | 207 #if DCHECK_IS_ON() |
208 DCHECK(GuidMutex().Locked()); | 208 DCHECK(GuidMutex().Locked()); |
209 #endif | 209 #endif |
210 | 210 |
211 String string_id = origin + "/" + name; | 211 String string_id = origin + "/" + name; |
212 | 212 |
213 typedef HashMap<String, int> IDGuidMap; | 213 typedef HashMap<String, int> IDGuidMap; |
214 DEFINE_STATIC_LOCAL_WITH_LOCK(IDGuidMap, string_identifier_to_guid_map, ()); | 214 DEFINE_STATIC_LOCAL_WITH_LOCK(IDGuidMap, string_identifier_to_guid_map, ()); |
215 DatabaseGuid guid = string_identifier_to_guid_map.at(string_id); | 215 DatabaseGuid guid = string_identifier_to_guid_map.at(string_id); |
216 if (!guid) { | 216 if (!guid) { |
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992 | 992 |
993 bool Database::Opened() { | 993 bool Database::Opened() { |
994 return static_cast<bool>(AcquireLoad(&opened_)); | 994 return static_cast<bool>(AcquireLoad(&opened_)); |
995 } | 995 } |
996 | 996 |
997 WebTaskRunner* Database::GetDatabaseTaskRunner() const { | 997 WebTaskRunner* Database::GetDatabaseTaskRunner() const { |
998 return database_task_runner_.Get(); | 998 return database_task_runner_.Get(); |
999 } | 999 } |
1000 | 1000 |
1001 } // namespace blink | 1001 } // namespace blink |
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