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39 | |
40 | #include "qv4compilationunitmapper_p.h" |
41 | |
42 | #include <private/qv4compileddata_p.h> |
43 | #include <private/qv4executablecompilationunit_p.h> |
44 | |
45 | #include <QtCore/qdatetime.h> |
46 | #include <QtCore/qmutex.h> |
47 | #include <QtCore/qhash.h> |
48 | |
49 | QT_BEGIN_NAMESPACE |
50 | |
51 | using namespace QV4; |
52 | |
53 | class StaticUnitCache |
54 | { |
55 | public: |
56 | StaticUnitCache() : m_lock(&s_mutex) {} |
57 | |
58 | CompilationUnitMapper get(const QString &file) |
59 | { |
60 | const auto it = s_staticUnits.constFind(akey: file); |
61 | return it == s_staticUnits.constEnd() ? CompilationUnitMapper() : *it; |
62 | } |
63 | |
64 | void set(const QString &file, const CompilationUnitMapper &staticUnit) { |
65 | s_staticUnits.insert(akey: file, avalue: staticUnit); |
66 | } |
67 | |
68 | private: |
69 | QMutexLocker m_lock; |
70 | |
71 | static QMutex s_mutex; |
72 | |
73 | // We can copy the mappers around because they're all static, that is the dtors are noops. |
74 | static QHash<QString, CompilationUnitMapper> s_staticUnits; |
75 | }; |
76 | |
77 | QHash<QString, CompilationUnitMapper> StaticUnitCache::s_staticUnits; |
78 | QMutex StaticUnitCache::s_mutex; |
79 | |
80 | CompilationUnitMapper::~CompilationUnitMapper() |
81 | { |
82 | close(); |
83 | } |
84 | |
85 | CompiledData::Unit *CompilationUnitMapper::get( |
86 | const QString &cacheFilePath, const QDateTime &sourceTimeStamp, QString *errorString) |
87 | { |
88 | StaticUnitCache cache; |
89 | |
90 | CompilationUnitMapper mapper = cache.get(file: cacheFilePath); |
91 | if (mapper.dataPtr) { |
92 | auto *unit = reinterpret_cast<CompiledData::Unit *>(mapper.dataPtr); |
93 | if (ExecutableCompilationUnit::verifyHeader(unit, expectedSourceTimeStamp: sourceTimeStamp, errorString)) { |
94 | *this = mapper; |
95 | return unit; |
96 | } |
97 | |
98 | return nullptr; |
99 | } |
100 | |
101 | CompiledData::Unit *data = open(cacheFilePath, sourceTimeStamp, errorString); |
102 | if (data && (data->flags & CompiledData::Unit::StaticData)) |
103 | cache.set(file: cacheFilePath, staticUnit: *this); |
104 | |
105 | return data; |
106 | } |
107 | |
108 | QT_END_NAMESPACE |
109 | |