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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
49QT_BEGIN_NAMESPACE
50
51using namespace QV4;
52
53class StaticUnitCache
54{
55public:
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
68private:
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
77QHash<QString, CompilationUnitMapper> StaticUnitCache::s_staticUnits;
78QMutex StaticUnitCache::s_mutex;
79
80CompilationUnitMapper::~CompilationUnitMapper()
81{
82 close();
83}
84
85CompiledData::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
108QT_END_NAMESPACE
109

source code of qtdeclarative/src/qml/jsruntime/qv4compilationunitmapper.cpp