thirdparty/scummvm
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GUI: Improve thread-safety for icons set access

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The previous commit was not sufficient as getIconsSet() returns a
reference to the SearchSet and it could then be used after the
mutex had been unlocked and while it was being modified in
initIconsSet() called in another thread.
This commit is contained in:
Thierry Crozat 2022-06-29 19:27:27 +01:00 • committed by Eugene Sandulenko
parent 9dd4da4e4d
commit f4bbbe5786
No known key found for this signature in database
GPG key ID: 014D387312D34F08
3 changed files with 10 additions and 4 deletions
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7
gui/gui-manager.h
View file

@ -96,10 +96,9 @@ public:
ThemeEval *xmlEval() { return _theme->getEvaluator(); }
Common::SearchSet &getIconsSet() {
Common::StackLock lock(_iconsMutex);
return _iconsSet;
}
void lockIconsSet() { _iconsMutex.lock(); }
void unlockIconsSet() { _iconsMutex.unlock(); }
Common::SearchSet &getIconsSet() { return _iconsSet; }
int16 getGUIWidth() const { return _baseWidth; }
int16 getGUIHeight() const { return _baseHeight; }

2
gui/launcher.cpp
View file

@ -183,6 +183,7 @@ LauncherDialog::LauncherDialog(const Common::String &dialogName, LauncherChooser
Common::ArchiveMemberList mdFiles;
g_gui.lockIconsSet();
g_gui.getIconsSet().listMatchingMembers(mdFiles, "*.xml");
for (Common::ArchiveMemberList::iterator md = mdFiles.begin(); md != mdFiles.end(); ++md) {
if (_metadataParser.loadStream((*md)->createReadStream()) == false) {
@ -194,6 +195,7 @@ LauncherDialog::LauncherDialog(const Common::String &dialogName, LauncherChooser
}
_metadataParser.close();
}
g_gui.unlockIconsSet();
}
LauncherDialog::~LauncherDialog() {

5
gui/widgets/grid.cpp
View file

@ -291,9 +291,11 @@ Graphics::ManagedSurface *loadSurfaceFromFile(const Common::String &name, int re
#ifdef USE_PNG
const Graphics::Surface *srcSurface = nullptr;
Image::PNGDecoder decoder;
g_gui.lockIconsSet();
if (g_gui.getIconsSet().hasFile(name)) {
Common::SeekableReadStream *stream = g_gui.getIconsSet().createReadStreamForMember(name);
if (!decoder.loadStream(*stream)) {
g_gui.unlockIconsSet();
warning("Error decoding PNG");
return surf;
}
@ -308,10 +310,12 @@ Graphics::ManagedSurface *loadSurfaceFromFile(const Common::String &name, int re
} else {
debug(5, "GridWidget: Cannot read file '%s'", name.c_str());
}
g_gui.unlockIconsSet();
#else
error("No PNG support compiled");
#endif
} else if (name.hasSuffix(".svg")) {
g_gui.lockIconsSet();
if (g_gui.getIconsSet().hasFile(name)) {
Common::SeekableReadStream *stream = g_gui.getIconsSet().createReadStreamForMember(name);
Graphics::SVGBitmap *image = nullptr;
@ -325,6 +329,7 @@ Graphics::ManagedSurface *loadSurfaceFromFile(const Common::String &name, int re
} else {
debug(5, "GridWidget: Cannot read file '%s'", name.c_str());
}
g_gui.unlockIconsSet();
}
return surf;
}