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Call QPromise::start() early to avoid race condition

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PR #22617.
This commit is contained in:
Vladimir Golovnev
2025-04-28 17:26:51 +03:00
committed by sledgehammer999
parent ad4bdc0653
commit c2f2a38582
4 changed files with 6 additions and 7 deletions
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5
src/base/bittorrent/filesearcher.cpp
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@@ -63,10 +63,8 @@ namespace
}
void FileSearcher::search(const PathList &originalFileNames, const Path &savePath
, const Path &downloadPath, const bool forceAppendExt, QPromise<FileSearchResult> promise)
, const Path &downloadPath, const bool forceAppendExt, QPromise<FileSearchResult> &promise)
{
promise.start();
Path usedPath = savePath;
PathList adjustedFileNames = originalFileNames;
const bool found = findInDir(usedPath, adjustedFileNames, (forceAppendExt && downloadPath.isEmpty()));
@@ -77,5 +75,4 @@ void FileSearcher::search(const PathList &originalFileNames, const Path &savePat
}
promise.addResult(FileSearchResult {.savePath = usedPath, .fileNames = adjustedFileNames});
promise.finish();
}

2
src/base/bittorrent/filesearcher.h
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@@ -49,5 +49,5 @@ public:
using QObject::QObject;
void search(const PathList &originalFileNames, const Path &savePath
, const Path &downloadPath, bool forceAppendExt, QPromise<FileSearchResult> promise);
, const Path &downloadPath, bool forceAppendExt, QPromise<FileSearchResult> &promise);
};

4
src/base/bittorrent/sessionimpl.cpp
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@@ -3008,9 +3008,11 @@ QFuture<FileSearchResult> SessionImpl::findIncompleteFiles(const Path &savePath,
{
QPromise<FileSearchResult> promise;
QFuture<FileSearchResult> future = promise.future();
promise.start();
QMetaObject::invokeMethod(m_fileSearcher, [=, this, promise = std::move(promise)]() mutable
{
m_fileSearcher->search(filePaths, savePath, downloadPath, isAppendExtensionEnabled(), std::move(promise));
m_fileSearcher->search(filePaths, savePath, downloadPath, isAppendExtensionEnabled(), promise);
promise.finish();
});
return future;

2
src/base/bittorrent/torrentimpl.cpp
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@@ -3055,9 +3055,9 @@ QFuture<std::invoke_result_t<Func>> TorrentImpl::invokeAsync(Func &&func) const
{
QPromise<std::invoke_result_t<Func>> promise;
const auto future = promise.future();
promise.start();
m_session->invokeAsync([func = std::forward<Func>(func), promise = std::move(promise)]() mutable
{
promise.start();
promise.addResult(func());
promise.finish();
});