common: fs: file: Flush the file to the disk when Flush() is called
std::fflush does not guarantee that file buffers are flushed to the disk. Use _commit on Windows and fsync on all other OSes to ensure that the file is flushed to the disk.
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@ -309,7 +309,11 @@ bool IOFile::Flush() const {
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errno = 0;
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const auto flush_result = std::fflush(file) == 0;
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#ifdef _WIN32
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const auto flush_result = std::fflush(file) == 0 && _commit(fileno(file)) == 0;
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#else
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const auto flush_result = std::fflush(file) == 0 && fsync(fileno(file)) == 0;
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#endif
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if (!flush_result) {
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const auto ec = std::error_code{errno, std::generic_category()};
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