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cfg: fix config save atomicity (#760)

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## Link to GitHub Issue or related Pull Request, if one exists
n/a

## Description of change
Fully flush `tmp` file and then use `MoveFileExW` instead of `CopyFileW`
which guarantees atomic operation on NTFS.

## Testing
This commit is contained in:
bicarus
2026-06-15 02:06:04 -07:00
committed by GitHub
parent 6fec169347
commit ac51acdafe
4 changed files with 42 additions and 16 deletions
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src/spice2x/cfg/controller_presets.cpp
+5 -8
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@@ -359,13 +359,12 @@ namespace overlay::windows {
return false;
}
std::error_code ec;
std::filesystem::rename(path_tmp, path, ec);
if (ec) {
log_warning("templates", "failed to rename templates file: {}", ec.message());
if (MoveFileExW(path_tmp.c_str(), path.c_str(), MOVEFILE_REPLACE_EXISTING | MOVEFILE_WRITE_THROUGH) == 0) {
log_warning("templates", "failed to rename templates file: 0x{:08x}", GetLastError());
return false;
}
log_info("templates", "templates file saved successfully");
return true;
}
@@ -397,8 +396,7 @@ namespace overlay::windows {
auto path_tmp = path;
path_tmp.replace_extension(L"tmp");
if (doc.SaveFile(path_tmp.c_str()) == tinyxml2::XML_SUCCESS) {
std::error_code ec;
std::filesystem::rename(path_tmp, path, ec);
MoveFileExW(path_tmp.c_str(), path.c_str(), MOVEFILE_REPLACE_EXISTING | MOVEFILE_WRITE_THROUGH);
}
}
@@ -434,8 +432,7 @@ namespace overlay::windows {
auto path_tmp = path;
path_tmp.replace_extension(L"tmp");
if (doc.SaveFile(path_tmp.c_str()) == tinyxml2::XML_SUCCESS) {
std::error_code ec;
std::filesystem::rename(path_tmp, path, ec);
MoveFileExW(path_tmp.c_str(), path.c_str(), MOVEFILE_REPLACE_EXISTING | MOVEFILE_WRITE_THROUGH);
}
}