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config_path(): return a reference #438

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merged 1 commit into from
Aug 18, 2024
Merged

config_path(): return a reference #438

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6 changes: 3 additions & 3 deletions cpp/include/kvikio/cufile_config.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -22,12 +22,12 @@
namespace kvikio {
namespace detail {

[[nodiscard]] inline const std::string lookup_config_path()
[[nodiscard]] inline const char* lookup_config_path()
{
const char* env = std::getenv("CUFILE_ENV_PATH_JSON");
if (env != nullptr && std::filesystem::exists(env)) { return env; }
if (std::filesystem::exists("/etc/cufile.json")) { return "/etc/cufile.json"; }
Comment on lines 27 to 29
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side question: could this be done once (e.g. init a local static var)?

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It is done once, config_path() calls it to assign a static variable

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Got it. I assumed repeated calls because of the optimization.

return std::string();
return "";
}

} // namespace detail
Expand All @@ -39,7 +39,7 @@ namespace detail {
*
* @return The filepath to the cufile.json file or the empty string if it isn't found.
*/
[[nodiscard]] inline const std::string config_path()
[[nodiscard]] inline const std::string& config_path()
{
static const std::string ret = detail::lookup_config_path();
return ret;
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