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win32/ComWorker: remove parameter passing from Async() 

Parameters should better be captured.  This removes some complexity
from Async().
This commit is contained in:
Max Kellermann 2021-03-07 18:17:16 +01:00
parent 90d97053a8
commit cf108c389f
1 changed files with 5 additions and 10 deletions
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15
src/win32/ComWorker.hxx
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@ -65,24 +65,19 @@ public:
COMWorker(const COMWorker &) = delete;
COMWorker &operator=(const COMWorker &) = delete;
template <typename Function, typename... Args>
auto Async(Function &&function, Args &&...args) {
using R = std::invoke_result_t<std::decay_t<Function>,
std::decay_t<Args>...>;
template<typename Function>
auto Async(Function &&function) {
using R = std::invoke_result_t<std::decay_t<Function>>;
auto promise = std::make_shared<Promise<R>>();
auto future = promise->get_future();
thread.Push([function = std::forward<Function>(function),
args = std::make_tuple(std::forward<Args>(args)...),
promise = std::move(promise)]() mutable {
try {
if constexpr (std::is_void_v<R>) {
std::apply(std::forward<Function>(function),
std::move(args));
std::invoke(std::forward<Function>(function));
promise->set_value();
} else {
promise->set_value(std::apply(
std::forward<Function>(function),
std::move(args)));
promise->set_value(std::invoke(std::forward<Function>(function)));
}
} catch (...) {
promise->set_exception(std::current_exception());