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Thanks to std::swap and move semantics, there's no need for indirection here.

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This commit is contained in:
Thomas Harte 2022-07-14 15:52:31 -04:00
parent 8310b40812
commit 126838e7c7
1 changed files with 6 additions and 7 deletions
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13
Concurrency/AsyncUpdater.hpp
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@ -21,16 +21,15 @@ template <typename Performer> class AsyncUpdater {
public:
template <typename... Args> AsyncUpdater(Args&&... args) :
performer(std::forward<Args>(args)...),
actions_(std::make_unique<ActionVector>()),
performer_thread_{
[this] {
Time::Nanos last_fired = Time::nanos_now();
auto actions = std::make_unique<ActionVector>();
ActionVector actions;
while(!should_quit) {
// Wait for new actions to be signalled, and grab them.
std::unique_lock lock(condition_mutex_);
while(actions_->empty()) {
while(actions_.empty()) {
condition_.wait(lock);
}
std::swap(actions, actions_);
@ -42,10 +41,10 @@ template <typename Performer> class AsyncUpdater {
last_fired = time_now;
// Perform the actions.
for(const auto& action: *actions) {
for(const auto& action: actions) {
action();
}
actions->clear();
actions.clear();
}
}
} {}
@ -58,7 +57,7 @@ template <typename Performer> class AsyncUpdater {
/// Actions may be elided,
void update(const std::function<void(void)> &post_action) {
std::lock_guard guard(condition_mutex_);
actions_->push_back(post_action);
actions_.push_back(post_action);
condition_.notify_all();
}
@ -81,7 +80,7 @@ template <typename Performer> class AsyncUpdater {
// The list of actions waiting be performed. These will be elided,
// increasing their latency, if the emulation thread falls behind.
using ActionVector = std::vector<std::function<void(void)>>;
std::unique_ptr<ActionVector> actions_;
ActionVector actions_;
// Necessary synchronisation parts.
std::atomic<bool> should_quit = false;