C++ conversion (#80)

Converted project to C++

TactilityCore/Source/Pubsub.cpp

@@ -0,0 +1,84 @@
+#include "Pubsub.h"
+#include "Check.h"
+#include "Mutex.h"
+#include <list>
+
+namespace tt {
+
+struct PubSubSubscription {
+    uint64_t id;
+    PubSubCallback callback;
+    void* callback_context;
+};
+
+typedef std::list<PubSubSubscription> Subscriptions;
+
+struct PubSub {
+    uint64_t last_id = 0;
+    Subscriptions items;
+    Mutex* mutex;
+};
+
+PubSub* tt_pubsub_alloc() {
+    auto* pubsub = new PubSub();
+
+    pubsub->mutex = tt_mutex_alloc(MutexTypeNormal);
+    tt_assert(pubsub->mutex);
+
+    return pubsub;
+}
+
+void tt_pubsub_free(PubSub* pubsub) {
+    tt_assert(pubsub);
+    tt_check(pubsub->items.empty());
+    tt_mutex_free(pubsub->mutex);
+    delete pubsub;
+}
+
+PubSubSubscription* tt_pubsub_subscribe(PubSub* pubsub, PubSubCallback callback, void* callback_context) {
+    tt_check(tt_mutex_acquire(pubsub->mutex, TtWaitForever) == TtStatusOk);
+    PubSubSubscription subscription = {
+        .id = (++pubsub->last_id),
+        .callback = callback,
+        .callback_context = callback_context
+    };
+    pubsub->items.push_back(
+        subscription
+    );
+
+    tt_check(tt_mutex_release(pubsub->mutex) == TtStatusOk);
+
+    return (PubSubSubscription*)pubsub->last_id;
+}
+
+void tt_pubsub_unsubscribe(PubSub* pubsub, PubSubSubscription* pubsub_subscription) {
+    tt_assert(pubsub);
+    tt_assert(pubsub_subscription);
+
+    tt_check(tt_mutex_acquire(pubsub->mutex, TtWaitForever) == TtStatusOk);
+    bool result = false;
+    auto id = (uint64_t)pubsub_subscription;
+    for (auto it = pubsub->items.begin(); it != pubsub->items.end(); it++) {
+        if (it->id == id) {
+            pubsub->items.erase(it);
+            result = true;
+            break;
+        }
+    }
+
+    tt_check(tt_mutex_release(pubsub->mutex) == TtStatusOk);
+    tt_check(result);
+}
+
+void tt_pubsub_publish(PubSub* pubsub, void* message) {
+    tt_check(tt_mutex_acquire(pubsub->mutex, TtWaitForever) == TtStatusOk);
+
+    // Iterate over subscribers
+    for (auto& it : pubsub->items) {
+        it.callback(message, it.callback_context);
+    }
+
+    tt_check(tt_mutex_release(pubsub->mutex) == TtStatusOk);
+}
+
+} // namespace