de46401d85
- Moved all Loader functionality into Loader class - Improvement for Dispatcher construction - Dispatcher and DispatcherThread: you can now specify the timeout when calling `dispatch()`. Default timeout is max timeout.
64 lines
1.5 KiB
C++
64 lines
1.5 KiB
C++
/**
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* @file pubsub.h
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* PubSub
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*/
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#pragma once
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#include "Mutex.h"
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#include <list>
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namespace tt {
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/** PubSub Callback type */
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typedef void (*PubSubCallback)(const void* message, void* context);
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/** Publish and subscribe to messages in a thread-safe manner. */
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class PubSub {
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private:
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struct Subscription {
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uint64_t id;
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PubSubCallback callback;
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void* callbackParameter;
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};
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typedef std::list<Subscription> Subscriptions;
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uint64_t lastId = 0;
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Subscriptions items;
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Mutex mutex;
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public:
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typedef void* SubscriptionHandle;
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PubSub() = default;
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~PubSub() {
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if (!items.empty()) {
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TT_LOG_W("Loader", "Destroying PubSub with %d active subscriptions", items.size());
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}
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}
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/** Start receiving messages at the specified handle (Threadsafe, Re-entrable)
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* @param[in] callback
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* @param[in] callbackParameter the data to pass to the callback
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* @return subscription instance
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*/
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SubscriptionHandle subscribe(PubSubCallback callback, void* callbackParameter);
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/** Stop receiving messages at the specified handle (Threadsafe, Re-entrable.)
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* No use of `tt_pubsub_subscription` allowed after call of this method
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* @param[in] subscription
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*/
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void unsubscribe(SubscriptionHandle subscription);
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/** Publish message to all subscribers (Threadsafe, Re-entrable.)
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* @param[in] message message pointer to publish - it is passed as-is to the callback
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*/
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void publish(void* message);
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};
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} // namespace
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