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153 lines
2.9 KiB
C++
153 lines
2.9 KiB
C++
7 years ago
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#include <llarp/timer.h>
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#include <map>
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#include <condition_variable>
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#include <atomic>
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#include <list>
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namespace llarp
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{
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struct timer
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{
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static uint64_t now()
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{
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return std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::steady_clock::now().time_since_epoch()).count();
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}
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void * user;
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uint64_t started;
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uint64_t timeout;
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llarp_timer_handler_func func;
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timer(uint64_t ms=0, void * _user=nullptr, llarp_timer_handler_func _func=nullptr) :
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user(_user),
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started(now()),
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timeout(ms),
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func(_func)
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{
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}
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void operator () () {
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if (func)
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{
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auto ms = now();
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auto diff = ms - started;
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if (diff >= timeout)
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func(user, timeout, 0);
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else
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func(user, timeout, diff);
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}
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}
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};
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};
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struct llarp_timer_context
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{
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std::mutex timersMutex;
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std::map<uint32_t, llarp::timer> timers;
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std::mutex tickerMutex;
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std::condition_variable ticker;
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std::chrono::milliseconds nextTickLen = std::chrono::seconds(1);
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uint32_t ids = 0;
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std::atomic<bool> _run = true;
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bool run()
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{
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return _run.load();
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}
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void stop()
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{
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_run.store(false);
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}
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void cancel(uint32_t id, bool lockit=true)
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{
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std::unique_lock<std::mutex> * lock = nullptr;
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if(lockit)
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lock = new std::unique_lock<std::mutex>(timersMutex);
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auto itr = timers.find(id);
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if(itr != timers.end())
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{
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itr->second();
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timers.erase(id);
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}
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if(lock) delete lock;
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}
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uint32_t call_later(void * user, llarp_timer_handler_func func, uint64_t timeout_ms)
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{
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std::unique_lock<std::mutex> lock(timersMutex);
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uint32_t id = ids ++;
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timers[id] = llarp::timer(timeout_ms);
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return id;
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}
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void cancel_all()
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{
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std::unique_lock<std::mutex> lock(timersMutex);
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std::list<uint32_t> ids;
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for (auto & item : timers)
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{
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ids.push_back(item.first);
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}
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for(auto id : ids)
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{
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cancel(id, false);
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}
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}
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};
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extern "C" {
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struct llarp_timer_context * llarp_init_timer()
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{
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return new llarp_timer_context;
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}
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uint32_t llarp_timer_call_later(struct llarp_timer_context * t, struct llarp_timeout_job job)
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{
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return t->call_later(job.user, job.handler, job.timeout);
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}
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void llarp_free_timer(struct llarp_timer_context ** t)
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{
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if(*t)
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delete *t;
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*t = nullptr;
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}
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void llarp_timer_stop(struct llarp_timer_context * t)
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{
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t->cancel_all();
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t->stop();
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}
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void llarp_timer_cancel(struct llarp_timer_context * t, uint32_t id)
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{
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t->cancel(id);
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}
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void llarp_timer_run(struct llarp_timer_context * t, struct llarp_threadpool * pool)
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{
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std::unique_lock<std::mutex> lock(t->tickerMutex);
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while(t->run())
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{
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auto status = t->ticker.wait_for(lock, t->nextTickLen);
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if(status == std::cv_status::no_timeout)
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{
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// we woke up
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}
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}
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}
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}
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