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#include "event.h"
#include "mutex.h"
#include "yassert.h"
#include "condvar.h"
#include "datetime.h"
#include "spinlock.h"
#include <util/generic/ylimits.h>
#include <util/generic/intrlist.h>
#include <util/generic/yexception.h>
#if defined(_unix_)
#include <sys/time.h>
#include <pthread.h>
#include <cerrno>
#endif
namespace {
class TCondVarImpl {
using TLock = TAdaptiveLock;
struct TWaitEvent: public TIntrusiveListItem<TWaitEvent>, public TSystemEvent {
};
using TWaitEvents = TIntrusiveList<TWaitEvent>;
public:
inline ~TCondVarImpl() {
Y_ASSERT(Events_.Empty());
}
inline void Signal() noexcept {
with_lock (Lock_) {
if (!Events_.Empty()) {
Events_.PopFront()->Signal();
}
}
}
inline void BroadCast() noexcept {
with_lock (Lock_) {
// TODO
while (!Events_.Empty()) {
Events_.PopFront()->Signal();
}
}
}
inline bool WaitD(TMutex& m, TInstant deadLine) noexcept {
TWaitEvent event;
with_lock (Lock_) {
Events_.PushBack(&event);
}
m.Release();
const bool signalled = event.WaitD(deadLine);
m.Acquire();
with_lock (Lock_) {
event.Unlink();
}
return signalled;
}
private:
TWaitEvents Events_;
TLock Lock_;
};
} // namespace
#if defined(_win_)
class TCondVar::TImpl: public TCondVarImpl {
};
#else
class TCondVar::TImpl {
public:
inline TImpl() {
if (pthread_cond_init(&Cond_, nullptr)) {
ythrow yexception() << "can not create condvar(" << LastSystemErrorText() << ")";
}
}
inline ~TImpl() {
int ret = pthread_cond_destroy(&Cond_);
Y_ABORT_UNLESS(ret == 0, "pthread_cond_destroy failed: %s", LastSystemErrorText(ret));
}
inline void Signal() noexcept {
int ret = pthread_cond_signal(&Cond_);
Y_ABORT_UNLESS(ret == 0, "pthread_cond_signal failed: %s", LastSystemErrorText(ret));
}
inline bool WaitD(TMutex& lock, TInstant deadLine) noexcept {
if (deadLine == TInstant::Max()) {
int ret = pthread_cond_wait(&Cond_, (pthread_mutex_t*)lock.Handle());
Y_ABORT_UNLESS(ret == 0, "pthread_cond_wait failed: %s", LastSystemErrorText(ret));
return true;
} else {
struct timespec spec;
Zero(spec);
spec.tv_sec = deadLine.Seconds();
spec.tv_nsec = deadLine.NanoSecondsOfSecond();
int ret = pthread_cond_timedwait(&Cond_, (pthread_mutex_t*)lock.Handle(), &spec);
Y_ABORT_UNLESS(ret == 0 || ret == ETIMEDOUT, "pthread_cond_timedwait failed: %s", LastSystemErrorText(ret));
return ret == 0;
}
}
inline void BroadCast() noexcept {
int ret = pthread_cond_broadcast(&Cond_);
Y_ABORT_UNLESS(ret == 0, "pthread_cond_broadcast failed: %s", LastSystemErrorText(ret));
}
private:
pthread_cond_t Cond_;
};
#endif
TCondVar::TCondVar()
: Impl_(new TImpl)
{
}
TCondVar::~TCondVar() = default;
void TCondVar::BroadCast() noexcept {
Impl_->BroadCast();
}
void TCondVar::Signal() noexcept {
Impl_->Signal();
}
bool TCondVar::WaitD(TMutex& mutex, TInstant deadLine) noexcept {
return Impl_->WaitD(mutex, deadLine);
}
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