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#ifndef RUNTIME_CONTAINERS_RINGBUFFERS_H
#define RUNTIME_CONTAINERS_RINGBUFFERS_H
#include "GrowingRingbuffer.h"
#include "Ringbuffer.h"
#include "TransactionalRingbuffer.h"
#include "Runtime/Threads/Semaphore.h"
#include "Runtime/Utilities/NonCopyable.h"
#if SUPPORT_THREADS
namespace RingbufferTemplates
{
// ------------------------------------------------------------------------
// Support base classes used to avoid casting to 'normal' ringbuffer impl
// ------------------------------------------------------------------------
template <class Ringbuffer>
class NonCastable : protected Ringbuffer
{
public:
using Ringbuffer::WritePtr;
using Ringbuffer::WritePtrUpdate;
using Ringbuffer::ReadPtr;
using Ringbuffer::ReadPtrUpdate;
using Ringbuffer::GetSize;
using Ringbuffer::GetFreeSize;
using Ringbuffer::GetAllocatedSize;
using Ringbuffer::GetAvailableSize;
using Ringbuffer::Reset;
protected:
NonCastable(MemLabelId label, UInt32 size) : Ringbuffer(label, size) {}
};
// ------------------------------------------------------------------------
// Adds support for notifications whenever data or free space is available
// ------------------------------------------------------------------------
template <class Ringbuffer>
class AbstractNotificationSupport : public NonCastable<Ringbuffer>, public NonCopyable
{
public:
AbstractNotificationSupport(MemLabelId label, UInt32 size) : NonCastable<Ringbuffer>(label, size) {}
void ReleaseBlockedThreads(bool indefinitely = false)
{
m_FreeSemaphore.Suspend(indefinitely);
m_AvailableSemaphore.Suspend(indefinitely);
}
void BlockUntilFree()
{
if (Ringbuffer::GetFreeSize())
return;
m_FreeSemaphore.Resume(true);
if (Ringbuffer::GetFreeSize() == 0)
m_FreeSemaphore.WaitForSignal();
m_FreeSemaphore.Suspend();
}
void BlockUntilAvailable()
{
if (Ringbuffer::GetAvailableSize())
return;
m_AvailableSemaphore.Resume(true);
if (Ringbuffer::GetAvailableSize() == 0)
m_AvailableSemaphore.WaitForSignal();
m_AvailableSemaphore.Suspend();
}
protected:
SuspendableSemaphore m_AvailableSemaphore;
SuspendableSemaphore m_FreeSemaphore;
};
template <class Ringbuffer>
class RNotificationSupport : public AbstractNotificationSupport<Ringbuffer>
{
public:
RNotificationSupport(MemLabelId label, UInt32 size) : AbstractNotificationSupport<Ringbuffer>(label, size) {}
void WritePtrUpdate(void* writePtr, UInt32 nBytesWritten)
{
Ringbuffer::WritePtrUpdate(writePtr, nBytesWritten);
AbstractNotificationSupport<Ringbuffer>::m_AvailableSemaphore.Signal();
}
void ReadPtrUpdate(const void* readPtr, UInt32 nBytesRead)
{
Ringbuffer::ReadPtrUpdate(readPtr, nBytesRead);
AbstractNotificationSupport<Ringbuffer>::m_FreeSemaphore.Signal();
}
};
template <class TransactionalRingbuffer>
class TRNotificationSupport : public AbstractNotificationSupport<TransactionalRingbuffer>
{
public:
TRNotificationSupport(MemLabelId label, UInt32 size) : AbstractNotificationSupport<TransactionalRingbuffer>(label, size) {}
using AbstractNotificationSupport<TransactionalRingbuffer>::ReadPtrReset;
using AbstractNotificationSupport<TransactionalRingbuffer>::WritePtrReset;
void WritePtrCommit()
{
AbstractNotificationSupport<TransactionalRingbuffer>::WritePtrCommit();
AbstractNotificationSupport<TransactionalRingbuffer>::m_AvailableSemaphore.Signal();
}
void ReadPtrCommit()
{
AbstractNotificationSupport<TransactionalRingbuffer>::ReadPtrCommit();
AbstractNotificationSupport<TransactionalRingbuffer>::m_FreeSemaphore.Signal();
}
};
}
typedef RingbufferTemplates::RNotificationSupport<Ringbuffer> ExtendedRingbuffer;
typedef RingbufferTemplates::RNotificationSupport<GrowingRingbuffer> ExtendedGrowingRingbuffer;
typedef RingbufferTemplates::TRNotificationSupport<TransactionalRingbuffer> ExtendedTransactionalRingbuffer;
#else // no thread support
namespace RingbufferTemplates
{
template <class Ringbuffer>
class NotificationSupport : public Ringbuffer, public NonCopyable
{
public:
NotificationSupport(MemLabelId label, UInt32 size) : Ringbuffer(label, size) {}
void ReleaseBlockedThreads(bool indefinitely = false) {}
void BlockUntilFree() {}
void BlockUntilAvailable() {}
};
}
typedef RingbufferTemplates::NotificationSupport<Ringbuffer> ExtendedRingbuffer;
typedef RingbufferTemplates::NotificationSupport<GrowingRingbuffer> ExtendedGrowingRingbuffer;
typedef RingbufferTemplates::NotificationSupport<TransactionalRingbuffer> ExtendedTransactionalRingbuffer;
#endif
#endif //RUNTIME_CONTAINERS_RINGBUFFERS_H
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