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/* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */
#ifndef FIFO_H
#define FIFO_H
#include "base/i2-base.hpp"
#include "base/stream.hpp"
namespace icinga
{
/**
* A byte-based FIFO buffer.
*
* @ingroup base
*/
class FIFO final : public Stream
{
public:
DECLARE_PTR_TYPEDEFS(FIFO);
static const size_t BlockSize = 512;
~FIFO() override;
size_t Peek(void *buffer, size_t count, bool allow_partial = false) override;
size_t Read(void *buffer, size_t count, bool allow_partial = false) override;
void Write(const void *buffer, size_t count) override;
void Close() override;
bool IsEof() const override;
bool SupportsWaiting() const override;
bool IsDataAvailable() const override;
size_t GetAvailableBytes() const;
private:
char *m_Buffer{nullptr};
size_t m_DataSize{0};
size_t m_AllocSize{0};
size_t m_Offset{0};
void ResizeBuffer(size_t newSize, bool decrease);
void Optimize();
};
}
#endif /* FIFO_H */
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