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24 
25 #ifndef SHARE_VM_JFR_WRITERS_JFRSTREAMWRITERHOST_HPP
26 #define SHARE_VM_JFR_WRITERS_JFRSTREAMWRITERHOST_HPP
27 
28 #include "jfr/utilities/jfrTypes.hpp"
29 #include "jfr/writers/jfrMemoryWriterHost.inline.hpp"
30 
31 template <typename Adapter, typename AP> // Adapter and AllocationPolicy
32 class StreamWriterHost : public MemoryWriterHost<Adapter, AP> {
33  public:
34   typedef typename Adapter::StorageType StorageType;
35  private:
36   int64_t _stream_pos;
37   fio_fd _fd;
38   int64_t current_stream_position() const;
39 
40  protected:
41   StreamWriterHost(StorageType* storage, Thread* thread);
42   StreamWriterHost(StorageType* storage, size_t size);
43   StreamWriterHost(Thread* thread);
44   bool accommodate(size_t used, size_t requested);
45   void bytes(void* dest, const void* src, size_t len);
46   void flush(size_t size);
47   bool has_valid_fd() const;
48 
49  public:
50   int64_t current_offset() const;
51   void seek(int64_t offset);
52   void flush();
53   void write_unbuffered(const void* src, size_t len);
54   bool is_valid() const;
55   void close_fd();
56   void reset(fio_fd fd);
57 };
58 
59 #endif // SHARE_VM_JFR_WRITERS_JFRSTREAMWRITERHOST_HPP
60 
61