jfrMemoryWriterHost.hpp

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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#ifndef SHARE_JFR_WRITERS_JFRMEMORYWRITERHOST_HPP
#define SHARE_JFR_WRITERS_JFRMEMORYWRITERHOST_HPP

#include "jfr/writers/jfrStorageHost.inline.hpp"

#ifdef ASSERT
class ExclusiveAccessAssert {
 private:
  bool _acquired;
 public:
  ExclusiveAccessAssert() : _acquired(false) {}
  void acquire() { assert_non_acquired(); _acquired = true; }
  void release() { assert_acquired(); _acquired = false; }
  bool is_acquired() const { return _acquired; }
  void assert_acquired() const { assert(_acquired, "Not acquired!"); }
  void assert_non_acquired() const { assert(!_acquired, "Already acquired!"); }
};
#else
 class ExclusiveAccessAssert {};
#endif

template <typename Adapter, typename AP, typename AccessAssert = ExclusiveAccessAssert>
class MemoryWriterHost : public StorageHost<Adapter, AP> {
  debug_only(AccessAssert _access;)
 public:
  typedef typename Adapter::StorageType StorageType;
 protected:
  void write_bytes(void* dest, const void* buf, intptr_t len);
  MemoryWriterHost(StorageType* storage, Thread* thread);
  MemoryWriterHost(StorageType* storage, size_t size);
  MemoryWriterHost(Thread* thread);
  debug_only(bool is_acquired() const;)
 public:
  void acquire();
  void release();
};

template <typename Adapter, typename AP>
class AcquireReleaseMemoryWriterHost : public MemoryWriterHost<Adapter, AP> {
 public:
  typedef typename Adapter::StorageType StorageType;
  AcquireReleaseMemoryWriterHost(StorageType* storage, Thread* thread);
  AcquireReleaseMemoryWriterHost(StorageType* storage, size_t size);
  AcquireReleaseMemoryWriterHost(Thread* thread);
  ~AcquireReleaseMemoryWriterHost();
};

#endif // SHARE_JFR_WRITERS_JFRMEMORYWRITERHOST_HPP