#ifndef PurgeableBuffer_h
#define PurgeableBuffer_h
#include "PurgePriority.h"
#include <wtf/PassOwnPtr.h>
#include <wtf/Vector.h>
namespace WebCore {
class PurgeableBuffer {
WTF_MAKE_NONCOPYABLE(PurgeableBuffer);
public:
static PassOwnPtr<PurgeableBuffer> createUninitialized(size_t, char*& data);
static PassOwnPtr<PurgeableBuffer> create(const char* data, size_t);
~PurgeableBuffer();
const char* data() const;
size_t size() const { return m_size; }
PurgePriority purgePriority() const { return m_purgePriority; }
void setPurgePriority(PurgePriority priority) { m_purgePriority = priority; }
bool isPurgeable() const { return m_state != NonVolatile; }
bool wasPurged() const;
bool makePurgeable(bool purgeable);
private:
PurgeableBuffer(char* data, size_t);
char* m_data;
size_t m_size;
PurgePriority m_purgePriority;
enum State { NonVolatile, Volatile, Purged };
mutable State m_state;
};
#if !ENABLE(PURGEABLE_MEMORY)
inline PassOwnPtr<PurgeableBuffer> PurgeableBuffer::createUninitialized(size_t, char*&) { return nullptr; }
inline PassOwnPtr<PurgeableBuffer> PurgeableBuffer::create(const char*, size_t) { return nullptr; }
inline PurgeableBuffer::~PurgeableBuffer() { }
inline const char* PurgeableBuffer::data() const { return 0; }
inline bool PurgeableBuffer::wasPurged() const { return false; }
inline bool PurgeableBuffer::makePurgeable(bool) { return false; }
#endif
}
#endif