* Copyright 2009-2011, Michael Lotz, mmlr@mlotz.ch.
* Distributed under the terms of the MIT License.
*/
#ifndef PROTOCOL_HANDLER_H
#define PROTOCOL_HANDLER_H
#include <SupportDefs.h>
#define PROTOCOL_HANDLER_COOKIE_FLAG_CLOSED 0x80000000
class HIDDevice;
class HIDReport;
class ProtocolHandler {
public:
ProtocolHandler(HIDDevice *device,
const char *basePath,
size_t ringBufferSize);
virtual ~ProtocolHandler();
status_t InitCheck() { return fStatus; }
HIDDevice * Device() { return fDevice; }
const char * BasePath() { return fBasePath; }
void SetPublishPath(char *publishPath);
const char * PublishPath() { return fPublishPath; }
static void AddHandlers(HIDDevice &device,
ProtocolHandler *&handlerList,
uint32 &handlerCount);
virtual status_t Open(uint32 flags, uint32 *cookie);
virtual status_t Close(uint32 *cookie);
virtual status_t Read(uint32 *cookie, off_t position,
void *buffer, size_t *numBytes);
virtual status_t Write(uint32 *cookie, off_t position,
const void *buffer, size_t *numBytes);
virtual status_t Control(uint32 *cookie, uint32 op, void *buffer,
size_t length);
int32 RingBufferReadable();
status_t RingBufferRead(void *buffer, size_t length);
status_t RingBufferWrite(const void *buffer,
size_t length);
void SetNextHandler(ProtocolHandler *next);
ProtocolHandler * NextHandler() { return fNextHandler; };
status_t IOGetDeviceName(const char *name, void *buffer,
size_t length);
protected:
status_t fStatus;
private:
HIDDevice * fDevice;
const char * fBasePath;
char * fPublishPath;
struct ring_buffer *fRingBuffer;
ProtocolHandler * fNextHandler;
};
#endif
