haiku/headers/private/app/LinkSender.h

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/*
* Copyright 2001-2005, Haiku.
* Distributed under the terms of the MIT License.
*
* Authors:
* DarkWyrm <bpmagic@columbus.rr.com>
* Pahtz <pahtz@yahoo.com.au>
* Axel Dörfler, axeld@pinc-software.de
*/
#ifndef _LINK_SENDER_H
#define _LINK_SENDER_H
#include <OS.h>
namespace BPrivate {
class LinkSender {
public:
LinkSender(port_id sendport);
virtual ~LinkSender(void);
void SetPort(port_id port);
port_id Port() { return fPort; }
status_t StartMessage(int32 code, size_t minSize = 0);
void CancelMessage(void);
status_t EndMessage(bool needsReply = false);
status_t Flush(bigtime_t timeout = B_INFINITE_TIMEOUT, bool needsReply = false);
status_t Attach(const void *data, size_t size);
status_t AttachString(const char *string, int32 maxLength = -1);
template <class Type> status_t Attach(const Type& data)
{
return Attach(&data, sizeof(Type));
}
protected:
size_t SpaceLeft() const { return fBufferSize - fCurrentEnd; }
size_t CurrentMessageSize() const { return fCurrentEnd - fCurrentStart; }
status_t AdjustBuffer(size_t newBufferSize, char **_oldBuffer = NULL);
status_t FlushCompleted(size_t newBufferSize);
port_id fPort;
char *fBuffer;
size_t fBufferSize;
uint32 fCurrentEnd; // current append position
uint32 fCurrentStart; // start of current message
status_t fCurrentStatus;
};
} // namespace BPrivate
#endif /* _LINK_SENDER_H */