/*************************************************************************
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 *  $RCSfile: pipe_decl.hxx,v $
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 *  last change: $Author: hro $ $Date: 2002/07/12 10:55:08 $
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 *  Sun Microsystems Inc., October, 2000
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 *  GNU Lesser General Public License Version 2.1
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 *  Sun Industry Standards Source License Version 1.1
 *  =================================================
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#ifndef _OSL_PIPE_DECL_HXX_
#define _OSL_PIPE_DECL_HXX_

#ifndef _OSL_PIPE_H_
#include <osl/pipe.h>
#endif

#ifndef _OSL_SECURITY_HXX_
#	include <osl/security.hxx>
#endif

#ifndef _RTL_USTRING_HXX_
#include <rtl/ustring.hxx>
#endif

namespace osl {
	
class StreamPipe;

/** Represents a pipe.
*/
class Pipe 
{
protected:
	oslPipe m_handle;

public:

	/** Does not create a pipe. Use assignment operator to
	    make this a useable pipe.
	*/
	inline Pipe();

	/** Creates an insecure pipe that is accessible for all users.
		@param strName 
		@param Options
	*/
	inline Pipe(const ::rtl::OUString& strName, oslPipeOptions Options);

	/** Creates a secure pipe that access depends on the umask settings.
		@param strName 
		@param Options
		@param Security
	*/
	inline Pipe(const ::rtl::OUString& strName, oslPipeOptions Options,const Security & rSecurity);

	/** Copy constructor.
	*/
	inline Pipe(const Pipe& pipe);

	/** Constructs a Pipe reference without acquiring the handle
	*/
	inline Pipe( oslPipe pipe, __sal_NoAcquire noacquire );

	/** Creates pipe as wrapper around the underlying oslPipe.
		@param Pipe
	*/
    inline Pipe(oslPipe Pipe);

	/** Destructor. Destroys the underlying oslPipe.
	*/
    inline ~Pipe();

	inline sal_Bool SAL_CALL is() const;

	/** Creates an insecure pipe that is accessible for all users
		with the given attributes.
		If the pipe was already created, the old one will be discarded.
		@param strName 
		@param Options
		@param Security
		@return True if socket was successfully created.
	*/
	inline sal_Bool create( const ::rtl::OUString & strName,
							oslPipeOptions Options, const Security &rSec );

	/** Creates a secure that access rights depend on the umask settings
		with the given attributes.	

		If socket was already created, the old one will be discarded.
		@param strName 
		@param Options
		@return True if socket was successfully created.
	*/
	inline sal_Bool create( const ::rtl::OUString & strName, oslPipeOptions Options = osl_Pipe_OPEN );

	/** releases the underlying handle
	 */
	inline void SAL_CALL clear();

	/** Assignment operator. If pipe was already created, the old one will
		be discarded.
	*/
	inline Pipe& SAL_CALL operator= (const Pipe& pipe);

	/** Assignment operator. If pipe was already created, the old one will
		be discarded.
	*/
	inline Pipe& SAL_CALL operator= (const oslPipe pipe );

	/** Checks if the pipe is valid.
		@return True if the object represents a valid pipe.
	*/
	inline sal_Bool SAL_CALL isValid() const;

	inline sal_Bool SAL_CALL operator==( const Pipe& rPipe ) const;

	/** Closes the pipe. 
	*/
    inline void SAL_CALL close();

	/** Accept connection on an existing pipe
	*/
	inline oslPipeError SAL_CALL accept(StreamPipe& Connection);
	

	/** Delivers a constant decribing the last error for the pipe system.
		@return ENONE if no error occured, invalid_PipeError if
		an unknown (unmapped) error occured, otherwise an enum describing the
		error.
	*/
	inline oslPipeError SAL_CALL getError() const;

	inline oslPipe SAL_CALL getHandle() const;
};

/** A pipe to send or receive a stream of data.
*/
class StreamPipe : public Pipe
{
public:

	/** Creates an unattached pipe. You must attach the pipe to an oslPipe
		e.g. by using the operator=(oslPipe), before you can use the stream-
		functionality of the object.
	*/
	inline StreamPipe();

	/** Creates pipe as wrapper around the underlying oslPipe.
		@param Pipe
	*/
    inline StreamPipe(oslPipe Pipe);

	/** Copy constructor.
		@param Pipe
	*/
    inline StreamPipe(const StreamPipe& Pipe);

	/** Creates a pipe.
		@param strName 
		@param Options
	*/
    inline StreamPipe(const ::rtl::OUString& strName, oslPipeOptions Options = osl_Pipe_OPEN);

	/** Creates a pipe.
		@param strName 
		@param Options
		@param rSec
	*/
    inline StreamPipe(const ::rtl::OUString& strName, oslPipeOptions Options, const Security &rSec );

	/** Constructs a Pipe reference without acquiring the handle
	*/
	inline StreamPipe( oslPipe pipe, __sal_NoAcquire noacquire );

	/** Attaches the oslPipe to this object. If the object
		already was attached to an oslPipe, the old one will
		be closed and destroyed.
		@param Pipe.
	*/
	inline StreamPipe & SAL_CALL operator=(oslPipe Pipe);
	
	/** Assignment operator
	*/
	inline StreamPipe& SAL_CALL operator=(const Pipe& pipe);

	/** Tries to receives BytesToRead data from the connected pipe,
		
		@param pBuffer [out] Points to a buffer that will be filled with the received 
		data.
		@param BytesToRead [in] The number of bytes to read. pBuffer must have at least
		this size.
		@return the number of received bytes.
	*/
	inline sal_Int32 SAL_CALL recv(void* pBuffer, sal_Int32 BytesToRead) const;

	/** Tries to sends BytesToSend data from the connected pipe.
		
		@param pBuffer [in] Points to a buffer that contains the send-data.
		@param BytesToSend [in] The number of bytes to send. pBuffer must have at least
		this size.
		@return the number of transfered bytes.
	*/
	inline sal_Int32 SAL_CALL send(const void* pBuffer, sal_Int32 BytesToSend) const;
	
	/** Retrieves n bytes from the stream and copies them into pBuffer.
		The method avoids incomplete reads due to packet boundaries.		
		@param pBuffer receives the read data.
		@param n the number of bytes to read. pBuffer must be large enough
		to hold the n bytes!
		@return	the number of read bytes. The number will only be smaller than
		n if an exceptional condition (e.g. connection closed) occurs.				 
	*/
    inline sal_Int32 SAL_CALL read(void* pBuffer, sal_Int32 n) const;

	/** Writes n bytes from pBuffer to the stream. The method avoids 
		incomplete writes due to packet boundaries.
		@param pBuffer contains the data to be written.
		@param n the number of bytes to write.
		@return the number of written bytes. The number will only be smaller than
		n if an exceptional condition (e.g. connection closed) occurs.				
	*/
    sal_Int32 SAL_CALL write(const void* pBuffer, sal_Int32 n) const;
};

}
#endif
