STXXL (GIT-copy)

#ifndef SYSCALL_HEADER
#define SYSCALL_HEADER
/***************************************************************************
 *            syscall_file.h
 *
 *  Sat Aug 24 23:55:08 2002
 *  Copyright  2002  Roman Dementiev
 *  dementiev@mpi-sb.mpg.de
 ****************************************************************************/


#include "ufs_file.h"
#include "../common/debug.h"

__STXXL_BEGIN_NAMESPACE

  //! \addtogroup fileimpl
  //! \{

	//! \brief Implementation of file based on UNIX syscalls
	class syscall_file : public ufs_file_base
	{
	 protected:
	 public:
		//! \brief constructs file object
		//! \param filename path of file
		//! \attention filename must be resided at memory disk partition
		//! \param mode open mode, see \c stxxl::file::open_modes
		//! \param disk disk(file) identifier
		syscall_file(
				const std::string & filename, 
				int mode,
			  int disk = -1);
		request_ptr aread(
				void *buffer, 
				stxxl::int64 pos, 
				size_t bytes,
				completion_handler on_cmpl);
		request_ptr awrite(
				void *buffer, 
				stxxl::int64 pos,
				size_t bytes,
				completion_handler on_cmpl);
	};
	
	//! \brief Implementation of request based on UNIX syscalls
	class syscall_request: public ufs_request_base
	{
		friend class syscall_file;
	 protected:
		syscall_request(
				syscall_file * f, 
				void *buf, 
				stxxl::int64 off,	
				size_t b, 
				request_type t,
				completion_handler on_cmpl);
		void serve ();
	 public:
		const char *io_type ();
   private:
    // Following methods are declared but not implemented 
    // intentionnaly to forbid their usage
		syscall_request(const syscall_request &);
    	syscall_request & operator=(const syscall_request &);
		syscall_request();
	};

  
  //! \}
  
__STXXL_END_NAMESPACE


#endif