Stxxl 1.2.1
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Defines interface of file. More...
#include <iobase.h>
Public Types | |
enum | open_mode { RDONLY = 1, WRONLY = 2, RDWR = 4, CREAT = 8, DIRECT = 16, TRUNC = 32 } |
Definition of acceptable file open modes. More... | |
Public Member Functions | |
virtual request_ptr | aread (void *buffer, stxxl::int64 pos, size_t bytes, completion_handler on_cmpl)=0 |
Schedules asynchronous read request to the file. | |
virtual request_ptr | awrite (void *buffer, stxxl::int64 pos, size_t bytes, completion_handler on_cmpl)=0 |
Schedules asynchronous write request to the file. | |
virtual void | set_size (stxxl::int64 newsize)=0 |
Changes the size of the file. | |
virtual stxxl::int64 | size ()=0 |
Returns size of the file. | |
Protected Member Functions | |
file (int _id) | |
Initializes file object. |
Defines interface of file.
It is a base class for different implementations that might base on various file systems or even remote storage interfaces
enum file::open_mode |
Definition of acceptable file open modes.
Various open modes in a file system must be converted to this set of acceptable modes
file::file | ( | int | _id | ) | [inline, protected] |
Initializes file object.
_id | file identifier |
virtual request_ptr file::aread | ( | void * | buffer, |
stxxl::int64 | pos, | ||
size_t | bytes, | ||
completion_handler | on_cmpl | ||
) | [pure virtual] |
Schedules asynchronous read request to the file.
buffer | pointer to memory buffer to read into |
pos | starting file position to read |
bytes | number of bytes to transfer |
on_cmpl | I/O completion handler |
request_ptr
object, that can be used to track the status of the operation Implemented in mem_file, mmap_file, sim_disk_file, and syscall_file.
Referenced by typed_block< sizeof(value_type), value_type >::read().
virtual request_ptr file::awrite | ( | void * | buffer, |
stxxl::int64 | pos, | ||
size_t | bytes, | ||
completion_handler | on_cmpl | ||
) | [pure virtual] |
Schedules asynchronous write request to the file.
buffer | pointer to memory buffer to write from |
pos | starting file position to write |
bytes | number of bytes to transfer |
on_cmpl | I/O completion handler |
request_ptr
object, that can be used to track the status of the operation Implemented in mem_file, mmap_file, sim_disk_file, and syscall_file.
Referenced by typed_block< sizeof(value_type), value_type >::write().
virtual void file::set_size | ( | stxxl::int64 | newsize | ) | [pure virtual] |
Changes the size of the file.
newsize | value of the new file size |
Implemented in mem_file, sim_disk_file, and ufs_file_base.
Referenced by vector< Tp_, PgSz_, PgTp_, BlkSize_, AllocStr_, SzTp_ >::vector().
virtual stxxl::int64 file::size | ( | ) | [pure virtual] |