Implementation of disk emulation.
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#include <simdisk_file.h>
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| sim_disk_file (const std::string &filename, int mode, int queue_id=DEFAULT_QUEUE, int allocator_id=NO_ALLOCATOR) |
| constructs file object More...
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void | serve (const request *req) throw (io_error) |
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void | set_size (offset_type newsize) |
| Changes the size of the file. More...
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const char * | io_type () const |
| Identifies the type of I/O implementation. More...
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offset_type | size () |
| Returns size of the file. More...
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void | set_size (offset_type newsize) |
| Changes the size of the file. More...
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void | lock () |
| Locks file for reading and writing (acquires a lock in the file system) More...
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const char * | io_type () const |
| Identifies the type of I/O implementation. More...
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void | remove () |
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void | add_request_ref () |
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void | delete_request_ref () |
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int | get_request_nref () |
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virtual int | get_physical_device_id () const |
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virtual void | discard (offset_type offset, offset_type size) |
| Discard a region of the file (mark it unused) some specialized file types may need to know freed regions. More...
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virtual void | export_files (offset_type offset, offset_type length, std::string prefix) |
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| disk_queued_file (int queue_id, int allocator_id) |
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request_ptr | aread (void *buffer, offset_type pos, size_type bytes, const completion_handler &on_cmpl) |
| Schedules an asynchronous read request to the file. More...
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request_ptr | awrite (void *buffer, offset_type pos, size_type bytes, const completion_handler &on_cmpl) |
| Schedules an asynchronous write request to the file. More...
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virtual int | get_queue_id () const |
| Returns the identifier of the file's queue. More...
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virtual int | get_allocator_id () const |
| Returns the file's allocator. More...
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double | get_delay (file::offset_type offset, file::size_type size) |
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enum | open_mode {
RDONLY = 1,
WRONLY = 2,
RDWR = 4,
CREAT = 8,
DIRECT = 16,
TRUNC = 32,
SYNC = 64,
NO_LOCK = 128
} |
| Definition of acceptable file open modes. More...
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typedef request::offset_type | offset_type |
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typedef request::size_type | size_type |
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static const int | DEFAULT_QUEUE = -1 |
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static const int | NO_QUEUE = -2 |
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static const int | NO_ALLOCATOR = -1 |
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| ufs_file_base (const std::string &filename, int mode) |
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offset_type | _size () |
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void | close () |
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| file () |
| Initializes file object. More...
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void | add_zone (int &first_cyl, int last_cyl, int sec_per_track, int &first_sect) |
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mutex | fd_mutex |
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int | file_des |
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int | mode_ |
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const std::string | filename |
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int | nsurfaces |
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int | bytes_per_sector |
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double | cmd_ovh |
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double | seek_time |
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double | rot_latency |
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double | head_switch_time |
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double | cyl_switch_time |
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double | revolution_time |
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double | interface_speed |
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std::set< Zone, ZoneCmp > | zones |
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Implementation of disk emulation.
sim_disk_file::sim_disk_file |
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const std::string & |
filename, |
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int |
mode, |
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int |
queue_id = DEFAULT_QUEUE , |
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int |
allocator_id = NO_ALLOCATOR |
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) |
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inline |
constructs file object
- Parameters
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- Attention
- filename must be resided at memory disk partition
- Parameters
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mode | open mode, see stxxl::file::open_modes |
disk | disk(file) identifier |
const char* sim_disk_file::io_type |
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const |
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virtual |
Identifies the type of I/O implementation.
- Returns
- pointer to null terminated string of characters, containing the name of I/O implementation
Reimplemented from file.
void sim_disk_file::set_size |
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offset_type |
newsize | ) |
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virtual |
Changes the size of the file.
- Parameters
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Implements file.
The documentation for this class was generated from the following file: