Implementation of file based on UNIX syscalls. More...
#include <syscall_file.h>
Inheritance diagram for syscall_file:
Collaboration diagram for syscall_file:
Public Member Functions | |
| syscall_file (const std::string &filename, int mode, int queue_id=DEFAULT_QUEUE, int allocator_id=NO_ALLOCATOR) | |
| constructs file object More... | |
| void | serve (const request *req) throw (io_error) |
| const char * | io_type () const |
| Identifies the type of I/O implementation. More... | |
 Public Member Functions inherited from ufs_file_base | |
| offset_type | size () |
| Returns size of the file. More... | |
| void | set_size (offset_type newsize) |
| Changes the size of the file. More... | |
| void | lock () |
| Locks file for reading and writing (acquires a lock in the file system) More... | |
| const char * | io_type () const |
| Identifies the type of I/O implementation. More... | |
| void | remove () |
| Public Member Functions inherited from file | |
| void | add_request_ref () |
| void | delete_request_ref () |
| int | get_request_nref () |
| virtual int | get_physical_device_id () const |
| 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... | |
| virtual void | export_files (offset_type offset, offset_type length, std::string prefix) |
| Public Member Functions inherited from disk_queued_file | |
| disk_queued_file (int queue_id, int allocator_id) | |
| 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... | |
| 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... | |
| virtual int | get_queue_id () const |
| Returns the identifier of the file's queue. More... | |
| virtual int | get_allocator_id () const |
| Returns the file's allocator. More... | |
Additional Inherited Members | |
| Public Types inherited from file | |
| 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... | |
| typedef request::offset_type | offset_type |
| typedef request::size_type | size_type |
| Static Public Attributes inherited from file | |
| static const int | DEFAULT_QUEUE = -1 |
| static const int | NO_QUEUE = -2 |
| static const int | NO_ALLOCATOR = -1 |
| Protected Member Functions inherited from ufs_file_base | |
| ufs_file_base (const std::string &filename, int mode) | |
| offset_type | _size () |
| void | close () |
| Protected Member Functions inherited from file | |
| file () | |
| Initializes file object. More... | |
| Protected Attributes inherited from ufs_file_base | |
| mutex | fd_mutex |
| int | file_des |
| int | mode_ |
| const std::string | filename |
Detailed Description
Implementation of file based on UNIX syscalls.
Constructor & Destructor Documentation
|
inline |
constructs file object
- Parameters
-
filename path of file
- Attention
- filename must be resided at memory disk partition
- Parameters
-
mode open mode, see stxxl::file::open_modesdisk disk(file) identifier
Member Function Documentation
|
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.
The documentation for this class was generated from the following files:
- syscall_file.h
- syscall_file.cpp
