Implementation of file based on new[] and memcpy.
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#include <mem_file.h>
List of all members.
Public Member Functions |
| mem_file (int queue_id=DEFAULT_QUEUE, int allocator_id=NO_ALLOCATOR) |
| constructs file object
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void | serve (const request *req) throw (io_error) |
offset_type | size () |
| Returns size of the file.
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void | set_size (offset_type newsize) |
| Changes the size of the file.
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void | lock () |
| Locks file for reading and writing (acquires a lock in the file system).
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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.
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const char * | io_type () const |
| Identifies the type of I/O implementation.
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Detailed Description
Implementation of file based on new[] and memcpy.
Constructor & Destructor Documentation
mem_file::mem_file |
( |
int |
queue_id = DEFAULT_QUEUE , |
|
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int |
allocator_id = NO_ALLOCATOR | |
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) |
| | [inline] |
constructs file object
- Parameters:
-
| disk | disk(file) identifier |
Member Function Documentation
void mem_file::discard |
( |
offset_type |
offset, |
|
|
offset_type |
size | |
|
) |
| | [virtual] |
Discard a region of the file (mark it unused) some specialized file types may need to know freed regions.
Reimplemented from file.
const char * mem_file::io_type |
( |
|
) |
const [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 mem_file::lock |
( |
|
) |
[virtual] |
Locks file for reading and writing (acquires a lock in the file system).
Implements file.
void mem_file::set_size |
( |
offset_type |
newsize |
) |
[virtual] |
Changes the size of the file.
- Parameters:
-
Implements file.
file::offset_type mem_file::size |
( |
|
) |
[virtual] |
Returns size of the file.
- Returns:
- file size in bytes
Implements file.
The documentation for this class was generated from the following files: