#include <fileproc.h>
Inheritance diagram for sc::ProcFileGrp:
Public Member Functions | |
ProcFileGrp (const Ref< KeyVal > &) | |
ProcFileGrp * | clone () |
Clones the given FileGrp. The new FileGrp may need to be initialized additionally. | |
void | set_localsize (size_t) |
Set the size of locally held data. | |
void * | localdata () |
void * | obtain_readwrite (distsize_t offset, int size) |
Only one thread can have an unreleased obtain_readwrite at a time. | |
void * | obtain_readonly (distsize_t offset, int size) |
This gives read access to the file location. No locking is done. | |
void * | obtain_writeonly (distsize_t offset, int size) |
This gives write access to the data location. No locking is done. | |
void | release_readonly (void *data, distsize_t offset, int size) |
This is called when read access is no longer needed. | |
void | release_writeonly (void *data, distsize_t offset, int size) |
This is called when write access is no longer needed. | |
void | release_readwrite (void *data, distsize_t offset, int size) |
This is called when read/write access is no longer needed. | |
void | sync () |
Synchronizes all the nodes. |
void sc::ProcFileGrp::set_localsize | ( | size_t | ) | [virtual] |
Set the size of locally held data.
When data is accessed using a global offset counting starts at node 0 and proceeds up to node n() - 1.
Implements sc::FileGrp.
void* sc::ProcFileGrp::obtain_readwrite | ( | distsize_t | offset, | |
int | size | |||
) | [virtual] |
Only one thread can have an unreleased obtain_readwrite at a time.
The actual file region locked can be larger than that requested. If the file region is already locked this will block. For this reason, data should be held as read/write for as short a time as possible.
Implements sc::FileGrp.
void sc::ProcFileGrp::release_readwrite | ( | void * | data, | |
distsize_t | offset, | |||
int | size | |||
) | [virtual] |
This is called when read/write access is no longer needed.
The data will be unlocked.
Implements sc::FileGrp.
void sc::ProcFileGrp::sync | ( | ) | [virtual] |
Synchronizes all the nodes.
Consider using this when the way you you access data changes.
Implements sc::FileGrp.