NAME

sc::ProcFileGrp - The ProcFileGrp concrete class provides an implementation of FileGrp for a single processor.

SYNOPSIS

#include <fileproc.h>

Inherits sc::FileGrp.

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.

Additional Inherited Members

Detailed Description

The ProcFileGrp concrete class provides an implementation of FileGrp for a single processor.

Member Function Documentation

ProcFileGrp * sc::ProcFileGrp::clone () [virtual]

Clones the given FileGrp. The new FileGrp may need to be initialized additionally.

Implements sc::FileGrp.

void * sc::ProcFileGrp::obtain_readonly (distsize_t offset, int size) [virtual]

This gives read access to the file location. No locking is done.

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.