MPQC
3.0.0-alpha
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The ProcFileGrp concrete class provides an implementation of FileGrp for a single processor. More...
#include <util/group/fileproc.h>
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. More... | |
void * | localdata () |
void * | obtain_readwrite (distsize_t offset, int size) |
Only one thread can have an unreleased obtain_readwrite at a time. More... | |
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. More... | |
void | sync () |
Synchronizes all the nodes. More... | |
Public Member Functions inherited from sc::FileGrp | |
FileGrp (const Ref< KeyVal > &) | |
void | open () |
Opens the files. | |
void | close () |
Closes the files. | |
void | set_filename (char *name) |
Sets the filename for the FileGrp. | |
const char * | get_filename () const |
Returns the filename for the FileGrp. | |
int | me () const |
Returns who I am. | |
int | n () const |
Returns how many nodes there are. | |
size_t | localsize () |
Returns the amount of data residing locally on me(). | |
distsize_t | localoffset () |
Returns the global offset to this node's data. | |
int | size (int node) |
Returns the amount of data residing on node. | |
distsize_t | offset (int node) |
Returns the global offset to node's data. | |
distsize_t | totalsize () |
Returns the sum of all data allocated on all nodes. | |
virtual void | activate () |
Activate is called before the data is to be used. | |
virtual void | deactivate () |
Deactivate is called after the data has been used. | |
virtual void | sum_reduction (double *data, distsize_t doffset, int dsize) |
virtual void | sum_reduction_on_node (double *data, size_t doffset, int dsize, int node=-1) |
virtual void | catchup () |
Processes outstanding requests. More... | |
virtual void | print (std::ostream &o=ExEnv::out0()) const |
Prints out information about the object. | |
Public Member Functions inherited from sc::DescribedClass | |
DescribedClass (const DescribedClass &) | |
DescribedClass & | operator= (const DescribedClass &) |
ClassDesc * | class_desc () const MPQC__NOEXCEPT |
This returns the unique pointer to the ClassDesc corresponding to the given type_info object. More... | |
const char * | class_name () const |
Return the name of the object's exact type. | |
int | class_version () const |
Return the version of the class. | |
Ref< DescribedClass > | ref () |
Return this object wrapped up in a Ref smart pointer. More... | |
Public Member Functions inherited from sc::RefCount | |
size_t | identifier () const |
Return the unique identifier for this object that can be compared for different objects of different types. More... | |
int | lock_ptr () const |
Lock this object. | |
int | unlock_ptr () const |
Unlock this object. | |
void | use_locks (bool inVal) |
start and stop using locks on this object | |
refcount_t | nreference () const |
Return the reference count. | |
refcount_t | reference () |
Increment the reference count and return the new count. | |
refcount_t | dereference () |
Decrement the reference count and return the new count. | |
int | managed () const |
void | unmanage () |
Turn off the reference counting mechanism for this object. More... | |
Additional Inherited Members | |
Static Public Member Functions inherited from sc::FileGrp | |
static FileGrp * | initial_filegrp (int &argc, char **argv) |
Create a file group. More... | |
static FileGrp * | initial_filegrp () |
static void | set_default_filegrp (const Ref< FileGrp > &) |
The default file group contains the primary file group to be used by an application. | |
static FileGrp * | get_default_filegrp () |
Returns the default file group. | |
Protected Member Functions inherited from sc::FileGrp | |
void | obtain_local_lock (size_t start, size_t fence) |
void | release_local_lock (size_t start, size_t fence) |
Protected Member Functions inherited from sc::RefCount | |
RefCount (const RefCount &) | |
RefCount & | operator= (const RefCount &) |
Protected Attributes inherited from sc::FileGrp | |
int | me_ |
int | n_ |
distsize_t * | offsets_ |
int | debug_ |
The ProcFileGrp concrete class provides an implementation of FileGrp for a single processor.
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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.
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virtual |
This is called when read/write access is no longer needed.
The data will be unlocked.
Implements sc::FileGrp.
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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.
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virtual |
Synchronizes all the nodes.
Consider using this when the way you you access data changes.
Implements sc::FileGrp.