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# sc::MTMPIMemoryGrp Class Reference

This MemoryGrp class requires a MT-safe MPI implementation. More...

`#include <memmtmpi.h>`

Inheritance diagram for sc::MTMPIMemoryGrp:

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Collaboration diagram for sc::MTMPIMemoryGrp:

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List of all members.

## Public Methods
| MTMPIMemoryGrp (const Ref< MessageGrp > &msg, const Ref< ThreadGrp > &th, MPI_Comm comm=MPI_COMM_WORLD)
| Construct a MTMPIMemoryGrp given a MessageGrp, ThreadGrp, and an MPI communicator. More...
| MTMPIMemoryGrp (const Ref< KeyVal > &)
| Construct a MTMPIMemoryGrp given a KeyVal input object. More...
| ~MTMPIMemoryGrp ()
void | activate ()
| Activate is called before the memory is to be used.
void | deactivate ()
| Deactivate is called after the memory has been used.
void | sync ()
| Synchronizes all the nodes. More...
## Friends
class | MTMPIThread

## Detailed Description

This MemoryGrp class requires a MT-safe MPI implementation.

The default MessageGrp must be a MPIMessageGrp. MPI must be safe with respect to the default ThreadGrp. Alternately, a MessageGrp and a ThreadGrp can be passed to the constructor.

## Constructor & Destructor Documentation

sc::MTMPIMemoryGrp::MTMPIMemoryGrp | ( | const Ref< MessageGrp > & | msg,
|  | const Ref< ThreadGrp > & | th,
|  | MPI_Comm | comm = MPI_COMM_WORLD
| ) |

| Construct a MTMPIMemoryGrp given a MessageGrp, ThreadGrp, and an MPI communicator. The communicator can be a subset of MPI_COMM_WORLD, in which case, the MessageGrp must refer to the same subset.

sc::MTMPIMemoryGrp::MTMPIMemoryGrp | ( | const Ref< KeyVal > & |  | ) |

| Construct a MTMPIMemoryGrp given a KeyVal input object. A fully thread safe MPI is needed (MPI_THREAD_MULTIPLE).

## Member Function Documentation

void sc::MTMPIMemoryGrp::sync | ( |  | ) | `[virtual]`

| Synchronizes all the nodes. Consider using this when the way you you access memory changes. Reimplemented from sc::MsgMemoryGrp.

The documentation for this class was generated from the following file:

- memmtmpi.h