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corelinux::Memory Class Reference

Memory is high speed transient storage managed by the operating system, for both itself and user processes, used to store data and programs. More...

#include <Memory.hpp>

Inheritance diagram for corelinux::Memory::

corelinux::Synchronized List of all members.

Public Methods

 Memory (void) throw ( Assertion )
 Default constructor.

virtual ~Memory (void)
 Virtual Destructor.


Static Public Methods

MemoryStoragePtr createStorage (Size aByteSize, Int Rights=OWNER_ALL) throw ( StorageException )
 Default create method, creates a private block of read write shared memory of size aByteSize, sharing attributes default to owner. More...

MemoryStoragePtr createStorage (MemoryIdentifierCref aIdentifier, Size aByteSize, CreateDisposition disp=CREATE_OR_REUSE, Int Rights=OWNER_ALL, AddressingConstraint addressing=READ_WRITE)
 Create method, creates or opens a specifically identified block of shared memory of size aByteSize, sharing attributes default to owner. More...

MemoryStoragePtr createStorage (CharCptr aName, Size aByteSize, CreateDisposition disp=CREATE_OR_REUSE, Int Rights=OWNER_ALL, AddressingConstraint addressing=READ_WRITE)
 Create method, creates or opens a specifically identified block of shared memory of size aByteSize, sharing attributes default to owner. More...

void destroyStorage (MemoryStoragePtr)
 Destroy a previously allocated storage block. More...


Protected Methods

 Memory (MemoryCref) throw ( Assertion )
 Copy constructor prohibited.

MemoryRef operator= (MemoryCref) throw ( Assertion )
 Assignment operator prohibited.

bool operator== (MemoryCref) const
 Equality always returns false.


Static Protected Attributes

MemoryManager theMemoryManager
 The singleton instance of Memory for synchronization.


Detailed Description

Memory is high speed transient storage managed by the operating system, for both itself and user processes, used to store data and programs.

Upon allocation request, the operating system provides user processes with a memory storage region that is in addition to the current memory resources (stack, program, data) of the process. The memory can be made visible to all processes in the system, a select few, or just to the process that requested the storage. If made visible to other processes, memory provides a fast and efficient way to transfer information between the processes, and in this manner can be catagorized as high speed interprocess communication. It is up to the processes that share this memory area to agree on a synchronization protocol. The operating system allows a process to "mark" a memory region attribute as:


Member Function Documentation

MemoryStoragePtr corelinux::Memory::createStorage CharCptr    aName,
Size    aByteSize,
CreateDisposition    disp = CREATE_OR_REUSE,
Int    aRights = OWNER_ALL,
AddressingConstraint    addressing = READ_WRITE
[static]
 

Create method, creates or opens a specifically identified block of shared memory of size aByteSize, sharing attributes default to owner.

Parameters:
string  name of shared memory storage.
Size  number of bytes to allocate
Int  rights specificed
Returns:
MemoryStorage pointer

MemoryStoragePtr corelinux::Memory::createStorage MemoryIdentifierCref    aId,
Size    aByteSize,
CreateDisposition    disp = CREATE_OR_REUSE,
Int    aRights = OWNER_ALL,
AddressingConstraint    addressing = READ_WRITE
[static]
 

Create method, creates or opens a specifically identified block of shared memory of size aByteSize, sharing attributes default to owner.

Parameters:
MemoryIdentifier  reference to identifier.
Size  number of bytes to allocate
Int  rights specificed
Returns:
MemoryStorage pointer

MemoryStoragePtr corelinux::Memory::createStorage Size    aByteSize,
Int    aPermission = OWNER_ALL
throw ( StorageException ) [static]
 

Default create method, creates a private block of read write shared memory of size aByteSize, sharing attributes default to owner.

Parameters:
Size  number of bytes to allocate
Int  rights specificed
Returns:
MemoryStorage pointer

void corelinux::Memory::destroyStorage MemoryStoragePtr    aMPtr [static]
 

Destroy a previously allocated storage block.

Parameters:
MemoryStorage  pointer to storage object


The documentation for this class was generated from the following files:
This is the CoreLinux++ reference manual
Provided by The CoreLinux Consortium