LockedPageManager Class Reference

Singleton class to keep track of locked (ie, non-swappable) memory pages, for use in std::allocator templates. More...

#include <allocators.h>

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Static Public Member Functions
static LockedPageManager &	Instance ()

Private Member Functions
	LockedPageManager ()

Static Private Member Functions
static void	CreateInstance ()

Static Private Attributes
static LockedPageManager *	_instance = NULL
static boost::once_flag	init_flag = BOOST_ONCE_INIT

Additional Inherited Members
Public Member Functions inherited from LockedPageManagerBase< MemoryPageLocker >
	LockedPageManagerBase (size_t page_size)
	~LockedPageManagerBase ()
void	LockRange (void *p, size_t size)
void	UnlockRange (void *p, size_t size)
int	GetLockedPageCount ()

Detailed Description

Singleton class to keep track of locked (ie, non-swappable) memory pages, for use in std::allocator templates.

Some implementations of the STL allocate memory in some constructors (i.e., see MSVC's vector<T> implementation where it allocates 1 byte of memory in the allocator.) Due to the unpredictable order of static initializers, we have to make sure the LockedPageManager instance exists before any other STL-based objects that use secure_allocator are created. So instead of having LockedPageManager also be static-intialized, it is created on demand.

Definition at line 136 of file allocators.h.

Constructor & Destructor Documentation

LockedPageManager::LockedPageManager ( )

private

Definition at line 64 of file allocators.cpp.

Member Function Documentation

static void LockedPageManager::CreateInstance ( )

inlinestaticprivate

Definition at line 148 of file allocators.h.

References _instance.

Referenced by Instance().

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static LockedPageManager& LockedPageManager::Instance ( )

inlinestatic

Definition at line 139 of file allocators.h.

References _instance, CreateInstance(), and init_flag.

Referenced by secure_allocator< T >::allocate(), CCrypter::CCrypter(), secure_allocator< T >::deallocate(), LockObject(), UnlockObject(), and CCrypter::~CCrypter().

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Member Data Documentation

LockedPageManager * LockedPageManager::_instance = NULL

staticprivate

Definition at line 159 of file allocators.h.

Referenced by CreateInstance(), and Instance().

boost::once_flag LockedPageManager::init_flag = BOOST_ONCE_INIT

staticprivate

Definition at line 160 of file allocators.h.

Referenced by Instance().

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

• src/allocators.h
• src/allocators.cpp