isc::dhcp::ResourceHandler4 Class Reference

Resource race avoidance RAII handler for DHCPv4. More...

#include <resource_handler.h>

Inheritance diagram for isc::dhcp::ResourceHandler4:

Public Member Functions
virtual	~ResourceHandler4 ()
	Destructor.
bool	isLocked4 (const asiolink::IOAddress &addr)
	Checks if a resource is owned by this handler.
bool	tryLock4 (const asiolink::IOAddress &addr)
	Tries to acquires a resource.
void	unLock4 (const asiolink::IOAddress &addr)
	Releases a resource.
Public Member Functions inherited from isc::dhcp::ResourceHandler
	ResourceHandler ()
	Constructor.
virtual	~ResourceHandler ()
	Destructor.
bool	isLocked (Lease::Type type, const asiolink::IOAddress &addr)
	Checks if a resource is owned by this handler.
bool	tryLock (Lease::Type type, const asiolink::IOAddress &addr)
	Tries to acquires a resource.
void	unLock (Lease::Type type, const asiolink::IOAddress &addr)
	Releases a resource.

Detailed Description

Resource race avoidance RAII handler for DHCPv4.

Definition at line 179 of file resource_handler.h.

Constructor & Destructor Documentation

~ResourceHandler4()

virtual isc::dhcp::ResourceHandler4::~ResourceHandler4 ( )

inlinevirtual

Destructor.

Releases owned resources.

Definition at line 185 of file resource_handler.h.

Member Function Documentation

isLocked4()

bool isc::dhcp::ResourceHandler4::isLocked4 ( const asiolink::IOAddress &  addr )

inline

Checks if a resource is owned by this handler.

Parameters

addr	The address aka the resource.

Returns

true if this handler owns the resource, false otherwise.

Definition at line 203 of file resource_handler.h.

References isc::dhcp::ResourceHandler::isLocked(), and isc::dhcp::Lease::TYPE_V4.

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tryLock4()

bool isc::dhcp::ResourceHandler4::tryLock4 ( const asiolink::IOAddress &  addr )

inline

Tries to acquires a resource.

Lookup the resource, if not found insert the resource in the resource container and return true, if found return false

Parameters

addr	The address aka the resource.

Returns

true if the resource was acquired, false if the resource is busy i.e. owned by a handler.

Definition at line 195 of file resource_handler.h.

References isc::dhcp::ResourceHandler::tryLock(), and isc::dhcp::Lease::TYPE_V4.

Referenced by isc::lease_cmds::LeaseCmdsImpl::lease4UpdateHandler(), isc::lease_cmds::LeaseCmdsImpl::leaseAddHandler(), and isc::dhcp::Dhcpv4Srv::serverDecline().

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unLock4()

void isc::dhcp::ResourceHandler4::unLock4 ( const asiolink::IOAddress &  addr )

inline

Releases a resource.

Remove the resource from the resource container.

Parameters

addr	The address aka the resource.

Exceptions

when	we do not own the resource.

Definition at line 213 of file resource_handler.h.

References isc::dhcp::Lease::TYPE_V4, and isc::dhcp::ResourceHandler::unLock().

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

• resource_handler.h