net_instaweb::SharedMemLockManager Class Reference

namespace SharedMemLockData More...

#include "shared_mem_lock_manager.h"

Inheritance diagram for net_instaweb::SharedMemLockManager:

Public Member Functions
	SharedMemLockManager (AbstractSharedMem *shm, const GoogleString &path, Scheduler *scheduler, Hasher *hasher, MessageHandler *handler)
bool	Initialize ()
bool	Attach ()
virtual SchedulerBasedAbstractLock *	CreateNamedLock (const StringPiece &name)

Static Public Member Functions
static void	GlobalCleanup (AbstractSharedMem *shm, const GoogleString &path, MessageHandler *message_handler)

Friends
class	SharedMemLock

Detailed Description

namespace SharedMemLockData

A simple shared memory named locking manager, which uses scheduler alarms (via SchedulerBasedAbstractLock) when it needs to block.

Todo:

TODO(morlovich): Implement condvars?

Constructor & Destructor Documentation

net_instaweb::SharedMemLockManager::SharedMemLockManager	(	AbstractSharedMem *	shm,
		const GoogleString &	path,
		Scheduler *	scheduler,
		Hasher *	hasher,
		MessageHandler *	handler
	)

Note that you must call Initialize() in the root process, and Attach in child processes to finish the initialization.

Locks created by this object must not live after it dies.

Member Function Documentation

bool net_instaweb::SharedMemLockManager::Attach

(

)

Connects to already initialized state from a child process. Returns whether successful.

static void net_instaweb::SharedMemLockManager::GlobalCleanup ( AbstractSharedMem *  shm, const GoogleString &  path, MessageHandler *  message_handler  )

static

This should be called from the root process as it is about to exit, with the same value as were passed to the constructor of any instance on which Initialize() was called, except the message_handler may be different (if for example the original one is no longer available due to the cleanup sequence).

bool net_instaweb::SharedMemLockManager::Initialize

(

)

Sets up our shared state for use of all child processes. Returns whether successful.

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

• pagespeed/kernel/sharedmem/shared_mem_lock_manager.h