net_instaweb::ThreadSystem::Condvar Class Reference

#include "condvar.h"

Inheritance diagram for net_instaweb::ThreadSystem::Condvar:

Public Member Functions
virtual CondvarCapableMutex *	mutex () const =0
	Return the mutex associated with this condition variable.
virtual void	Signal ()=0
virtual void	Broadcast ()=0
virtual void	Wait ()=0
virtual void	TimedWait (int64 timeout_ms)=0

Detailed Description

Abstract interface for implementing a condition variable layered on top of a given mutex type, which ought to extend CondvarCapableMutex.

Member Function Documentation

virtual void net_instaweb::ThreadSystem::Condvar::Broadcast ( )

pure virtual

Broadcast to all threads waiting on condvar. mutex() must be held as with Signal().

Implemented in net_instaweb::NullCondvar, and net_instaweb::PthreadCondvar.

virtual void net_instaweb::ThreadSystem::Condvar::Signal ( )

pure virtual

Signal the condvar, waking a waiting thread if any. mutex() must be held by caller. Example: { ScopedMutex lock(cv.mutex()); make_resource_available(); cv.Signal(); }

Implemented in net_instaweb::NullCondvar, and net_instaweb::PthreadCondvar.

virtual void net_instaweb::ThreadSystem::Condvar::TimedWait ( int64  timeout_ms )

pure virtual

Wait for condition to be signaled, or timeout to occur. Works like Wait(), and cv.mutex() must be held on entry and re-taken on exit.

Implemented in net_instaweb::NullCondvar, and net_instaweb::PthreadCondvar.

virtual void net_instaweb::ThreadSystem::Condvar::Wait ( )

pure virtual

Wait for condition to be signaled. mutex() must be held; it will be released and then reclaimed when a signal is received. Note that a Wait() may be terminated based on a condition being true, but the condition may no longer be true at the time the thread wakes up. Example: { ScopedMutex lock(cv.mutex()); while (status && !resource_available()) status = cv.wait(); if (status) { use_resource(); } }

Implemented in net_instaweb::NullCondvar, and net_instaweb::PthreadCondvar.

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

• pagespeed/kernel/base/condvar.h