xrpl::spinlock< T > Class Template Reference

A spinlock implemented on top of an atomic integer. More...

#include <spinlock.h>

Public Member Functions
	spinlock (spinlock const &)=delete
spinlock &	operator= (spinlock const &)=delete
	spinlock (std::atomic< T > &lock)
	Grabs the.
bool	try_lock ()
void	lock ()
void	unlock ()

Private Attributes
std::atomic< T > &	lock_

Detailed Description

template<class T>
class xrpl::spinlock< T >

A spinlock implemented on top of an atomic integer.

Note

Using packed_spinlock and spinlock against the same underlying atomic integer can result in spinlock not being able to actually acquire the lock during periods of high contention, because of how the two locks operate: spinlock will spin trying to grab all the bits at once, whereas any given packed_spinlock will only try to grab one bit at a time. Caveat emptor.

This class meets the requirements of Lockable: https://en.cppreference.com/w/cpp/named_req/Lockable

Definition at line 147 of file spinlock.h.

Constructor & Destructor Documentation

spinlock() [1/2]

template<class T >

xrpl::spinlock< T >::spinlock ( spinlock< T > const &  )

delete

spinlock() [2/2]

template<class T >

xrpl::spinlock< T >::spinlock

(

std::atomic< T > &

lock

)

Grabs the.

Parameters

lock	The atomic integer to spin against.

Note

For performance reasons, you should strive to have lock be on a cacheline by itself.

Definition at line 167 of file spinlock.h.

Member Function Documentation

operator=()

template<class T >

spinlock & xrpl::spinlock< T >::operator= ( spinlock< T > const &  )

delete

try_lock()

template<class T >

bool xrpl::spinlock< T >::try_lock

(

)

Definition at line 172 of file spinlock.h.

lock()

template<class T >

void xrpl::spinlock< T >::lock

(

)

Definition at line 181 of file spinlock.h.

unlock()

template<class T >

void xrpl::spinlock< T >::unlock

(

)

Definition at line 195 of file spinlock.h.

Member Data Documentation

lock_

template<class T >

std::atomic<T>& xrpl::spinlock< T >::lock_

private

Definition at line 153 of file spinlock.h.