donner::svg::DocumentAccessLock Class Reference

Lightweight reader/writer gate for document access. More...

#include "donner/svg/DocumentState.h"

Public Member Functions
void	lockRead ()
	Acquire shared read access.
bool	tryLockRead ()
	Attempt to acquire shared read access without waiting for a writer.
void	unlockRead ()
	Release shared read access.
void	lockWrite () DONNER_NO_THREAD_SAFETY_ANALYSIS
	Acquire exclusive write access.
bool	tryLockWrite () DONNER_NO_THREAD_SAFETY_ANALYSIS
	Try to acquire exclusive write access without waiting.
bool	tryUpgradeReadToWrite () DONNER_NO_THREAD_SAFETY_ANALYSIS
	Try to atomically convert the calling thread's sole read lock to a write lock.
void	downgradeWriteToRead () DONNER_NO_THREAD_SAFETY_ANALYSIS
	Atomically convert the calling thread's write lock to a read lock.
void	unlockWrite () DONNER_NO_THREAD_SAFETY_ANALYSIS
	Release exclusive write access.

Detailed Description

Lightweight reader/writer gate for document access.

Member Function Documentation

tryUpgradeReadToWrite()

bool donner::svg::DocumentAccessLock::tryUpgradeReadToWrite ( )

inlinenodiscard

Try to atomically convert the calling thread's sole read lock to a write lock.

This operation never waits. On failure, the caller retains its read lock unchanged.

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

• donner/svg/DocumentState.h