Class SharedMemorySync

java.lang.Object

com.oracle.truffle.js.builtins.helper.SharedMemorySync

public final class SharedMemorySync
extends Object

Implementation of the synchronization primitives of ECMA2017 Shared Memory model.

Method Summary

Modifier and Type	Method	Description
static void	addWaiter(JSAgent agent, JSAgentWaiterList.JSAgentWaiterListEntry wl, JSAgentWaiterList.WaiterRecord waiterRecord, boolean isAsync)
static boolean	compareAndSetBigInt(JSTypedArrayObject target, int intArrayOffset, BigInt expected, BigInt replacement, TypedArray.TypedBigIntArray typedArray)
static boolean	compareAndSetInt(JSTypedArrayObject target, int intArrayOffset, int expected, int replacement, TypedArray.TypedIntArray typedArray)
static int	doVolatileGet(JSTypedArrayObject target, int intArrayOffset, TypedArray.TypedIntArray typedArray)
static BigInt	doVolatileGetBigInt(JSTypedArrayObject target, int intArrayOffset, TypedArray.TypedBigIntArray typedArray)
static void	doVolatilePut(JSTypedArrayObject target, int index, int value, TypedArray.TypedIntArray typedArray)
static void	doVolatilePutBigInt(JSTypedArrayObject target, int index, BigInt value, TypedArray.TypedBigIntArray typedArray)
static JSAgentWaiterList.JSAgentWaiterListEntry	getWaiterList(JSContext context, JSDynamicObject target, int indexPos)
static void	removeWaiter(JSAgentWaiterList.JSAgentWaiterListEntry wl, JSAgentWaiterList.WaiterRecord w)
static JSAgentWaiterList.WaiterRecord[]	removeWaiters(JSAgentWaiterList.JSAgentWaiterListEntry wl, int count)
static boolean	suspendAgent(JSAgent agent, JSAgentWaiterList.JSAgentWaiterListEntry wl, JSAgentWaiterList.WaiterRecord waiterRecord)	SuspendAgent (WL, W, timeout).
static void	wakeWaiters(JSAgentWaiterList.JSAgentWaiterListEntry wl)	Wakes waiting agents on the WaiterList, since at least one of them should be notified.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

doVolatileGet

public static int doVolatileGet(JSTypedArrayObject target,
 int intArrayOffset,
 TypedArray.TypedIntArray typedArray)

doVolatileGetBigInt

public static BigInt doVolatileGetBigInt(JSTypedArrayObject target,
 int intArrayOffset,
 TypedArray.TypedBigIntArray typedArray)

doVolatilePut

public static void doVolatilePut(JSTypedArrayObject target,
 int index,
 int value,
 TypedArray.TypedIntArray typedArray)

doVolatilePutBigInt

public static void doVolatilePutBigInt(JSTypedArrayObject target,
 int index,
 BigInt value,
 TypedArray.TypedBigIntArray typedArray)

compareAndSetInt

public static boolean compareAndSetInt(JSTypedArrayObject target,
 int intArrayOffset,
 int expected,
 int replacement,
 TypedArray.TypedIntArray typedArray)

compareAndSetBigInt

public static boolean compareAndSetBigInt(JSTypedArrayObject target,
 int intArrayOffset,
 BigInt expected,
 BigInt replacement,
 TypedArray.TypedBigIntArray typedArray)

getWaiterList

public static JSAgentWaiterList.JSAgentWaiterListEntry getWaiterList(JSContext context,
 JSDynamicObject target,
 int indexPos)

addWaiter

public static void addWaiter(JSAgent agent,
 JSAgentWaiterList.JSAgentWaiterListEntry wl,
 JSAgentWaiterList.WaiterRecord waiterRecord,
 boolean isAsync)

removeWaiter

public static void removeWaiter(JSAgentWaiterList.JSAgentWaiterListEntry wl,
 JSAgentWaiterList.WaiterRecord w)

suspendAgent

public static boolean suspendAgent(JSAgent agent,
 JSAgentWaiterList.JSAgentWaiterListEntry wl,
 JSAgentWaiterList.WaiterRecord waiterRecord)

SuspendAgent (WL, W, timeout). Suspends (blocks) this agent, awaiting a notification via this WaiterList.

Returns:

true if agent W was notified by another agent; false if timed out.

wakeWaiters

public static void wakeWaiters(JSAgentWaiterList.JSAgentWaiterListEntry wl)

Wakes waiting agents on the WaiterList, since at least one of them should be notified.

removeWaiters

public static JSAgentWaiterList.WaiterRecord[] removeWaiters(JSAgentWaiterList.JSAgentWaiterListEntry wl,
 int count)