/// <summary>
/// Sets the value of the <see cref="Value"/> property using a function that will not be
/// evaluated until either the <see cref="Value"/> property is accessed (the getter), or the
/// <see cref="LockValue"/> method is called.
/// </summary>
/// <param name="getValue">
/// A function whose return value is used to set the <see cref="Value"/> property.
/// </param>
public void SetValue(Func <T> getValue)
{
// If at any time _lockedInstance has a value, exit the loop.
while (_lockedInstance == null)
{
// Synchronize with the GetValue method - only one thread can have the lock at any one time.
if (_softLock.TryAcquire())
{
HasDefaultValue = (getValue == _getDefaultValue);
// If no other calls to SetValue are made, then getValue will be the value factory
// for _lockedInstance.
_potentialInstance = new Lazy <T>(getValue);
// Be sure to release the lock to allow other threads (and this thread later on) to
// set _potentialInstance.
_softLock.Release();
// Return from the method - our job is done and it might be a while until _lockedInstance has a value.
return;
}
}
throw new InvalidOperationException("Setting the value of a Semimutable object is not permitted after it has been locked.");
}
public void TryAcquireTest3()
{
var softlock = new SoftLock();
softlock.TryAcquire();
softlock.TryAcquire().Should().BeFalse();
}
public void TryAcquireTest3()
{
var softLock = new SoftLock();
softLock.TryAcquire();
Assert.IsTrue(softLock.IsLockAcquired);
}
public void IsLockAcquired_WillReturnTrue_WhenPriorLockHasBeenAcquired()
{
var softlock = new SoftLock();
// This will set the lock to true
softlock.TryAcquire();
softlock.IsLockAcquired.Should().BeTrue();
}
public void TryAcquireTest1()
{
var softlock = new SoftLock();
// Prove that the lock is not acquired initially
softlock.IsLockAcquired.Should().BeFalse();
// This will set the lock to true
softlock.TryAcquire();
softlock.IsLockAcquired.Should().BeTrue();
}
public void TryAcquireTest1()
{
var softLock = new SoftLock();
// Prove that the lock is not acquired initially
Assert.IsFalse(softLock.IsLockAcquired);
// This will set the lock to true
softLock.TryAcquire();
Assert.IsTrue(softLock.IsLockAcquired);
}
public void ReleaseTest()
{
var softlock = new SoftLock();
softlock.TryAcquire();
// prove it is locked
softlock.IsLockAcquired.Should().BeTrue("If this failed we have issues in TryAcquire");
softlock.Release();
// verify it has been released
softlock.IsLockAcquired.Should().BeFalse();
}
/// <summary>
/// Sets the value of the <see cref="Value"/> property using a function that will not be
/// evaluated until either the <see cref="Value"/> property is accessed (the getter), or the
/// <see cref="LockValue"/> method is called.
/// </summary>
/// <param name="getValue">
/// A function whose return value is used to set the <see cref="Value"/> property.
/// </param>
public void SetValue(Func <T> getValue)
{
// If at any time _lockedInstance has a value, exit the loop.
while (_lockedInstance == null)
{
// Synchronize with the GetValue method - only one thread can have the lock at any one time.
if (_softLock.TryAcquire())
{
HasDefaultValue = (getValue == _getDefaultValue);
// If no other calls to SetValue are made, then getValue will be the value factory
// for _lockedInstance.
_potentialInstance = new Lazy <T>(getValue);
// Be sure to release the lock to allow other threads (and this thread later on) to
// set _potentialInstance.
_softLock.Release();
// Break out of the loop - our job is done and it might be a while until _lockedInstance has a value.
break;
}
}
}
public void ReleaseTest()
{
var softLock = new SoftLock();
softLock.TryAcquire();
// prove it is locked
Assert.IsTrue(softLock.IsLockAcquired, "If this failed we have issues in TryAcquire");
softLock.Release();
// verify it has been released
Assert.IsFalse(softLock.IsLockAcquired);
}
public void TryAcquireTest2()
{
var softlock = new SoftLock();
softlock.TryAcquire().Should().BeTrue();
}