浏览MEF源代码时,我找到了这一段内容。请问为什么在锁内需要使用
整个方法如下:
MemoryBarrier
?整个方法如下:
public void SatisfyImportsOnce(ComposablePart part)
{
this.ThrowIfDisposed();
if (this._importEngine == null)
{
ImportEngine importEngine = new ImportEngine(this, this._compositionOptions);
lock(this._lock)
{
if (this._importEngine == null)
{
Thread.MemoryBarrier();
this._importEngine = importEngine;
importEngine = null;
}
}
if(importEngine != null)
{
importEngine.Dispose();
}
}
this._importEngine.SatisfyImportsOnce(part);
}