/// <summary>
/// 获取数据缓冲区
/// </summary>
/// <param name="size"></param>
/// <returns></returns>
internal static Buffer GetBuffer(int size)
{
if (size > (int)BufferSize)
{
return(new Buffer(size));
}
Buffer buffer;
bufferCountLock.EnterYield();
try
{
buffer = bufferCount.get(size);
}
finally { bufferCountLock.Exit(); }
if (buffer == null)
{
byte step = 0xff;
BufferCount newBufferCount = null, oldBufferCount;
Monitor.Enter(newBufferCountLock);
oldBufferCount = bufferCount;
try
{
bufferCountLock.EnterYield();
step = 0;
buffer = oldBufferCount.get(size);
bufferCountLock.Exit();
step = 0xff;
if (buffer == null)
{
newBufferCount = new BufferCount();
step = 1;
buffer = newBufferCount.get(size);
if (newBufferCount.Size > oldBufferCount.Size)
{
step = 0xff;
bufferCount = newBufferCount;
oldBufferCount.Free();
}
}
}
finally
{
switch (step)
{
case 0: bufferCountLock.Exit(); break;
case 1: newBufferCount.Free(); break;
}
Monitor.Exit(newBufferCountLock);
}
}
return(buffer);
}
/// <summary>
/// 获取数据缓冲区
/// </summary>
/// <param name="size"></param>
/// <returns></returns>
internal static Buffer GetBuffer(int size)
{
if (size > (int)BufferSize) return new Buffer(size);
Buffer buffer;
while (System.Threading.Interlocked.CompareExchange(ref bufferCountLock, 1, 0) != 0) AutoCSer.Threading.ThreadYield.Yield(AutoCSer.Threading.ThreadYield.Type.CacheServerGetBuffer);
try
{
buffer = bufferCount.get(size);
}
finally { System.Threading.Interlocked.Exchange(ref bufferCountLock, 0); }
if (buffer == null)
{
byte step = 0xff;
BufferCount newBufferCount = null, oldBufferCount;
Monitor.Enter(newBufferCountLock);
oldBufferCount = bufferCount;
try
{
while (System.Threading.Interlocked.CompareExchange(ref bufferCountLock, 1, 0) != 0) AutoCSer.Threading.ThreadYield.Yield(AutoCSer.Threading.ThreadYield.Type.CacheServerGetBuffer);
step = 0;
buffer = oldBufferCount.get(size);
System.Threading.Interlocked.Exchange(ref bufferCountLock, 0);
step = 0xff;
if (buffer == null)
{
newBufferCount = new BufferCount();
step = 1;
buffer = newBufferCount.get(size);
if (newBufferCount.Size > oldBufferCount.Size)
{
step = 0xff;
bufferCount = newBufferCount;
oldBufferCount.Free();
}
}
}
finally
{
switch (step)
{
case 0: System.Threading.Interlocked.Exchange(ref bufferCountLock, 0); break;
case 1: newBufferCount.Free(); break;
}
Monitor.Exit(newBufferCountLock);
}
}
return buffer;
}
