public virtual void Dispose()
{
if (_disposed)
{
return;
}
Reset();
_objectJsonParser.Dispose();
_documentBuilder.Dispose();
_arenaAllocator.Dispose();
_arenaAllocatorForLongLivedValues?.Dispose();
if (_managedBuffers != null)
{
foreach (var managedPinnedBuffer in _managedBuffers)
{
managedPinnedBuffer.Dispose();
}
_managedBuffers = null;
}
if (_pinnedObjects != null)
{
foreach (var pinnedObject in _pinnedObjects)
{
pinnedObject.Free();
}
}
_disposed = true;
}
public JsonOperationContext(int initialSize, int longLivedSize, SharedMultipleUseFlag lowMemoryFlag)
{
Debug.Assert(lowMemoryFlag != null);
_disposeOnceRunner = new DisposeOnce <ExceptionRetry>(() =>
{
#if MEM_GUARD_STACK
ElectricFencedMemory.DecrementConext();
ElectricFencedMemory.UnRegisterContextAllocation(this);
#endif
Reset(true);
_documentBuilder.Dispose();
_arenaAllocator.Dispose();
_arenaAllocatorForLongLivedValues?.Dispose();
if (_managedBuffers != null)
{
foreach (var managedPinnedBuffer in _managedBuffers)
{
managedPinnedBuffer.Dispose();
}
_managedBuffers = null;
}
if (_pinnedObjects != null)
{
foreach (var pinnedObject in _pinnedObjects)
{
pinnedObject.Free();
}
_pinnedObjects = null;
}
});
_initialSize = initialSize;
_longLivedSize = longLivedSize;
_arenaAllocator = new ArenaMemoryAllocator(lowMemoryFlag, initialSize);
_arenaAllocatorForLongLivedValues = new ArenaMemoryAllocator(lowMemoryFlag, longLivedSize);
CachedProperties = new CachedProperties(this);
_jsonParserState = new JsonParserState();
_objectJsonParser = new ObjectJsonParser(_jsonParserState, this);
_documentBuilder = new BlittableJsonDocumentBuilder(this, _jsonParserState, _objectJsonParser);
LowMemoryFlag = lowMemoryFlag;
#if MEM_GUARD_STACK
ElectricFencedMemory.IncrementConext();
ElectricFencedMemory.RegisterContextAllocation(this, Environment.StackTrace);
#endif
}
public override void Dispose()
{
if (_disposed)
{
return;
}
lock (this)
{
if (_disposed)
{
return;
}
#if MEM_GUARD_STACK
ElectricFencedMemory.DecrementConext();
ElectricFencedMemory.UnRegisterContextAllocation(this);
#endif
Reset(true);
_documentBuilder.Dispose();
_arenaAllocator.Dispose();
_arenaAllocatorForLongLivedValues?.Dispose();
if (_managedBuffers != null)
{
foreach (var managedPinnedBuffer in _managedBuffers)
{
managedPinnedBuffer.Dispose();
}
_managedBuffers = null;
}
if (_pinnedObjects != null)
{
foreach (var pinnedObject in _pinnedObjects)
{
pinnedObject.Free();
}
}
_disposed = true;
}
}
protected internal virtual unsafe void Reset()
{
if (_tempBuffer != null)
{
_arenaAllocator.Return(_tempBuffer);
_tempBuffer.Address = null;
}
foreach (var builder in _liveReaders)
{
builder.DisposeTrackingReference = null;
builder.Dispose();
}
_liveReaders.Clear();
_arenaAllocator.ResetArena();
_documentBuilder.Reset();
if (_tempBuffer != null)
{
GetNativeTempBuffer(_tempBuffer.SizeInBytes);
}
// We don't reset _arenaAllocatorForLongLivedValues. It's used as a cache buffer for long lived strings like field names.
// When a context is re-used, the buffer containing those field names was not reset and the strings are still valid and alive.
if (_arenaAllocatorForLongLivedValues.Allocated > _initialSize)
{
// at this point, the long lived section is far too large, this is something that can happen
// if we have dynamic properties. A back of the envelope calculation gives us roughly 32K
// property names before this kicks in, which is a true abuse of the system. In this case,
// in order to avoid unlimited growth, we'll reset the long lived section
_arenaAllocatorForLongLivedValues.Dispose();
_arenaAllocatorForLongLivedValues = null;
_fieldNames.Clear();
CachedProperties = null; // need to release this so can be collected
}
}
