Files
swift-mirror/stdlib/runtime/GlobalObjects.cpp
Dave Abrahams eac8ca27f9 [stdlib] Use a universal empty array buffer
NFC, and no significant performance change expected.  This is part one
of a move to eliminate nil checks from the array implementation.

Swift SVN r22526
2014-10-05 17:55:11 +00:00

43 lines
1.4 KiB
C++

//===--- GlobalObjects.cpp - Statically-initialized objects ---------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See http://swift.org/LICENSE.txt for license information
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
//
// Objects that are allocated at global scope instead of on the heap,
// and statically initialized to avoid synchronization costs, are
// defined here.
//
//===----------------------------------------------------------------------===//
#include "../shims/GlobalObjects.h"
#include "swift/Runtime/FastEntryPoints.h"
#include "swift/Runtime/Metadata.h"
namespace swift {
// _direct type metadata for Swift._EmptyArrayStorage
extern "C" FullMetadata<ClassMetadata> _TMdCSs18_EmptyArrayStorage;
extern "C" _SwiftEmptyArrayStorage _swiftEmptyArrayStorage = {
// HeapObject header;
{
&_TMdCSs18_EmptyArrayStorage, // is-a pointer
RC_INTERVAL, // refcount
WRC_INTERVAL // weak refcount
},
// _SwiftArrayBodyStorage body;
{
0, // int count;
1 // unsigned int _capacityAndFlags; 1 means elementTypeIsBridgedVerbatim
}
};
}