1 //===-- llvm/LLVMContext.h - Class for managing "global" state --*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file declares LLVMContext, a container of "global" state in LLVM, such
11 // as the global type and constant uniquing tables.
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_LLVMCONTEXT_H
16 #define LLVM_LLVMCONTEXT_H
18 #include "llvm/Support/DataTypes.h"
28 class ConstantAggregateZero;
32 class ConstantPointerNull;
37 class LLVMContextImpl;
50 /// This is an important class for using LLVM in a threaded context. It
51 /// (opaquely) owns and manages the core "global" data of LLVM's core
52 /// infrastructure, including the type and constant uniquing tables.
53 /// LLVMContext itself provides no locking guarantees, so you should be careful
54 /// to have one context per thread.
56 LLVMContextImpl* pImpl;
62 /// FOR BACKWARDS COMPATIBILITY - Returns a global context.
63 extern LLVMContext& getGlobalContext();