| //===-- ManagedStatic.cpp - Static Global wrapper -------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file implements the ManagedStatic class and llvm_shutdown(). |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/Support/ManagedStatic.h" |
| #include "llvm/Config/config.h" |
| #include "llvm/System/Atomic.h" |
| #include <cassert> |
| using namespace llvm; |
| |
| static const ManagedStaticBase *StaticList = 0; |
| |
| void ManagedStaticBase::RegisterManagedStatic(void *(*Creator)(), |
| void (*Deleter)(void*)) const { |
| if (llvm_is_multithreaded()) { |
| llvm_acquire_global_lock(); |
| |
| if (Ptr == 0) { |
| void* tmp = Creator ? Creator() : 0; |
| |
| sys::MemoryFence(); |
| Ptr = tmp; |
| DeleterFn = Deleter; |
| |
| // Add to list of managed statics. |
| Next = StaticList; |
| StaticList = this; |
| } |
| |
| llvm_release_global_lock(); |
| } else { |
| assert(Ptr == 0 && DeleterFn == 0 && Next == 0 && |
| "Partially initialized ManagedStatic!?"); |
| Ptr = Creator ? Creator() : 0; |
| DeleterFn = Deleter; |
| |
| // Add to list of managed statics. |
| Next = StaticList; |
| StaticList = this; |
| } |
| } |
| |
| void ManagedStaticBase::destroy() const { |
| assert(DeleterFn && "ManagedStatic not initialized correctly!"); |
| assert(StaticList == this && |
| "Not destroyed in reverse order of construction?"); |
| // Unlink from list. |
| StaticList = Next; |
| Next = 0; |
| |
| // Destroy memory. |
| DeleterFn(Ptr); |
| |
| // Cleanup. |
| Ptr = 0; |
| DeleterFn = 0; |
| } |
| |
| /// llvm_shutdown - Deallocate and destroy all ManagedStatic variables. |
| void llvm::llvm_shutdown() { |
| while (StaticList) |
| StaticList->destroy(); |
| |
| if (llvm_is_multithreaded()) llvm_stop_multithreaded(); |
| } |
| |