diff options
Diffstat (limited to 'lib/Support/ManagedStatic.cpp')
-rw-r--r-- | lib/Support/ManagedStatic.cpp | 28 |
1 files changed, 5 insertions, 23 deletions
diff --git a/lib/Support/ManagedStatic.cpp b/lib/Support/ManagedStatic.cpp index ced2b13b3a..6a1c2a545a 100644 --- a/lib/Support/ManagedStatic.cpp +++ b/lib/Support/ManagedStatic.cpp @@ -14,36 +14,17 @@ #include "llvm/Support/ManagedStatic.h" #include "llvm/Config/config.h" #include "llvm/Support/Atomic.h" -#include "llvm/Support/MutexGuard.h" #include <cassert> -#include <mutex> using namespace llvm; static const ManagedStaticBase *StaticList = nullptr; -// ManagedStatics can get created during execution of static constructors. As a -// result, we cannot use a global static std::mutex object for the lock since it -// may not have been constructed. Instead, we do a call-once initialization of -// a pointer to a mutex. This also means that we must not "initialize" the -// mutex with nullptr, otherwise it might get reset to nullptr after being -// initialized by std::call_once. -static std::once_flag MutexInitializationFlag; -static std::recursive_mutex *ManagedStaticMutex; - -namespace { - void InitializeManagedStaticMutex() { - std::call_once(MutexInitializationFlag, - []() { ManagedStaticMutex = new std::recursive_mutex(); }); - } -} - void ManagedStaticBase::RegisterManagedStatic(void *(*Creator)(), void (*Deleter)(void*)) const { assert(Creator); if (llvm_is_multithreaded()) { - InitializeManagedStaticMutex(); + llvm_acquire_global_lock(); - std::lock_guard<std::recursive_mutex> Lock(*ManagedStaticMutex); if (!Ptr) { void* tmp = Creator(); @@ -62,6 +43,8 @@ void ManagedStaticBase::RegisterManagedStatic(void *(*Creator)(), Next = StaticList; StaticList = this; } + + llvm_release_global_lock(); } else { assert(!Ptr && !DeleterFn && !Next && "Partially initialized ManagedStatic!?"); @@ -92,9 +75,8 @@ void ManagedStaticBase::destroy() const { /// llvm_shutdown - Deallocate and destroy all ManagedStatic variables. void llvm::llvm_shutdown() { - InitializeManagedStaticMutex(); - std::lock_guard<std::recursive_mutex> Lock(*ManagedStaticMutex); - while (StaticList) StaticList->destroy(); + + if (llvm_is_multithreaded()) llvm_stop_multithreaded(); } |