[Support] Replace sys::Mutex with their standard equivalents.

Only use a recursive mutex if it can be locked recursively.

llvm-svn: 369295

1 files changed, 5 insertions, 6 deletions

diff --git a/llvm/lib/Support/ManagedStatic.cpp b/llvm/lib/Support/ManagedStatic.cpp
index c51ef96..053493f 100644
--- a/llvm/lib/Support/ManagedStatic.cpp
+++ b/llvm/lib/Support/ManagedStatic.cpp
@@ -12,21 +12,20 @@
 
 #include "llvm/Support/ManagedStatic.h"
 #include "llvm/Config/config.h"
-#include "llvm/Support/Mutex.h"
 #include "llvm/Support/Threading.h"
 #include <cassert>
 #include <mutex>
 using namespace llvm;
 
 static const ManagedStaticBase *StaticList = nullptr;
-static sys::Mutex *ManagedStaticMutex = nullptr;
+static std::recursive_mutex *ManagedStaticMutex = nullptr;
 static llvm::once_flag mutex_init_flag;
 
 static void initializeMutex() {
-  ManagedStaticMutex = new sys::Mutex();
+  ManagedStaticMutex = new std::recursive_mutex();
 }
 
-static sys::Mutex* getManagedStaticMutex() {
+static std::recursive_mutex *getManagedStaticMutex() {
   llvm::call_once(mutex_init_flag, initializeMutex);
   return ManagedStaticMutex;
 }
@@ -35,7 +34,7 @@ void ManagedStaticBase::RegisterManagedStatic(void *(*Creator)(),
                                               void (*Deleter)(void*)) const {
   assert(Creator);
   if (llvm_is_multithreaded()) {
-    std::lock_guard<sys::Mutex> Lock(*getManagedStaticMutex());
+    std::lock_guard<std::recursive_mutex> Lock(*getManagedStaticMutex());
 
     if (!Ptr.load(std::memory_order_relaxed)) {
       void *Tmp = Creator();
@@ -77,7 +76,7 @@ void ManagedStaticBase::destroy() const {
 
 /// llvm_shutdown - Deallocate and destroy all ManagedStatic variables.
 void llvm::llvm_shutdown() {
-  std::lock_guard<sys::Mutex> Lock(*getManagedStaticMutex());
+  std::lock_guard<std::recursive_mutex> Lock(*getManagedStaticMutex());
 
   while (StaticList)
     StaticList->destroy();