1 files changed, 7 insertions, 14 deletions

diff --git a/llvm/lib/System/Win32/DynamicLibrary.inc b/llvm/lib/System/Win32/DynamicLibrary.inc
index ceecb5c0930..fd2ecc813cc 100644
--- a/llvm/lib/System/Win32/DynamicLibrary.inc
+++ b/llvm/lib/System/Win32/DynamicLibrary.inc
@@ -12,7 +12,6 @@
 //===----------------------------------------------------------------------===//
 
 #include "Win32.h"
-#include "llvm/System/RWMutex.h"
 
 #ifdef __MINGW32__
  #include <imagehlp.h>
@@ -68,7 +67,6 @@ extern "C" {
                                     PVOID UserContext)
 #endif
   {
-    llvm::sys::SmartScopedWriter<true> Writer(&SymbolsLock);
     // Ignore VC++ runtimes prior to 7.1.  Somehow some of them get loaded
     // into the process.
     if (stricmp(ModuleName, "msvci70") != 0 &&
@@ -91,13 +89,11 @@ extern "C" {
 }
 
 DynamicLibrary::DynamicLibrary() : handle(0) {
-  SmartScopedWriter<true> Writer(&SymbolsLock);
   handle = GetModuleHandle(NULL);
   OpenedHandles.push_back((HMODULE)handle);
 }
 
 DynamicLibrary::~DynamicLibrary() {
-  llvm::sys::SmartScopedWriter<true> Writer(&SymbolsLock);
   if (handle == 0)
     return;
 
@@ -119,7 +115,6 @@ DynamicLibrary::~DynamicLibrary() {
 bool DynamicLibrary::LoadLibraryPermanently(const char *filename,
                                             std::string *ErrMsg) {                                            
   if (filename) {
-    llvm::sys::SmartScopedWriter<true> Writer(&SymbolsLock);
     HMODULE a_handle = LoadLibrary(filename);
 
     if (a_handle == 0)
@@ -171,24 +166,22 @@ bool DynamicLibrary::LoadLibraryPermanently(const char *filename,
 
 void* DynamicLibrary::SearchForAddressOfSymbol(const char* symbolName) {
   // First check symbols added via AddSymbol().
-  SymbolsLock.reader_acquire();
-  std::map<std::string, void *>::iterator I = symbols.find(symbolName);
-  std::map<std::string, void *>::iterator E = symbols.end();
-  SymbolsLock.reader_release();
-  if (I != E)
-    return I->second;
+  if (ExplicitSymbols) {
+    std::map<std::string, void *>::iterator I = 
+      ExplicitSymbols->find(symbolName);
+    std::map<std::string, void *>::iterator E = ExplicitSymbols->end();
+    if (I != E)
+      return I->second;
+  }
 
   // Now search the libraries.
-  SymbolsLock.writer_acquire();
   for (std::vector<HMODULE>::iterator I = OpenedHandles.begin(),
        E = OpenedHandles.end(); I != E; ++I) {
     FARPROC ptr = GetProcAddress((HMODULE)*I, symbolName);
     if (ptr) {
-      SymbolsLock.writer_release();
       return (void *) ptr;
     }
   }
-  SymbolsLock.writer_release();
 
 #if defined(__MINGW32__)
   {