shared_ptr_base.h (_Sp_counted_base<_S_single>): Use non-atomic operations.

	* include/bits/shared_ptr_base.h (_Sp_counted_base<_S_single>): Use
	non-atomic operations.
	* testsuite/20_util/shared_ptr/cons/43820_neg.cc: Adjust line number.
	* testsuite/20_util/shared_ptr/cons/void_neg.cc: Likewise.

From-SVN: r204949

libstdc++-v3/ChangeLog

+2013-11-18  Jonathan Wakely  <jwakely.gcc@gmail.com>
+
+	* include/bits/shared_ptr_base.h (_Sp_counted_base<_S_single>): Use
+	non-atomic operations.
+	* testsuite/20_util/shared_ptr/cons/43820_neg.cc: Adjust line number.
+	* testsuite/20_util/shared_ptr/cons/void_neg.cc: Likewise.
+
 2013-11-16  Edward Smith-Rowland  <3dw4rd@verizon.net>
 
 	Implement N3762 string_view: a non-owning reference to a string.

libstdc++-v3/include/bits/shared_ptr_base.h

@@ -209,11 +209,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     _Sp_counted_base<_S_single>::
     _M_add_ref_lock()
     {
-      if (__gnu_cxx::__exchange_and_add_dispatch(&_M_use_count, 1) == 0)
-	{
-	  _M_use_count = 0;
-	  __throw_bad_weak_ptr();
-	}
+      if (_M_use_count == 0)
+	__throw_bad_weak_ptr();
+      ++_M_use_count;
     }
 
   template<>
@@ -248,6 +246,41 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 					  __ATOMIC_RELAXED));
     }
 
+  template<>
+    inline void
+    _Sp_counted_base<_S_single>::_M_add_ref_copy()
+    { ++_M_use_count; }
+
+  template<>
+    inline void
+    _Sp_counted_base<_S_single>::_M_release() noexcept
+    {
+      if (--_M_use_count == 0)
+        {
+          _M_dispose();
+          if (--_M_weak_count == 0)
+            _M_destroy();
+        }
+    }
+
+  template<>
+    inline void
+    _Sp_counted_base<_S_single>::_M_weak_add_ref() noexcept
+    { ++_M_weak_count; }
+
+  template<>
+    inline void
+    _Sp_counted_base<_S_single>::_M_weak_release() noexcept
+    {
+      if (--_M_weak_count == 0)
+        _M_destroy();
+    }
+
+  template<>
+    inline long
+    _Sp_counted_base<_S_single>::_M_get_use_count() const noexcept
+    { return _M_use_count; }
+
 
   // Forward declarations.
   template<typename _Tp, _Lock_policy _Lp = __default_lock_policy>

libstdc++-v3/testsuite/20_util/shared_ptr/cons/43820_neg.cc

@@ -32,7 +32,7 @@ void test01()
 {
   X* px = 0;
   std::shared_ptr<X> p1(px);   // { dg-error "here" }
-  // { dg-error "incomplete" "" { target *-*-* } 779 }
+  // { dg-error "incomplete" "" { target *-*-* } 812 }
 
   std::shared_ptr<X> p9(ap());  // { dg-error "here" }
   // { dg-error "incomplete" "" { target *-*-* } 307 }

libstdc++-v3/testsuite/20_util/shared_ptr/cons/void_neg.cc

@@ -25,5 +25,5 @@
 void test01()
 {
   std::shared_ptr<void> p((void*)nullptr);   // { dg-error "here" }
-  // { dg-error "incomplete" "" { target *-*-* } 778 }
+  // { dg-error "incomplete" "" { target *-*-* } 811 }
 }