Added new Host/Atomic.h to replace use of <atomic> in LLDB headers.

llvm-svn: 190927

3 files changed, 58 insertions, 10 deletions

diff --git a/lldb/include/lldb/DataFormatters/FormatManager.h b/lldb/include/lldb/DataFormatters/FormatManager.h
index 0b1086e0c3e..09904a6e1f2 100644
--- a/lldb/include/lldb/DataFormatters/FormatManager.h
+++ b/lldb/include/lldb/DataFormatters/FormatManager.h
@@ -12,7 +12,6 @@
 
 // C Includes
 // C++ Includes
-#include <atomic>
 
 // Other libraries and framework includes
 // Project includes
@@ -24,6 +23,8 @@
 #include "lldb/DataFormatters/TypeCategory.h"
 #include "lldb/DataFormatters/TypeCategoryMap.h"
 
+#include "lldb/Host/Atomic.h"
+
 namespace lldb_private {
     
 // this file (and its. cpp) contain the low-level implementation of LLDB Data Visualization
@@ -192,7 +193,7 @@ public:
     void
     Changed ()
     {
-        m_last_revision.fetch_add(1);
+        AtomicIncrement((cas_flag*)&m_last_revision);
         m_format_cache.Clear ();
     }
     
@@ -210,7 +211,7 @@ private:
     FormatCache m_format_cache;
     ValueNavigator m_value_nav;
     NamedSummariesMap m_named_summaries_map;
-    std::atomic<uint32_t> m_last_revision;
+    uint32_t m_last_revision;
     TypeCategoryMap m_categories_map;
     
     ConstString m_default_category_name;
diff --git a/lldb/include/lldb/Host/Atomic.h b/lldb/include/lldb/Host/Atomic.h
new file mode 100644
index 00000000000..697f738e52a
--- /dev/null
+++ b/lldb/include/lldb/Host/Atomic.h
@@ -0,0 +1,47 @@
+//===-- Atomic.h ------------------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef liblldb_Atomic_h_
+#define liblldb_Atomic_h_
+
+#ifdef _MSC_VER
+#include <intrin.h>
+#endif
+
+namespace lldb_private {
+
+#ifdef _MSC_VER
+typedef long cas_flag;
+#else
+typedef uint32_t cas_flag;
+#endif
+
+inline cas_flag
+AtomicIncrement(volatile cas_flag* ptr)
+{
+#ifdef _MSC_VER
+    return _InterlockedIncrement(ptr);
+#else
+    return __sync_add_and_fetch(ptr, 1);
+#endif
+}
+
+inline cas_flag
+AtomicDecrement(volatile cas_flag* ptr)
+{
+#ifdef _MSC_VER
+    return _InterlockedDecrement(ptr);
+#else
+    return __sync_add_and_fetch(ptr, -1);
+#endif
+}
+
+}
+
+#endif
diff --git a/lldb/include/lldb/Utility/SharingPtr.h b/lldb/include/lldb/Utility/SharingPtr.h
index afae0ee0809..8359c1caf94 100644
--- a/lldb/include/lldb/Utility/SharingPtr.h
+++ b/lldb/include/lldb/Utility/SharingPtr.h
@@ -12,7 +12,7 @@
 
 #include <algorithm>
 #include <memory>
-#include <atomic>
+#include "lldb/Host/Atomic.h"
 
 //#define ENABLE_SP_LOGGING 1 // DON'T CHECK THIS LINE IN UNLESS COMMENTED OUT
 #if defined (ENABLE_SP_LOGGING)
@@ -27,16 +27,16 @@ namespace imp {
     
 template <class T>
 inline T
-increment(std::atomic<T>& t)
+increment(T& t)
 {
-    return t.fetch_add(1);
+    return AtomicIncrement((cas_flag*)&t);
 }
 
 template <class T>
 inline T
-decrement(std::atomic<T>& t)
+decrement(T& t)
 {
-    return t.fetch_sub(1);
+    return AtomicDecrement((cas_flag*)&t);
 }
 
 class shared_count
@@ -45,7 +45,7 @@ class shared_count
     shared_count& operator=(const shared_count&);
 
 protected:
-    std::atomic<long> shared_owners_;
+    long shared_owners_;
     virtual ~shared_count();
 private:
     virtual void on_zero_shared() = 0;
@@ -580,7 +580,7 @@ public:
     }
     
 protected:
-    std::atomic<long> shared_owners_;
+    long shared_owners_;
    
     friend class IntrusiveSharingPtr<T>;