From 87c2b141d0fe879562c8732ca209212306ab8a7d Mon Sep 17 00:00:00 2001
From: Matthew Newhook <matthew@zeroc.com>
Date: Tue, 8 Dec 2009 19:54:47 -0330
Subject: http://bugzilla/bugzilla/show_bug.cgi?id=4203 - Use gcc native atomic
 functions

---
 cpp/src/IceUtil/Shared.cpp | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'cpp/src/IceUtil/Shared.cpp')

diff --git a/cpp/src/IceUtil/Shared.cpp b/cpp/src/IceUtil/Shared.cpp
index 2c0205a4265..c25e8e74ee6 100644
--- a/cpp/src/IceUtil/Shared.cpp
+++ b/cpp/src/IceUtil/Shared.cpp
@@ -114,6 +114,9 @@ IceUtil::Shared::__incRef()
 #if defined(_WIN32)
     assert(InterlockedExchangeAdd(&_ref, 0) >= 0);
     InterlockedIncrement(&_ref);
+#elif defined(ICE_HAS_GCC_BUILTINS)
+    int c = __sync_fetch_and_add(&_ref, 1);
+    assert(c >= 0);
 #elif defined(ICE_HAS_ATOMIC_FUNCTIONS)
     assert(IceUtilInternal::atomicExchangeAdd(&_ref, 0) >= 0);
     IceUtilInternal::atomicInc(&_ref);
@@ -135,6 +138,14 @@ IceUtil::Shared::__decRef()
         _noDelete = true;
         delete this;
     }
+#elif defined(ICE_HAS_GCC_BUILTINS)
+    int c = __sync_fetch_and_sub(&_ref, 1);
+    assert(c > 0);
+    if(c == 1 && !_noDelete)
+    {
+        _noDelete = true;
+        delete this;
+    }
 #elif defined(ICE_HAS_ATOMIC_FUNCTIONS)
     assert(IceUtilInternal::atomicExchangeAdd(&_ref, 0) > 0);
     if(IceUtilInternal::atomicDecAndTest(&_ref) && !_noDelete)
@@ -164,6 +175,8 @@ IceUtil::Shared::__getRef() const
 {
 #if defined(_WIN32)
     return InterlockedExchangeAdd(const_cast<LONG*>(&_ref), 0);
+#elif defined(ICE_HAS_GCC_BUILTINS)
+    return __sync_fetch_and_sub(const_cast<volatile int*>(&_ref), 0);
 #elif defined(ICE_HAS_ATOMIC_FUNCTIONS)
     return IceUtilInternal::atomicExchangeAdd(const_cast<volatile int*>(&_ref), 0);
 #else
-- 
cgit v1.2.3