1 files changed, 92 insertions, 0 deletions
diff --git a/src/corelib/arch/sparc/qatomic_sparc.cpp b/src/corelib/arch/sparc/qatomic_sparc.cpp
new file mode 100644
index 0000000000..ec398e03b6
--- /dev/null
+++ b/src/corelib/arch/sparc/qatomic_sparc.cpp
@@ -0,0 +1,92 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtCore/qatomic.h>
+
+#include <limits.h>
+#include <sched.h>
+
+extern "C" {
+
+int q_atomic_trylock_int(volatile int *addr);
+int q_atomic_trylock_ptr(volatile void *addr);
+
+Q_CORE_EXPORT int q_atomic_lock_int(volatile int *addr)
+{
+    int returnValue = q_atomic_trylock_int(addr);
+
+    if (returnValue == INT_MIN) {
+        do {
+            // spin until we think we can succeed
+            do {
+                sched_yield();
+                returnValue = *addr;
+            } while (returnValue == INT_MIN);
+            
+            // try again
+            returnValue = q_atomic_trylock_int(addr);
+        } while (returnValue == INT_MIN);
+    }
+
+    return returnValue;
+}
+
+Q_CORE_EXPORT int q_atomic_lock_ptr(volatile void *addr)
+{
+    int returnValue = q_atomic_trylock_ptr(addr);
+
+    if (returnValue == -1) {
+        do {
+            // spin until we think we can succeed
+            do {
+                sched_yield();
+                returnValue = *reinterpret_cast<volatile int *>(addr);
+            } while (returnValue == -1);
+
+            // try again
+            returnValue = q_atomic_trylock_ptr(addr);
+        } while (returnValue == -1);
+    }
+
+    return returnValue;
+}
+
+} // extern "C"