1 files changed, 88 insertions, 0 deletions
diff --git a/src/corelib/arch/parisc/qatomic_parisc.cpp b/src/corelib/arch/parisc/qatomic_parisc.cpp
new file mode 100644
index 0000000000..fa446c5d7b
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+++ b/src/corelib/arch/parisc/qatomic_parisc.cpp
@@ -0,0 +1,88 @@
+/****************************************************************************
+**
+** 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/qglobal.h>
+#include <QtCore/qhash.h>
+
+QT_BEGIN_NAMESPACE
+
+QT_USE_NAMESPACE
+
+#define UNLOCKED    {-1,-1,-1,-1}
+#define UNLOCKED2      UNLOCKED,UNLOCKED
+#define UNLOCKED4     UNLOCKED2,UNLOCKED2
+#define UNLOCKED8     UNLOCKED4,UNLOCKED4
+#define UNLOCKED16    UNLOCKED8,UNLOCKED8
+#define UNLOCKED32   UNLOCKED16,UNLOCKED16
+#define UNLOCKED64   UNLOCKED32,UNLOCKED32
+#define UNLOCKED128  UNLOCKED64,UNLOCKED64
+#define UNLOCKED256 UNLOCKED128,UNLOCKED128
+
+// use a 4k page for locks
+static int locks[256][4] = { UNLOCKED256 };
+
+int *getLock(volatile void *addr)
+{ return locks[qHash(const_cast<void *>(addr)) % 256]; }
+
+static int *align16(int *lock)
+{
+    ulong off = (((ulong) lock) % 16);
+    return off ? (int *)(ulong(lock) + 16 - off) : lock;
+}
+
+extern "C" {
+
+    int q_ldcw(volatile int *addr);
+
+    void q_atomic_lock(int *lock)
+    {
+        // ldcw requires a 16-byte aligned address
+        volatile int *x = align16(lock);
+        while (q_ldcw(x) == 0)
+	    ;
+    }
+
+    void q_atomic_unlock(int *lock)
+    { lock[0] = lock[1] = lock[2] = lock[3] = -1; }
+}
+
+
+QT_END_NAMESPACE