1 files changed, 95 insertions, 0 deletions
diff --git a/sal/osl/unx/interlck.cxx b/sal/osl/unx/interlck.cxx
new file mode 100644
index 000000000..81404cb57
--- /dev/null
+++ b/sal/osl/unx/interlck.cxx
@@ -0,0 +1,95 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include "system.hxx"
+
+#include <config_global.h>
+#include <osl/interlck.h>
+
+#if  ( defined (__sun) || defined ( NETBSD ) ) && defined ( SPARC )
+#error please use asm/interlck_sparc.s
+#elif defined (__sun) && defined ( X86 )
+#error please use asm/interlck_x86.s
+#elif HAVE_GCC_BUILTIN_ATOMIC
+oslInterlockedCount SAL_CALL osl_incrementInterlockedCount(oslInterlockedCount* pCount)
+{
+    return __sync_add_and_fetch(pCount, 1);
+}
+oslInterlockedCount SAL_CALL osl_decrementInterlockedCount(oslInterlockedCount* pCount)
+{
+    return __sync_sub_and_fetch(pCount, 1);
+}
+#elif defined ( __GNUC__ ) && ( defined ( X86 ) || defined ( X86_64 ) )
+/* That's possible on x86-64 too since oslInterlockedCount is a sal_Int32 */
+
+oslInterlockedCount SAL_CALL osl_incrementInterlockedCount(oslInterlockedCount* pCount)
+{
+    register oslInterlockedCount nCount asm("%eax");
+    nCount = 1;
+    __asm__ __volatile__ (
+        "lock\n\t"
+        "xaddl %0, %1\n\t"
+    :   "+r" (nCount), "+m" (*pCount)
+    :   /* nothing */
+    :   "memory");
+    return ++nCount;
+}
+
+oslInterlockedCount SAL_CALL osl_decrementInterlockedCount(oslInterlockedCount* pCount)
+{
+    register oslInterlockedCount nCount asm("%eax");
+    nCount = -1;
+    __asm__ __volatile__ (
+        "lock\n\t"
+        "xaddl %0, %1\n\t"
+    :   "+r" (nCount), "+m" (*pCount)
+    :   /* nothing */
+    :   "memory");
+    return --nCount;
+}
+#else
+/* use only if nothing else works, expensive due to single mutex for all reference counts */
+
+static pthread_mutex_t InterLock = PTHREAD_MUTEX_INITIALIZER;
+
+oslInterlockedCount SAL_CALL osl_incrementInterlockedCount(oslInterlockedCount* pCount)
+{
+    oslInterlockedCount Count;
+
+    pthread_mutex_lock(&InterLock);
+    Count = ++(*pCount);
+    pthread_mutex_unlock(&InterLock);
+
+    return Count;
+}
+
+oslInterlockedCount SAL_CALL osl_decrementInterlockedCount(oslInterlockedCount* pCount)
+{
+    oslInterlockedCount Count;
+
+    pthread_mutex_lock(&InterLock);
+    Count = --(*pCount);
+    pthread_mutex_unlock(&InterLock);
+
+    return Count;
+}
+
+#endif /* default */
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */