add apr atomic support for OS/390

git-svn-id: https://svn.apache.org/repos/asf/apr/apr/trunk@63182 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 82 insertions, 0 deletions

diff --git a/atomic/os390/atomic.c b/atomic/os390/atomic.c
new file mode 100644
index 000000000..b6f41b242
--- /dev/null
+++ b/atomic/os390/atomic.c
@@ -0,0 +1,82 @@
+/* ====================================================================
+ * The Apache Software License, Version 1.1
+ *
+ * Copyright (c) 2000-2002 The Apache Software Foundation.  All rights
+ * reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. The end-user documentation included with the redistribution,
+ *    if any, must include the following acknowledgment:
+ *       "This product includes software developed by the
+ *        Apache Software Foundation (http://www.apache.org/)."
+ *    Alternately, this acknowledgment may appear in the software itself,
+ *    if and wherever such third-party acknowledgments normally appear.
+ *
+ * 4. The names "Apache" and "Apache Software Foundation" must
+ *    not be used to endorse or promote products derived from this
+ *    software without prior written permission. For written
+ *    permission, please contact apache@apache.org.
+ *
+ * 5. Products derived from this software may not be called "Apache",
+ *    nor may "Apache" appear in their name, without prior written
+ *    permission of the Apache Software Foundation.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation.  For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ */
+
+
+#include "apr.h"
+#include "apr_atomic.h"
+
+#if APR_HAS_THREADS
+
+apr_atomic_t apr_atomic_add(apr_atomic_t *mem, apr_uint32_t val) 
+{
+    apr_atomic_t old, new_val; 
+
+    old = *mem;   /* old is automatically updated on cs failure */
+    do {
+        new_val = old + val;
+    } while (__cs(&old, mem, new_val)); 
+
+    return new_val;
+}
+
+apr_uint32_t apr_atomic_cas(apr_atomic_t *mem, apr_uint32_t swap, 
+                            apr_uint32_t cmp)
+{
+    apr_uint32_t old = cmp;
+    
+    __cs(&old, mem, swap);
+    return old; /* old is automatically updated from mem on cs failure */
+}
+
+#endif /* APR_HAS_THREADS */