Add support for type-safe optional functions.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@87868 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 93 insertions, 0 deletions

diff --git a/modules/test/mod_optional_fn_import.c b/modules/test/mod_optional_fn_import.c
new file mode 100644
index 0000000000..2ad313ef9a
--- /dev/null
+++ b/modules/test/mod_optional_fn_import.c
@@ -0,0 +1,93 @@
+/* ====================================================================
+ * The Apache Software License, Version 1.1
+ *
+ * Copyright (c) 2001 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 "httpd.h"
+#include "http_config.h"
+#include "mod_optional_fn_export.h"
+#include "http_protocol.h"
+
+/* The alert will note a strange mirror-image style resemblance to
+ * mod_generic_hook_export.c. Yes, I _did_ mean export. Think about it.
+ */
+
+static APR_OPTIONAL_FN_TYPE(TestOptionalFn) *pfn;
+
+static int ImportLogTransaction(request_rec *r)
+{
+    if(pfn)
+	return pfn(r->the_request);
+    return DECLINED;
+}
+
+void ImportFnRetrieve(void)
+{
+    pfn=APR_RETRIEVE_OPTIONAL_FN(TestOptionalFn);
+}
+
+static void ImportRegisterHooks(apr_pool_t *p)
+{
+    ap_hook_log_transaction(ImportLogTransaction,NULL,NULL,APR_HOOK_MIDDLE);
+    ap_hook_optional_fn_retrieve(ImportFnRetrieve,NULL,NULL,APR_HOOK_MIDDLE);
+}
+
+module optional_fn_import_module =
+{
+    STANDARD20_MODULE_STUFF,
+    NULL,
+    NULL,
+    NULL,
+    NULL,
+    NULL,
+    ImportRegisterHooks
+};