Adding upstream version 1.6.3.upstream/1.6.3upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 117 insertions, 0 deletions

diff --git a/include/apr_optional_hooks.h b/include/apr_optional_hooks.h
new file mode 100644
index 0000000..8265f03
--- /dev/null
+++ b/include/apr_optional_hooks.h
@@ -0,0 +1,117 @@
+/* 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
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/**
+ * @file apr_optional_hooks.h
+ * @brief Apache optional hook functions
+ */
+
+
+#ifndef APR_OPTIONAL_HOOK_H
+#define APR_OPTIONAL_HOOK_H
+
+#include "apr_tables.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+/** 
+ * @defgroup APR_Util_OPT_HOOK Optional Hook Functions
+ * @ingroup APR_Util_Hook
+ * @{
+ */
+/**
+ * Function to implement the APR_OPTIONAL_HOOK Macro
+ * @internal
+ * @see APR_OPTIONAL_HOOK
+ *
+ * @param szName The name of the hook
+ * @param pfn A pointer to a function that will be called
+ * @param aszPre a NULL-terminated array of strings that name modules whose hooks should precede this one
+ * @param aszSucc a NULL-terminated array of strings that name modules whose hooks should succeed this one
+ * @param nOrder an integer determining order before honouring aszPre and aszSucc (for example HOOK_MIDDLE)
+ */
+
+
+APU_DECLARE(void) apr_optional_hook_add(const char *szName,void (*pfn)(void),
+					const char * const *aszPre,
+					const char * const *aszSucc,
+					int nOrder);
+
+/**
+ * Hook to an optional hook.
+ *
+ * @param ns The namespace prefix of the hook functions
+ * @param name The name of the hook
+ * @param pfn A pointer to a function that will be called
+ * @param aszPre a NULL-terminated array of strings that name modules whose hooks should precede this one
+ * @param aszSucc a NULL-terminated array of strings that name modules whose hooks should succeed this one
+ * @param nOrder an integer determining order before honouring aszPre and aszSucc (for example HOOK_MIDDLE)
+ */
+
+#define APR_OPTIONAL_HOOK(ns,name,pfn,aszPre,aszSucc,nOrder) do { \
+  ns##_HOOK_##name##_t *apu__hook = pfn; \
+  apr_optional_hook_add(#name,(void (*)(void))apu__hook,aszPre, aszSucc, nOrder); \
+} while (0)
+
+/**
+ * @internal
+ * @param szName - the name of the function
+ * @return the hook structure for a given hook
+ */
+APU_DECLARE(apr_array_header_t *) apr_optional_hook_get(const char *szName);
+
+/**
+ * Implement an optional hook that runs until one of the functions
+ * returns something other than OK or DECLINE.
+ *
+ * @param ns The namespace prefix of the hook functions
+ * @param link The linkage declaration prefix of the hook
+ * @param ret The type of the return value of the hook
+ * @param ret The type of the return value of the hook
+ * @param name The name of the hook
+ * @param args_decl The declaration of the arguments for the hook
+ * @param args_use The names for the arguments for the hook
+ * @param ok Success value
+ * @param decline Decline value
+ */
+#define APR_IMPLEMENT_OPTIONAL_HOOK_RUN_ALL(ns,link,ret,name,args_decl,args_use,ok,decline) \
+link##_DECLARE(ret) ns##_run_##name args_decl \
+    { \
+    ns##_LINK_##name##_t *pHook; \
+    int n; \
+    ret rv; \
+    apr_array_header_t *pHookArray=apr_optional_hook_get(#name); \
+\
+    if(!pHookArray) \
+	return ok; \
+\
+    pHook=(ns##_LINK_##name##_t *)pHookArray->elts; \
+    for(n=0 ; n < pHookArray->nelts ; ++n) \
+	{ \
+	rv=(pHook[n].pFunc)args_use; \
+\
+	if(rv != ok && rv != decline) \
+	    return rv; \
+	} \
+    return ok; \
+    }
+
+/** @} */
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* APR_OPTIONAL_HOOK_H */