Apache Portable Runtime Utility Library
apr_optional_hooks.h
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1/* Licensed to the Apache Software Foundation (ASF) under one or more
2 * contributor license agreements. See the NOTICE file distributed with
3 * this work for additional information regarding copyright ownership.
4 * The ASF licenses this file to You under the Apache License, Version 2.0
5 * (the "License"); you may not use this file except in compliance with
6 * the License. You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
22#ifndef APR_OPTIONAL_HOOK_H
23#define APR_OPTIONAL_HOOK_H
24
25#include "apr_tables.h"
26
27#ifdef __cplusplus
28extern "C" {
29#endif
48APU_DECLARE(void) apr_optional_hook_add(const char *szName,void (*pfn)(void),
49 const char * const *aszPre,
50 const char * const *aszSucc,
51 int nOrder);
52
64#define APR_OPTIONAL_HOOK(ns,name,pfn,aszPre,aszSucc,nOrder) do { \
65 ns##_HOOK_##name##_t *apu__hook = pfn; \
66 apr_optional_hook_add(#name,(void (*)(void))apu__hook,aszPre, aszSucc, nOrder); \
67} while (0)
68
74APU_DECLARE(apr_array_header_t *) apr_optional_hook_get(const char *szName);
75
90#define APR_IMPLEMENT_OPTIONAL_HOOK_RUN_ALL(ns,link,ret,name,args_decl,args_use,ok,decline) \
91link##_DECLARE(ret) ns##_run_##name args_decl \
92 { \
93 ns##_LINK_##name##_t *pHook; \
94 int n; \
95 ret rv; \
96 apr_array_header_t *pHookArray=apr_optional_hook_get(#name); \
97\
98 if(!pHookArray) \
99 return ok; \
100\
101 pHook=(ns##_LINK_##name##_t *)pHookArray->elts; \
102 for(n=0 ; n < pHookArray->nelts ; ++n) \
103 { \
104 rv=(pHook[n].pFunc)args_use; \
105\
106 if(rv != ok && rv != decline) \
107 return rv; \
108 } \
109 return ok; \
110 }
111
113#ifdef __cplusplus
114}
115#endif
116
117#endif /* APR_OPTIONAL_HOOK_H */
void apr_optional_hook_add(const char *szName, void(*pfn)(void), const char *const *aszPre, const char *const *aszSucc, int nOrder)