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00001 /* Licensed to the Apache Software Foundation (ASF) under one or more 00002 * contributor license agreements. See the NOTICE file distributed with 00003 * this work for additional information regarding copyright ownership. 00004 * The ASF licenses this file to You under the Apache License, Version 2.0 00005 * (the "License"); you may not use this file except in compliance with 00006 * the License. You may obtain a copy of the License at 00007 * 00008 * http://www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 */ 00022 #ifndef APR_OPTIONAL_HOOK_H 00023 #define APR_OPTIONAL_HOOK_H 00024 00025 #include "apr_tables.h" 00026 00027 #ifdef __cplusplus 00028 extern "C" { 00029 #endif 00030 00048 APU_DECLARE(void) apr_optional_hook_add(const char *szName,void (*pfn)(void), 00049 const char * const *aszPre, 00050 const char * const *aszSucc, 00051 int nOrder); 00052 00064 #define APR_OPTIONAL_HOOK(ns,name,pfn,aszPre,aszSucc,nOrder) do { \ 00065 ns##_HOOK_##name##_t *apu__hook = pfn; \ 00066 apr_optional_hook_add(#name,(void (*)(void))apu__hook,aszPre, aszSucc, nOrder); \ 00067 } while (0) 00068 00074 APU_DECLARE(apr_array_header_t *) apr_optional_hook_get(const char *szName); 00075 00090 #define APR_IMPLEMENT_OPTIONAL_HOOK_RUN_ALL(ns,link,ret,name,args_decl,args_use,ok,decline) \ 00091 link##_DECLARE(ret) ns##_run_##name args_decl \ 00092 { \ 00093 ns##_LINK_##name##_t *pHook; \ 00094 int n; \ 00095 ret rv; \ 00096 apr_array_header_t *pHookArray=apr_optional_hook_get(#name); \ 00097 \ 00098 if(!pHookArray) \ 00099 return ok; \ 00100 \ 00101 pHook=(ns##_LINK_##name##_t *)pHookArray->elts; \ 00102 for(n=0 ; n < pHookArray->nelts ; ++n) \ 00103 { \ 00104 rv=(pHook[n].pFunc)args_use; \ 00105 \ 00106 if(rv != ok && rv != decline) \ 00107 return rv; \ 00108 } \ 00109 return ok; \ 00110 } 00111 00113 #ifdef __cplusplus 00114 } 00115 #endif 00116 00117 #endif /* APR_OPTIONAL_HOOK_H */