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include/apr_optional.h

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00001 /* Copyright 2001-2005 The Apache Software Foundation or its licensors, as 00002 * applicable. 00003 * 00004 * Licensed under the Apache License, Version 2.0 (the "License"); 00005 * you may not use this file except in compliance with the License. 00006 * 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 */ 00016 00017 #ifndef APR_OPTIONAL_H 00018 #define APR_OPTIONAL_H 00019 00020 #include "apu.h" 00025 #ifdef __cplusplus 00026 extern "C" { 00027 #endif 00028 00042 #define APR_OPTIONAL_FN_TYPE(name) apr_OFN_##name##_t 00043 00050 #define APR_DECLARE_OPTIONAL_FN(ret,name,args) \ 00051 typedef ret (APR_OPTIONAL_FN_TYPE(name)) args 00052 00059 typedef void (apr_opt_fn_t)(void); 00061 APU_DECLARE_NONSTD(void) apr_dynamic_fn_register(const char *szName, 00062 apr_opt_fn_t *pfn); 00063 00070 #define APR_REGISTER_OPTIONAL_FN(name) do { \ 00071 APR_OPTIONAL_FN_TYPE(name) *apu__opt = name; \ 00072 apr_dynamic_fn_register(#name,(apr_opt_fn_t *)apu__opt); \ 00073 } while (0) 00074 00078 APU_DECLARE(apr_opt_fn_t *) apr_dynamic_fn_retrieve(const char *szName); 00079 00084 #define APR_RETRIEVE_OPTIONAL_FN(name) \ 00085 (APR_OPTIONAL_FN_TYPE(name) *)apr_dynamic_fn_retrieve(#name) 00086 00088 #ifdef __cplusplus 00089 } 00090 #endif 00091 00092 #endif /* APR_OPTIONAL_H */

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