GME  13
apr_optional.h
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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  */
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 */