freebsd-skq/contrib/apr-util/include/apr_optional.h
peter 6c648dd642 Introduce svnlite so that we can check out our source code again.
This is actually a fully functional build except:
* All internal shared libraries are static linked to make sure there
  is no interference with ports (and to reduce build time).
* It does not have the python/perl/etc plugin or API support.
* By default, it installs as "svnlite" rather than "svn".
* If WITH_SVN added in make.conf, you get "svn".
* If WITHOUT_SVNLITE is in make.conf, this is completely disabled.

To be absolutely clear, this is not intended for any use other than
checking out freebsd source and committing, like we once did with cvs.

It should be usable for small scale local repositories that don't
need the python/perl plugin architecture.
2013-06-18 02:53:45 +00:00

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2.7 KiB
C

/* 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.
*/
#ifndef APR_OPTIONAL_H
#define APR_OPTIONAL_H
#include "apu.h"
/**
* @file apr_optional.h
* @brief APR-UTIL registration of functions exported by modules
*/
#ifdef __cplusplus
extern "C" {
#endif
/**
* @defgroup APR_Util_Opt Optional Functions
* @ingroup APR_Util
*
* Typesafe registration and retrieval of functions that may not be present
* (i.e. functions exported by optional modules)
* @{
*/
/**
* The type of an optional function.
* @param name The name of the function
*/
#define APR_OPTIONAL_FN_TYPE(name) apr_OFN_##name##_t
/**
* Declare an optional function.
* @param ret The return type of the function
* @param name The name of the function
* @param args The function arguments (including brackets)
*/
#define APR_DECLARE_OPTIONAL_FN(ret,name,args) \
typedef ret (APR_OPTIONAL_FN_TYPE(name)) args
/**
* XXX: This doesn't belong here, then!
* Private function! DO NOT USE!
* @internal
*/
typedef void (apr_opt_fn_t)(void);
/** @internal */
APU_DECLARE_NONSTD(void) apr_dynamic_fn_register(const char *szName,
apr_opt_fn_t *pfn);
/**
* Register an optional function. This can be later retrieved, type-safely, by
* name. Like all global functions, the name must be unique. Note that,
* confusingly but correctly, the function itself can be static!
* @param name The name of the function
*/
#define APR_REGISTER_OPTIONAL_FN(name) do { \
APR_OPTIONAL_FN_TYPE(name) *apu__opt = name; \
apr_dynamic_fn_register(#name,(apr_opt_fn_t *)apu__opt); \
} while (0)
/** @internal
* Private function! DO NOT USE!
*/
APU_DECLARE(apr_opt_fn_t *) apr_dynamic_fn_retrieve(const char *szName);
/**
* Retrieve an optional function. Returns NULL if the function is not present.
* @param name The name of the function
*/
#define APR_RETRIEVE_OPTIONAL_FN(name) \
(APR_OPTIONAL_FN_TYPE(name) *)apr_dynamic_fn_retrieve(#name)
/** @} */
#ifdef __cplusplus
}
#endif
#endif /* APR_OPTIONAL_H */