{ Copyright 1999-2005 The Apache Software Foundation or its licensors, as
 * applicable.
 *
 * Licensed 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.
 }

{#include "apr.h"
#include "apr_hooks.h"
#include "apr_optional_hooks.h"}

{
 * @file ap_config.h
 * @brief Symbol export macros and hook functions
 }

{ Although this file doesn't declare any hooks, declare the hook group here }
{ @defgroup hooks Apache Hooks }

{$ifdef DOXYGEN}
{ define these just so doxygen documents them }

{
 * AP_DECLARE_STATIC is defined when including Apache's Core headers,
 * to provide static linkage when the dynamic library may be unavailable.
 *
 * @see AP_DECLARE_EXPORT
 *
 * AP_DECLARE_STATIC and AP_DECLARE_EXPORT are left undefined when
 * including Apache's Core headers, to import and link the symbols from the
 * dynamic Apache Core library and assure appropriate indirection and calling
 * conventions at compile time.
 }
{$define AP_DECLARE_STATIC}
{
 * AP_DECLARE_EXPORT is defined when building the Apache Core dynamic
 * library, so that all public symbols are exported.
 *
 * @see AP_DECLARE_STATIC
 }
{$define AP_DECLARE_EXPORT}

{$endif} { def DOXYGEN }

//#if !defined(WIN32)
{
 * Apache Core dso functions are declared with AP_DECLARE(), so they may
 * use the most appropriate calling convention.  Hook functions and other
 * Core functions with variable arguments must use AP_DECLARE_NONSTD().
 * @code
 * AP_DECLARE(rettype) ap_func(args)
 * @endcode
 }
//#define AP_DECLARE(type)            type

{
 * Apache Core dso variable argument and hook functions are declared with
 * AP_DECLARE_NONSTD(), as they must use the C language calling convention.
 * @see AP_DECLARE
 * @code
 * AP_DECLARE_NONSTD(rettype) ap_func(args [...])
 * @endcode
 }
//#define AP_DECLARE_NONSTD(type)     type

{
 * Apache Core dso variables are declared with AP_MODULE_DECLARE_DATA.
 * This assures the appropriate indirection is invoked at compile time.
 *
 * @note AP_DECLARE_DATA extern type apr_variable; syntax is required for
 * declarations within headers to properly import the variable.
 * @code
 * AP_DECLARE_DATA type apr_variable
 * @endcode
 }
{#define AP_DECLARE_DATA

#elif defined(AP_DECLARE_STATIC)
#define AP_DECLARE(type)            type __stdcall
#define AP_DECLARE_NONSTD(type)     type
#define AP_DECLARE_DATA
#elif defined(AP_DECLARE_EXPORT)
#define AP_DECLARE(type)            __declspec(dllexport) type __stdcall
#define AP_DECLARE_NONSTD(type)     __declspec(dllexport) type
#define AP_DECLARE_DATA             __declspec(dllexport)
#else
#define AP_DECLARE(type)            __declspec(dllimport) type __stdcall
#define AP_DECLARE_NONSTD(type)     __declspec(dllimport) type
#define AP_DECLARE_DATA             __declspec(dllimport)
#endif

#if !defined(WIN32) || defined(AP_MODULE_DECLARE_STATIC)}
{
 * Declare a dso module's exported module structure as AP_MODULE_DECLARE_DATA.
 *
 * Unless AP_MODULE_DECLARE_STATIC is defined at compile time, symbols
 * declared with AP_MODULE_DECLARE_DATA are always exported.
 * @code
 * module AP_MODULE_DECLARE_DATA mod_tag
 * @endcode
 }
{#if defined(WIN32)
#define AP_MODULE_DECLARE(type)            type __stdcall
#else
#define AP_MODULE_DECLARE(type)            type
#endif
#define AP_MODULE_DECLARE_NONSTD(type)     type
#define AP_MODULE_DECLARE_DATA
#else}
{
 * AP_MODULE_DECLARE_EXPORT is a no-op.  Unless contradicted by the
 * AP_MODULE_DECLARE_STATIC compile-time symbol, it is assumed and defined.
 *
 * The old SHARED_MODULE compile-time symbol is now the default behavior,
 * so it is no longer referenced anywhere with Apache 2.0.
 }
{#define AP_MODULE_DECLARE_EXPORT
#define AP_MODULE_DECLARE(type)          __declspec(dllexport) type __stdcall
#define AP_MODULE_DECLARE_NONSTD(type)   __declspec(dllexport) type
#define AP_MODULE_DECLARE_DATA           __declspec(dllexport)
#endif}

{
 * Declare a hook function
 * @param ret The return type of the hook
 * @param name The hook's name (as a literal)
 * @param args The arguments the hook function takes, in brackets.
 }
{#define AP_DECLARE_HOOK(ret,name,args) \
	APR_DECLARE_EXTERNAL_HOOK(ap,AP,ret,name,args)
}
{ @internal }
{#define AP_IMPLEMENT_HOOK_BASE(name) \
	APR_IMPLEMENT_EXTERNAL_HOOK_BASE(ap,AP,name)
}
{
 * Implement an Apache core hook that has no return code, and
 * therefore runs all of the registered functions. The implementation
 * is called ap_run_<i>name</i>.
 *
 * @param name The name of the hook
 * @param args_decl The declaration of the arguments for the hook, for example
 * "(int x,void *y)"
 * @param args_use The arguments for the hook as used in a call, for example
 * "(x,y)"
 * @note If IMPLEMENTing a hook that is not linked into the Apache core,
 * (e.g. within a dso) see APR_IMPLEMENT_EXTERNAL_HOOK_VOID.
 }
{#define AP_IMPLEMENT_HOOK_VOID(name,args_decl,args_use) \
	APR_IMPLEMENT_EXTERNAL_HOOK_VOID(ap,AP,name,args_decl,args_use)
}
{
 * Implement an Apache core hook that runs until one of the functions
 * returns something other than ok or decline. That return value is
 * then returned from the hook runner. If the hooks run to completion,
 * then ok is returned. Note that if no hook runs it would probably be
 * more correct to return decline, but this currently does not do
 * so. The implementation is called ap_run_<i>name</i>.
 *
 * @param ret The return type of the hook (and the hook runner)
 * @param name The name of the hook
 * @param args_decl The declaration of the arguments for the hook, for example
 * "(int x,void *y)"
 * @param args_use The arguments for the hook as used in a call, for example
 * "(x,y)"
 * @param ok The "ok" return value
 * @param decline The "decline" return value
 * @return ok, decline or an error.
 * @note If IMPLEMENTing a hook that is not linked into the Apache core,
 * (e.g. within a dso) see APR_IMPLEMENT_EXTERNAL_HOOK_RUN_ALL.
 }
{#define AP_IMPLEMENT_HOOK_RUN_ALL(ret,name,args_decl,args_use,ok,decline) \
	APR_IMPLEMENT_EXTERNAL_HOOK_RUN_ALL(ap,AP,ret,name,args_decl, \
                                            args_use,ok,decline)
}
{
 * Implement a hook that runs until a function returns something other than
 * decline. If all functions return decline, the hook runner returns decline.
 * The implementation is called ap_run_<i>name</i>.
 *
 * @param ret The return type of the hook (and the hook runner)
 * @param name The name of the hook
 * @param args_decl The declaration of the arguments for the hook, for example
 * "(int x,void *y)"
 * @param args_use The arguments for the hook as used in a call, for example
 * "(x,y)"
 * @param decline The "decline" return value
 * @return decline or an error.
 * @note If IMPLEMENTing a hook that is not linked into the Apache core
 * (e.g. within a dso) see APR_IMPLEMENT_EXTERNAL_HOOK_RUN_FIRST.
 }
{#define AP_IMPLEMENT_HOOK_RUN_FIRST(ret,name,args_decl,args_use,decline) \
	APR_IMPLEMENT_EXTERNAL_HOOK_RUN_FIRST(ap,AP,ret,name,args_decl, \
                                              args_use,decline)
}
{ Note that the other optional hook implementations are straightforward but
 * have not yet been needed
 }

{
 * Implement an optional hook. This is exactly the same as a standard hook
 * implementation, except the hook is optional.
 * @see AP_IMPLEMENT_HOOK_RUN_ALL
 }
{#define AP_IMPLEMENT_OPTIONAL_HOOK_RUN_ALL(ret,name,args_decl,args_use,ok, \
					   decline) \
	APR_IMPLEMENT_OPTIONAL_HOOK_RUN_ALL(ap,AP,ret,name,args_decl, \
                                            args_use,ok,decline)
}
{
 * Hook an optional hook. Unlike static hooks, this uses a macro instead of a
 * function.
 }
{#define AP_OPTIONAL_HOOK(name,fn,pre,succ,order) \
        APR_OPTIONAL_HOOK(ap,name,fn,pre,succ,order)

#include "os.h"
#if !defined(WIN32) && !defined(NETWARE)
#include "ap_config_auto.h"
#include "ap_config_layout.h"
#endif
#if defined(NETWARE)
#define AP_NONBLOCK_WHEN_MULTI_LISTEN 1
#endif}

{ TODO - We need to put OS detection back to make all the following work }

{$if defined(SUNOS) or defined(IRIX) or defined(NEXT) or defined(AUX)
 or defined (UW) or defined(LYNXOS) or defined(TPF)}
{ These systems don't do well with any lingering close code; I don't know
 * why -- manoj }
{$define NO_LINGCLOSE}
{$endif}

{ If APR has OTHER_CHILD logic, use reliable piped logs. }
{$ifdef APR_HAS_OTHER_CHILD}
{$define AP_HAVE_RELIABLE_PIPED_LOGS}
{$endif}

