1 /* ====================================================================
2 * The Apache Software License, Version 1.1
4 * Copyright (c) 2000-2001 The Apache Software Foundation. All rights
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8 * modification, are permitted provided that the following conditions
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59 #include "apr_hooks.h"
62 * @package Symbol Export Macros
66 * AP_DECLARE_EXPORT is defined when building the Apache Core dynamic
67 * library, so that all public symbols are exported.
69 * AP_DECLARE_STATIC is defined when including Apache's Core headers,
70 * to provide static linkage when the dynamic library may be unavailable.
72 * AP_DECLARE_STATIC and AP_DECLARE_EXPORT are left undefined when
73 * including Apache's Core headers, to import and link the symbols from the
74 * dynamic Apache Core library and assure appropriate indirection and calling
75 * conventions at compile time.
77 * @deffunc AP_DECLARE_EXPORT/AP_DECLARE_STATIC
82 * Apache Core dso functions are declared with AP_DECLARE(), so they may
83 * use the most appropriate calling convention. Hook functions and other
84 * Core functions with variable arguments must use AP_DECLARE_NONSTD().
86 * @deffunc AP_DECLARE(rettype) ap_func(args)
88 #define AP_DECLARE(type) type
91 * Apache Core dso variable argument and hook functions are declared with
92 * AP_DECLARE_NONSTD(), as they must use the C language calling convention.
94 * @deffunc AP_DECLARE_NONSTD(rettype) ap_func(args [...])
96 #define AP_DECLARE_NONSTD(type) type
99 * Apache Core dso variables are declared with AP_MODULE_DECLARE_DATA.
100 * This assures the appropriate indirection is invoked at compile time.
102 * @tip extern AP_DECLARE_DATA type apr_variable; syntax is required for
103 * declarations within headers to properly import the variable.
104 * @deffunc AP_DECLARE_DATA type apr_variable
106 #define AP_DECLARE_DATA
108 #elif defined(AP_DECLARE_STATIC)
109 #define AP_DECLARE(type) type __stdcall
110 #define AP_DECLARE_NONSTD(type) type
111 #define AP_DECLARE_DATA
112 #elif defined(AP_DECLARE_EXPORT)
113 #define AP_DECLARE(type) __declspec(dllexport) type __stdcall
114 #define AP_DECLARE_NONSTD(type) __declspec(dllexport) type
115 #define AP_DECLARE_DATA __declspec(dllexport)
117 #define AP_DECLARE(type) __declspec(dllimport) type __stdcall
118 #define AP_DECLARE_NONSTD(type) __declspec(dllimport) type
119 #define AP_DECLARE_DATA __declspec(dllimport)
122 #if !defined(WIN32) || defined(AP_MODULE_DECLARE_STATIC)
124 * Declare a dso module's exported module structure as AP_MODULE_DECLARE_DATA.
126 * Unless AP_MODULE_DECLARE_STATIC is defined at compile time, symbols
127 * declared with AP_MODULE_DECLARE_DATA are always exported.
129 * @deffunc module AP_MODULE_DECLARE_DATA mod_tag
131 #define AP_MODULE_DECLARE_DATA
134 * AP_MODULE_DECLARE_EXPORT is a no-op. Unless contradicted by the
135 * AP_MODULE_DECLARE_STATIC compile-time symbol, it is assumed and defined.
137 * The old SHARED_MODULE compile-time symbol is now the default behavior,
138 * so it is no longer referenced anywhere with Apache 2.0.
140 * @deffunc AP_MODULE_DECLARE_EXPORT
142 #define AP_MODULE_DECLARE_EXPORT
143 #define AP_MODULE_DECLARE_DATA __declspec(dllexport)
147 * @package Hook Functions
150 #define AP_DECLARE_HOOK(ret,name,args) \
151 APR_DECLARE_EXTERNAL_HOOK(ap,AP,ret,name,args)
153 #define AP_IMPLEMENT_HOOK_BASE(name) \
154 APR_IMPLEMENT_EXTERNAL_HOOK_BASE(ap,AP,name)
157 * Implement an Apache core hook that has no return code, and
158 * therefore runs all of the registered functions. The implementation
159 * is called ap_run_<I>name</I>.
161 * @param name The name of the hook
162 * @param args_decl The declaration of the arguments for the hook, for example
164 * @param args_use The arguments for the hook as used in a call, for example
166 * @tip If IMPLEMENTing a hook that is not linked into the Apache core,
167 * (e.g. within a dso) see APR_IMPLEMENT_EXTERNAL_HOOK_VOID.
168 * @deffunc AP_IMPLEMENT_HOOK_VOID(name, args_decl, args_use)
170 #define AP_IMPLEMENT_HOOK_VOID(name,args_decl,args_use) \
171 APR_IMPLEMENT_EXTERNAL_HOOK_VOID(ap,AP,name,args_decl,args_use)
174 * Implement an Apache core hook that runs until one of the functions
175 * returns something other than ok or decline. That return value is
176 * then returned from the hook runner. If the hooks run to completion,
177 * then ok is returned. Note that if no hook runs it would probably be
178 * more correct to return decline, but this currently does not do
179 * so. The implementation is called ap_run_<I>name</I>.
181 * @param ret The return type of the hook (and the hook runner)
182 * @param name The name of the hook
183 * @param args_decl The declaration of the arguments for the hook, for example
185 * @param args_use The arguments for the hook as used in a call, for example
187 * @param ok The "ok" return value
188 * @param decline The "decline" return value
189 * @return ok, decline or an error.
190 * @tip If IMPLEMENTing a hook that is not linked into the Apache core,
191 * (e.g. within a dso) see APR_IMPLEMENT_EXTERNAL_HOOK_RUN_ALL.
192 * @deffunc AP_IMPLEMENT_HOOK_RUN_ALL(ret, name, args_decl, args_use, ok, decline)
194 #define AP_IMPLEMENT_HOOK_RUN_ALL(ret,name,args_decl,args_use,ok,decline) \
195 APR_IMPLEMENT_EXTERNAL_HOOK_RUN_ALL(ap,AP,ret,name,args_decl, \
199 * Implement a hook that runs until the first function that returns
200 * something other than decline. If all functions return decline, the
201 * hook runner returns decline. The implementation is called
202 * ap_run_<I>name</I>.
204 * @param ret The return type of the hook (and the hook runner)
205 * @param name The name of the hook
206 * @param args_decl The declaration of the arguments for the hook, for example
208 * @param args_use The arguments for the hook as used in a call, for example
210 * @param decline The "decline" return value
211 * @return decline or an error.
212 * @tip If IMPLEMENTing a hook that is not linked into the Apache core
213 * (e.g. within a dso) see APR_IMPLEMENT_EXTERNAL_HOOK_RUN_FIRST.
214 * @deffunc AP_IMPLEMENT_HOOK_RUN_FIRST(ret, name, args_decl, args_use, decline)
216 #define AP_IMPLEMENT_HOOK_RUN_FIRST(ret,name,args_decl,args_use,decline) \
217 APR_IMPLEMENT_EXTERNAL_HOOK_RUN_FIRST(ap,AP,ret,name,args_decl, \
222 #include "ap_config_auto.h"
226 /* TODO - We need to put OS detection back to make all the following work */
228 #if defined(SUNOS4) || defined(IRIX) || defined(NEXT) || defined(AUX3) \
229 || defined (UW) || defined(LYNXOS) || defined(TPF)
230 /* These systems don't do well with any lingering close code; I don't know
235 /* XXX - The PHP4 comments say -D_HPUX_SOURCE is obsolete. */
237 /* TODO - none of the dynamic linking defines are in yet, but that's because
238 * Manoj needs to learn what the exact ramifications of libtool on DSOs are */
243 #if APR_FILE_BASED_SHM
244 #define AP_USE_FILE_BASED_SCOREBOARD
246 #define AP_USE_MEM_BASED_SCOREBOARD
249 /* If APR has OTHER_CHILD logic, use reliable piped logs.
251 #if APR_HAS_OTHER_CHILD
252 #define AP_HAVE_RELIABLE_PIPED_LOGS TRUE
255 #if APR_CHARSET_EBCDIC && !defined(APACHE_XLATE)
259 #endif /* AP_CONFIG_H */