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59 #include "apr_hooks.h"
60 #include "apr_optional_hooks.h"
64 * @brief Symbol export macros and hook functions
67 /* Although this file doesn't declare any hooks, declare the hook group here */
68 /** @defgroup hooks Apache Hooks */
71 /* define these just so doxygen documents them */
74 * AP_DECLARE_STATIC is defined when including Apache's Core headers,
75 * to provide static linkage when the dynamic library may be unavailable.
77 * @see AP_DECLARE_EXPORT
79 * AP_DECLARE_STATIC and AP_DECLARE_EXPORT are left undefined when
80 * including Apache's Core headers, to import and link the symbols from the
81 * dynamic Apache Core library and assure appropriate indirection and calling
82 * conventions at compile time.
84 # define AP_DECLARE_STATIC
86 * AP_DECLARE_EXPORT is defined when building the Apache Core dynamic
87 * library, so that all public symbols are exported.
89 * @see AP_DECLARE_STATIC
91 # define AP_DECLARE_EXPORT
93 #endif /* def DOXYGEN */
97 * Apache Core dso functions are declared with AP_DECLARE(), so they may
98 * use the most appropriate calling convention. Hook functions and other
99 * Core functions with variable arguments must use AP_DECLARE_NONSTD().
101 * AP_DECLARE(rettype) ap_func(args)
104 #define AP_DECLARE(type) type
107 * Apache Core dso variable argument and hook functions are declared with
108 * AP_DECLARE_NONSTD(), as they must use the C language calling convention.
111 * AP_DECLARE_NONSTD(rettype) ap_func(args [...])
114 #define AP_DECLARE_NONSTD(type) type
117 * Apache Core dso variables are declared with AP_MODULE_DECLARE_DATA.
118 * This assures the appropriate indirection is invoked at compile time.
120 * @note AP_DECLARE_DATA extern type apr_variable; syntax is required for
121 * declarations within headers to properly import the variable.
123 * AP_DECLARE_DATA type apr_variable
126 #define AP_DECLARE_DATA
128 #elif defined(AP_DECLARE_STATIC)
129 #define AP_DECLARE(type) type __stdcall
130 #define AP_DECLARE_NONSTD(type) type
131 #define AP_DECLARE_DATA
132 #elif defined(AP_DECLARE_EXPORT)
133 #define AP_DECLARE(type) __declspec(dllexport) type __stdcall
134 #define AP_DECLARE_NONSTD(type) __declspec(dllexport) type
135 #define AP_DECLARE_DATA __declspec(dllexport)
137 #define AP_DECLARE(type) __declspec(dllimport) type __stdcall
138 #define AP_DECLARE_NONSTD(type) __declspec(dllimport) type
139 #define AP_DECLARE_DATA __declspec(dllimport)
142 #if !defined(WIN32) || defined(AP_MODULE_DECLARE_STATIC)
144 * Declare a dso module's exported module structure as AP_MODULE_DECLARE_DATA.
146 * Unless AP_MODULE_DECLARE_STATIC is defined at compile time, symbols
147 * declared with AP_MODULE_DECLARE_DATA are always exported.
149 * module AP_MODULE_DECLARE_DATA mod_tag
153 #define AP_MODULE_DECLARE(type) type __stdcall
155 #define AP_MODULE_DECLARE(type) type
157 #define AP_MODULE_DECLARE_NONSTD(type) type
158 #define AP_MODULE_DECLARE_DATA
161 * AP_MODULE_DECLARE_EXPORT is a no-op. Unless contradicted by the
162 * AP_MODULE_DECLARE_STATIC compile-time symbol, it is assumed and defined.
164 * The old SHARED_MODULE compile-time symbol is now the default behavior,
165 * so it is no longer referenced anywhere with Apache 2.0.
167 #define AP_MODULE_DECLARE_EXPORT
168 #define AP_MODULE_DECLARE(type) __declspec(dllexport) type __stdcall
169 #define AP_MODULE_DECLARE_NONSTD(type) __declspec(dllexport) type
170 #define AP_MODULE_DECLARE_DATA __declspec(dllexport)
174 * Declare a hook function
175 * @param ret The return type of the hook
176 * @param name The hook's name (as a literal)
177 * @param args The arguments the hook function takes, in brackets.
179 #define AP_DECLARE_HOOK(ret,name,args) \
180 APR_DECLARE_EXTERNAL_HOOK(ap,AP,ret,name,args)
183 #define AP_IMPLEMENT_HOOK_BASE(name) \
184 APR_IMPLEMENT_EXTERNAL_HOOK_BASE(ap,AP,name)
187 * Implement an Apache core hook that has no return code, and
188 * therefore runs all of the registered functions. The implementation
189 * is called ap_run_<i>name</i>.
191 * @param name The name of the hook
192 * @param args_decl The declaration of the arguments for the hook, for example
194 * @param args_use The arguments for the hook as used in a call, for example
196 * @note If IMPLEMENTing a hook that is not linked into the Apache core,
197 * (e.g. within a dso) see APR_IMPLEMENT_EXTERNAL_HOOK_VOID.
199 #define AP_IMPLEMENT_HOOK_VOID(name,args_decl,args_use) \
200 APR_IMPLEMENT_EXTERNAL_HOOK_VOID(ap,AP,name,args_decl,args_use)
203 * Implement an Apache core hook that runs until one of the functions
204 * returns something other than ok or decline. That return value is
205 * then returned from the hook runner. If the hooks run to completion,
206 * then ok is returned. Note that if no hook runs it would probably be
207 * more correct to return decline, but this currently does not do
208 * so. The implementation is called ap_run_<i>name</i>.
210 * @param ret The return type of the hook (and the hook runner)
211 * @param name The name of the hook
212 * @param args_decl The declaration of the arguments for the hook, for example
214 * @param args_use The arguments for the hook as used in a call, for example
216 * @param ok The "ok" return value
217 * @param decline The "decline" return value
218 * @return ok, decline or an error.
219 * @note If IMPLEMENTing a hook that is not linked into the Apache core,
220 * (e.g. within a dso) see APR_IMPLEMENT_EXTERNAL_HOOK_RUN_ALL.
222 #define AP_IMPLEMENT_HOOK_RUN_ALL(ret,name,args_decl,args_use,ok,decline) \
223 APR_IMPLEMENT_EXTERNAL_HOOK_RUN_ALL(ap,AP,ret,name,args_decl, \
227 * Implement a hook that runs until a function returns something other than
228 * decline. If all functions return decline, the hook runner returns decline.
229 * The implementation is called ap_run_<i>name</i>.
231 * @param ret The return type of the hook (and the hook runner)
232 * @param name The name of the hook
233 * @param args_decl The declaration of the arguments for the hook, for example
235 * @param args_use The arguments for the hook as used in a call, for example
237 * @param decline The "decline" return value
238 * @return decline or an error.
239 * @note If IMPLEMENTing a hook that is not linked into the Apache core
240 * (e.g. within a dso) see APR_IMPLEMENT_EXTERNAL_HOOK_RUN_FIRST.
242 #define AP_IMPLEMENT_HOOK_RUN_FIRST(ret,name,args_decl,args_use,decline) \
243 APR_IMPLEMENT_EXTERNAL_HOOK_RUN_FIRST(ap,AP,ret,name,args_decl, \
246 /* Note that the other optional hook implementations are straightforward but
247 * have not yet been needed
251 * Implement an optional hook. This is exactly the same as a standard hook
252 * implementation, except the hook is optional.
253 * @see AP_IMPLEMENT_HOOK_RUN_ALL
255 #define AP_IMPLEMENT_OPTIONAL_HOOK_RUN_ALL(ret,name,args_decl,args_use,ok, \
257 APR_IMPLEMENT_OPTIONAL_HOOK_RUN_ALL(ap,AP,ret,name,args_decl, \
261 * Hook an optional hook. Unlike static hooks, this uses a macro instead of a
264 #define AP_OPTIONAL_HOOK(name,fn,pre,succ,order) \
265 APR_OPTIONAL_HOOK(ap,name,fn,pre,succ,order)
268 #if !defined(WIN32) && !defined(NETWARE)
269 #include "ap_config_auto.h"
270 #include "ap_config_layout.h"
273 /* TODO - We need to put OS detection back to make all the following work */
275 #if defined(SUNOS4) || defined(IRIX) || defined(NEXT) || defined(AUX3) \
276 || defined (UW) || defined(LYNXOS) || defined(TPF)
277 /* These systems don't do well with any lingering close code; I don't know
282 /* If APR has OTHER_CHILD logic, use reliable piped logs. */
283 #if APR_HAS_OTHER_CHILD
284 #define AP_HAVE_RELIABLE_PIPED_LOGS TRUE
287 #if APR_CHARSET_EBCDIC && !defined(APACHE_XLATE)
291 #endif /* AP_CONFIG_H */