src/modules.h

   1 /*
   2  * ion/modules.h
   3  *
   4  * Copyright (c) Tuomo Valkonen 1999-2001.
   5  * See the included file LICENSE for details.
   6  */
   7
   8 #ifndef INCLUDED_MODULES_H
   9 #define INCLUDED_MODULES_H
  10
  11 #include "common.h"
  12 #include "thing.h"
  13 #include "window.h"
  14
  15 extern bool load_module(const char *name);
  16 extern void call_hooks(const char *hook);
  17 extern void call_hooks_p(const char *hook, void *p);
  18 extern void unload_modules();
  19
  20 extern void *miter_begin(const char *sym);
  21 extern void *miter_next(const char *sym);
  22 extern void miter_end();
  23
  24 typedef void Hook();
  25 typedef bool AltHookB();
  26 typedef void *AltHookP();
  27
  28
  29 #define FOR_ALL_SYMBOLS(VAR, TYPE, SYM) \
  30         for(VAR=(TYPE)miter_begin(SYM);     \
  31                 VAR!=NULL;                      \
  32                 VAR=(TYPE)miter_next(SYM))
  33
  34
  35 #define CALL_HOOKS(HOOK) call_hooks(#HOOK)
  36 #define CALL_HOOKS_P(HOOK, P) call_hooks_p(#HOOK, P)
  37
  38
  39 #define CALL_HOOKS_ARG(NAME, ARGS)                      \
  40 {                                                       \
  41         Hook *hook_tmp_do_not_use;                          \
  42         FOR_ALL_SYMBOLS(hook_tmp_do_not_use, Hook*, #NAME){ \
  43                 althook_tmp_do_not_use ARGS;                    \
  44         }                                                   \
  45         miter_end();                                        \
  46 }
  47
  48
  49 #define CALL_ALT_B_ARG(VAR, NAME, ARGS)                               \
  50 {                                                                     \
  51         AltHookB *althook_tmp_do_not_use;                                 \
  52         VAR=FALSE;                                                        \
  53         FOR_ALL_SYMBOLS(althook_tmp_do_not_use, AltHookB*, #NAME "_alt"){ \
  54                 VAR=althook_tmp_do_not_use ARGS;                              \
  55                 if(VAR)                                                       \
  56                         break;                                                    \
  57         }                                                                 \
  58         miter_end();                                                      \
  59         if(!VAR)                                                          \
  60                 VAR=NAME ARGS;                                                \
  61 }
  62
  63
  64 #define CALL_ALT_P_ARG(VAR, NAME, ARGS)                               \
  65 {                                                                     \
  66         AltHookP *althook_tmp_do_not_use;                                 \
  67         VAR=NULL;                                                         \
  68         FOR_ALL_SYMBOLS(althook_tmp_do_not_use, AltHookP*, #NAME "_alt"){ \
  69                 VAR=althook_tmp_do_not_use ARGS;                              \
  70                 if(VAR!=NULL)                                                 \
  71                         break;                                                    \
  72         }                                                                 \
  73         miter_end();                                                      \
  74         if(VAR==NULL)                                                     \
  75                 VAR=NAME ARGS;                                                \
  76 }
  77
  78 #endif /* INCLUDED_MODULES_H */