diff options
Diffstat (limited to 'include/set-hooks.h')
| -rw-r--r-- | include/set-hooks.h | 33 |
1 files changed, 23 insertions, 10 deletions
diff --git a/include/set-hooks.h b/include/set-hooks.h index 995bdf4..1666485 100644 --- a/include/set-hooks.h +++ b/include/set-hooks.h @@ -1,5 +1,5 @@ /* Macros for using symbol sets for running lists of functions. - Copyright (C) 1994, 1995, 1997 Free Software Foundation, Inc. + Copyright (C) 1994, 1995, 1997, 2000 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -24,34 +24,47 @@ #include <stddef.h> #include <sys/cdefs.h> +#ifdef symbol_set_define /* Define a hook variable called NAME. Functions put on this hook take arguments described by PROTO. Use `text_set_element (NAME, FUNCTION)' from gnu-stabs.h to add a function to the hook. */ -#define DEFINE_HOOK(NAME, PROTO) \ +# define DEFINE_HOOK(NAME, PROTO) \ typedef void __##NAME##_hook_function_t PROTO; \ symbol_set_define (NAME) -#define DECLARE_HOOK(NAME, PROTO) \ +# define DECLARE_HOOK(NAME, PROTO) \ typedef void __##NAME##_hook_function_t PROTO;\ symbol_set_declare (NAME) /* Run all the functions hooked on the set called NAME. Each function is called like this: `function ARGS'. */ -#define RUN_HOOK(NAME, ARGS) \ -do { \ - void *const *ptr; \ - for (ptr = symbol_set_first_element (NAME); \ - ! symbol_set_end_p (NAME, ptr); ++ptr) \ - (*(__##NAME##_hook_function_t *) *ptr) ARGS; \ +# define RUN_HOOK(NAME, ARGS) \ +do { \ + void *const *ptr; \ + for (ptr = symbol_set_first_element (NAME); \ + ! symbol_set_end_p (NAME, ptr); ++ptr) \ + (*(__##NAME##_hook_function_t *) *ptr) ARGS; \ } while (0) /* Define a hook variable with NAME and PROTO, and a function called RUNNER which calls each function on the hook in turn, with ARGS. */ -#define DEFINE_HOOK_RUNNER(name, runner, proto, args) \ +# define DEFINE_HOOK_RUNNER(name, runner, proto, args) \ DEFINE_HOOK (name, proto); void runner proto { RUN_HOOK (name, args); } +#else + +/* The system does not provide necessary support for this. */ +# define DEFINE_HOOK(NAME, PROTO) + +# define DECLARE_HOOK(NAME, PROTO) + +# define RUN_HOOK(NAME, ARGS) + +# define DEFINE_HOOK_RUNNER(name, runner, proto, args) + +#endif #endif /* set-hooks.h */ |