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Fixed warning about casts between function pointers

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gcc now warns (with -Wextra) about casts between pointers to different
function types. The type 'void(*)(void)' works as a 'void*' for function
pointers, cleaning the warning.
This commit is contained in:
Roberto Ierusalimschy 2020-04-29 16:37:25 -03:00
parent 0ddc0f47bd
commit a901c505ab
1 changed files with 8 additions and 1 deletions

9
loadlib.c

@ -67,6 +67,13 @@ static const char *const CLIBS = "_CLIBS";
#define setprogdir(L) ((void)0) #define setprogdir(L) ((void)0)
/*
** Special type equivalent to '(void*)' for functions in gcc
** (to supress warnings when converting function pointers)
*/
typedef void (*voidf)(void);
/* /*
** system-dependent functions ** system-dependent functions
*/ */
@ -206,7 +213,7 @@ static void *lsys_load (lua_State *L, const char *path, int seeglb) {
static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym) { static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym) {
lua_CFunction f = (lua_CFunction)GetProcAddress((HMODULE)lib, sym); lua_CFunction f = (lua_CFunction)(voidf)GetProcAddress((HMODULE)lib, sym);
if (f == NULL) pusherror(L); if (f == NULL) pusherror(L);
return f; return f;
} }