On Mon, Jul 7, 2014 at 2:36 PM, Benjamin Fritz <fritzophre...@gmail.com> wrote:
> I want to finish up this patch to fix a crash in Vim: > https://groups.google.com/d/topic/vim_dev/dnN58kO5Vg4/discussion > > I changed luaV_setref() to return a value if garbage collection cannot > safely proceed. > > But, I do not know how to get that return value back to the code > calling it from eval.c, via set_ref_in_lua(). Can someone please > explain briefly how the function calls in the LUA interface work? I > cannot figure out how to get a return value back from lua_call(), in > the C code. Here is sample code. #include <lua.h> #include <lauxlib.h> #include <stdio.h> /* int add(int x, int y) */ int add(lua_State *L) { int x = lua_tointeger(L, 1); int y = lua_tointeger(L, 2); /* push result to stack */ lua_pushinteger(L, x + y); /* return number of results */ return 1; } int main() { lua_State *L; int r; L = luaL_newstate(); /* r = add(111, 222) */ lua_pushcclosure(L, add, 0); lua_pushinteger(L, 111); lua_pushinteger(L, 222); lua_call(L, 2 /* nargs */, 1 /* nresults */); /* get results */ r = lua_tointeger(L, -1); /* remove results from stack */ lua_pop(L, 1); printf("add(111, 222) => %d\n", r); lua_close(L); return 0; } -- Yukihiro Nakadaira - yukihiro.nakada...@gmail.com -- -- You received this message from the "vim_dev" maillist. Do not top-post! Type your reply below the text you are replying to. For more information, visit http://www.vim.org/maillist.php --- You received this message because you are subscribed to the Google Groups "vim_dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to vim_dev+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
