Ho, many thanks Emmanuel. I will deeply study your mail.
By the way, I am busy to translate all the "steps" demos of the Wayland-book into Pascal: https://github.com/fredvs/wayland-pascal Now, Free Pascal compiler can create nice and working "Pure Wayland applications". Note too that the C demos in Wayland-book have some ommisions in code ( I added the fixes in /src/c). But for the "Keyboard events" step, I am blocked, the C "Keyboard events" demo in /src/c does not use the key-map, but it works to give the actions of the keys and the number of the keys. The same for the translated Pascal code. But ok, I will try to make the map-keyboard working thanks to with your advices. Many thanks. Write you later. Fre;D ________________________________ De : Emmanuel Gil Peyrot <linkma...@linkmauve.fr> Envoyé : mercredi 4 octobre 2023 20:28 À : Fred vS <fi...@hotmail.com> Cc : wayland-devel@lists.freedesktop.org <wayland-devel@lists.freedesktop.org> Objet : Re: Problem with mmap keyboard. On Wed, Oct 04, 2023 at 06:19:30PM +0000, Fred vS wrote: > Hello. Hi, > > > I try to make work the "Keyboard event" step from the Wayland-book but the C > demo crash at loading. > > The problem comes from the mapping: with that error: > > > Line 301: wl_keyboard_keymap: Assertion map_shm != MAP_FAILED' failed. > > > Here is the function: > > static void > wl_keyboard_keymap(void *data, struct wl_keyboard *wl_keyboard, > uint32_t format, int32_t fd, uint32_t size) > { > struct client_state *client_state = data; > assert(format == WL_KEYBOARD_KEYMAP_FORMAT_XKB_V1); > > // Line 301: Here problem with mapping > char *map_shm = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0); We can read in the documentation of this protocol: https://wayland.app/protocols/wayland#wl_keyboard:event:keymap “From version 7 onwards, the fd must be mapped with MAP_PRIVATE by the recipient, as MAP_SHARED may fail.” I don’t know which wl_shell version you are using, but check that maybe. > assert(map_shm != MAP_FAILED); > > struct xkb_keymap *xkb_keymap = xkb_keymap_new_from_string( > client_state->xkb_context, map_shm, > XKB_KEYMAP_FORMAT_TEXT_V1, XKB_KEYMAP_COMPILE_NO_FLAGS); > munmap(map_shm, size); > close(fd); > > struct xkb_state *xkb_state = xkb_state_new(xkb_keymap); > xkb_keymap_unref(client_state->xkb_keymap); > xkb_state_unref(client_state->xkb_state); > client_state->xkb_keymap = xkb_keymap; > client_state->xkb_state = xkb_state; > } > > > > Why does the mapping fails, I did check fd and size and they are correctly > assigned? > > > Thanks. > -- Link Mauve
