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/*
* Copyright © 2008 Kristian Høgsberg
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#include <stdlib.h>
#include <stdint.h>
#include <stddef.h>
#include <stdio.h>
#include <stdbool.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <ctype.h>
#include <assert.h>
#include <fcntl.h>
#include <sys/poll.h>
#include "connection.h"
#include "wayland-util.h"
#include "wayland-client.h"
struct wl_global_listener {
wl_display_global_func_t handler;
void *data;
struct wl_list link;
};
struct wl_proxy {
struct wl_object object;
struct wl_display *display;
void *user_data;
};
struct wl_global {
uint32_t id;
char *interface;
uint32_t version;
struct wl_list link;
};
struct wl_display {
struct wl_proxy proxy;
struct wl_connection *connection;
int fd;
uint32_t mask;
struct wl_map objects;
struct wl_list global_listener_list;
struct wl_list global_list;
wl_display_update_func_t update;
void *update_data;
wl_display_global_func_t global_handler;
void *global_handler_data;
};
static int wl_debug = 0;
static int
connection_update(struct wl_connection *connection,
uint32_t mask, void *data)
{
struct wl_display *display = data;
display->mask = mask;
if (display->update)
return display->update(display->mask,
display->update_data);
return 0;
}
WL_EXPORT struct wl_global_listener *
wl_display_add_global_listener(struct wl_display *display,
wl_display_global_func_t handler, void *data)
{
struct wl_global_listener *listener;
struct wl_global *global;
listener = malloc(sizeof *listener);
if (listener == NULL)
return NULL;
listener->handler = handler;
listener->data = data;
wl_list_insert(display->global_listener_list.prev, &listener->link);
wl_list_for_each(global, &display->global_list, link)
(*listener->handler)(display, global->id, global->interface,
global->version, listener->data);
return listener;
}
WL_EXPORT void
wl_display_remove_global_listener(struct wl_display *display,
struct wl_global_listener *listener)
{
wl_list_remove(&listener->link);
free(listener);
}
WL_EXPORT struct wl_proxy *
wl_proxy_create(struct wl_proxy *factory, const struct wl_interface *interface)
{
struct wl_proxy *proxy;
struct wl_display *display = factory->display;
proxy = malloc(sizeof *proxy);
if (proxy == NULL)
return NULL;
proxy->object.interface = interface;
proxy->object.implementation = NULL;
proxy->object.id = wl_map_insert_new(&display->objects, proxy);
proxy->display = display;
return proxy;
}
WL_EXPORT void
wl_proxy_destroy(struct wl_proxy *proxy)
{
wl_map_remove(&proxy->display->objects, proxy->object.id);
free(proxy);
}
WL_EXPORT int
wl_proxy_add_listener(struct wl_proxy *proxy,
void (**implementation)(void), void *data)
{
if (proxy->object.implementation) {
fprintf(stderr, "proxy already has listener\n");
return -1;
}
proxy->object.implementation = implementation;
proxy->user_data = data;
return 0;
}
WL_EXPORT void
wl_proxy_marshal(struct wl_proxy *proxy, uint32_t opcode, ...)
{
struct wl_closure *closure;
va_list ap;
va_start(ap, opcode);
closure = wl_connection_vmarshal(proxy->display->connection,
&proxy->object, opcode, ap,
&proxy->object.interface->methods[opcode]);
va_end(ap);
wl_closure_send(closure, proxy->display->connection);
if (wl_debug)
wl_closure_print(closure, &proxy->object, true);
wl_closure_destroy(closure);
}
/* Can't do this, there may be more than one instance of an
* interface... */
WL_EXPORT uint32_t
wl_display_get_global(struct wl_display *display,
const char *interface, uint32_t version)
{
struct wl_global *global;
wl_list_for_each(global, &display->global_list, link)
if (strcmp(interface, global->interface) == 0 &&
version <= global->version)
return global->id;
return 0;
}
static void
display_handle_error(void *data,
struct wl_display *display, struct wl_object *object,
uint32_t code, const char *message)
{
fprintf(stderr, "%s@%d: error %d: %s\n",
object->interface->name, object->id, code, message);
abort();
}
static void
display_handle_global(void *data,
struct wl_display *display,
uint32_t id, const char *interface, uint32_t version)
{
struct wl_global_listener *listener;
struct wl_global *global;
global = malloc(sizeof *global);
global->id = id;
global->interface = strdup(interface);
global->version = version;
wl_list_insert(display->global_list.prev, &global->link);
wl_list_for_each(listener, &display->global_listener_list, link)
(*listener->handler)(display,
id, interface, version, listener->data);
}
static void
display_handle_global_remove(void *data,
struct wl_display *display, uint32_t id)
{
struct wl_global *global;
wl_list_for_each(global, &display->global_list, link)
if (global->id == id) {
wl_list_remove(&global->link);
free(global);
break;
}
}
static const struct wl_display_listener display_listener = {
display_handle_error,
display_handle_global,
display_handle_global_remove,
};
static int
connect_to_socket(struct wl_display *display, const char *name)
{
struct sockaddr_un addr;
socklen_t size;
const char *runtime_dir;
size_t name_size;
display->fd = socket(PF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0);
if (display->fd < 0)
return -1;
runtime_dir = getenv("XDG_RUNTIME_DIR");
if (runtime_dir == NULL) {
runtime_dir = ".";
fprintf(stderr,
"XDG_RUNTIME_DIR not set, falling back to %s\n",
runtime_dir);
}
if (name == NULL)
name = getenv("WAYLAND_DISPLAY");
if (name == NULL)
name = "wayland-0";
memset(&addr, 0, sizeof addr);
addr.sun_family = AF_LOCAL;
name_size =
snprintf(addr.sun_path, sizeof addr.sun_path,
"%s/%s", runtime_dir, name) + 1;
size = offsetof (struct sockaddr_un, sun_path) + name_size;
if (connect(display->fd, (struct sockaddr *) &addr, size) < 0) {
close(display->fd);
return -1;
}
return 0;
}
WL_EXPORT struct wl_display *
wl_display_connect(const char *name)
{
struct wl_display *display;
const char *debug;
char *connection, *end;
int flags;
debug = getenv("WAYLAND_DEBUG");
if (debug)
wl_debug = 1;
display = malloc(sizeof *display);
if (display == NULL)
return NULL;
memset(display, 0, sizeof *display);
connection = getenv("WAYLAND_SOCKET");
if (connection) {
display->fd = strtol(connection, &end, 0);
if (*end != '\0') {
free(display);
return NULL;
}
flags = fcntl(display->fd, F_GETFD);
if (flags != -1)
fcntl(display->fd, F_SETFD, flags | FD_CLOEXEC);
} else if (connect_to_socket(display, name) < 0) {
free(display);
return NULL;
}
wl_map_init(&display->objects);
wl_list_init(&display->global_listener_list);
wl_list_init(&display->global_list);
wl_map_insert_new(&display->objects, NULL);
display->proxy.object.interface = &wl_display_interface;
display->proxy.object.id = wl_map_insert_new(&display->objects, display);
display->proxy.display = display;
display->proxy.object.implementation = (void(**)(void)) &display_listener;
display->proxy.user_data = display;
display->connection = wl_connection_create(display->fd,
connection_update, display);
if (display->connection == NULL) {
wl_map_release(&display->objects);
close(display->fd);
free(display);
return NULL;
}
return display;
}
WL_EXPORT void
wl_display_destroy(struct wl_display *display)
{
struct wl_global *global, *gnext;
struct wl_global_listener *listener, *lnext;
wl_connection_destroy(display->connection);
wl_map_release(&display->objects);
wl_list_for_each_safe(global, gnext,
&display->global_list, link)
free(global);
wl_list_for_each_safe(listener, lnext,
&display->global_listener_list, link)
free(listener);
close(display->fd);
free(display);
}
WL_EXPORT int
wl_display_get_fd(struct wl_display *display,
wl_display_update_func_t update, void *data)
{
display->update = update;
display->update_data = data;
display->update(display->mask, display->update_data);
return display->fd;
}
static void
sync_callback(void *data, struct wl_callback *callback, uint32_t time)
{
int *done = data;
*done = 1;
wl_callback_destroy(callback);
}
static const struct wl_callback_listener sync_listener = {
sync_callback
};
WL_EXPORT void
wl_display_roundtrip(struct wl_display *display)
{
struct wl_callback *callback;
int done;
done = 0;
callback = wl_display_sync(display);
wl_callback_add_listener(callback, &sync_listener, &done);
wl_display_flush(display);
while (!done)
wl_display_iterate(display, WL_DISPLAY_READABLE);
}
static void
handle_event(struct wl_display *display,
uint32_t id, uint32_t opcode, uint32_t size)
{
uint32_t p[32];
struct wl_proxy *proxy;
struct wl_closure *closure;
const struct wl_message *message;
wl_connection_copy(display->connection, p, size);
if (id == 1)
proxy = &display->proxy;
else
proxy = wl_map_lookup(&display->objects, id);
if (proxy == NULL || proxy->object.implementation == NULL) {
wl_connection_consume(display->connection, size);
return;
}
message = &proxy->object.interface->events[opcode];
closure = wl_connection_demarshal(display->connection,
size, &display->objects, message);
if (closure == NULL) {
fprintf(stderr, "Error demarshalling event: %m\n");
abort();
}
if (wl_debug)
wl_closure_print(closure, &proxy->object, false);
wl_closure_invoke(closure, &proxy->object,
proxy->object.implementation[opcode],
proxy->user_data);
wl_closure_destroy(closure);
}
WL_EXPORT void
wl_display_iterate(struct wl_display *display, uint32_t mask)
{
uint32_t p[2], object, opcode, size;
int len;
mask &= display->mask;
if (mask == 0) {
fprintf(stderr,
"wl_display_iterate called with unsolicited flags");
return;
}
len = wl_connection_data(display->connection, mask);
while (len > 0) {
if (len < sizeof p)
break;
wl_connection_copy(display->connection, p, sizeof p);
object = p[0];
opcode = p[1] & 0xffff;
size = p[1] >> 16;
if (len < size)
break;
handle_event(display, object, opcode, size);
len -= size;
}
if (len < 0) {
fprintf(stderr, "read error: %m\n");
exit(EXIT_FAILURE);
}
}
WL_EXPORT void
wl_display_flush(struct wl_display *display)
{
while (display->mask & WL_DISPLAY_WRITABLE)
wl_display_iterate (display, WL_DISPLAY_WRITABLE);
}
WL_EXPORT void *
wl_display_bind(struct wl_display *display,
uint32_t name, const struct wl_interface *interface)
{
struct wl_proxy *proxy;
proxy = wl_proxy_create(&display->proxy, interface);
if (proxy == NULL)
return NULL;
wl_proxy_marshal(&display->proxy, WL_DISPLAY_BIND,
name, interface->name, interface->version, proxy);
return proxy;
}
WL_EXPORT struct wl_callback *
wl_display_sync(struct wl_display *display)
{
struct wl_proxy *proxy;
proxy = wl_proxy_create(&display->proxy, &wl_callback_interface);
if (!proxy)
return NULL;
wl_proxy_marshal(&display->proxy, WL_DISPLAY_SYNC, proxy);
return (struct wl_callback *) proxy;
}
WL_EXPORT void
wl_proxy_set_user_data(struct wl_proxy *proxy, void *user_data)
{
proxy->user_data = user_data;
}
WL_EXPORT void *
wl_proxy_get_user_data(struct wl_proxy *proxy)
{
return proxy->user_data;
}
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