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weston/wayland.c

442 lines
11 KiB

/*
* 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 <stdarg.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <dlfcn.h>
#include <assert.h>
#include <ffi.h>
#include "wayland-protocol.h"
#include "wayland.h"
#include "connection.h"
struct wl_client {
struct wl_connection *connection;
struct wl_event_source *source;
struct wl_display *display;
struct wl_list surface_list;
struct wl_list link;
uint32_t id_count;
};
struct wl_display {
struct wl_object base;
struct wl_event_loop *loop;
struct wl_hash_table *objects;
struct wl_list pending_frame_list;
uint32_t client_id_range;
uint32_t id;
struct wl_list global_list;
};
struct wl_global {
struct wl_object *object;
wl_client_connect_func_t func;
struct wl_list link;
};
void
wl_client_destroy(struct wl_client *client);
WL_EXPORT void
wl_client_post_event(struct wl_client *client, struct wl_object *sender,
uint32_t opcode, ...)
{
va_list ap;
va_start(ap, opcode);
wl_connection_vmarshal(client->connection,
sender, opcode, ap,
&sender->interface->events[opcode]);
va_end(ap);
}
static void
wl_client_connection_data(int fd, uint32_t mask, void *data)
{
struct wl_client *client = data;
struct wl_connection *connection = client->connection;
struct wl_object *object;
uint32_t p[2], opcode, size;
uint32_t cmask = 0;
int len;
if (mask & WL_EVENT_READABLE)
cmask |= WL_CONNECTION_READABLE;
if (mask & WL_EVENT_WRITEABLE)
cmask |= WL_CONNECTION_WRITABLE;
len = wl_connection_data(connection, cmask);
if (len < 0) {
wl_client_destroy(client);
return;
}
while (len >= sizeof p) {
wl_connection_copy(connection, p, sizeof p);
opcode = p[1] & 0xffff;
size = p[1] >> 16;
if (len < size)
break;
object = wl_hash_table_lookup(client->display->objects, p[0]);
if (object == NULL) {
wl_client_post_event(client, &client->display->base,
WL_DISPLAY_INVALID_OBJECT, p[0]);
wl_connection_consume(connection, size);
len -= size;
continue;
}
if (opcode >= object->interface->method_count) {
wl_client_post_event(client, &client->display->base,
WL_DISPLAY_INVALID_METHOD, p[0], opcode);
wl_connection_consume(connection, size);
len -= size;
continue;
}
wl_connection_demarshal(client->connection,
size,
client->display->objects,
object->implementation[opcode],
client,
object,
&object->interface->methods[opcode]);
wl_connection_consume(connection, size);
len -= size;
}
}
static int
wl_client_connection_update(struct wl_connection *connection,
uint32_t mask, void *data)
{
struct wl_client *client = data;
uint32_t emask = 0;
if (mask & WL_CONNECTION_READABLE)
emask |= WL_EVENT_READABLE;
if (mask & WL_CONNECTION_WRITABLE)
emask |= WL_EVENT_WRITEABLE;
return wl_event_source_fd_update(client->source, mask);
}
static void
wl_display_post_range(struct wl_display *display, struct wl_client *client)
{
wl_client_post_event(client, &client->display->base,
WL_DISPLAY_RANGE, display->client_id_range);
display->client_id_range += 256;
client->id_count += 256;
}
static struct wl_client *
wl_client_create(struct wl_display *display, int fd)
{
struct wl_client *client;
struct wl_global *global;
client = malloc(sizeof *client);
if (client == NULL)
return NULL;
memset(client, 0, sizeof *client);
client->display = display;
client->source = wl_event_loop_add_fd(display->loop, fd,
WL_EVENT_READABLE,
wl_client_connection_data, client);
client->connection =
wl_connection_create(fd, wl_client_connection_update, client);
wl_list_init(&client->surface_list);
wl_list_init(&client->link);
wl_display_post_range(display, client);
wl_list_for_each(global, &display->global_list, link)
wl_client_post_event(client, &client->display->base,
WL_DISPLAY_GLOBAL,
global->object,
global->object->interface->name,
global->object->interface->version);
wl_list_for_each(global, &display->global_list, link)
if (global->func)
global->func(client, global->object);
return client;
}
static void
wl_object_destroy(struct wl_object *object)
{
const struct wl_surface_interface *interface =
(const struct wl_surface_interface *) object->implementation;
/* FIXME: Need generic object destructor. */
interface->destroy(NULL, (struct wl_surface *) object);
}
void
wl_client_destroy(struct wl_client *client)
{
struct wl_surface *surface;
printf("disconnect from client %p\n", client);
wl_list_remove(&client->link);
while (client->surface_list.next != &client->surface_list) {
surface = container_of(client->surface_list.next,
struct wl_surface, link);
wl_list_remove(&surface->link);
wl_object_destroy(&surface->base);
}
wl_event_source_remove(client->source);
wl_connection_destroy(client->connection);
free(client);
}
WL_EXPORT int
wl_client_add_surface(struct wl_client *client,
struct wl_surface *surface,
const struct wl_surface_interface *implementation,
uint32_t id)
{
struct wl_display *display = client->display;
if (client->id_count-- < 64)
wl_display_post_range(display, client);
surface->base.id = id;
surface->base.interface = &wl_surface_interface;
surface->base.implementation = (void (**)(void)) implementation;
surface->client = client;
wl_hash_table_insert(display->objects, id, surface);
wl_list_insert(client->surface_list.prev, &surface->link);
return 0;
}
WL_EXPORT void
wl_client_remove_surface(struct wl_client *client,
struct wl_surface *surface)
{
struct wl_display *display = client->display;
wl_hash_table_remove(display->objects, surface->base.id);
wl_list_remove(&surface->link);
}
WL_EXPORT void
wl_client_send_acknowledge(struct wl_client *client,
struct wl_compositor *compositor,
uint32_t key, uint32_t frame)
{
wl_list_remove(&client->link);
wl_list_insert(client->display->pending_frame_list.prev,
&client->link);
wl_client_post_event(client, &compositor->base,
WL_COMPOSITOR_ACKNOWLEDGE, key, frame);
}
WL_EXPORT int
wl_display_set_compositor(struct wl_display *display,
struct wl_compositor *compositor,
const struct wl_compositor_interface *implementation)
{
compositor->base.interface = &wl_compositor_interface;
compositor->base.implementation = (void (**)(void)) implementation;
wl_display_add_object(display, &compositor->base);
if (wl_display_add_global(display, &compositor->base, NULL))
return -1;
return 0;
}
WL_EXPORT struct wl_display *
wl_display_create(void)
{
struct wl_display *display;
display = malloc(sizeof *display);
if (display == NULL)
return NULL;
display->loop = wl_event_loop_create();
if (display->loop == NULL) {
free(display);
return NULL;
}
display->objects = wl_hash_table_create();
if (display->objects == NULL) {
free(display);
return NULL;
}
wl_list_init(&display->pending_frame_list);
wl_list_init(&display->global_list);
display->client_id_range = 256; /* Gah, arbitrary... */
display->id = 1;
display->base.interface = &wl_display_interface;
display->base.implementation = NULL;
wl_display_add_object(display, &display->base);
if (wl_display_add_global(display, &display->base, NULL)) {
wl_event_loop_destroy(display->loop);
free(display);
return NULL;
}
return display;
}
WL_EXPORT void
wl_display_add_object(struct wl_display *display, struct wl_object *object)
{
object->id = display->id++;
wl_hash_table_insert(display->objects, object->id, object);
}
WL_EXPORT int
wl_display_add_global(struct wl_display *display,
struct wl_object *object, wl_client_connect_func_t func)
{
struct wl_global *global;
global = malloc(sizeof *global);
if (global == NULL)
return -1;
global->object = object;
global->func = func;
wl_list_insert(display->global_list.prev, &global->link);
return 0;
}
WL_EXPORT void
wl_surface_post_event(struct wl_surface *surface,
struct wl_object *sender,
uint32_t event, ...)
{
va_list ap;
va_start(ap, event);
wl_connection_vmarshal(surface->client->connection,
sender, event, ap,
&sender->interface->events[event]);
va_end(ap);
}
WL_EXPORT void
wl_display_post_frame(struct wl_display *display,
struct wl_compositor *compositor,
uint32_t frame, uint32_t msecs)
{
struct wl_client *client;
wl_list_for_each(client, &display->pending_frame_list, link)
wl_client_post_event(client, &compositor->base,
WL_COMPOSITOR_FRAME, frame, msecs);
wl_list_remove(&display->pending_frame_list);
wl_list_init(&display->pending_frame_list);
}
WL_EXPORT struct wl_event_loop *
wl_display_get_event_loop(struct wl_display *display)
{
return display->loop;
}
WL_EXPORT void
wl_display_run(struct wl_display *display)
{
while (1)
wl_event_loop_wait(display->loop);
}
static void
socket_data(int fd, uint32_t mask, void *data)
{
struct wl_display *display = data;
struct sockaddr_un name;
socklen_t length;
int client_fd;
length = sizeof name;
client_fd = accept (fd, (struct sockaddr *) &name, &length);
if (client_fd < 0)
fprintf(stderr, "failed to accept\n");
wl_client_create(display, client_fd);
}
WL_EXPORT int
wl_display_add_socket(struct wl_display *display,
const char *name, size_t name_size)
{
struct sockaddr_un addr;
int sock;
socklen_t size;
sock = socket(PF_LOCAL, SOCK_STREAM, 0);
if (sock < 0)
return -1;
addr.sun_family = AF_LOCAL;
memcpy(addr.sun_path, name, name_size);
size = offsetof (struct sockaddr_un, sun_path) + name_size;
if (bind(sock, (struct sockaddr *) &addr, size) < 0)
return -1;
if (listen(sock, 1) < 0)
return -1;
wl_event_loop_add_fd(display->loop, sock,
WL_EVENT_READABLE,
socket_data, display);
return 0;
}