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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 <stdint.h>
#include <glib/giochannel.h>
#include "wayland-client.h"
#include "wayland-glib.h"
/**
* A GLib source for events generated by a Wayland display.
*
* source: The base GLib source.
* pfd: The display file descriptor.
* mask: Mask indicating what operations are permitted for this display through
* this source.
* display: The display this source watches.
**/
typedef struct _WlSource {
GSource source;
GPollFD pfd;
uint32_t mask;
struct wl_display *display;
} WlSource;
/**
* Prepare a WlSource for polling on its descriptor.
*
* base: GSource from a WLSource to prepare.
* timeout: Where GLib expects to receive the maximum timeout for this
* descriptor. For WlSource it will always be set to -1.
**/
static gboolean
wl_glib_source_prepare(GSource *base, gint *timeout)
{
WlSource *source = (WlSource *) base;
*timeout = -1;
/* We have to add/remove the GPollFD if we want to update our
* poll event mask dynamically. Instead, let's just flush all
* write on idle instead, which is what this amounts to. */
while (source->mask & WL_DISPLAY_WRITABLE)
wl_display_iterate(source->display,
WL_DISPLAY_WRITABLE);
return FALSE;
}
/**
* Check a WlSource to see if anything was left pending last time it was
* polled.
*
* base: GSource base for a WlSource.
**/
static gboolean
wl_glib_source_check(GSource *base)
{
WlSource *source = (WlSource *) base;
return source->pfd.revents;
}
/**
* Dispatch events from a WlSource.
*
* base: GSource base for a WlSource.
* callback: Callback glib has assigned for events on this source.
* data: Data glib has associated with `callback`.
**/
static gboolean
wl_glib_source_dispatch(GSource *base,
GSourceFunc callback,
gpointer data)
{
WlSource *source = (WlSource *) base;
wl_display_iterate(source->display,
WL_DISPLAY_READABLE);
return TRUE;
}
/* GLib handlers for a WlSource */
static GSourceFuncs wl_glib_source_funcs = {
wl_glib_source_prepare,
wl_glib_source_check,
wl_glib_source_dispatch,
NULL
};
/* FIXME: Comment needed */
static int
wl_glib_source_update(uint32_t mask, void *data)
{
WlSource *source = data;
source->mask = mask;
return 0;
}
/**
* Create a new WlSource.
*
* display: Display the new WlSource should watch.
**/
GSource *
wl_glib_source_new(struct wl_display *display)
{
WlSource *source;
source = (WlSource *) g_source_new(&wl_glib_source_funcs,
sizeof (WlSource));
source->display = display;
source->pfd.fd = wl_display_get_fd(display,
wl_glib_source_update, source);
source->pfd.events = G_IO_IN | G_IO_ERR;
g_source_add_poll(&source->source, &source->pfd);
return &source->source;
}
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