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#include <stdint.h>
#include <stdlib.h>
#include <wayland-client.h>
#include <X11/Xlib.h>
#include "private.h"
union entry {
uintptr_t next;
void *data;
};
XID
csx_display_add_resource(struct csx_display *display, void *p)
{
union entry *e, *map;
int size;
if (display->free_resource > 0) {
e = display->resource_map + display->free_resource;
display->free_resource = e->next;
} else {
if (display->resource_count == display->resource_size) {
if (display->resource_size == 0)
size = 256;
else
size = display->resource_size * 2;
map = realloc(display->resource_map,
size * sizeof *e);
if (map == NULL)
return None;
display->resource_map = map;
display->resource_size = size;
}
e = display->resource_map + display->resource_count;
display->resource_count++;
}
e->data = p;
return e - display->resource_map;
}
void
csx_display_remove_resource(struct csx_display *display, XID id)
{
union entry *e;
e = display->resource_map + id;
e->next = display->free_resource;
display->free_resource = id;
}
void *
csx_display_lookup_resource(struct csx_display *display, XID id)
{
/* FIXME: verify that we're looking up a valid resource:
* inside valid range and not in free-list. */
if (id >= display->resource_size)
return NULL;
return display->resource_map[id].data;
}
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