/**
* cairo_font_face_destroy:
* @font_face: a #cairo_font_face_t
*
* Decreases the reference count on @font_face by one. If the result
* is zero, then @font_face and all associated resources are freed.
* See cairo_font_face_reference().
**/
void
cairo_font_face_destroy (cairo_font_face_t *font_face)
{
if (font_face == NULL || font_face->ref_count == CAIRO_REF_COUNT_INVALID)
return;
CAIRO_MUTEX_LOCK (_cairo_font_face_mutex);
assert (font_face->ref_count > 0);
if (--(font_face->ref_count) > 0) {
CAIRO_MUTEX_UNLOCK (_cairo_font_face_mutex);
return;
}
CAIRO_MUTEX_UNLOCK (_cairo_font_face_mutex);
font_face->backend->destroy (font_face);
/* We allow resurrection to deal with some memory management for the
* FreeType backend where cairo_ft_font_face_t and cairo_ft_unscaled_font_t
* need to effectively mutually reference each other
*/
if (font_face->ref_count > 0)
return;
_cairo_user_data_array_fini (&font_face->user_data);
free (font_face);
}
cairo_status_t
_cairo_xlib_screen_get_visual_info (cairo_xlib_screen_info_t *info,
Visual *visual,
cairo_xlib_visual_info_t **out)
{
Display *dpy = info->display->display;
cairo_xlib_visual_info_t **visuals, *ret = NULL;
cairo_status_t status;
int i, n_visuals;
CAIRO_MUTEX_LOCK (info->mutex);
visuals = _cairo_array_index (&info->visuals, 0);
n_visuals = _cairo_array_num_elements (&info->visuals);
for (i = 0; i < n_visuals; i++) {
if (visuals[i]->visualid == visual->visualid) {
ret = visuals[i];
break;
}
}
CAIRO_MUTEX_UNLOCK (info->mutex);
if (ret != NULL) {
*out = ret;
return CAIRO_STATUS_SUCCESS;
}
status = _cairo_xlib_visual_info_create (dpy,
XScreenNumberOfScreen (info->screen),
visual->visualid,
&ret);
if (status)
return status;
CAIRO_MUTEX_LOCK (info->mutex);
if (n_visuals != _cairo_array_num_elements (&info->visuals)) {
/* check that another thread has not added our visual */
int new_visuals = _cairo_array_num_elements (&info->visuals);
visuals = _cairo_array_index (&info->visuals, 0);
for (i = n_visuals; i < new_visuals; i++) {
if (visuals[i]->visualid == visual->visualid) {
_cairo_xlib_visual_info_destroy (dpy, ret);
ret = visuals[i];
break;
}
}
if (i == new_visuals)
status = _cairo_array_append (&info->visuals, &ret);
} else
status = _cairo_array_append (&info->visuals, &ret);
CAIRO_MUTEX_UNLOCK (info->mutex);
if (status) {
_cairo_xlib_visual_info_destroy (dpy, ret);
return status;
}
*out = ret;
return CAIRO_STATUS_SUCCESS;
}
void
_cairo_xlib_display_notify (cairo_xlib_display_t *display)
{
cairo_xlib_job_t *jobs, *job, *freelist;
Display *dpy = display->display;
CAIRO_MUTEX_LOCK (display->mutex);
jobs = display->workqueue;
while (jobs != NULL) {
display->workqueue = NULL;
CAIRO_MUTEX_UNLOCK (display->mutex);
/* reverse the list to obtain FIFO order */
job = NULL;
do {
cairo_xlib_job_t *next = jobs->next;
jobs->next = job;
job = jobs;
jobs = next;
} while (jobs != NULL);
freelist = jobs = job;
do {
job = jobs;
jobs = job->next;
switch (job->type){
case WORK:
job->func.work.notify (dpy, job->func.work.data);
if (job->func.work.destroy != NULL)
job->func.work.destroy (job->func.work.data);
break;
case RESOURCE:
job->func.resource.notify (dpy, job->func.resource.xid);
break;
}
} while (jobs != NULL);
CAIRO_MUTEX_LOCK (display->mutex);
do {
job = freelist;
freelist = job->next;
_cairo_freelist_free (&display->wq_freelist, job);
} while (freelist != NULL);
jobs = display->workqueue;
}
CAIRO_MUTEX_UNLOCK (display->mutex);
}
static int
_cairo_xlib_close_display (Display *dpy, XExtCodes *codes)
{
cairo_xlib_display_t *display, **prev, *next;
cairo_xlib_error_func_t old_handler;
CAIRO_MUTEX_LOCK (_cairo_xlib_display_mutex);
for (display = _cairo_xlib_display_list; display; display = display->next)
if (display->display == dpy)
break;
CAIRO_MUTEX_UNLOCK (_cairo_xlib_display_mutex);
if (display == NULL)
return 0;
/* protect the notifies from triggering XErrors */
XSync (dpy, False);
old_handler = XSetErrorHandler (_noop_error_handler);
_cairo_xlib_display_notify (display);
_cairo_xlib_call_close_display_hooks (display);
_cairo_xlib_display_discard_screens (display);
/* catch any that arrived before marking the display as closed */
_cairo_xlib_display_notify (display);
XSync (dpy, False);
XSetErrorHandler (old_handler);
/*
* Unhook from the global list
*/
CAIRO_MUTEX_LOCK (_cairo_xlib_display_mutex);
prev = &_cairo_xlib_display_list;
for (display = _cairo_xlib_display_list; display; display = next) {
next = display->next;
if (display->display == dpy) {
*prev = next;
break;
} else
prev = &display->next;
}
CAIRO_MUTEX_UNLOCK (_cairo_xlib_display_mutex);
assert (display != NULL);
_cairo_xlib_display_destroy (display);
/* Return value in accordance with requirements of
* XESetCloseDisplay */
return 0;
}
void
_cairo_scaled_font_map_destroy (void)
{
int i;
cairo_scaled_font_map_t *font_map = cairo_scaled_font_map;
cairo_scaled_font_t *scaled_font;
if (font_map == NULL)
return;
CAIRO_MUTEX_UNLOCK (cairo_scaled_font_map_mutex);
for (i = 0; i < font_map->num_holdovers; i++) {
scaled_font = font_map->holdovers[i];
/* We should only get here through the reset_static_data path
* and there had better not be any active references at that
* point. */
assert (scaled_font->ref_count == 0);
_cairo_hash_table_remove (font_map->hash_table,
&scaled_font->hash_entry);
_cairo_scaled_font_fini (scaled_font);
free (scaled_font);
}
_cairo_hash_table_destroy (font_map->hash_table);
free (cairo_scaled_font_map);
cairo_scaled_font_map = NULL;
}
static cairo_int_status_t
_cairo_paginated_surface_show_glyphs (void *abstract_surface,
cairo_operator_t op,
cairo_pattern_t *source,
cairo_glyph_t *glyphs,
int num_glyphs,
cairo_scaled_font_t *scaled_font)
{
cairo_paginated_surface_t *surface = abstract_surface;
cairo_int_status_t status;
/* Optimize away erasing of nothing. */
if (surface->page_is_blank && op == CAIRO_OPERATOR_CLEAR)
return CAIRO_STATUS_SUCCESS;
surface->page_is_blank = FALSE;
/* Since this is a "wrapping" surface, we're calling back into
* _cairo_surface_show_glyphs from within a call to the same.
* Since _cairo_surface_show_glyphs acquires a mutex, we release
* and re-acquire the mutex around this nested call.
*
* Yes, this is ugly, but we consider it pragmatic as compared to
* adding locking code to all 18 surface-backend-specific
* show_glyphs functions, (which would get less testing and likely
* lead to bugs).
*/
CAIRO_MUTEX_UNLOCK (scaled_font->mutex);
status = _cairo_surface_show_glyphs (surface->meta, op, source,
glyphs, num_glyphs,
scaled_font);
CAIRO_MUTEX_LOCK (scaled_font->mutex);
return status;
}
cairo_status_t
_cairo_xlib_display_queue_work (cairo_xlib_display_t *display,
cairo_xlib_notify_func notify,
void *data,
void (*destroy) (void *))
{
cairo_xlib_job_t *job;
cairo_status_t status = CAIRO_STATUS_NO_MEMORY;
CAIRO_MUTEX_LOCK (display->mutex);
if (display->closed == FALSE) {
job = _cairo_freelist_alloc (&display->wq_freelist);
if (job != NULL) {
job->type = WORK;
job->func.work.data = data;
job->func.work.notify = notify;
job->func.work.destroy = destroy;
job->next = display->workqueue;
display->workqueue = job;
status = CAIRO_STATUS_SUCCESS;
}
}
CAIRO_MUTEX_UNLOCK (display->mutex);
return status;
}
cairo_status_t
_cairo_xlib_display_queue_resource (cairo_xlib_display_t *display,
cairo_xlib_notify_resource_func notify,
XID xid)
{
cairo_xlib_job_t *job;
cairo_status_t status = CAIRO_STATUS_NO_MEMORY;
CAIRO_MUTEX_LOCK (display->mutex);
if (display->closed == FALSE) {
job = _cairo_freelist_alloc (&display->wq_freelist);
if (job != NULL) {
job->type = RESOURCE;
job->func.resource.xid = xid;
job->func.resource.notify = notify;
job->next = display->workqueue;
display->workqueue = job;
status = CAIRO_STATUS_SUCCESS;
}
}
CAIRO_MUTEX_UNLOCK (display->mutex);
return status;
}
void
_cairo_xlib_remove_close_display_hooks (Display *dpy, const void *key)
{
cairo_xlib_display_t *display;
cairo_xlib_hook_t *hook, *next, **prev;
display = _cairo_xlib_display_get (dpy);
if (display == NULL)
return;
CAIRO_MUTEX_LOCK (display->mutex);
prev = &display->close_display_hooks;
for (hook = display->close_display_hooks; hook != NULL; hook = next) {
next = hook->next;
if (hook->key == key) {
*prev = hook->next;
_cairo_freelist_free (&display->hook_freelist, hook);
} else
prev = &hook->next;
}
*prev = NULL;
CAIRO_MUTEX_UNLOCK (display->mutex);
_cairo_xlib_display_destroy (display);
}
cairo_bool_t
_cairo_xlib_add_close_display_hook (Display *dpy, void (*func) (Display *, void *), void *data, const void *key)
{
cairo_xlib_display_t *display;
cairo_xlib_hook_t *hook;
cairo_bool_t ret = FALSE;
display = _cairo_xlib_display_get (dpy);
if (display == NULL)
return FALSE;
CAIRO_MUTEX_LOCK (display->mutex);
if (display->closed == FALSE) {
hook = _cairo_freelist_alloc (&display->hook_freelist);
if (hook != NULL) {
hook->func = func;
hook->data = data;
hook->key = key;
hook->next = display->close_display_hooks;
display->close_display_hooks = hook;
ret = TRUE;
}
}
CAIRO_MUTEX_UNLOCK (display->mutex);
_cairo_xlib_display_destroy (display);
return ret;
}
void
_cairo_xlib_screen_info_destroy (cairo_xlib_screen_info_t *info)
{
cairo_xlib_screen_info_t **prev;
cairo_xlib_screen_info_t *list;
assert (CAIRO_REFERENCE_COUNT_HAS_REFERENCE (&info->ref_count));
if (! _cairo_reference_count_dec_and_test (&info->ref_count))
return;
CAIRO_MUTEX_LOCK (info->display->mutex);
for (prev = &info->display->screens; (list = *prev); prev = &list->next) {
if (list == info) {
*prev = info->next;
break;
}
}
CAIRO_MUTEX_UNLOCK (info->display->mutex);
_cairo_xlib_screen_info_close_display (info);
_cairo_xlib_display_destroy (info->display);
_cairo_array_fini (&info->visuals);
CAIRO_MUTEX_FINI (info->mutex);
free (info);
}
cairo_status_t
_cairo_xlib_screen_put_gc (cairo_xlib_screen_info_t *info, int depth, GC gc, cairo_bool_t reset_clip)
{
cairo_status_t status = CAIRO_STATUS_SUCCESS;
GC oldgc;
depth = depth_to_index (depth);
CAIRO_MUTEX_LOCK (info->mutex);
oldgc = info->gc[depth];
info->gc[depth] = gc;
if (reset_clip)
info->gc_needs_clip_reset |= 1 << depth;
else
info->gc_needs_clip_reset &= ~(1 << depth);
CAIRO_MUTEX_UNLOCK (info->mutex);
if (oldgc != NULL) {
status = _cairo_xlib_display_queue_work (info->display,
(cairo_xlib_notify_func) XFreeGC,
oldgc,
NULL);
}
return status;
}
void
_cairo_atomic_int_inc (int *x)
{
CAIRO_MUTEX_LOCK (_cairo_atomic_mutex);
*x += 1;
CAIRO_MUTEX_UNLOCK (_cairo_atomic_mutex);
}
static cairo_scaled_font_map_t *
_cairo_scaled_font_map_lock (void)
{
CAIRO_MUTEX_LOCK (cairo_scaled_font_map_mutex);
if (cairo_scaled_font_map == NULL) {
cairo_scaled_font_map = malloc (sizeof (cairo_scaled_font_map_t));
if (cairo_scaled_font_map == NULL)
goto CLEANUP_MUTEX_LOCK;
cairo_scaled_font_map->hash_table =
_cairo_hash_table_create (_cairo_scaled_font_keys_equal);
if (cairo_scaled_font_map->hash_table == NULL)
goto CLEANUP_SCALED_FONT_MAP;
cairo_scaled_font_map->num_holdovers = 0;
}
return cairo_scaled_font_map;
CLEANUP_SCALED_FONT_MAP:
free (cairo_scaled_font_map);
CLEANUP_MUTEX_LOCK:
CAIRO_MUTEX_UNLOCK (cairo_scaled_font_map_mutex);
return NULL;
}
void
_cairo_atomic_int_set (int *x, int value)
{
CAIRO_MUTEX_LOCK (_cairo_atomic_mutex);
*x = value;
CAIRO_MUTEX_UNLOCK (_cairo_atomic_mutex);
}
void
_cairo_unlock_global_image_glyph_cache (void)
{
if (_global_image_glyph_cache) {
_cairo_cache_shrink_to (_global_image_glyph_cache,
CAIRO_IMAGE_GLYPH_CACHE_MEMORY_DEFAULT);
}
CAIRO_MUTEX_UNLOCK (_global_image_glyph_cache_mutex);
}
void
_cairo_font_reset_static_data (void)
{
_cairo_scaled_font_map_destroy ();
CAIRO_MUTEX_LOCK (cairo_toy_font_face_hash_table_mutex);
_cairo_hash_table_destroy (cairo_toy_font_face_hash_table);
cairo_toy_font_face_hash_table = NULL;
CAIRO_MUTEX_UNLOCK (cairo_toy_font_face_hash_table_mutex);
}
int
_cairo_atomic_int_get (int *x)
{
int ret;
CAIRO_MUTEX_LOCK (_cairo_atomic_mutex);
ret = *x;
CAIRO_MUTEX_UNLOCK (_cairo_atomic_mutex);
return ret;
}
cairo_bool_t
_cairo_atomic_int_dec_and_test (int *x)
{
cairo_bool_t ret;
CAIRO_MUTEX_LOCK (_cairo_atomic_mutex);
ret = --*x == 0;
CAIRO_MUTEX_UNLOCK (_cairo_atomic_mutex);
return ret;
}
cairo_atomic_intptr_t
_cairo_atomic_int_get (cairo_atomic_intptr_t *x)
{
cairo_atomic_intptr_t ret;
CAIRO_MUTEX_LOCK (_cairo_atomic_mutex);
ret = *x;
CAIRO_MUTEX_UNLOCK (_cairo_atomic_mutex);
return ret;
}
void
_cairo_toy_font_face_reset_static_data (void)
{
/* We manually acquire the lock rather than calling
* cairo_toy_font_face_hash_table_lock simply to avoid
* creating the table only to destroy it again. */
CAIRO_MUTEX_LOCK (_cairo_toy_font_face_mutex);
_cairo_hash_table_destroy (cairo_toy_font_face_hash_table);
cairo_toy_font_face_hash_table = NULL;
CAIRO_MUTEX_UNLOCK (_cairo_toy_font_face_mutex);
}
int
_cairo_atomic_int_cmpxchg (int *x, int oldv, int newv)
{
int ret;
CAIRO_MUTEX_LOCK (_cairo_atomic_mutex);
ret = *x;
if (ret == oldv)
*x = newv;
CAIRO_MUTEX_UNLOCK (_cairo_atomic_mutex);
return ret;
}
void *
_cairo_atomic_ptr_cmpxchg_return_old_impl (void **x, void *oldv, void *newv)
{
void *ret;
CAIRO_MUTEX_LOCK (_cairo_atomic_mutex);
ret = *x;
if (ret == oldv)
*x = newv;
CAIRO_MUTEX_UNLOCK (_cairo_atomic_mutex);
return ret;
}
static void
_cairo_xlib_call_close_display_hooks (cairo_xlib_display_t *display)
{
cairo_xlib_screen_info_t *screen;
cairo_xlib_hook_t *hooks, *list;
/* call all registered shutdown routines */
CAIRO_MUTEX_LOCK (display->mutex);
for (screen = display->screens; screen != NULL; screen = screen->next)
_cairo_xlib_screen_info_close_display (screen);
hooks = display->close_display_hooks;
while (hooks != NULL) {
display->close_display_hooks = NULL;
CAIRO_MUTEX_UNLOCK (display->mutex);
list = hooks;
do {
cairo_xlib_hook_t *hook = list;
list = hook->next;
hook->func (display->display, hook->data);
} while (list != NULL);
CAIRO_MUTEX_LOCK (display->mutex);
do {
cairo_xlib_hook_t *hook = hooks;
hooks = hook->next;
_cairo_freelist_free (&display->hook_freelist, hook);
} while (hooks != NULL);
hooks = display->close_display_hooks;
}
display->closed = TRUE;
CAIRO_MUTEX_UNLOCK (display->mutex);
}
cairo_atomic_intptr_t
_cairo_atomic_int_cmpxchg_return_old_impl (cairo_atomic_intptr_t *x, cairo_atomic_intptr_t oldv, cairo_atomic_intptr_t newv)
{
cairo_atomic_intptr_t ret;
CAIRO_MUTEX_LOCK (_cairo_atomic_mutex);
ret = *x;
if (ret == oldv)
*x = newv;
CAIRO_MUTEX_UNLOCK (_cairo_atomic_mutex);
return ret;
}
void
_cairo_drm_device_fini (cairo_drm_device_t *device)
{
CAIRO_MUTEX_LOCK (_cairo_drm_device_mutex);
if (device->prev != NULL)
device->prev->next = device->next;
else
_cairo_drm_known_devices = device->next;
if (device->next != NULL)
device->next->prev = device->prev;
CAIRO_MUTEX_UNLOCK (_cairo_drm_device_mutex);
if (device->fd != -1)
close (device->fd);
}
void
_cairo_font_reset_static_data (void)
{
_cairo_scaled_font_map_destroy ();
_cairo_lock_global_image_glyph_cache();
_cairo_cache_destroy (_global_image_glyph_cache);
_global_image_glyph_cache = NULL;
_cairo_unlock_global_image_glyph_cache();
CAIRO_MUTEX_LOCK (cairo_toy_font_face_hash_table_mutex);
_cairo_hash_table_destroy (cairo_toy_font_face_hash_table);
cairo_toy_font_face_hash_table = NULL;
CAIRO_MUTEX_UNLOCK (cairo_toy_font_face_hash_table_mutex);
}
static void
_cairo_surface_snapshot_copy_on_write (cairo_surface_t *surface)
{
cairo_surface_snapshot_t *snapshot = (cairo_surface_snapshot_t *) surface;
cairo_image_surface_t *image;
cairo_surface_t *clone;
void *extra;
cairo_status_t status;
TRACE ((stderr, "%s: target=%d\n",
__FUNCTION__, snapshot->target->unique_id));
/* We need to make an image copy of the original surface since the
* snapshot may exceed the lifetime of the original device, i.e.
* when we later need to use the snapshot the data may have already
* been lost.
*/
CAIRO_MUTEX_LOCK (snapshot->mutex);
if (snapshot->target->backend->snapshot != NULL) {
clone = snapshot->target->backend->snapshot (snapshot->target);
if (clone != NULL) {
assert (clone->status || ! _cairo_surface_is_snapshot (clone));
goto done;
}
}
/* XXX copy to a similar surface, leave acquisition till later?
* We should probably leave such decisions to the backend in case we
* rely upon devices/connections like Xlib.
*/
status = _cairo_surface_acquire_source_image (snapshot->target, &image, &extra);
if (unlikely (status)) {
snapshot->target = _cairo_surface_create_in_error (status);
status = _cairo_surface_set_error (surface, status);
goto unlock;
}
clone = image->base.backend->snapshot (&image->base);
_cairo_surface_release_source_image (snapshot->target, image, extra);
done:
status = _cairo_surface_set_error (surface, clone->status);
snapshot->target = snapshot->clone = clone;
snapshot->base.type = clone->type;
unlock:
CAIRO_MUTEX_UNLOCK (snapshot->mutex);
}
static void
_cairo_xlib_display_discard_screens (cairo_xlib_display_t *display)
{
cairo_xlib_screen_info_t *screens;
CAIRO_MUTEX_LOCK (display->mutex);
screens = display->screens;
display->screens = NULL;
CAIRO_MUTEX_UNLOCK (display->mutex);
while (screens != NULL) {
cairo_xlib_screen_info_t *screen = screens;
screens = screen->next;
_cairo_xlib_screen_info_destroy (screen);
}
}
/**
* cairo_font_face_reference:
* @font_face: a #cairo_font_face_t, (may be %NULL in which case this
* function does nothing).
*
* Increases the reference count on @font_face by one. This prevents
* @font_face from being destroyed until a matching call to
* cairo_font_face_destroy() is made.
*
* The number of references to a #cairo_font_face_t can be get using
* cairo_font_face_get_reference_count().
*
* Return value: the referenced #cairo_font_face_t.
**/
cairo_font_face_t *
cairo_font_face_reference (cairo_font_face_t *font_face)
{
if (font_face == NULL || font_face->ref_count == CAIRO_REF_COUNT_INVALID)
return font_face;
CAIRO_MUTEX_LOCK (_cairo_font_face_mutex);
/* We would normally assert (font_face->ref_count >0) here but we
* can't get away with that due to the zombie case as documented
* in _cairo_ft_font_face_destroy. */
font_face->ref_count++;
CAIRO_MUTEX_UNLOCK (_cairo_font_face_mutex);
return font_face;
}
