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Update comments in some X code

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* src/xterm.c (x_parse_color): Update comment.
(syms_of_xterm): Add new debugging option too.
This commit is contained in:
Po Lu 2022-05-27 14:32:09 +08:00
parent 7da754015f
commit edd11a2c6e
1 changed files with 11 additions and 6 deletions
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17
src/xterm.c
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@ -7264,10 +7264,8 @@ x_hash_string_ignore_case (const char *string)
/* On frame F, translate the color name to RGB values. Use cached
information, if possible.
Note that there is currently no way to clean old entries out of the
cache. However, it is limited to names in the server's database,
and names we've actually looked up; list-colors-display is probably
the most color-intensive case we're likely to hit. */
If too many entries are placed in the cache, the least recently
used entries are removed. */
Status
x_parse_color (struct frame *f, const char *color_name,
@ -7351,13 +7349,15 @@ x_parse_color (struct frame *f, const char *color_name,
dpyinfo->color_names[idx] = cache_entry;
/* Don't let the color cache become too big. */
if (dpyinfo->color_names_length[idx] > 128)
if (dpyinfo->color_names_length[idx] > (x_color_cache_bucket_size > 0
? x_color_cache_bucket_size : 128))
{
i = 0;
for (last = dpyinfo->color_names[idx]; last; last = last->next)
{
if (++i == 128)
if (++i == (x_color_cache_bucket_size > 0
? x_color_cache_bucket_size : 128))
{
next = last->next;
last->next = NULL;
@ -25941,4 +25941,9 @@ where the drop happened, ACTION is the action that was passed to
`x-begin-drag', FRAME is the frame which initiated the drag-and-drop
operation, and TIME is the X server time when the drop happened. */);
Vx_dnd_unsupported_drop_function = Qnil;
DEFVAR_INT ("x-color-cache-bucket-size", x_color_cache_bucket_size,
doc: /* Most buckets allowed per display in the internal color cache.
Values less than 1 mean 128. This option is for debugging only. */);
x_color_cache_bucket_size = 128;
}