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fix for 21329, restricting the number of items in cache only for windows.r=pnunn

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neeti%netscape.com 2000-04-17 00:28:56 +00:00
parent 3c48f3bef3
commit 3b00311664
1 changed files with 17 additions and 0 deletions
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17
modules/libimg/src/ilclient.cpp
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@ -776,12 +776,29 @@ void
il_reduce_image_cache_size_to(PRUint32 new_size) il_reduce_image_cache_size_to(PRUint32 new_size)
{ {
int32 last_size = 0; int32 last_size = 0;
#ifdef XP_PC
/*
We are limiting he number of items(containers) in the
imagelib cache to 192 for windows only.We need to limit
the number of containers in the image cache for win95/98,
because each container contains an nsIImage instance, and
each nsIImage instance on window (nsImageWin) holds onto
a HBITMAP which is a GDI resource. The number of GDI resources
is limited on windows. Hence by limiting the number
of items in the cache, we ensure that we do not run
out of resources. Note that even if we limit the number of
items in the cache to 192, the actual number of items may be more
than this, depending on the actual number of nsIImage instances in use.
Currently, we are making this restriction only on platforms where
there is a known problem.
*/
int32 last_num_items = 0; int32 last_num_items = 0;
while ((il_cache.items > (int32)max_cache_items) && (il_cache.items != last_num_items)) { while ((il_cache.items > (int32)max_cache_items) && (il_cache.items != last_num_items)) {
last_num_items = il_cache.items; last_num_items = il_cache.items;
IL_ShrinkCache(); IL_ShrinkCache();
} }
#endif
while ((il_cache.bytes > (int32)new_size) && (il_cache.bytes != last_size)) { while ((il_cache.bytes > (int32)new_size) && (il_cache.bytes != last_size)) {
last_size = il_cache.bytes; last_size = il_cache.bytes;