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Do less copying in image_cache_task

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This commit is contained in:
Brian Anderson 2012-10-12 15:20:17 -07:00
parent 127a6ba191
commit 561879848c
1 changed files with 25 additions and 20 deletions
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45
src/servo/resource/image_cache_task.rs
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@ -1,3 +1,4 @@
use core::util::replace;
use image::base::{Image, load_from_memory, test_image_bin};
use std::net::url::Url;
use util::url::{make_url, UrlMap, url_map};
@ -15,6 +16,7 @@ pub enum Msg {
/// before Decode
pub Prefetch(Url),
// FIXME: We can probably get rid of this Cell now
/// Used be the prefetch tasks to post back image binaries
priv StorePrefetchedImageData(Url, Result<Cell<~[u8]>, ()>),
@ -104,13 +106,13 @@ fn SyncImageCacheTask(resource_task: ResourceTask) -> ImageCacheTask {
loop {
let msg = from_client.recv();
match msg {
GetImage(url, response) => inner_cache.send(WaitForImage(copy url, response)),
Exit(response) => {
match move msg {
GetImage(move url, move response) => inner_cache.send(WaitForImage(url, response)),
Exit(move response) => {
inner_cache.send(Exit(response));
break;
}
_ => inner_cache.send(msg)
move msg => inner_cache.send(msg)
}
}
}
@ -158,23 +160,24 @@ impl ImageCache {
#debug("image_cache_task: received: %?", msg);
// FIXME: Need to move out the urls
match msg {
Prefetch(url) => self.prefetch(copy url),
StorePrefetchedImageData(url, data) => self.store_prefetched_image_data(copy url, &data),
Decode(url) => self.decode(copy url),
StoreImage(url, image) => self.store_image(copy url, &image),
GetImage(url, response) => self.get_image(copy url, response),
WaitForImage(url, response) => self.wait_for_image(copy url, response),
OnMsg(handler) => msg_handlers += [copy handler],
Exit(response) => {
match move msg {
Prefetch(move url) => self.prefetch(url),
StorePrefetchedImageData(move url, move data) => self.store_prefetched_image_data(url, data),
Decode(move url) => self.decode(url),
StoreImage(move url, move image) => self.store_image(url, image),
GetImage(move url, move response) => self.get_image(url, response),
WaitForImage(move url, move response) => self.wait_for_image(url, response),
OnMsg(move handler) => msg_handlers += [copy handler],
Exit(move response) => {
assert self.need_exit.is_none();
self.need_exit = Some(response);
}
}
match copy self.need_exit {
Some(response) => {
let need_exit = replace(&mut self.need_exit, None);
match move need_exit {
Some(move response) => {
// Wait until we have no outstanding requests and subtasks
// before exiting
let mut can_exit = true;
@ -193,6 +196,8 @@ impl ImageCache {
if can_exit {
response.send(());
break;
} else {
self.need_exit = Some(move response);
}
}
None => ()
@ -246,10 +251,10 @@ impl ImageCache {
}
}
priv fn store_prefetched_image_data(url: Url, data: &Result<Cell<~[u8]>, ()>) {
priv fn store_prefetched_image_data(url: Url, data: Result<Cell<~[u8]>, ()>) {
match self.get_state(copy url) {
Prefetching(next_step) => {
match *data {
match data {
Ok(data_cell) => {
let data = data_cell.take();
self.set_state(copy url, Prefetched(@Cell(data)));
@ -321,11 +326,11 @@ impl ImageCache {
}
}
priv fn store_image(url: Url, image: &Option<ARC<~Image>>) {
priv fn store_image(url: Url, image: Option<ARC<~Image>>) {
match self.get_state(copy url) {
Decoding => {
match *image {
match image {
Some(image) => {
self.set_state(copy url, Decoded(@clone_arc(&image)));
self.purge_waiters(url, || ImageReady(clone_arc(&image)) );