Auto merge of #11221 - izgzhen:blob-file-backend, r=Manishearth

Add file backend support for Blob and related

- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy --faster` does not report any errors
- [x] These changes fix #10851, related to #11131
- [x] These changes do not require tests because the implementation is partial and can't work alone

1. Add new backend to `Blob` and a `BlobImpl` struct to abstract multiple backends
2. Rewrite most interfaces of `Blob` to accommodate the change
3. Change the `read` behaviour of `FileReader`, considering the case when blob is file-backed and not cached

The design is still immature, welcome comments!

- [x] I used `DOMRefCell` to cache the bytes in `BlobImpl`, is it sound?
- [x] The interfaces (like `BlobImpl::get_bytes`) handle requests in a default-to-empty way when the inner `DataSlice` is not cached. It might be possible to handle this condition better.

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This commit is contained in:
bors-servo 2016-06-01 05:09:21 -05:00
commit 3d7b17681d
18 changed files with 253 additions and 152 deletions

47
ports/cef/Cargo.lock generated
View file

@ -168,7 +168,7 @@ dependencies = [
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@ -686,7 +686,7 @@ dependencies = [
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@ -964,11 +964,10 @@ dependencies = [
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@ -1058,7 +1057,7 @@ dependencies = [
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@ -1090,7 +1089,7 @@ name = "layout_traits"
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@ -1256,7 +1255,7 @@ dependencies = [
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@ -1280,7 +1279,7 @@ dependencies = [
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@ -1324,7 +1323,7 @@ dependencies = [
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@ -1591,7 +1590,7 @@ name = "profile"
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@ -1609,7 +1608,7 @@ dependencies = [
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@ -1789,7 +1788,7 @@ dependencies = [
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@ -1875,7 +1874,7 @@ dependencies = [
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@ -2252,7 +2251,7 @@ dependencies = [
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@ -2362,7 +2361,7 @@ dependencies = [
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@ -2388,7 +2387,7 @@ dependencies = [
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View file

@ -255,11 +255,10 @@ dependencies = [
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