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tint::CloneContext: Use Hashmap::Generation() 

Instead of tracking its own generation.

Change-Id: Iea9710fd6665cfc13fb72741b8a80c6dde4f64e9
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/100902
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: Dan Sinclair <dsinclair@chromium.org>
Commit-Queue: Ben Clayton <bclayton@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
This commit is contained in:
Ben Clayton 2022-08-31 19:43:48 +00:00 committed by Dawn LUCI CQ
parent 4e0335c5af
commit cd716e6f01
1 changed files with 15 additions and 21 deletions
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36
src/tint/clone_context.h
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@ -541,6 +541,8 @@ class CloneContext {
/// VectorListTransforms is a map of utils::Vector pointer to transforms for that list
struct VectorListTransforms {
using Map = utils::Hashmap<const void*, ListTransforms, 4>;
/// An accessor to the VectorListTransforms map.
/// Index caches the last map lookup, and will only re-search the map if the transform map
/// was modified since the last lookup.
@ -560,44 +562,36 @@ class CloneContext {
private:
friend VectorListTransforms;
Index(const void* list,
VectorListTransforms& vlt,
uint32_t generation,
const ListTransforms* cached)
: list_(list), vlt_(vlt), generation_(generation), cached_(cached) {}
Index(const void* list, Map* map)
: list_(list),
map_(map),
generation_(map->Generation()),
cached_(map_->Find(list)) {}
void Update() {
if (vlt_.generation_ != generation_) {
cached_ = vlt_.map_.Find(list_);
generation_ = vlt_.generation_;
if (map_->Generation() != generation_) {
cached_ = map_->Find(list_);
generation_ = map_->Generation();
}
}
const void* list_;
VectorListTransforms& vlt_;
uint32_t generation_;
Map* map_;
uint64_t generation_;
const ListTransforms* cached_;
};
/// Edit returns a reference to the ListTransforms for the given vector pointer and
/// increments #list_transform_generation_ signalling that the list transforms have been
/// modified.
inline ListTransforms& Edit(const void* list) {
generation_++;
return map_.GetOrZero(list);
}
inline ListTransforms& Edit(const void* list) { return map_.GetOrZero(list); }
/// @returns an Index to the transforms for the given list.
inline Index Find(const void* list) {
return Index{list, *this, generation_, map_.Find(list)};
}
inline Index Find(const void* list) { return Index{list, &map_}; }
private:
/// The map of vector pointer to ListTransforms
utils::Hashmap<const void*, ListTransforms, 4> map_;
/// A counter that's incremented each time list transforms are modified.
uint32_t generation_ = 0;
Map map_;
};
/// A map of object in #src to functions that create their replacement in #dst