-
Notifications
You must be signed in to change notification settings - Fork 18
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Merge pull request #681 from lukemartinlogan/memory_only
Hermes memory only first implementation
- Loading branch information
Showing
12 changed files
with
447 additions
and
374 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,123 @@ | ||
| // | ||
| // Created by lukemartinlogan on 2/20/24. | ||
| // | ||
|
|
||
| #ifndef HERMES_HRUN_INCLUDE_HRUN_HRUN_MAP_H_ | ||
| #define HERMES_HRUN_INCLUDE_HRUN_HRUN_MAP_H_ | ||
|
|
||
| #include "hrun_types.h" | ||
|
|
||
| namespace hrun { | ||
|
|
||
| template<typename Key, typename T> | ||
| class LockFreeMap; | ||
|
|
||
| /** | ||
| * Iterator for lock-free map | ||
| * */ | ||
| template<typename Key, typename T> | ||
| struct LockFreeMapIterator { | ||
| public: | ||
| using Pair = hipc::pair<Key, T>; | ||
| size_t x_, y_; | ||
| Pair *val_; | ||
|
|
||
| bool operator==(const LockFreeMapIterator &other) const { | ||
| return x_ == other.x_ && y_ == other.y_; | ||
| } | ||
|
|
||
| bool operator!=(const LockFreeMapIterator &other) const { | ||
| return x_ != other.x_ || y_ != other.y_; | ||
| } | ||
| }; | ||
|
|
||
| /** | ||
| * A lock-free unordered map implementation | ||
| * */ | ||
| template<typename Key, typename T> | ||
| class LockFreeMap { | ||
| public: | ||
| using Pair = hipc::pair<Key, T>; | ||
| using Bucket = hipc::mpsc_queue<Pair>; | ||
| hipc::mptr<hipc::vector<Bucket>> map_; | ||
| int num_lanes_; | ||
| size_t bkts_per_lane_; | ||
|
|
||
| void Init(hipc::Allocator *alloc, int num_lanes, size_t bkts_per_lane, | ||
| size_t collisions) { | ||
| map_ = hipc::make_mptr<hipc::vector<Bucket>>( | ||
| alloc, num_lanes * bkts_per_lane, collisions); | ||
| } | ||
|
|
||
| void Connect(const hipc::Pointer &p) { | ||
| map_ = hipc::mptr<hipc::vector<Bucket>>( | ||
| p); | ||
| } | ||
|
|
||
| size_t FirstBucket(int lane_id) const { | ||
| return lane_id * bkts_per_lane_; | ||
| } | ||
|
|
||
| size_t LastBucket(int lane_id) const { | ||
| return FirstBucket(lane_id) + bkts_per_lane_; | ||
| } | ||
|
|
||
| Bucket& GetBucket(size_t bkt_id) { | ||
| return (*map_)[bkt_id]; | ||
| } | ||
|
|
||
| hipc::Pointer GetShmPointer() { | ||
| return map_->template GetShmPointer<hipc::Pointer>(); | ||
| } | ||
|
|
||
| void emplace(const Key &key, const T &val) { | ||
| size_t hash = std::hash<Key>{}(key); | ||
| size_t x = hash % map_->size(); | ||
| Bucket &bkt = (*map_)[x]; | ||
| bkt.emplace(key, val); | ||
| } | ||
|
|
||
| LockFreeMapIterator<Key, T> find(const Key &key) { | ||
| LockFreeMapIterator<Key, T> it; | ||
| size_t hash = std::hash<Key>{}(key); | ||
| it.x_ = hash % map_->size(); | ||
| Bucket &bkt = (*map_)[it.x_]; | ||
| size_t head = bkt.head_; | ||
| size_t tail = bkt.tail_; | ||
| size_t bkt_size = 0; | ||
| if (head <= tail) { | ||
| bkt_size = tail - head; | ||
| } | ||
| for (size_t i = 0; i < bkt_size; ++i) { | ||
| Pair *val; | ||
| if (bkt.peek(val, i).IsNull()) { | ||
| continue; | ||
| } | ||
| it.y_ = i; | ||
| it.val_ = val; | ||
| return it; | ||
| } | ||
| it.x_ = map_->size(); | ||
| it.y_ = -1; | ||
| return it; | ||
| } | ||
|
|
||
| T& operator[](const Key &key) { | ||
| LockFreeMapIterator<Key, T> it = find(key); | ||
| if (it.x_ == map_->size()) { | ||
| throw std::runtime_error("Key not found"); | ||
| } | ||
| return *it.val_->second_; | ||
| } | ||
|
|
||
| LockFreeMapIterator<Key, T> end() const { | ||
| LockFreeMapIterator<Key, T> it; | ||
| it.x_ = map_->size(); | ||
| it.y_ = -1; | ||
| return it; | ||
| } | ||
| }; | ||
|
|
||
| } // namespace hshm | ||
|
|
||
| #endif //HERMES_HRUN_INCLUDE_HRUN_HRUN_MAP_H_ |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.