Index: storage/browser/blob/shareable_blob_data_item.h |
diff --git a/storage/browser/blob/shareable_blob_data_item.h b/storage/browser/blob/shareable_blob_data_item.h |
index 4c2f9c1833262d18dfa82b622abdfef8585b9541..4a101efcfb925cf762a4c85b0b177a07c7676b92 100644 |
--- a/storage/browser/blob/shareable_blob_data_item.h |
+++ b/storage/browser/blob/shareable_blob_data_item.h |
@@ -11,40 +11,92 @@ |
#include "base/hash.h" |
#include "base/macros.h" |
#include "base/memory/ref_counted.h" |
+#include "storage/browser/storage_browser_export.h" |
#include "storage/common/data_element.h" |
namespace storage { |
class BlobDataItem; |
class InternalBlobData; |
-// This class allows blob items to be shared between blobs, and is only used by |
-// BlobStorageContext. This class contains both the blob data item and the uuids |
-// of all the blobs using this item. |
+// This class allows blob items to be shared between blobs. This class contains |
+// both the blob data item and the uuids of all the blobs using this item. |
// The data in this class (the item) is immutable, but the item itself can be |
// swapped out with an item with the same data but a different backing (think |
// RAM vs file backed). |
-class ShareableBlobDataItem : public base::RefCounted<ShareableBlobDataItem> { |
+// We need to be RefCountedThreadSafe as references of this item are passed to a |
michaeln
2016/10/11 20:55:24
comment is stale
dmurph
2016/10/13 00:39:31
Done.
|
+// file thread to save old memory items to disk. |
+class STORAGE_EXPORT ShareableBlobDataItem |
+ : public base::RefCounted<ShareableBlobDataItem> { |
public: |
- ShareableBlobDataItem(const std::string& blob_uuid, |
- const scoped_refptr<BlobDataItem>& item); |
+ enum State { |
+ // We're an item that needs quota (either disk or memory). |
+ QUOTA_NEEDED, |
+ // We have requested quota from the BlobMemoryController. |
+ QUOTA_REQUESTED, |
+ // Space has been allocated for this item in the BlobMemoryController, but |
+ // it may not yet be populated. |
+ QUOTA_GRANTED, |
+ // We're a populated item that needed quota. |
+ POPULATED_WITH_QUOTA, |
+ // We're a populated item that didn't need quota. |
+ POPULATED_WITHOUT_QUOTA |
+ }; |
- const scoped_refptr<BlobDataItem>& item(); |
+ ShareableBlobDataItem(const std::string& referencing_blob_uuid, |
+ scoped_refptr<BlobDataItem> item, |
+ State state); |
- base::hash_set<std::string>& referencing_blobs() { |
+ const scoped_refptr<BlobDataItem>& item() const { return item_; } |
+ |
+ scoped_refptr<BlobDataItem>* item_mutable() { return &item_; } |
+ |
+ void set_item(scoped_refptr<BlobDataItem> item); |
+ |
+ // This is a unique auto-incrementing id assigned to this item on |
+ // construction. It is used to keep track of this item in an LRU data |
+ // structure for eviction to disk. |
+ uint64_t item_id() const { return item_id_; } |
+ |
+ const base::hash_set<std::string>& referencing_blobs() const { |
return referencing_blobs_; |
} |
+ base::hash_set<std::string>* referencing_blobs_mutable() { |
+ return &referencing_blobs_; |
+ } |
+ |
+ State state() const { return state_; } |
+ |
+ void set_state(State state) { state_ = state; } |
+ |
+ bool IsPopulated() const { |
+ return state_ == POPULATED_WITH_QUOTA || state_ == POPULATED_WITHOUT_QUOTA; |
+ } |
+ |
+ bool HasGrantedQuota() const { |
+ return state_ == POPULATED_WITH_QUOTA || state_ == QUOTA_GRANTED; |
+ } |
+ |
private: |
friend class base::RefCounted<ShareableBlobDataItem>; |
- friend class InternalBlobData; |
+ friend STORAGE_EXPORT void PrintTo(const ShareableBlobDataItem& x, |
+ ::std::ostream* os); |
+ |
~ShareableBlobDataItem(); |
+ // This is a unique identifier for this ShareableBlobDataItem. |
+ const uint64_t item_id_; |
+ State state_; |
scoped_refptr<BlobDataItem> item_; |
- |
base::hash_set<std::string> referencing_blobs_; |
DISALLOW_COPY_AND_ASSIGN(ShareableBlobDataItem); |
}; |
+STORAGE_EXPORT bool operator==(const ShareableBlobDataItem& a, |
+ const ShareableBlobDataItem& b); |
+STORAGE_EXPORT bool operator!=(const ShareableBlobDataItem& a, |
+ const ShareableBlobDataItem& b); |
+ |
} // namespace storage |
#endif // STORAGE_BROWSER_BLOB_SHAREABLE_BLOB_DATA_ITEM_H_ |