Magic-Mirror/gecko-dev
1
0
Fork 0
mirror of https://github.com/mozilla/gecko-dev.git synced 2025-02-21 09:49:14 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Bug 1291707 part 2 - Add GetAndRemove to nsDataHashtable. r=froydnj

Browse Source 
MozReview-Commit-ID: 24zlYwsRGsF

--HG--
extra : rebase_source : 904c62cd779133666904d3167cb7e7c31f95a412
extra : source : 6c1df15aad607e70547b51011bd352d8a8bf826d
This commit is contained in:
Xidorn Quan 2016-08-23 10:31:26 +10:00
parent a0c0bf51d9
commit fab96c1410
1 changed files with 26 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
xpcom/glue/nsDataHashtable.h
View File

@ -9,6 +9,7 @@
#include "nsHashKeys.h"
#include "nsBaseHashtable.h"
#include "mozilla/Maybe.h"
/**
* templated hashtable class maps keys to simple datatypes.
@ -22,12 +23,36 @@ template<class KeyClass, class DataType>
class nsDataHashtable
: public nsBaseHashtable<KeyClass, DataType, DataType>
{
private:
typedef nsBaseHashtable<KeyClass, DataType, DataType> BaseClass;
public:
using typename BaseClass::KeyType;
using typename BaseClass::EntryType;
nsDataHashtable() {}
explicit nsDataHashtable(uint32_t aInitLength)
: nsBaseHashtable<KeyClass, DataType, DataType>(aInitLength)
: BaseClass(aInitLength)
{
}
/**
* Retrieve the value for a key and remove the corresponding entry at
* the same time.
*
* @param aKey the key to retrieve and remove
* @return the found value, or Nothing if no entry was found with the
* given key.
*/
mozilla::Maybe<DataType> GetAndRemove(KeyType aKey)
{
mozilla::Maybe<DataType> value;
if (EntryType* ent = this->GetEntry(aKey)) {
value.emplace(mozilla::Move(ent->mData));
this->RemoveEntry(ent);
}
return value;
}
};
#endif // nsDataHashtable_h__