diff options
Diffstat (limited to 'src/internal/runtime/maps/table.go')
| -rw-r--r-- | src/internal/runtime/maps/table.go | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/internal/runtime/maps/table.go b/src/internal/runtime/maps/table.go index cc39c24ab7..de3bc2d381 100644 --- a/src/internal/runtime/maps/table.go +++ b/src/internal/runtime/maps/table.go @@ -1152,3 +1152,22 @@ func (s probeSeq) next() probeSeq { s.offset = (s.offset + s.index) & s.mask return s } + +func (t *table) clone(typ *abi.SwissMapType) *table { + // Shallow copy the table structure. + t2 := new(table) + *t2 = *t + t = t2 + + // We need to just deep copy the groups.data field. + oldGroups := t.groups + newGroups := newGroups(typ, oldGroups.lengthMask+1) + for i := uint64(0); i <= oldGroups.lengthMask; i++ { + oldGroup := oldGroups.group(typ, i) + newGroup := newGroups.group(typ, i) + cloneGroup(typ, newGroup, oldGroup) + } + t.groups = newGroups + + return t +} |