diff options
Diffstat (limited to 'freelist.go')
| -rw-r--r-- | freelist.go | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/freelist.go b/freelist.go index 0161948..d32f6cd 100644 --- a/freelist.go +++ b/freelist.go @@ -166,12 +166,16 @@ func (f *freelist) read(p *page) { } // Copy the list of page ids from the freelist. - ids := ((*[maxAllocSize]pgid)(unsafe.Pointer(&p.ptr)))[idx:count] - f.ids = make([]pgid, len(ids)) - copy(f.ids, ids) + if count == 0 { + f.ids = nil + } else { + ids := ((*[maxAllocSize]pgid)(unsafe.Pointer(&p.ptr)))[idx:count] + f.ids = make([]pgid, len(ids)) + copy(f.ids, ids) - // Make sure they're sorted. - sort.Sort(pgids(f.ids)) + // Make sure they're sorted. + sort.Sort(pgids(f.ids)) + } // Rebuild the page cache. f.reindex() @@ -189,7 +193,9 @@ func (f *freelist) write(p *page) error { // The page.count can only hold up to 64k elements so if we overflow that // number then we handle it by putting the size in the first element. - if len(ids) < 0xFFFF { + if len(ids) == 0 { + p.count = uint16(len(ids)) + } else if len(ids) < 0xFFFF { p.count = uint16(len(ids)) copy(((*[maxAllocSize]pgid)(unsafe.Pointer(&p.ptr)))[:], ids) } else { @@ -230,7 +236,7 @@ func (f *freelist) reload(p *page) { // reindex rebuilds the free cache based on available and pending free lists. func (f *freelist) reindex() { - f.cache = make(map[pgid]bool) + f.cache = make(map[pgid]bool, len(f.ids)) for _, id := range f.ids { f.cache[id] = true } |