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package imap
import "sync"
type SeqMap struct {
lock sync.Mutex
// map of IMAP sequence numbers to message UIDs
m map[uint32]uint32
}
func (s *SeqMap) Size() int {
s.lock.Lock()
size := len(s.m)
s.lock.Unlock()
return size
}
func (s *SeqMap) Get(seqnum uint32) (uint32, bool) {
s.lock.Lock()
uid, found := s.m[seqnum]
s.lock.Unlock()
return uid, found
}
func (s *SeqMap) Put(seqnum, uid uint32) {
s.lock.Lock()
if s.m == nil {
s.m = make(map[uint32]uint32)
}
s.m[seqnum] = uid
s.lock.Unlock()
}
func (s *SeqMap) Pop(seqnum uint32) (uint32, bool) {
s.lock.Lock()
uid, found := s.m[seqnum]
if found {
delete(s.m, seqnum)
}
s.lock.Unlock()
return uid, found
}
func (s *SeqMap) Clear() {
s.lock.Lock()
s.m = make(map[uint32]uint32)
s.lock.Unlock()
}
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