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package libs
import "sync"
// globalImports stores []ImportEntry in a place where GC won't
// delete it
type SafeMap struct {
sync.RWMutex
idx int
m map[int]gcmap
}
type gcmap struct {
idx *int
v interface{}
}
func (s *SafeMap) nextidx() int {
s.Lock()
defer s.Unlock()
s.idx++
return s.idx
}
func (s *SafeMap) init() {
s.m = make(map[int]gcmap)
}
func (s *SafeMap) Get(idx int) interface{} {
s.RLock()
defer s.RUnlock()
return s.m[idx].v
}
func (s *SafeMap) Del(idx int) {
s.Lock()
delete(s.m, idx)
s.Unlock()
}
// set accepts an entry and returns an index for it
func (s *SafeMap) Set(ie interface{}) *int {
idx := s.nextidx()
pidx := &idx
s.Lock()
s.m[idx] = gcmap{pidx, ie}
defer s.Unlock()
return pidx
}
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