fermentord/vendor/github.com/JuulLabs-OSS/cbgo/ptrmap.go

42 lines
630 B
Go
Raw Normal View History

package cbgo
import (
"sync"
"unsafe"
)
// ptrMap is a thread-safe map with pointer keys and generic values.
type ptrMap struct {
m map[unsafe.Pointer]interface{}
mtx sync.RWMutex
}
func newPtrMap() *ptrMap {
return &ptrMap{
m: map[unsafe.Pointer]interface{}{},
}
}
func (pm *ptrMap) find(p unsafe.Pointer) interface{} {
pm.mtx.RLock()
defer pm.mtx.RUnlock()
return pm.m[p]
}
func (pm *ptrMap) add(p unsafe.Pointer, itf interface{}) error {
pm.mtx.Lock()
defer pm.mtx.Unlock()
pm.m[p] = itf
return nil
}
func (pm *ptrMap) del(p unsafe.Pointer) {
pm.mtx.Lock()
defer pm.mtx.Unlock()
delete(pm.m, p)
}