67 lines
1.3 KiB
Go
67 lines
1.3 KiB
Go
// Copyright (C) 2019 Storj Labs, Inc.
|
|
// See LICENSE for copying information.
|
|
|
|
package main
|
|
|
|
import (
|
|
"sync"
|
|
)
|
|
|
|
import "C"
|
|
|
|
var universe = NewUniverse()
|
|
|
|
// Handle is a generic handle.
|
|
type Handle = C.long
|
|
|
|
// Universe stores different Go values that need to be accessed from Go side.
|
|
type Universe struct {
|
|
lock sync.Mutex
|
|
nextid Handle
|
|
values map[Handle]interface{}
|
|
}
|
|
|
|
// NewUniverse creates a place to store go files by handle.
|
|
func NewUniverse() *Universe {
|
|
return &Universe{
|
|
values: make(map[Handle]interface{}),
|
|
}
|
|
}
|
|
|
|
// Add adds a value to the table.
|
|
func (m *Universe) Add(x interface{}) Handle {
|
|
m.lock.Lock()
|
|
defer m.lock.Unlock()
|
|
|
|
m.nextid++
|
|
m.values[m.nextid] = x
|
|
return m.nextid
|
|
}
|
|
|
|
// Get gets a value.
|
|
func (m *Universe) Get(x Handle) interface{} {
|
|
m.lock.Lock()
|
|
defer m.lock.Unlock()
|
|
return m.values[x]
|
|
}
|
|
|
|
// Del deletes the value
|
|
func (m *Universe) Del(x Handle) {
|
|
m.lock.Lock()
|
|
defer m.lock.Unlock()
|
|
delete(m.values, x)
|
|
}
|
|
|
|
// Empty returns whether the universe is empty.
|
|
func (m *Universe) Empty() bool {
|
|
m.lock.Lock()
|
|
defer m.lock.Unlock()
|
|
return len(m.values) == 0
|
|
}
|
|
|
|
//export internal_UniverseIsEmpty
|
|
// internal_UniverseIsEmpty returns true if nothing is stored in the global map.
|
|
func internal_UniverseIsEmpty() bool {
|
|
return universe.Empty()
|
|
}
|