61 lines
1.1 KiB
Go
61 lines
1.1 KiB
Go
// Copyright (C) 2019 Storj Labs, Inc.
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// See LICENSE for copying information.
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package main
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import (
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"sync"
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)
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import "C"
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var universe = NewUniverse()
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// Handle is a generic handle.
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type Handle = C.long
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// Universe stores different Go values that need to be accessed from Go side.
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type Universe struct {
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lock sync.Mutex
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nextid Handle
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values map[Handle]interface{}
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}
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// NewUniverse creates a place to store go files by handle.
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func NewUniverse() *Universe {
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return &Universe{
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values: make(map[Handle]interface{}),
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}
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}
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// Add adds a value to the table.
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func (m *Universe) Add(x interface{}) Handle {
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m.lock.Lock()
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defer m.lock.Unlock()
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m.nextid++
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m.values[m.nextid] = x
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return m.nextid
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}
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// Get gets a value.
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func (m *Universe) Get(x Handle) interface{} {
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m.lock.Lock()
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defer m.lock.Unlock()
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return m.values[x]
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}
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// Del deletes the value
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func (m *Universe) Del(x Handle) {
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m.lock.Lock()
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defer m.lock.Unlock()
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delete(m.values, x)
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}
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// Empty returns whether the universe is empty.
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func (m *Universe) Empty() bool {
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m.lock.Lock()
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defer m.lock.Unlock()
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return len(m.values) == 0
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}
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