59 lines
1.0 KiB
Go
59 lines
1.0 KiB
Go
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// 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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// handle is a generic handle.
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type handle = C.long
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// handles stores different Go values that need to be accessed from Go side.
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type handles 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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// newHandles creates a place to store go files by handle.
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func newHandles() *handles {
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return &handles{
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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 *handles) 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 *handles) 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 *handles) 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 handles is empty.
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func (m *handles) 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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