82 lines
1.7 KiB
Go
82 lines
1.7 KiB
Go
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// Copyright 2020 Coinbase, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package indexer
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import (
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"sync"
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)
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type waitTable struct {
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table map[string]*waitTableEntry
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// lock is held when we want to perform multiple
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// reads/writes to waiter.
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lock sync.Mutex
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}
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func newWaitTable() *waitTable {
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return &waitTable{
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table: map[string]*waitTableEntry{},
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}
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}
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func (t *waitTable) Lock() {
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t.lock.Lock()
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}
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func (t *waitTable) Unlock() {
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t.lock.Unlock()
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}
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func (t *waitTable) Get(key string, unsafe bool) (*waitTableEntry, bool) {
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if !unsafe {
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t.lock.Lock()
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defer t.lock.Unlock()
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}
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v, ok := t.table[key]
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if !ok {
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return nil, false
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}
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return v, true
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}
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func (t *waitTable) Set(key string, value *waitTableEntry, unsafe bool) {
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if !unsafe {
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t.lock.Lock()
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defer t.lock.Unlock()
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}
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t.table[key] = value
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}
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func (t *waitTable) Delete(key string, unsafe bool) {
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if !unsafe {
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t.lock.Lock()
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defer t.lock.Unlock()
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}
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delete(t.table, key)
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}
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type waitTableEntry struct {
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listeners int // need to know when to delete entry (i.e. when no listeners)
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channel chan struct{}
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channelClosed bool // needed to know if we should abort (can't read if channel is closed)
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aborted bool
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earliestBlock int64
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}
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