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90 lines
2.7 KiB
Go
90 lines
2.7 KiB
Go
// home https://github.com/glycerine/lmdb-go
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// Copyright (c) 2020, the lmdb-go authors
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// Copyright (c) 2015, Bryan Matsuo
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// All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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// Redistributions of source code must retain the above copyright notice, this
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// list of conditions and the following disclaimer.
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// Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// Neither the name of the author nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
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// prior written permission.
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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package pilosa
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import (
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"fmt"
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"sync/atomic"
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"testing"
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"time"
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)
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func TestBarrierHolds(t *testing.T) {
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b := NewBarrier()
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defer b.Close()
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released := int64(0)
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waiter := func(i int) {
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b.WaitAtGate(i)
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//vv("goro %v is released", i)
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atomic.AddInt64(&released, 1)
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}
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for i := 0; i < 3; i++ {
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go waiter(i)
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}
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time.Sleep(time.Second)
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r := atomic.SwapInt64(&released, 0)
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if r != 3 {
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panic("open barrier held back goro")
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}
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//vv("good: barrier started open")
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//seenAll := make(chan bool)
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b.BlockAllReadersNoWait()
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for i := 0; i < 3; i++ {
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go waiter(i)
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}
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time.Sleep(time.Second)
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r = atomic.SwapInt64(&released, 0)
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if r != 0 {
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panic("bad: barrier did not hold back goro")
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}
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//vv("good: barrier of 4 did not release on 3")
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go waiter(4)
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time.Sleep(time.Second)
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r = atomic.SwapInt64(&released, 0)
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if r != 0 {
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panic(fmt.Sprintf("bad: barrier did not hold back goro, should wait for unblock. r = %v", r))
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}
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b.UnblockReaders()
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time.Sleep(time.Second)
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r = atomic.SwapInt64(&released, 0)
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if r != 4 {
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panic("bad: unblock should have released 4 goro")
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}
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}
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