mirror of
https://github.com/IBM/fp-go.git
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fix: add WithLock to limit concurrency
Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com>
This commit is contained in:
30
io/bracket.go
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30
io/bracket.go
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// Copyright (c) 2023 IBM Corp.
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// All rights reserved.
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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 io
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import (
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G "github.com/IBM/fp-go/io/generic"
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)
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// Bracket makes sure that a resource is cleaned up in the event of an error. The release action is called regardless of
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// whether the body action returns and error or not.
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func Bracket[A, B, ANY any](
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acquire IO[A],
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use func(A) IO[B],
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release func(A, B) IO[ANY],
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) IO[B] {
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return G.Bracket(acquire, use, release)
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}
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44
io/generic/bracket.go
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44
io/generic/bracket.go
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@@ -0,0 +1,44 @@
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// Copyright (c) 2023 IBM Corp.
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// All rights reserved.
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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 generic
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import (
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G "github.com/IBM/fp-go/internal/bracket"
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)
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// Bracket makes sure that a resource is cleaned up in the event of an error. The release action is called regardless of
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// whether the body action returns and error or not.
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func Bracket[
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GA ~func() A,
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GB ~func() B,
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GANY ~func() ANY,
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A, B, ANY any](
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acquire GA,
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use func(A) GB,
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release func(A, B) GANY,
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) GB {
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return G.Bracket[GA, GB, GANY, B, A, B](
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Of[GB, B],
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MonadChain[GA, GB, A, B],
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MonadChain[GB, GB, B, B],
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MonadChain[GANY, GB, ANY, B],
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acquire,
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use,
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release,
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)
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}
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30
io/generic/sync.go
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30
io/generic/sync.go
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@@ -0,0 +1,30 @@
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// Copyright (c) 2023 IBM Corp.
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// All rights reserved.
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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 generic
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import (
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"context"
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)
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// WithLock executes the provided IO operation in the scope of a lock
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func WithLock[GA ~func() A, A any](lock func() context.CancelFunc) func(fa GA) GA {
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return func(fa GA) GA {
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return func() A {
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defer lock()()
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return fa()
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}
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}
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}
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28
io/sync.go
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28
io/sync.go
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@@ -0,0 +1,28 @@
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// Copyright (c) 2023 IBM Corp.
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// All rights reserved.
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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 io
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import (
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"context"
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G "github.com/IBM/fp-go/io/generic"
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L "github.com/IBM/fp-go/lazy"
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)
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// WithLock executes the provided [IO] operation in the scope of a lock
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func WithLock[A any](lock L.Lazy[context.CancelFunc]) func(fa IO[A]) IO[A] {
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return G.WithLock[IO[A]](lock)
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}
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