wehub-resource-sync
40 lines
1.3 KiB
Swift
40 lines
1.3 KiB
Swift
//===----------------------------------------------------------------------===//
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// Copyright © 2025-2026 Apple Inc. and the Containerization project authors.
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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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// https://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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//===----------------------------------------------------------------------===//
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#if canImport(Musl)
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import Musl
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#elseif canImport(Glibc)
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import Glibc
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#elseif canImport(Darwin)
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import Darwin
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#else
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#error("retryingSyscall not supported on this platform.")
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#endif
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/// Helper type to deal with running system calls.
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public struct Syscall {
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/// Retry a syscall on EINTR.
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public static func retrying<T: FixedWidthInteger>(_ closure: () -> T) -> T {
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while true {
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let res = closure()
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if res == -1 && errno == EINTR {
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continue
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}
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return res
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}
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}
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}
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