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74 changes: 10 additions & 64 deletions
74
Sources/WalletConnectRelay/WCWebSocketClient/UnfairLock.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,75 +1,21 @@ | ||
| import Foundation | ||
| import Combine | ||
|
|
||
| public final class UnfairLock { | ||
| @usableFromInline let os_lock: UnsafeMutablePointer<os_unfair_lock> | ||
| final class UnfairLock { | ||
| private var _lock: UnsafeMutablePointer<os_unfair_lock> | ||
|
|
||
| public init() { | ||
| self.os_lock = .allocate(capacity: 1) | ||
| os_lock.initialize(to: os_unfair_lock()) | ||
| init() { | ||
| _lock = UnsafeMutablePointer<os_unfair_lock>.allocate(capacity: 1) | ||
| _lock.initialize(to: os_unfair_lock()) | ||
| } | ||
|
|
||
| deinit { | ||
| os_lock.deallocate() | ||
| _lock.deallocate() | ||
| } | ||
|
|
||
| @inlinable | ||
| @inline(__always) | ||
| public func lock() { | ||
| os_unfair_lock_lock(os_lock) | ||
| } | ||
|
|
||
| @inlinable | ||
| @inline(__always) | ||
| public func unlock() { | ||
| os_unfair_lock_unlock(os_lock) | ||
| } | ||
|
|
||
| @discardableResult | ||
| @inlinable | ||
| @inline(__always) | ||
| public func withLock<Result>(body: () throws -> Result) rethrows -> Result { | ||
| os_unfair_lock_lock(os_lock) | ||
| defer { os_unfair_lock_unlock(os_lock) } | ||
| return try body() | ||
| } | ||
|
|
||
| @inlinable | ||
| @inline(__always) | ||
| public func withLock(body: () -> Void) { | ||
| os_unfair_lock_lock(os_lock) | ||
| defer { os_unfair_lock_unlock(os_lock) } | ||
| body() | ||
| } | ||
|
|
||
| @inlinable | ||
| @inline(__always) | ||
| public func assertOwner() { | ||
| os_unfair_lock_assert_owner(os_lock) | ||
| } | ||
|
|
||
| @inlinable | ||
| @inline(__always) | ||
| public func assertNotOwner() { | ||
| os_unfair_lock_assert_not_owner(os_lock) | ||
| } | ||
| } | ||
|
|
||
| extension UnfairLock { | ||
| private final class LockAssertion: Cancellable { | ||
| private var _owner: UnfairLock | ||
|
|
||
| init(owner: UnfairLock) { | ||
| self._owner = owner | ||
| os_unfair_lock_lock(owner.os_lock) | ||
| } | ||
|
|
||
| __consuming func cancel() { | ||
| os_unfair_lock_unlock(_owner.os_lock) | ||
| } | ||
| } | ||
|
|
||
| func acquire() -> Cancellable { | ||
| LockAssertion(owner: self) | ||
| func locked<ReturnValue>(_ f: () throws -> ReturnValue) rethrows -> ReturnValue { | ||
| os_unfair_lock_lock(_lock) | ||
| defer { os_unfair_lock_unlock(_lock) } | ||
| return try f() | ||
| } | ||
| } |
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