Merge commit '7621e2f8dec938cf48181c8b10afc9b01f444e68' into beta

submodules/ManagedFile/BUILD

@@ -0,0 +1,18 @@
+load("@build_bazel_rules_swift//swift:swift.bzl", "swift_library")
+
+swift_library(
+    name = "ManagedFile",
+    module_name = "ManagedFile",
+    srcs = glob([
+		"Sources/**/*.swift",
+    ]),
+    copts = [
+        "-warnings-as-errors",
+    ],
+    deps = [
+        "//submodules/SSignalKit/SwiftSignalKit:SwiftSignalKit",
+    ],
+    visibility = [
+        "//visibility:public",
+    ],
+)

submodules/ManagedFile/Package.swift

@@ -0,0 +1,31 @@
+// swift-tools-version:5.5
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+    name: "ManagedFile",
+    platforms: [.macOS(.v10_13)],
+    products: [
+        // Products define the executables and libraries a package produces, and make them visible to other packages.
+        .library(
+            name: "ManagedFile",
+            targets: ["ManagedFile"]),
+    ],
+    dependencies: [
+        // Dependencies declare other packages that this package depends on.
+        // .package(url: /* package url */, from: "1.0.0"),
+        .package(name: "SSignalKit", path: "../../submodules/telegram-ios/submodules/SSignalKit"),
+    ],
+    targets: [
+        // Targets are the basic building blocks of a package. A target can define a module or a test suite.
+        // Targets can depend on other targets in this package, and on products in packages this package depends on.
+        .target(
+            name: "ManagedFile",
+            dependencies: [
+                .product(name: "SwiftSignalKit", package: "SSignalKit", condition: nil),
+            ],
+            path: ".",
+            exclude: ["BUILD"]),
+    ]
+)

submodules/ManagedFile/Sources/ManagedFile.swift

@@ -0,0 +1,185 @@
+import Foundation
+import SwiftSignalKit
+
+private func wrappedWrite(_ fd: Int32, _ data: UnsafeRawPointer, _ count: Int) -> Int {
+    return write(fd, data, count)
+}
+
+private func wrappedRead(_ fd: Int32, _ data: UnsafeMutableRawPointer, _ count: Int) -> Int {
+    return read(fd, data, count)
+}
+
+public final class ManagedFile {
+    public enum Mode {
+        case read
+        case readwrite
+        case append
+    }
+    
+    private let queue: Queue?
+    private let fd: Int32
+    private let mode: Mode
+    private var isClosed: Bool = false
+    
+    public init?(queue: Queue?, path: String, mode: Mode) {
+        if let queue = queue {
+            assert(queue.isCurrent())
+        }
+        self.queue = queue
+        self.mode = mode
+        let fileMode: Int32
+        let accessMode: UInt16
+        switch mode {
+            case .read:
+                fileMode = O_RDONLY
+                accessMode = S_IRUSR
+            case .readwrite:
+                fileMode = O_RDWR | O_CREAT
+                accessMode = S_IRUSR | S_IWUSR
+            case .append:
+                fileMode = O_WRONLY | O_CREAT | O_APPEND
+                accessMode = S_IRUSR | S_IWUSR
+        }
+        let fd = open(path, fileMode, accessMode)
+        if fd >= 0 {
+            self.fd = fd
+        } else {
+            return nil
+        }
+    }
+    
+    deinit {
+        if let queue = self.queue {
+            assert(queue.isCurrent())
+        }
+        if !self.isClosed {
+            close(self.fd)
+        }
+    }
+    
+    public func _unsafeClose() {
+        if let queue = self.queue {
+            assert(queue.isCurrent())
+        }
+        if !self.isClosed {
+            close(self.fd)
+            self.isClosed = true
+        }
+    }
+    
+    public func write(_ data: UnsafeRawPointer, count: Int) -> Int {
+        if let queue = self.queue {
+            assert(queue.isCurrent())
+        }
+        assert(!self.isClosed)
+        return wrappedWrite(self.fd, data, count)
+    }
+    
+    public func read(_ data: UnsafeMutableRawPointer, _ count: Int) -> Int {
+        if let queue = self.queue {
+            assert(queue.isCurrent())
+        }
+        assert(!self.isClosed)
+        return wrappedRead(self.fd, data, count)
+    }
+    
+    public func readData(count: Int) -> Data {
+        if let queue = self.queue {
+            assert(queue.isCurrent())
+        }
+        assert(!self.isClosed)
+        var result = Data(count: count)
+        result.withUnsafeMutableBytes { buffer -> Void in
+            guard let bytes = buffer.baseAddress?.assumingMemoryBound(to: UInt8.self) else {
+                return
+            }
+            let readCount = self.read(bytes, count)
+            assert(readCount == count)
+        }
+        return result
+    }
+    
+    @discardableResult
+    public func seek(position: Int64) -> Bool {
+        if let queue = self.queue {
+            assert(queue.isCurrent())
+        }
+        assert(!self.isClosed)
+        let result = lseek(self.fd, position, SEEK_SET)
+        return result == position
+    }
+    
+    public func truncate(count: Int64) {
+        if let queue = self.queue {
+            assert(queue.isCurrent())
+        }
+        assert(!self.isClosed)
+        ftruncate(self.fd, count)
+    }
+    
+    public func getSize() -> Int64? {
+        if let queue = self.queue {
+            assert(queue.isCurrent())
+        }
+        assert(!self.isClosed)
+        var value = stat()
+        if fstat(self.fd, &value) == 0 {
+            return value.st_size
+        } else {
+            return nil
+        }
+    }
+    
+    public func position() -> Int64 {
+        if let queue = self.queue {
+            assert(queue.isCurrent())
+        }
+        assert(!self.isClosed)
+        
+        return lseek(self.fd, 0, SEEK_CUR);
+    }
+    
+    public func sync() {
+        if let queue = self.queue {
+            assert(queue.isCurrent())
+        }
+        assert(!self.isClosed)
+        fsync(self.fd)
+    }
+}
+
+public extension ManagedFile {
+    func write(_ data: Data) -> Int {
+        if data.isEmpty {
+            return 0
+        }
+        return data.withUnsafeBytes { bytes -> Int in
+            return self.write(bytes.baseAddress!, count: bytes.count)
+        }
+    }
+    
+    func write(_ value: Int32) {
+        var value = value
+        let _ = self.write(&value, count: 4)
+    }
+    
+    func write(_ value: UInt32) {
+        var value = value
+        let _ = self.write(&value, count: 4)
+    }
+    
+    func write(_ value: Int64) {
+        var value = value
+        let _ = self.write(&value, count: 8)
+    }
+    
+    func write(_ value: UInt64) {
+        var value = value
+        let _ = self.write(&value, count: 8)
+    }
+    
+    func write(_ value: Float32) {
+        var value = value
+        let _ = self.write(&value, count: 4)
+    }
+}