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@dondragmer
dondragmer / PrefixSort.compute
Created January 20, 2021 23:32
An optimized GPU counting sort
#pragma use_dxc //enable SM 6.0 features, in Unity this is only supported on version 2020.2.0a8 or later with D3D12 enabled
#pragma kernel CountTotalsInBlock
#pragma kernel BlockCountPostfixSum
#pragma kernel CalculateOffsetsForEachKey
#pragma kernel FinalSort
uint _FirstBitToSort;
int _NumElements;
int _NumBlocks;
bool _ShouldSortPayload;
# IDA (disassembler) and Hex-Rays (decompiler) plugin for Apple AMX
#
# WIP research. (This was edited to add more info after someone posted it to
# Hacker News. Click "Revisions" to see full changes.)
#
# Copyright (c) 2020 dougallj
# Based on Python port of VMX intrinsics plugin:
# Copyright (c) 2019 w4kfu - Synacktiv
@steipete
steipete / OSLogStream.swift
Last active November 7, 2023 22:25
Access streaming OSLogStore at runtime with SPI. (FB8519418) https://steipete.com/posts/logging-in-swift/
//
// OSLogStream.swift
// LoggingTest
//
// Created by Peter Steinberger on 24.08.20.
//
// Requires importing https://github.com/apple/llvm-project/blob/apple/master/lldb/tools/debugserver/source/MacOSX/DarwinLog/ActivityStreamSPI.h via bridging header
import Foundation

Debugging the Swift Toolchain

Use these steps to debug components of the Swift toolchain. This allows you to see Swift's source code from the debugger – instead of disassembly. The debugger can also provide some variable names and values. This has been initially tested with libswiftCore.dylib.

These instructions were updated as of Swift 5.2.1.

Prerequisites

@IsaacXen
IsaacXen / README.md
Last active June 21, 2024 01:41
(Almost) Every WWDC videos download links for aria2c.
@danielmartin
danielmartin / BetterXcodeJumpToCounterpartSwift.org
Last active March 9, 2024 02:00
Add support for a better Xcode's Jump to Next Counterpart in Swift

If you work on a Swift project that follows the Model-View-ViewModel (MVVM) architecture or similar, you may want to jump to counterpart in Xcode from your view to your model, and then to your view model. (ie. by using Ctrl+Cmd+Up and Ctrl+Cmd+Down).

You can do this in recent versions of Xcode by setting a configuration default.

From a terminal, just type this command and press Enter:

defaults write com.apple.dt.Xcode IDEAdditionalCounterpartSuffixes -array-add "ViewModel" "View"
@knightsc
knightsc / inject.c
Last active May 21, 2024 15:22
An example of how to inject code to call dlopen and load a dylib into a remote mach task. Tested on 10.13.6 and 10.14.3
#include <dlfcn.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <mach/mach.h>
#include <mach/error.h>
#include <errno.h>
#include <stdlib.h>
#include <sys/sysctl.h>
#include <sys/mman.h>
@douglashill
douglashill / KeyboardTableView.swift
Last active March 30, 2023 22:01
A UITableView that allows navigation and selection using a hardware keyboard.
// Douglas Hill, December 2018
// Made for https://douglashill.co/reading-app/
// Find the latest version of this file at https://github.com/douglashill/KeyboardKit
import UIKit
/// A table view that allows navigation and selection using a hardware keyboard.
/// Only supports a single section.
class KeyboardTableView: UITableView {
// These properties may be set or overridden to provide discoverability titles for key commands.
@tclementdev
tclementdev / libdispatch-efficiency-tips.md
Last active June 27, 2024 10:27
Making efficient use of the libdispatch (GCD)

libdispatch efficiency tips

The libdispatch is one of the most misused API due to the way it was presented to us when it was introduced and for many years after that, and due to the confusing documentation and API. This page is a compilation of important things to know if you're going to use this library. Many references are available at the end of this document pointing to comments from Apple's very own libdispatch maintainer (Pierre Habouzit).

My take-aways are:

  • You should create very few, long-lived, well-defined queues. These queues should be seen as execution contexts in your program (gui, background work, ...) that benefit from executing in parallel. An important thing to note is that if these queues are all active at once, you will get as many threads running. In most apps, you probably do not need to create more than 3 or 4 queues.

  • Go serial first, and as you find performance bottle necks, measure why, and if concurrency helps, apply with care, always validating under system pressure. Reuse

@mortenbekditlevsen
mortenbekditlevsen / phantom.swift
Created March 26, 2018 07:17
Example of using Phantom generics to create a hierarchy reflecting a firebase rtdb tree structure
import Foundation
// Note: This code is inspired by the objc.io talk: https://talk.objc.io/episodes/S01E71-type-safe-file-paths-with-phantom-types
// Background: For a project, we were already using Firebase along with RxSwift.
// For this purpose we have a protocol, NetworkServiceType providing the API to the Firebase functionality. The reason for this is that we could potentially switch to a different technology in case we wanted to.
// In this playground I will just write dummy-implementations for NetworkServiceType, FirebaseService and for the RxSwift Observable since these are separate concerns.
// Dummy 'Observable'
enum Observable<T> {