lorentey

Low-Level Atomic Operations ⚛︎

• Author: Karoy Lorentey
• Version: 2020-04-13/1
• Document URL: https://gist.github.com/lorentey/cf8703b5974ebe8f85cfb92a6628880d
• Forum Thread: https://forums.swift.org/t/low-level-atomic-operations/34683
• Implementation:
  • [swiftlang/swift#30553][implementation] (Atomic operations)
  • [swiftlang/swift#26969][constantPR] (Constant-constrained ordering arguments)

NSExceptional

iOS Shared Cache Extraction

Having fallen off the iOS-exploration train due to completing my Masters and other commitments, I have finally climbed back aboard in pursuit of understanding the telephony stack.

Like most things in iOS that are used frequently, the vast majority of the frameworks and libraries used in the telephony stack reside in the DYLD shared cache located at /System/Library/Caches/com.apple.dyld/dyld_shared_cache_armv7.

In this post I am going to explain how to go about extracting this cache file so that you can then work with each library individually.

Get The Cache

The first step in all of this is to copy the cache over to your local machine. I did this using a program called iExplorer, but you can just as easily do it over SSH. As a side note, you can connect to your iDevice using SSH over USB if you install a tool called iProxy.

milseman

State of String: ABI, Performance, Ergonomics, and You!

Hello, I’ve been working on implementing, optimizing, and improving String in preparation for ABI stability, and I thought I’d share the current status of String in Swift 5 and some potential directions to go. This is the product of conversations with open source contributors and my colleagues on the Swift standard library team at Apple.

The primary area of focus is stabilizing String’s ABI, but we’d be remiss if we couldn’t also fit in performance and ergonomic improvements. String’s ergonomics in particular is one area where we think the status quo is woefully inadequate, and over half of this email is devoted to that topic. At the end, there’s a section about a community initiative that we hope can help users of String as well as guide future development.

(Note: I’m sending this to swift-dev because much of the contents revolve around implementation concerns. I’ll also cross-reference on swift-evolution and swift-users. See also the [StringManife

bdash

if ((*(int8_t *)guard variable for __dynamic_cast::use_strcmp == 0x0) && (___cxa_guard_acquire(guard variable for __dynamic_cast::use_strcmp, rsi, rdx, rcx, r8, r9) != 0x0)) {
    rsi = *_NSGetProgname();
    rcx = 0x1;
    if (strcmp("Adobe Illustrator", rsi) != 0x0) {
        rsi = *_NSGetProgname();
        rdx = 0x13;
        rcx = strncmp("Adobe Photoshop CS5", rsi, rdx) == 0x0 ? 0x1 : 0x0;
    }
    *(int8_t *)__dynamic_cast::use_strcmp = rcx;
    ___cxa_guard_release(guard variable for __dynamic_cast::use_strcmp, rsi, rdx, rcx, r8, r9);

rauchg

require-from-twitter

Since Twitter doesn't have an edit button, it's a suitable host for JavaScript modules.

How to use

Source tweet: https://twitter.com/rauchg/status/712799807073419264

const leftPad = await requireFromTwitter('712799807073419264');

ageitgey

Build tensorflow on OSX with NVIDIA CUDA support (GPU acceleration)

These instructions are based on Mistobaan's gist but expanded and updated to work with the latest tensorflow OSX CUDA PR.

Requirements

OS X 10.10 (Yosemite) or newer

steipete

PSPDF_EXTERN BOOL PSPDFIsBlock(id _Nullable block) {
    static Class blockClass;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        blockClass = [^{} class];
        while ([blockClass superclass] != NSObject.class) {
            blockClass = [blockClass superclass];
        }
    });

sharplet

import Darwin

enum Signal: Int32 {
  case HUP    = 1
  case INT    = 2
  case QUIT   = 3
  case ABRT   = 6
  case KILL   = 9
  case ALRM   = 14
  case TERM   = 15

soffchen

Feature

• 替代 PAC，实现根据规则区分选择代理线路
• 支持 SOCKS5 和 Shadowsocks 协议
• 完整支持所有的 Shadowsocks 加密方式 （table, rc4-md5, salsa20, chacha20, aes-256-cfb, aes-192-cfb, aes-128-cfb, bf-cfb, cast5-cfb, des-cfb, rc2-cfb, rc4, seed-cfb）
• 全面支持双向 HTTP Keep-Alvie
• 快，各种黑科技加速
• 直接临时修改某个域名的访问规则 （暂时仅 Mac 版本）
• 支持使用 GeoIP 规则决定线路

Usage

lucholaf

> $PROJECT_DIR/merge.swift; find $PROJECT_DIR/ -iname *.swift -not -name merge.swift -exec cat {} >> $PROJECT_DIR/merge.swift \;