Gavin Ray GavinRay97

Technical Evangelist @hasura

GavinRay97 / flags.txt

Last active May 31, 2024 10:34

Good Clang C++ Flags

	# Created with: $ diagtool tree

	-Wall
	-Wextra
	-Wpedantic

	-Warray-bounds-pointer-arithmetic
	-Wbind-to-temporary-copy
	-Wcalled-once-parameter
	-Wcast-align

GavinRay97 / build.sh

Last active December 20, 2022 20:45

LLVM CMake Fast Build

	# From ~/projects/llvm-project/
	# "compiler-rt" is needed so that you can link against it, otherwise you'll get errors when using -fsanitizer about libclang_rt.san
	$ cmake -S llvm -B build -G Ninja \
	-DLLVM_ENABLE_PROJECTS="clang;clang-tools-extra;lld;lldb" \
	-DLLVM_ENABLE_RUNTIMES="compiler-rt;libcxx;libcxxabi" \
	-DLLVM_TARGETS_TO_BUILD=X86 \
	-DLLVM_INCLUDE_TESTS=OFF \
	-DLLVM_CCACHE_BUILD=ON \
	-DLLVM_USE_LINKER=mold \
	-DCMAKE_BUILD_TYPE=Release \

GavinRay97 / docker-compose.yaml

Created October 28, 2022 17:34

Docker Compose single-file volume (IE, set Postgres seed data)

	version: "3.6"

	services:
	postgres:
	image: postgres:15
	restart: always
	volumes:
	- db_data:/var/lib/postgresql/data
	- type: bind
	source: ./docker/postgres/chinook.sql

GavinRay97 / coroutines.cpp

Created October 28, 2022 17:11

Seastar Coroutine comparison

	int main(int argc, char** argv)
	{
	seastar::sharded<buffer_pool_service> buffer_pool_service;
	seastar::app_template app;

	app.add_options()(
	"db-file", boost::program_options::value<std::string>()->default_value("db.dat"), "Database file");

	return app.run(argc, argv, [&] -> seastar::future<int> {
	seastar::engine().at_exit([&buffer_pool_service] { return buffer_pool_service.stop(); });

GavinRay97 / .clang-format

Created October 26, 2022 02:26

clang-format and clang-tidy config

	BasedOnStyle: Microsoft
	ColumnLimit: 120
	PointerAlignment: Left
	AlwaysBreakTemplateDeclarations: Yes
	SortIncludes: CaseSensitive


	AlignArrayOfStructures: Right
	AlignConsecutiveAssignments: Consecutive
	AlignConsecutiveBitFields: Consecutive

GavinRay97 / main.zig

Created October 15, 2022 20:21

Zig Buffer Pool Manager [Blogpost]

	const std = @import("std");

	const PAGE_SIZE = 4096;
	const BUFFER_POOL_NUM_PAGES = 1000;

	/////////////////////////
	// DISK MANAGER
	/////////////////////////

	const IoUringDiskManager = struct {

GavinRay97 / code.java

Last active October 7, 2022 22:30

Quarkus v2.13.0-Final benchmarks, Loom vs Standard, Reactive SQL vs JDBC

	@ApplicationScoped
	public class PersonRepositoryAsyncAwait {

	@Inject
	PgPool pgPool;

	public Person findById(Long id) {
	RowSet<Row> rowSet = pgPool
	.preparedQuery("SELECT id, name, age, gender FROM person WHERE id = $1")
	.executeAndAwait(Tuple.of(id));

GavinRay97 / io_uring.java

Last active September 23, 2022 20:08

io_uring Panama draft

	class IoUringExample {
	private static int QUEUE_DEPTH = 8;
	private static MemorySession session = MemorySession.global();

	private static GroupLayout myStructLayout = MemoryLayout.structLayout(
	Constants.C_INT.withName("foo"),
	Constants.C_INT.withName("bar"));

	private static VarHandle myStruct$foo = myStructLayout.varHandle(MemoryLayout.PathElement.groupElement("foo"));
	private static VarHandle myStruct$bar = myStructLayout.varHandle(MemoryLayout.PathElement.groupElement("bar"));

GavinRay97 / example.sh

Created September 21, 2022 16:51

Use ctags to extract names of all functions in a C header

$ ctags --language-force=C -x --_xformat="%N:%{typeref}:%{signature}" --kinds-C=p libfoo.h

GavinRay97 / Dockerfile

Created September 21, 2022 15:00

OpenJDK build environment

	FROM quay.io/fedora/fedora:38

	# Install requirements for building OpenJDK from source
	RUN dnf install -y \
	file \
	diffutils \
	alsa-lib-devel \
	cups-devel \
	fontconfig-devel \
	freetype-devel \