alendit’s gists

alendit / CMakeLists.txt

Last active November 20, 2018 06:49

Building 1kk string of 10 chars each in arrow-cpp

	cmake_minimum_required(VERSION 3.10)

	LIST(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/arrow/cpp/cmake_modules")

	find_package(Arrow)

	include_directories(${ARROW_INCLUDE_DIR})

	MESSAGE( STATUS ${ARROW_INCLUDE_DIR})

alendit / gist:32ebfbc1e5a4c2ff3190ed8b77e0a990

Created November 19, 2018 15:47

Build 1kk string with 10 chars each using numba builder.

alendit / handle.cpp

Created October 8, 2018 16:26

`new_handle` / `from_handle` example script

	// compile with g++ -fpic -shared handle.cpp -o libhandle.so
	#include <cstdint>

	extern "C" {
	using LuaHandle = uint64_t;
	LuaHandle maybe(LuaHandle h, bool ret) {
	if (ret) return h;
	return 0;
	}
	}

alendit / call_printf.py

Last active March 9, 2024 16:49

Call c `printf` from llvmlite

	import llvmlite.ir as ir
	import llvmlite.binding as llvm
	from ctypes import CFUNCTYPE


	def main():
	m = ir.Module()
	func_ty = ir.FunctionType(ir.VoidType(), [])
	i32_ty = ir.IntType(32)
	func = ir.Function(m, func_ty, name="printer")

alendit / composable.py

Created April 24, 2018 09:12

Haskell-like composition for python functions

	def composable(func, contains=None):
	class Wrapper:
	@wraps(func)
	def __call__(self, args, *kwargs):
	return func(args, *kwargs)
	def __getattr__(self, name):
	if name in locals():
	comp = locals[name]
	elif name in globals():
	comp = globals()[name]

alendit / rb_stream_rw.cpp

Created April 17, 2018 08:00

RecordBatch stream writing and reading

alendit / buffer_slices2.cpp

Created April 11, 2018 11:39

MutableSlices failing after dealloc

	#include <arrow/buffer.h>
	#include <memory>
	#include <iostream>

	using namespace arrow;
	using namespace std;

	auto main(int argc, char* argv[]) -> int {
	int64_t size = 16;
	auto* memory = static_cast<uint8_t*>(malloc(size));

alendit / buffer_test.cpp

Last active April 11, 2018 06:59

BufferSlices crash

	#include <arrow/buffer.h>
	#include <memory>
	#include <iostream>

	using namespace arrow;
	using namespace std;

	auto main(int argc, char* argv[]) -> int {
	auto pool_buffer = make_shared<PoolBuffer>(default_memory_pool());
	pool_buffer->Resize(16);

alendit / status_benchmark.cpp

Last active April 5, 2018 13:17

Benchmark for the arrow::Status destructor slowdown. Must be compiled with `-lbenchmark` (google benchmark).

	#include <arrow/status.h>
	#include <benchmark/benchmark.h>
	#include <string>
	#include <iostream>

	using namespace arrow;

	#define REPEAT_N(N, BODY) \
	for (int idx=0;idx<N;++idx) { \
	BODY \

alendit / gist:4a3b456f7092f1d6c94b5c357f944ac3

Created October 1, 2017 14:18

Bundestagswahl 2017: der Bundeswahlleister-Scrapper

Dimitri Vorona alendit