matteobertozzi

/* gcc atomic-queue.c -mcx16 */
/* 
Copyright (c) 2011, Matteo Bertozzi
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
    * Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright

matteobertozzi

/* LRU cache
 * gcc -Wall cache.c -lpthread && ./a.out 
 */
#include <pthread.h>

#include <string.h>
#include <stdlib.h>
#include <stdio.h>

struct cache_entry {

matteobertozzi

#!/usr/bin/env python

def balanced_groups(ngroups, items):
    items = sorted(items)
    wgroups = [0] * ngroups
    groups = [[] for _ in xrange(ngroups)]

    g = 0
    lo = 0
    dir = 1

matteobertozzi

/*
 * Variable length int encoding. The 1st byte contains the number of bytes left.
 * Compared to the 7bit vint-encoding, is worst on small numbers (< 21bit) but 
 * better with large numbers.
 *
 * 0: 11110000 -> 4          v7
 * 1: 00000000 -> 8 (12)     v7 (14)
 * 2: 00000000 -> 8 (20)     v7 (21)
 * 3: 00000000 -> 8 (28)     v7 (28)
 * 4: 00000000 -> 8 (36)     v7 (35)

matteobertozzi

import java.io.*;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.*;
import org.apache.hadoop.hbase.client.*;
import org.apache.hadoop.hbase.util.*;

public class HBaseFill {
  private static void createTable(final HBaseAdmin admin, final byte[] tableName, 
      final byte[]... families) throws IOException {

matteobertozzi

struct rwlock {
  volatile uint32_t state;
};

static void __rwlock_init (struct rwlock *lock) {
  lock->state = 0;
}

static void __read_lock (struct rwlock *lock) {
  unsigned int new_state;

matteobertozzi

#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

struct node {
  struct node *onext;
  struct node *cnext;
  int type;
  int value;
};

matteobertozzi

#!/usr/bin/env python


NOTES = ['A', 'A#', 'B', 'C', 'C#', 'D', 'D#', 'E', 'F', 'F#', 'G', 'G#']
note_name = lambda n: NOTES[n % len(NOTES)]

SCALES = {
  'Major (Ionian)': [2, 2, 1, 2, 2, 2, 1],
  'Major Pentatonic': [2, 2, 3, 2, 3],
  'Natural minor (Aeolian)' : [2,1,2,2,1,2,2],

matteobertozzi

# th30z@u1310:[Desktop]$ psql -h localhost -p 55432
# Password: 
# psql (9.1.10, server 0.0.0)
# WARNING: psql version 9.1, server version 0.0.
#          Some psql features might not work.
# Type "help" for help.
# 
# th30z=> select foo;
#  a | b 
# ---+---

matteobertozzi

#!/usr/bin/env python
#
#   Copyright 2014 Matteo Bertozzi
#
#   Licensed under the Apache License, Version 2.0 (the "License");
#   you may not use this file except in compliance with the License.
#   You may obtain a copy of the License at
#
#       http://www.apache.org/licenses/LICENSE-2.0
#