MLPL

A library of commonly used functions.

One of the reasons we created this library

• Some functions available on Linux are typically C-style such as sem_wait(), sprintf() etc. By Wrapping them with C++'s features we can make code simple. For example, explicit initialization or free can be automated by a constructor and a destructor.

Classes

• AtomicValue: Atomic operation

  • get(), set(), add(), sub(), etc.

  • internally uses gcc's builtin functions such as __sync_fetch_and_add().

  • We can use instances as if they are native type by operator's overload.

    AtomicValue<int> a, b;
    a = 1;
    b = a;

• EventSemaphore

  • A semaphore using EventFd (A feature of Linux)
  • We can wait for a semaphore with GLibEvent Loop based on poll().

• Logger

  • MLPL_X() (X: DBG, INFO, WARN, ERR, CRIT, BUG) writes a message both to stderr and syslog.

    MLPL_INFO ("My name: %s, Age: %d\n", name, age);

• MutexLock

  • lock(), unlock(), and timedlock().

• ParsableString

  • We can parse a string from the top with specifying a separator.

• ReadWriteLock

  • readLock(), writeLock(), and unlock()

• Reaper

  • An auto pointer helper.

  • deletes an object or a buffer at the end of the block.

  • works even when an exception is thrown.

    MutexLock lock;
    Reaper unlocker(&lock, MutexLock::unlock);

    char *buf = malloc(100);
    Reaper<char *> reaper(buf, free);

• SmartTime: holds time (sec and nanosec)

  • Constructor(INIT_CURR_TIME)
  • Constructor(const timespec &ts)
  • Comparators: <, >, <=, >=, ==
  • Add/Sub: +=, -=

• StringUtils

  • sprintf()