meld VM

This is a C++ bytecode VM for Meld.

Dependencies

• Boost
  • MPI (optional)
  • Threads
• libreadline
  • A compiler
    • G++ 4.4/4.2, maybe 4.6
    • LLVM/Clang also works

Execution: meld-bbsim: for running under visibleSim meld-mpi: for running under mpi meld -a bbsim or meld -a mpi will invoke the correct executable

Use -D to enter debugging mode
Use ./meld -h for help

Installation/Instructions

See Instructions.md

Source Tree Overview

Directories:

• db: implements the database, including facts (tuples) and nodes
• external: implements the available external functions (callable in meld programs)
• mem: memory allocator for objects used during execution. This improves multithreaded performance since the default allocator is sequential.
• process: the machine class starts the execution of the virtual machine (program argument, scheduler type and number of threads). There are also MPI management classes.
• queue: many types of queues here, including priority queues. It's all template code.
• runtime: classes for list and string objects used for meld objects.
• sched: sched::base is the base class for all the available schedulers. A scheduler implements a way of executing meld. The simplest scheduler is sched/serial for sequential execution.
• stat: code for generating execution statistics.
• thread: multithreaded schedulers.
• ui: manages communication with browser interface.
• utils: utilities.
• vm: the core of the virtual machine, executes VM instructions.

Important files:

• meld.cpp: main meld program.
• server.cpp: server program for using the web interface.