libscriptobject

A C++ 11 library implementing scriptable/serializable objects for big-data map-reduce data stores.

This library handles complex object, array and value hierarchies in a memory efficient and performant data structure. For example the following JS structure can easily be expressed:

{ hello: "world", pi: 3.14159, the_answer: 42, child: { lorem: "ipsum" }, bored: true }

The library uses the standard libc memory allocator with std::shared_ptr<> for object and array reference counting. In this example the object b refers to something declared in the scope of object a:

var a = { great_rock_years: [ 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979 ] };
var b = { old_man_music_years: a.great_rock_years };

Since we are using malloc/free for all objects there is no garbage collector. This is critical for big-data stores where the number of objects count in the hundreds of millions and multi-second collections are not acceptable.

Features:

• A single allocated memory block per object
• Fast member lookup (log N)
• Native type storage
• Support for arrays and nested objects
• Repeated string caching (TODO)
• Shared object definitions
• Script language agnostic - integrates with JavaScript, Python, etc.

Building

Requires:

• GCC 4.9+ or CLANG 3.5+
• GNU Make
• lcov, Ruby, python, python-pip (for test coverage)
• valgrind (for memory analysis)

To build type:

$ make

To build tests with coverage:

$ make test

To create a coverage report:

$ ./coverage.sh

To analyze memory:

$ ./grind.sh