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Arena storage pool: Difference between revisions
Copied implementation from https://github.com/Hoverbear/rust-rosetta
(Copied implementation from https://github.com/Hoverbear/rust-rosetta) |
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Line 598:
drop stemmed_array.</lang>
=={{header|Scala}}==
<lang rust>#![feature(rustc_private)]
extern crate arena;
use arena::TypedArena;
fn main() {
// Memory is allocated using the default allocator (currently jemalloc). The memory is
// allocated in chunks, and when one chunk is full another is allocated. This ensures that
// references to an arena don't become invalid when the original chunk runs out of space. The
// chunk size is configurable as an argument to TypedArena::with_capacity if necessary.
let arena = TypedArena::new();
// The arena crate contains two types of arenas: TypedArena and Arena. Arena is
// reflection-basd and slower, but can allocate objects of any type. TypedArena is faster, and
// can allocate only objects of one type. The type is determined by type inference--if you try
// to allocate an integer, then Rust's compiler knows it is an integer arena.
let v1 = arena.alloc(1i32);
// TypedArena returns a mutable reference
let v2 = arena.alloc(3);
*v2 += 38;
println!("{}", *v1 + *v2);
// The arena's destructor is called as it goes out of scope, at which point it deallocates
// everything stored within it at once.
}</lang>
=={{header|Scala}}==
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