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// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
#ifndef BOXED_REGION_H
#define BOXED_REGION_H
#include <stdlib.h>
struct type_desc;
class memory_region;
struct rust_opaque_box;
struct rust_env;
/* Tracks the data allocated by a particular task in the '@' region.
* Currently still relies on the standard malloc as a backing allocator, but
* this could be improved someday if necessary. Every allocation must provide
* a type descr which describes the payload (what follows the header). */
class boxed_region {
private:
rust_env *env;
memory_region *backing_region;
rust_opaque_box *live_allocs;
size_t align_to(size_t v, size_t align) {
size_t alignm1 = align - 1;
v += alignm1;
v &= ~alignm1;
return v;
}
private:
// private and undefined to disable copying
boxed_region(const boxed_region& rhs);
boxed_region& operator=(const boxed_region& rhs);
public:
boxed_region(rust_env *e, memory_region *br)
: env(e)
, backing_region(br)
, live_allocs(NULL)
{}
rust_opaque_box *first_live_alloc() { return live_allocs; }
rust_opaque_box *malloc(type_desc *td, size_t body_size);
rust_opaque_box *calloc(type_desc *td, size_t body_size);
rust_opaque_box *realloc(rust_opaque_box *box, size_t new_size);
void free(rust_opaque_box *box);
};
#endif /* BOXED_REGION_H */
//
// Local Variables:
// mode: C++
// fill-column: 78;
// indent-tabs-mode: nil
// c-basic-offset: 4
// buffer-file-coding-system: utf-8-unix
// End:
//
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