49 lines
1.5 KiB
Rust
49 lines
1.5 KiB
Rust
// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//! The global (exchange) heap.
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use libc::{c_void, size_t, free, malloc, realloc};
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use core::ptr::{RawPtr, mut_null};
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/// A wrapper around libc::malloc, aborting on out-of-memory.
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#[inline]
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pub unsafe fn malloc_raw(size: uint) -> *mut u8 {
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// `malloc(0)` may allocate, but it may also return a null pointer
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// http://pubs.opengroup.org/onlinepubs/9699919799/functions/malloc.html
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if size == 0 {
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mut_null()
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} else {
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let p = malloc(size as size_t);
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if p.is_null() {
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::oom();
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}
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p as *mut u8
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}
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}
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/// A wrapper around libc::realloc, aborting on out-of-memory.
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#[inline]
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pub unsafe fn realloc_raw(ptr: *mut u8, size: uint) -> *mut u8 {
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// `realloc(ptr, 0)` may allocate, but it may also return a null pointer
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// http://pubs.opengroup.org/onlinepubs/9699919799/functions/realloc.html
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if size == 0 {
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free(ptr as *mut c_void);
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mut_null()
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} else {
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let p = realloc(ptr as *mut c_void, size as size_t);
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if p.is_null() {
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::oom();
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}
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p as *mut u8
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}
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}
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