1 files changed, 51 insertions, 0 deletions
diff --git a/src/liballoc/libc_heap.rs b/src/liballoc/libc_heap.rs
new file mode 100644
index 00000000000..5b189bc672e
--- /dev/null
+++ b/src/liballoc/libc_heap.rs
@@ -0,0 +1,51 @@
+// 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.
+
+
+//! The global (exchange) heap.
+
+use libc::{c_void, size_t, free, malloc, realloc};
+use core::ptr::{RawPtr, mut_null};
+use core::intrinsics::abort;
+
+/// A wrapper around libc::malloc, aborting on out-of-memory
+#[inline]
+pub unsafe fn malloc_raw(size: uint) -> *mut u8 {
+    // `malloc(0)` may allocate, but it may also return a null pointer
+    // http://pubs.opengroup.org/onlinepubs/9699919799/functions/malloc.html
+    if size == 0 {
+        mut_null()
+    } else {
+        let p = malloc(size as size_t);
+        if p.is_null() {
+            // we need a non-allocating way to print an error here
+            abort();
+        }
+        p as *mut u8
+    }
+}
+
+/// A wrapper around libc::realloc, aborting on out-of-memory
+#[inline]
+pub unsafe fn realloc_raw(ptr: *mut u8, size: uint) -> *mut u8 {
+    // `realloc(ptr, 0)` may allocate, but it may also return a null pointer
+    // http://pubs.opengroup.org/onlinepubs/9699919799/functions/realloc.html
+    if size == 0 {
+        free(ptr as *mut c_void);
+        mut_null()
+    } else {
+        let p = realloc(ptr as *mut c_void, size as size_t);
+        if p.is_null() {
+            // we need a non-allocating way to print an error here
+            abort();
+        }
+        p as *mut u8
+    }
+}