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#![unstable(issue = "32838", feature = "allocator_api")]
pub use alloc::heap::{Heap, Alloc, Layout, Excess, CannotReallocInPlace, AllocErr};
pub use alloc_system::System;
#[cfg(not(test))]
#[doc(hidden)]
#[allow(unused_attributes)]
pub mod __default_lib_allocator {
use super::{System, Layout, Alloc, AllocErr};
use ptr;
#[no_mangle]
#[rustc_std_internal_symbol]
pub unsafe extern fn __rdl_alloc(size: usize,
align: usize,
err: *mut u8) -> *mut u8 {
let layout = Layout::from_size_align_unchecked(size, align);
match System.alloc(layout) {
Ok(p) => p,
Err(e) => {
ptr::write(err as *mut AllocErr, e);
0 as *mut u8
}
}
}
#[no_mangle]
#[rustc_std_internal_symbol]
pub unsafe extern fn __rdl_oom(err: *const u8) -> ! {
System.oom((*(err as *const AllocErr)).clone())
}
#[no_mangle]
#[rustc_std_internal_symbol]
pub unsafe extern fn __rdl_dealloc(ptr: *mut u8,
size: usize,
align: usize) {
System.dealloc(ptr, Layout::from_size_align_unchecked(size, align))
}
#[no_mangle]
#[rustc_std_internal_symbol]
pub unsafe extern fn __rdl_usable_size(layout: *const u8,
min: *mut usize,
max: *mut usize) {
let pair = System.usable_size(&*(layout as *const Layout));
*min = pair.0;
*max = pair.1;
}
#[no_mangle]
#[rustc_std_internal_symbol]
pub unsafe extern fn __rdl_realloc(ptr: *mut u8,
old_size: usize,
old_align: usize,
new_size: usize,
new_align: usize,
err: *mut u8) -> *mut u8 {
let old_layout = Layout::from_size_align_unchecked(old_size, old_align);
let new_layout = Layout::from_size_align_unchecked(new_size, new_align);
match System.realloc(ptr, old_layout, new_layout) {
Ok(p) => p,
Err(e) => {
ptr::write(err as *mut AllocErr, e);
0 as *mut u8
}
}
}
#[no_mangle]
#[rustc_std_internal_symbol]
pub unsafe extern fn __rdl_alloc_zeroed(size: usize,
align: usize,
err: *mut u8) -> *mut u8 {
let layout = Layout::from_size_align_unchecked(size, align);
match System.alloc_zeroed(layout) {
Ok(p) => p,
Err(e) => {
ptr::write(err as *mut AllocErr, e);
0 as *mut u8
}
}
}
#[no_mangle]
#[rustc_std_internal_symbol]
pub unsafe extern fn __rdl_alloc_excess(size: usize,
align: usize,
excess: *mut usize,
err: *mut u8) -> *mut u8 {
let layout = Layout::from_size_align_unchecked(size, align);
match System.alloc_excess(layout) {
Ok(p) => {
*excess = p.1;
p.0
}
Err(e) => {
ptr::write(err as *mut AllocErr, e);
0 as *mut u8
}
}
}
#[no_mangle]
#[rustc_std_internal_symbol]
pub unsafe extern fn __rdl_realloc_excess(ptr: *mut u8,
old_size: usize,
old_align: usize,
new_size: usize,
new_align: usize,
excess: *mut usize,
err: *mut u8) -> *mut u8 {
let old_layout = Layout::from_size_align_unchecked(old_size, old_align);
let new_layout = Layout::from_size_align_unchecked(new_size, new_align);
match System.realloc_excess(ptr, old_layout, new_layout) {
Ok(p) => {
*excess = p.1;
p.0
}
Err(e) => {
ptr::write(err as *mut AllocErr, e);
0 as *mut u8
}
}
}
#[no_mangle]
#[rustc_std_internal_symbol]
pub unsafe extern fn __rdl_grow_in_place(ptr: *mut u8,
old_size: usize,
old_align: usize,
new_size: usize,
new_align: usize) -> u8 {
let old_layout = Layout::from_size_align_unchecked(old_size, old_align);
let new_layout = Layout::from_size_align_unchecked(new_size, new_align);
match System.grow_in_place(ptr, old_layout, new_layout) {
Ok(()) => 1,
Err(_) => 0,
}
}
#[no_mangle]
#[rustc_std_internal_symbol]
pub unsafe extern fn __rdl_shrink_in_place(ptr: *mut u8,
old_size: usize,
old_align: usize,
new_size: usize,
new_align: usize) -> u8 {
let old_layout = Layout::from_size_align_unchecked(old_size, old_align);
let new_layout = Layout::from_size_align_unchecked(new_size, new_align);
match System.shrink_in_place(ptr, old_layout, new_layout) {
Ok(()) => 1,
Err(_) => 0,
}
}
}