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体验新版 GitCode,发现更多精彩内容 >>
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e07f57c5
编写于
4月 03, 2020
作者:
M
Mazdak Farrokhzad
提交者:
GitHub
4月 03, 2020
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差异文件
Rollup merge of #70691 - TimDiekmann:allocref-docs, r=RalfJung
Improve docs in `AllocRef` r? @RalfJung
上级
4cba69e5
0b612399
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
7 addition
and
5 deletion
+7
-5
src/libcore/alloc/mod.rs
src/libcore/alloc/mod.rs
+7
-5
未找到文件。
src/libcore/alloc/mod.rs
浏览文件 @
e07f57c5
...
@@ -33,9 +33,7 @@ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
...
@@ -33,9 +33,7 @@ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
#[derive(Debug,
Copy,
Clone,
PartialEq,
Eq)]
#[derive(Debug,
Copy,
Clone,
PartialEq,
Eq)]
#[unstable(feature
=
"allocator_api"
,
issue
=
"32838"
)]
#[unstable(feature
=
"allocator_api"
,
issue
=
"32838"
)]
pub
enum
AllocInit
{
pub
enum
AllocInit
{
/// The contents of the new memory are undefined.
/// The contents of the new memory are uninitialized.
///
/// Reading uninitialized memory is Undefined Behavior; it must be initialized before use.
Uninitialized
,
Uninitialized
,
/// The new memory is guaranteed to be zeroed.
/// The new memory is guaranteed to be zeroed.
Zeroed
,
Zeroed
,
...
@@ -196,7 +194,11 @@ pub unsafe trait AllocRef {
...
@@ -196,7 +194,11 @@ pub unsafe trait AllocRef {
///
///
/// # Safety
/// # Safety
///
///
/// `memory` must be a memory block returned by this allocator.
/// * `ptr` must be [*currently allocated*] via this allocator, and
/// * `layout` must [*fit*] the `ptr`.
///
/// [*currently allocated*]: #currently-allocated-memory
/// [*fit*]: #memory-fitting
unsafe
fn
dealloc
(
&
mut
self
,
ptr
:
NonNull
<
u8
>
,
layout
:
Layout
);
unsafe
fn
dealloc
(
&
mut
self
,
ptr
:
NonNull
<
u8
>
,
layout
:
Layout
);
/// Attempts to extend the memory block.
/// Attempts to extend the memory block.
...
@@ -237,7 +239,7 @@ pub unsafe trait AllocRef {
...
@@ -237,7 +239,7 @@ pub unsafe trait AllocRef {
// * `new_size must be strictly greater than `memory.size` or both are zero
// * `new_size must be strictly greater than `memory.size` or both are zero
/// * `new_size` must be greater than or equal to `layout.size()`
/// * `new_size` must be greater than or equal to `layout.size()`
/// * `new_size`, when rounded up to the nearest multiple of `layout.align()`, must not overflow
/// * `new_size`, when rounded up to the nearest multiple of `layout.align()`, must not overflow
/// (i.e., the rounded value must be less than `usize::MAX`).
/// (i.e., the rounded value must be less than
or equal to
`usize::MAX`).
///
///
/// [*currently allocated*]: #currently-allocated-memory
/// [*currently allocated*]: #currently-allocated-memory
/// [*fit*]: #memory-fitting
/// [*fit*]: #memory-fitting
...
...
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