ring/
prefixed.rs

1macro_rules! prefixed_extern {
2    // Functions.
3    {
4        $(
5            $( #[$meta:meta] )*
6            $vis:vis fn $name:ident ( $( $arg_pat:ident : $arg_ty:ty ),* $(,)? )
7            $( -> $ret_ty:ty )?;
8        )+
9    } => {
10        extern "C" {
11            $(
12                prefixed_item! {
13                    link_name
14                    $name
15                    {
16                        $( #[$meta] )*
17                        $vis fn $name ( $( $arg_pat : $arg_ty ),* ) $( -> $ret_ty )?;
18                    }
19
20                }
21            )+
22        }
23    };
24
25    // A global variable.
26    {
27        $( #[$meta:meta] )*
28        $vis:vis static mut $name:ident: $typ:ty;
29    } => {
30        extern "C" {
31            prefixed_item! {
32                link_name
33                $name
34                {
35                    $( #[$meta] )*
36                    $vis static mut $name: $typ;
37                }
38            }
39        }
40    };
41}
42
43#[deprecated = "`#[export_name]` creates problems and we will stop doing it."]
44#[cfg(not(any(
45    target_arch = "aarch64",
46    target_arch = "arm",
47    target_arch = "x86",
48    target_arch = "x86_64"
49)))]
50macro_rules! prefixed_export {
51    // A function.
52    {
53        $( #[$meta:meta] )*
54        $vis:vis unsafe fn $name:ident ( $( $arg_pat:ident : $arg_ty:ty ),* $(,)? ) $body:block
55    } => {
56        prefixed_item! {
57            export_name
58            $name
59            {
60                $( #[$meta] )*
61                $vis unsafe fn $name ( $( $arg_pat : $arg_ty ),* ) $body
62            }
63        }
64    };
65}
66
67macro_rules! prefixed_item {
68    // Calculate the prefixed name in a separate layer of macro expansion
69    // because rustc won't currently accept a non-literal expression as
70    // the value for `#[link_name = value]`.
71    {
72        $attr:ident
73        $name:ident
74        { $( $item:tt )+ }
75    } => {
76        prefixed_item! {
77            $attr
78            { concat!(env!("RING_CORE_PREFIX"), stringify!($name)) }
79            { $( $item )+ }
80        }
81    };
82
83    // Output the item.
84    {
85        $attr:ident
86        { $prefixed_name:expr }
87        { $( $item:tt )+ }
88    } => {
89        #[$attr = $prefixed_name]
90        $( $item )+
91    };
92}
ring/prefixed.rs

ring/
prefixed.rs
