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do not round-trip function pointer through integer

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This commit is contained in:
Ralf Jung 2022-04-07 14:58:02 -04:00
parent fe85591989
commit c599a4cfc3
1 changed files with 4 additions and 5 deletions
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9
library/std/src/sys/windows/compat.rs
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@ -92,11 +92,10 @@ macro_rules! compat_fn {
let symbol_name: *const u8 = concat!(stringify!($symbol), "\0").as_ptr();
let module_handle = $crate::sys::c::GetModuleHandleA(module_name as *const i8);
if !module_handle.is_null() {
match $crate::sys::c::GetProcAddress(module_handle, symbol_name as *const i8).addr() {
0 => {}
n => {
return Some(mem::transmute::<usize, F>(n));
}
let ptr = $crate::sys::c::GetProcAddress(module_handle, symbol_name as *const i8);
if !ptr.is_null() {
// Transmute to the right function pointer type.
return Some(mem::transmute(ptr));
}
}
return None;