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implement with_size_protect (#163)

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* implement with_size_protect

* no more conditional compilation
This commit is contained in:
Mackenzie Clark 2019-02-08 10:32:20 -08:00 committed by Lachlan Sneff
parent 46ac4e9e1a
commit 351b4feeeb
1 changed files with 26 additions and 0 deletions
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26
lib/runtime-core/src/sys/windows/memory.rs
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@ -18,6 +18,32 @@ pub struct Memory {
} }
impl Memory { impl Memory {
pub fn with_size_protect(size: usize, protection: Protect) -> Result<Self, String> {
if size == 0 {
return Ok(Self {
ptr: ptr::null_mut(),
size: 0,
protection,
});
}
let size = round_up_to_page_size(size, page_size::get());
let protect = protection.to_protect_const();
let ptr = unsafe { VirtualAlloc(ptr::null_mut(), size, MEM_RESERVE, protect) };
if ptr.is_null() {
Err("unable to allocate memory".to_string())
} else {
Ok(Self {
ptr: ptr as *mut u8,
size,
protection,
})
}
}
pub fn with_size(size: usize) -> Result<Self, String> { pub fn with_size(size: usize) -> Result<Self, String> {
if size == 0 { if size == 0 {
return Ok(Self { return Ok(Self {