forked from M-Labs/libfringe
rearrange the os::{Stack, StackSource} code a little
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parent
8dd3044da5
commit
2c3a203f57
38
src/os.rs
38
src/os.rs
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@ -6,6 +6,8 @@ use stack;
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#[cfg(unix)]
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#[path = "os/unix.rs"] mod sys;
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pub struct StackSource;
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#[allow(raw_pointer_derive)]
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#[derive(Debug)]
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pub struct Stack {
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@ -13,33 +15,11 @@ pub struct Stack {
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len: usize
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}
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pub struct StackSource;
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impl stack::StackSource for StackSource {
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type Output = Stack;
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type Error = IoError;
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fn get_stack(size: usize) -> Result<Stack, IoError> {
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Stack::new(size)
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}
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}
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impl stack::Stack for Stack {
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fn top(&mut self) -> *mut u8 {
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unsafe {
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self.ptr.offset(self.len as isize)
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}
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}
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fn limit(&self) -> *const u8 {
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unsafe {
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self.ptr.offset(sys::page_size() as isize)
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}
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}
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}
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impl Stack {
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fn new(size: usize) -> Result<Stack, IoError> {
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let page_size = sys::page_size();
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// round the page size up,
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@ -64,6 +44,20 @@ impl Stack {
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}
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}
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impl stack::Stack for Stack {
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fn top(&mut self) -> *mut u8 {
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unsafe {
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self.ptr.offset(self.len as isize)
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}
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}
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fn limit(&self) -> *const u8 {
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unsafe {
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self.ptr.offset(sys::page_size() as isize)
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}
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}
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}
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impl Drop for Stack {
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fn drop(&mut self) {
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unsafe {
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