parent
6284a22caa
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10
Cargo.toml
10
Cargo.toml
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@ -3,6 +3,10 @@ authors = ["edef <edef@edef.eu>"]
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name = "fringe"
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version = "0.0.1"
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[dependencies.kernel32-sys]
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optional = true
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version = "0.2.2"
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[dependencies.libc]
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optional = true
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version = "0.1.6"
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@ -16,6 +20,10 @@ rev = "9ef793e9549aabfd2d969615180b69d29ce28d88"
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default-features = false
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version = "1"
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[dependencies.winapi]
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optional = true
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version = "0.2.6"
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[features]
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default = ["os", "valgrind"]
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os = ["libc"]
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os = ["libc", "kernel32-sys", "winapi"]
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@ -10,6 +10,10 @@ use self::imp::sys_page_size;
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#[path = "unix.rs"]
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mod imp;
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#[cfg(windows)]
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#[path = "windows.rs"]
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mod imp;
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static PAGE_SIZE_CACHE: AtomicUsize = ATOMIC_USIZE_INIT;
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pub fn page_size() -> usize {
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match PAGE_SIZE_CACHE.load(Ordering::Relaxed) {
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@ -0,0 +1,37 @@
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// This file is part of libfringe, a low-level green threading library.
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// Copyright (c) edef <edef@edef.eu>
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// See the LICENSE file included in this distribution.
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extern crate winapi;
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extern crate kernel32;
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use core::{mem, ptr};
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use self::winapi::basetsd::SIZE_T;
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use self::winapi::minwindef::{DWORD, LPVOID};
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use self::winapi::winnt::{MEM_COMMIT, MEM_RESERVE, MEM_RELEASE, PAGE_READWRITE, PAGE_NOACCESS};
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use super::page_size;
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#[cfg(windows)]
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pub fn sys_page_size() -> usize {
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unsafe {
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let mut info = mem::zeroed();
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kernel32::GetSystemInfo(&mut info);
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info.dwPageSize as usize
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}
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}
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pub unsafe fn map_stack(len: usize) -> Option<*mut u8> {
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let ptr = kernel32::VirtualAlloc(ptr::null_mut(), len as SIZE_T, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
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if ptr == ptr::null_mut() {
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None
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} else {
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Some(ptr as *mut u8)
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}
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}
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pub unsafe fn protect_stack(ptr: *mut u8) -> bool {
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let mut old_prot: DWORD = 0;
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kernel32::VirtualProtect(ptr as LPVOID, page_size() as SIZE_T, PAGE_NOACCESS, &mut old_prot) != 0
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}
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pub unsafe fn unmap_stack(ptr: *mut u8, _len: usize) -> bool {
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kernel32::VirtualFree(ptr as LPVOID, 0, MEM_RELEASE) != 0
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}
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