71 lines
1.6 KiB
Rust
71 lines
1.6 KiB
Rust
#![no_std]
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extern crate libc;
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extern crate spin;
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use libc::c_void;
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use libc::free;
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use libc::malloc;
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use core::alloc::Layout;
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use core::alloc::GlobalAlloc;
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use core::sync::atomic::AtomicBool;
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use core::sync::atomic::Ordering;
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mod const_init;
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use const_init::ConstInit;
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static INTERNAL_ALLOCATION: AtomicBool = AtomicBool::new(false);
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pub struct QADAPTInternal {
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pub has_allocated: AtomicBool
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}
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pub struct QADAPT {
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internal: spin::Once<QADAPTInternal>
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}
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impl ConstInit for QADAPT {
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const INIT: QADAPT = QADAPT {
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internal: spin::Once::new()
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};
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}
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unsafe impl GlobalAlloc for QADAPT {
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unsafe fn alloc(&self, layout: Layout) -> *mut u8 {
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if !INTERNAL_ALLOCATION.load(Ordering::SeqCst) {
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self.internal().has_allocated.store(true, Ordering::SeqCst);
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}
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malloc(layout.size()) as *mut u8
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}
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unsafe fn dealloc(&self, ptr: *mut u8, _layout: Layout) {
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free(ptr as *mut c_void)
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}
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}
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impl QADAPT {
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pub const INIT: Self = <Self as ConstInit>::INIT;
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fn internal(&self) -> &QADAPTInternal {
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self.internal.call_once(|| {
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INTERNAL_ALLOCATION.store(true, Ordering::SeqCst);
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let q = QADAPTInternal {
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has_allocated: AtomicBool::new(false)
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};
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INTERNAL_ALLOCATION.store(false, Ordering::SeqCst);
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q
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})
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}
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pub fn clear_allocations(&self) {
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self.internal().has_allocated.store(false, Ordering::SeqCst);
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}
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pub fn has_allocated(&self) -> bool {
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self.internal().has_allocated.load(Ordering::SeqCst)
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}
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}
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