alloc_cat 1.1.1

a simple allocator for small-to-tiny Wasm projects in rust
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44

use core::alloc::{GlobalAlloc, Layout};
use core::fmt;
use spin::Mutex;

use crate::{AllocatorStats, Statsable};


pub struct ThreadSafeAllocator<A: GlobalAlloc + Statsable + 'static> {
    pub inner: Mutex<&'static A>,
}

unsafe impl<A: GlobalAlloc + Statsable> Sync for ThreadSafeAllocator<A> {}

impl<A: fmt::Display + GlobalAlloc + Statsable> fmt::Display for ThreadSafeAllocator<A> {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "ThreadSafeAllocator({})", self.inner.lock())
    }
}

impl<A: GlobalAlloc + Statsable> ThreadSafeAllocator<A> {
    pub const fn new(inner: &'static A) -> ThreadSafeAllocator<A> {
        ThreadSafeAllocator { inner: Mutex::new(inner) }
    }
}

unsafe impl<A: GlobalAlloc + Statsable> GlobalAlloc for ThreadSafeAllocator<A> {
    unsafe fn alloc(&self, layout: Layout) -> *mut u8 {
        unsafe { self.inner.lock().alloc(layout) }
    }

    unsafe fn dealloc(&self, ptr: *mut u8, layout: Layout) {
        unsafe { self.inner.lock().dealloc(ptr, layout) }
    }
}

impl<A: GlobalAlloc + Statsable> Statsable for ThreadSafeAllocator<A> {
    fn get_stats(&self) -> AllocatorStats {
        self.inner.lock().get_stats()
    }

    fn reset_trip(&self) {
        self.inner.lock().reset_trip()
    }
}