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
#![no_std]
use core::alloc::{GlobalAlloc, Layout};
pub struct EspIdfAllocator;
const MALLOC_CAP_8BIT: u32 = 4;
extern "C" {
fn heap_caps_malloc(size: usize, caps: u32) -> *mut core::ffi::c_void;
fn heap_caps_free(ptr: *mut core::ffi::c_void);
fn heap_caps_realloc(
ptr: *mut core::ffi::c_void,
size: usize,
caps: u32,
) -> *mut core::ffi::c_void;
}
unsafe impl GlobalAlloc for EspIdfAllocator {
unsafe fn alloc(&self, layout: Layout) -> *mut u8 {
heap_caps_malloc(layout.size(), MALLOC_CAP_8BIT) as *mut u8
}
unsafe fn dealloc(&self, ptr: *mut u8, _layout: Layout) {
heap_caps_free(ptr as *mut core::ffi::c_void)
}
unsafe fn realloc(&self, ptr: *mut u8, _layout: Layout, new_size: usize) -> *mut u8 {
heap_caps_realloc(ptr as *mut core::ffi::c_void, new_size, MALLOC_CAP_8BIT) as *mut u8
}
}