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//! # Allocate crate
//!
//! Provides the Global allocator and methods
//! to create special purpose allocators.
use super::types::*;
use crate::sync::interface::Mutex;
use crate::sync::NullLock;
use crate::serial_vprintln;
use alloc::alloc::{GlobalAlloc, Layout};
use os_pic::init_lifo_queue;
use os_pic::util::lifo_queue::LifoQueue;
use os_pic::util::node::Node;
use os_pic::util::queue::Queue;
/// # Grand Allocator
///
/// The structure that uses different sized pools and allocates memory chunks
pub struct GrandAllocator {}
/// # The number of elements of each size
const GRAND_ALLOC_SIZE: usize = 64;
init_lifo_queue!(U8_GRAND_ALLOC, GRAND_ALLOC_SIZE, 0, u8);
init_lifo_queue!(U16_GRAND_ALLOC, GRAND_ALLOC_SIZE, 0, u16);
init_lifo_queue!(U32_GRAND_ALLOC, GRAND_ALLOC_SIZE, 0, u32);
init_lifo_queue!(U64_GRAND_ALLOC, GRAND_ALLOC_SIZE, 0, u64);
init_lifo_queue!(U128_GRAND_ALLOC, GRAND_ALLOC_SIZE, 0, u128);
init_lifo_queue!(U256_GRAND_ALLOC, GRAND_ALLOC_SIZE, { U256::new() }, U256);
init_lifo_queue!(U512_GRAND_ALLOC, GRAND_ALLOC_SIZE, { U512::new() }, U512);
init_lifo_queue!(U1024_GRAND_ALLOC, GRAND_ALLOC_SIZE, { U1024::new() }, U1024);
init_lifo_queue!(U2048_GRAND_ALLOC, GRAND_ALLOC_SIZE, { U2048::new() }, U2048);
init_lifo_queue!(U4096_GRAND_ALLOC, GRAND_ALLOC_SIZE, { U4096::new() }, U4096);
impl GrandAllocator {
pub fn init(&self) -> Result<(), &'static str> {
serial_vprintln!("GA: \x1b[93mInit U8 Pool\x1b[0m");
U8_GRAND_ALLOC.init();
serial_vprintln!("GA: \x1b[93mInit U16 Pool\x1b[0m");
U16_GRAND_ALLOC.init();
serial_vprintln!("GA: \x1b[93mInit U32 Pool\x1b[0m");
U32_GRAND_ALLOC.init();
serial_vprintln!("GA: \x1b[93mInit U64 Pool\x1b[0m");
U64_GRAND_ALLOC.init();
serial_vprintln!("GA: \x1b[93mInit U128 Pool\x1b[0m");
U128_GRAND_ALLOC.init();
serial_vprintln!("GA: \x1b[93mInit U256 Pool\x1b[0m");
U256_GRAND_ALLOC.init();
serial_vprintln!("GA: \x1b[93mInit U512 Pool\x1b[0m");
U512_GRAND_ALLOC.init();
serial_vprintln!("GA: \x1b[93mInit U1024 Pool\x1b[0m");
U1024_GRAND_ALLOC.init();
serial_vprintln!("GA: \x1b[93mInit U2048 Pool\x1b[0m");
U2048_GRAND_ALLOC.init();
serial_vprintln!("GA: \x1b[93mInit U4096 Pool\x1b[0m");
U4096_GRAND_ALLOC.init();
serial_vprintln!("GA: \x1b[94mPools Initialized!\x1b[0m");
Ok(())
}
}
unsafe impl GlobalAlloc for GrandAllocator {
/// # Allocator
///
/// Allocate the fixed size chunks
unsafe fn alloc(&self, layout: Layout) -> *mut u8 {
serial_vprintln!("GA: Allocating chunk of size {}!", layout.size());
match layout.size() {
1 => match U8_GRAND_ALLOC.pop() {
None => {
panic!("No cells to allocate!");
}
Some(elem) => {
return (*elem).ptr();
}
},
2 => match U16_GRAND_ALLOC.pop() {
None => {
panic!("No cells to allocate!");
}
Some(elem) => {
return (*elem).ptr();
}
},
3..=4 => match U32_GRAND_ALLOC.pop() {
None => {
panic!("No cells to allocate!");
}
Some(elem) => {
return (*elem).ptr();
}
},
5..=8 => match U64_GRAND_ALLOC.pop() {
None => {
panic!("No cells to allocate!");
}
Some(elem) => {
return (*elem).ptr();
}
},
9..=16 => match U128_GRAND_ALLOC.pop() {
None => {
panic!("No cells to allocate!");
}
Some(elem) => {
return (*elem).ptr();
}
},
17..=32 => match U256_GRAND_ALLOC.pop() {
None => {
panic!("No cells to allocate!");
}
Some(elem) => {
return (*elem).ptr();
}
},
33..=64 => match U512_GRAND_ALLOC.pop() {
None => {
panic!("No cells to allocate!");
}
Some(elem) => {
return (*elem).ptr();
}
},
65..=128 => match U1024_GRAND_ALLOC.pop() {
None => {
panic!("No cells to allocate!");
}
Some(elem) => {
return (*elem).ptr();
}
},
129..=256 => match U2048_GRAND_ALLOC.pop() {
None => {
panic!("No cells to allocate!");
}
Some(elem) => {
return (*elem).ptr();
}
},
257..=512 => match U4096_GRAND_ALLOC.pop() {
None => {
panic!("No cells to allocate!");
}
Some(elem) => {
return (*elem).ptr();
}
},
_ => {
panic!("No allocators for size {}!", layout.size());
}
}
}
/// # Deallocate
///
/// Deallocate the fixed size chunks by searching for them
unsafe fn dealloc(&self, ptr: *mut u8, layout: Layout) {
serial_vprintln!("GA: Deallocating chunk of size {}!", layout.size());
match layout.size() {
1 => {
U8_GRAND_ALLOC.inner.lock(|pool| {
let spacing: usize = (pool[2].ptr() as usize) - (pool[1].ptr() as usize);
let diff: usize = (ptr as usize) - (pool[1].ptr() as usize);
let index: usize = diff/spacing;
assert!(index < GRAND_ALLOC_SIZE, "{} is out of the allocation bounds ({})", index, GRAND_ALLOC_SIZE);
assert_eq!(diff % spacing, 0, "{} is not aligned with the spacings and so it must not have been allocated by the Grand Allocator", diff % spacing);
U8_GRAND_ALLOC.push(&mut pool[index+1]);
serial_vprintln!("GA: Freeing ({}, {}, {})", index, diff, spacing);
});
}
2 => {
U16_GRAND_ALLOC.inner.lock(|pool| {
let spacing: usize = (pool[2].ptr() as usize) - (pool[1].ptr() as usize);
let diff: usize = (ptr as usize) - (pool[1].ptr() as usize);
let index: usize = diff/spacing;
assert!(index < GRAND_ALLOC_SIZE, "{} is out of the allocation bounds ({})", index, GRAND_ALLOC_SIZE);
assert_eq!(diff % spacing, 0, "{} is not aligned with the spacings and so it must not have been allocated by the Grand Allocator", diff % spacing);
U16_GRAND_ALLOC.push(&mut pool[index+1]);
serial_vprintln!("GA: Freeing ({}, {}, {})", index, diff, spacing);
});
}
3..=4 => {
U32_GRAND_ALLOC.inner.lock(|pool| {
let spacing: usize = (pool[2].ptr() as usize) - (pool[1].ptr() as usize);
let diff: usize = (ptr as usize) - (pool[1].ptr() as usize);
let index: usize = diff/spacing;
assert!(index < GRAND_ALLOC_SIZE, "{} is out of the allocation bounds ({})", index, GRAND_ALLOC_SIZE);
assert_eq!(diff % spacing, 0, "{} is not aligned with the spacings and so it must not have been allocated by the Grand Allocator", diff % spacing);
U32_GRAND_ALLOC.push(&mut pool[index+1]);
serial_vprintln!("GA: Freeing ({}, {}, {})", index, diff, spacing);
});
}
5..=8 => {
U64_GRAND_ALLOC.inner.lock(|pool| {
let spacing: usize = (pool[2].ptr() as usize) - (pool[1].ptr() as usize);
let diff: usize = (ptr as usize) - (pool[1].ptr() as usize);
let index: usize = diff/spacing;
assert!(index < GRAND_ALLOC_SIZE, "{} is out of the allocation bounds ({})", index, GRAND_ALLOC_SIZE);
assert_eq!(diff % spacing, 0, "{} is not aligned with the spacings and so it must not have been allocated by the Grand Allocator", diff % spacing);
U64_GRAND_ALLOC.push(&mut pool[index+1]);
serial_vprintln!("GA: Freeing ({}, {}, {})", index, diff, spacing);
});
}
9..=16 => {
U128_GRAND_ALLOC.inner.lock(|pool| {
let spacing: usize = (pool[2].ptr() as usize) - (pool[1].ptr() as usize);
let diff: usize = (ptr as usize) - (pool[1].ptr() as usize);
let index: usize = diff/spacing;
assert!(index < GRAND_ALLOC_SIZE, "{} is out of the allocation bounds ({})", index, GRAND_ALLOC_SIZE);
assert_eq!(diff % spacing, 0, "{} is not aligned with the spacings and so it must not have been allocated by the Grand Allocator", diff % spacing);
U128_GRAND_ALLOC.push(&mut pool[index+1]);
serial_vprintln!("GA: Freeing ({}, {}, {})", index, diff, spacing);
});
}
17..=32 => {
U256_GRAND_ALLOC.inner.lock(|pool| {
let spacing: usize = (pool[2].ptr() as usize) - (pool[1].ptr() as usize);
let diff: usize = (ptr as usize) - (pool[1].ptr() as usize);
let index: usize = diff/spacing;
assert!(index < GRAND_ALLOC_SIZE, "{} is out of the allocation bounds ({})", index, GRAND_ALLOC_SIZE);
assert_eq!(diff % spacing, 0, "{} is not aligned with the spacings and so it must not have been allocated by the Grand Allocator", diff % spacing);
U256_GRAND_ALLOC.push(&mut pool[index+1]);
serial_vprintln!("GA: Freeing ({}, {}, {})", index, diff, spacing);
});
}
33..=64 => {
U512_GRAND_ALLOC.inner.lock(|pool| {
let spacing: usize = (pool[2].ptr() as usize) - (pool[1].ptr() as usize);
let diff: usize = (ptr as usize) - (pool[1].ptr() as usize);
let index: usize = diff/spacing;
assert!(index < GRAND_ALLOC_SIZE, "{} is out of the allocation bounds ({})", index, GRAND_ALLOC_SIZE);
assert_eq!(diff % spacing, 0, "{} is not aligned with the spacings and so it must not have been allocated by the Grand Allocator", diff % spacing);
U512_GRAND_ALLOC.push(&mut pool[index+1]);
serial_vprintln!("GA: Freeing ({}, {}, {})", index, diff, spacing);
});
}
65..=128 => {
U1024_GRAND_ALLOC.inner.lock(|pool| {
let spacing: usize = (pool[2].ptr() as usize) - (pool[1].ptr() as usize);
let diff: usize = (ptr as usize) - (pool[1].ptr() as usize);
let index: usize = diff/spacing;
assert!(index < GRAND_ALLOC_SIZE, "{} is out of the allocation bounds ({})", index, GRAND_ALLOC_SIZE);
assert_eq!(diff % spacing, 0, "{} is not aligned with the spacings and so it must not have been allocated by the Grand Allocator", diff % spacing);
U1024_GRAND_ALLOC.push(&mut pool[index+1]);
serial_vprintln!("GA: Freeing ({}, {}, {})", index, diff, spacing);
});
}
129..=256 => {
U2048_GRAND_ALLOC.inner.lock(|pool| {
let spacing: usize = (pool[2].ptr() as usize) - (pool[1].ptr() as usize);
let diff: usize = (ptr as usize) - (pool[1].ptr() as usize);
let index: usize = diff/spacing;
assert!(index < GRAND_ALLOC_SIZE, "{} is out of the allocation bounds ({})", index, GRAND_ALLOC_SIZE);
assert_eq!(diff % spacing, 0, "{} is not aligned with the spacings and so it must not have been allocated by the Grand Allocator", diff % spacing);
U2048_GRAND_ALLOC.push(&mut pool[index+1]);
serial_vprintln!("GA: Freeing ({}, {}, {})", index, diff, spacing);
});
}
257..=512 => {
U4096_GRAND_ALLOC.inner.lock(|pool| {
let spacing: usize = (pool[2].ptr() as usize) - (pool[1].ptr() as usize);
let diff: usize = (ptr as usize) - (pool[1].ptr() as usize);
let index: usize = diff/spacing;
assert!(index < GRAND_ALLOC_SIZE, "{} is out of the allocation bounds ({})", index, GRAND_ALLOC_SIZE);
assert_eq!(diff % spacing, 0, "{} is not aligned with the spacings and so it must not have been allocated by the Grand Allocator", diff % spacing);
U4096_GRAND_ALLOC.push(&mut pool[index+1]);
serial_vprintln!("GA: Freeing ({}, {}, {})", index, diff, spacing);
});
}
_ => {
panic!("No deallocators for size {}!", layout.size());
}
}
}
}
/// # Grand Allocator
///
/// The allocator of allocators. It hands out fixed sized memory chunks.
#[global_allocator]
pub static ALLOCATOR: GrandAllocator = GrandAllocator {};
/// # Global Allocator
///
/// Returns a borrow for the Global Allocator
pub fn allocator() -> &'static crate::mem::alloc::GrandAllocator {
serial_vprintln!("AL: Getting global allocator!");
&crate::mem::alloc::ALLOCATOR
}
|
