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052ca0e4e3
Introduce Smalloc::claim_region, which removes a sub-region from the free memory pool and transfers ownership to another allocator. The region is punched out of the memory list rather than being added to the reservation list.
libkernel
Architecture-independent kernel building blocks for operating systems.
libkernel provides the core abstractions that a kernel needs to manage memory,
processes, filesystems, and synchronisation, agnostic of the an underlying CPU
architecture. It is designed to run in a no_std environment and uses feature
gates to keep the dependency footprint minimal.
Feature gates
| Feature | Enables | Implies |
|---|---|---|
sync |
Synchronisation primitives (spinlock, mutex, rwlock…) | — |
alloc |
Memory allocators (buddy, slab) and collection types | sync |
paging |
Page tables, PTE helpers | alloc |
proc |
Process identity types (UID/GID, capabilities) | — |
fs |
VFS traits, path manipulation, block I/O | proc, sync |
proc_vm |
Process virtual-memory management (mmap, brk, CoW) | paging, fs |
kbuf |
Async-aware circular kernel buffers | sync |
all |
Everything above | all of the above |
Quick start
Add libkernel to your Cargo.toml with only the features you need:
[dependencies]
libkernel = { version = "0.1", features = ["sync", "proc"] }
The CpuOps trait
Most synchronisation and memory primitives are generic over a
CpuOps
implementation. This trait abstracts the handful of arch-specific operations
(core ID, interrupt masking, halt) that the portable code depends on.
License
Licensed under the MIT license. See LICENSE for details.