From ef805e9373fd946bf1fe667bf18a54dfed6d1045 Mon Sep 17 00:00:00 2001 From: Alejandro Sior Date: Sat, 23 Jul 2022 22:53:47 +0200 Subject: kernel: add basic modules: arch, mem, rt --- mem/framer.h | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 mem/framer.h (limited to 'mem/framer.h') diff --git a/mem/framer.h b/mem/framer.h new file mode 100644 index 0000000..6d7034b --- /dev/null +++ b/mem/framer.h @@ -0,0 +1,39 @@ +#ifndef MEM_FRAMER_H +#define MEM_FRAMER_H + +#include + +#include "allocator.h" + +typedef struct mem_framer_freed { + struct mem_framer_freed *next; +} MemFramerFreed; + +/* Allocator for frames: aligned regions of memory of same size */ +typedef struct mem_framer { + MemAllocator allocator; + + /* The next frame to be given off to the caller + in case the freelist is empty */ + usize next; + + /* The end of the region covered by the memory allocator */ + usize end; + + /* The address of the last frame that has been added in + the freelist + NOTE: the freelist is a singly-linked list comprising + all frames that have been previously allocated + and then freed */ + MemFramerFreed *free; + + /* The size of a frame. This value also defines the alignment + that the frames must respect */ + uint blksz; +} MemFramer; + +MemFramer *mem_framer_install(void *addr, usize end, uint blksz); +void *mem_framer_alloc(MemAllocator *self, usize n); +void mem_framer_free(MemAllocator *self, void *ptr); + +#endif \ No newline at end of file -- cgit v1.2.3