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authorMatthew Sotoudeh <matthew@masot.net>2024-05-16 15:15:40 -0700
committerMatthew Sotoudeh <matthew@masot.net>2024-05-16 15:15:40 -0700
commit92996a3671732b6c883b325414a1e313786d48d6 (patch)
tree94b29907c5e167ca44ebd8e232ba9e3f44a7e58a /magic_buddy/buddy.h
parent54c09d54c0c170f1369751f8bf5a8a0b771a167c (diff)
checker
Diffstat (limited to 'magic_buddy/buddy.h')
-rw-r--r--magic_buddy/buddy.h55
1 files changed, 0 insertions, 55 deletions
diff --git a/magic_buddy/buddy.h b/magic_buddy/buddy.h
deleted file mode 100644
index c8778d6..0000000
--- a/magic_buddy/buddy.h
+++ /dev/null
@@ -1,55 +0,0 @@
-#pragma once
-#include <stdint.h>
-#include <stddef.h>
-
-#define MAGIC_COOKIE_BYTES 32
-#define ADDRESS_BITS (8 * sizeof(void*))
-
-struct buddy {
- uint8_t magic[MAGIC_COOKIE_BYTES];
- struct free_block *(avail[ADDRESS_BITS]);
- size_t root_logsize;
- void *base;
-};
-
-// Initialize a buddy with (constant) global state stored in @state.
-// NOTE: after initializing the buddy, you should always pass the exact same
-// pointer in for @state in future calls. If you need to move @state, use
-// move_buddy(...).
-void init_buddy(uint8_t *base, size_t size, uint8_t magic[MAGIC_COOKIE_BYTES],
- struct buddy *state);
-
-// Allocate a block of size >= @size
-void *allocate(size_t size, struct buddy *state);
-
-// Liberate a block of size @size starting at @base.
-void liberate(void *base, size_t size, struct buddy *state);
-
-// Print debug information for the allocator.
-void debug_buddy(struct buddy *state);
-
-// Simulates @new = allocate, memcpy(@new, @old), free(@old), with some
-// optimizations for cases where the reallocation can be done in place.
-void *reallocate(void *old, size_t old_size, size_t new_size,
- struct buddy *state);
-
-// Attempts to reserve a range [@start,@start+@size).
-// Returns 1 if success, 0 otherwise.
-// Whenever possible, we avoid writing anything into the reserved region.
-int reserve(void *start, size_t size, struct buddy *state);
-
-// Update @state to assume the memory pool has been copied to
-// [@new_base,@new_base+@new_size)
-// Can *ONLY* be used when @new_size >= the existing size.
-void grow_buddy(uint8_t *new_base, size_t new_size, struct buddy *state);
-
-// Update @state to only use the subset of the pool in range
-// [@state->base,@state->base+new_size)
-// Can *ONLY* be used when @new_size <= the existing size.
-// This *CAN* write to anything in the old pool.
-// This *CAN* fail, in which case everything is unmodified and 0 is returned.
-// Upon success, 1 is returned.
-int shrink_buddy(size_t new_size, struct buddy *state);
-
-// Used to move the global state of the buddy.
-void move_buddy(struct buddy *new_state, struct buddy *old_state);
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