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-rw-r--r--mem/framer.h39
1 files changed, 39 insertions, 0 deletions
diff --git a/mem/framer.h b/mem/framer.h
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+++ b/mem/framer.h
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+#ifndef MEM_FRAMER_H
+#define MEM_FRAMER_H
+
+#include <rt.h>
+
+#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