move malloc_impl.h from src/internal to src/malloc

this reflects that it is no longer intended for consumption outside of
the malloc implementation.

1 files changed, 43 insertions, 0 deletions

diff --git a/src/malloc/malloc_impl.h b/src/malloc/malloc_impl.h
new file mode 100644
index 00000000..2c61b3ff
--- /dev/null
+++ b/src/malloc/malloc_impl.h
@@ -0,0 +1,43 @@
+#ifndef MALLOC_IMPL_H
+#define MALLOC_IMPL_H
+
+#include <sys/mman.h>
+#include "dynlink.h"
+
+hidden void *__expand_heap(size_t *);
+
+hidden void *__memalign(size_t, size_t);
+
+struct chunk {
+	size_t psize, csize;
+	struct chunk *next, *prev;
+};
+
+struct bin {
+	volatile int lock[2];
+	struct chunk *head;
+	struct chunk *tail;
+};
+
+#define SIZE_ALIGN (4*sizeof(size_t))
+#define SIZE_MASK (-SIZE_ALIGN)
+#define OVERHEAD (2*sizeof(size_t))
+#define MMAP_THRESHOLD (0x1c00*SIZE_ALIGN)
+#define DONTCARE 16
+#define RECLAIM 163840
+
+#define CHUNK_SIZE(c) ((c)->csize & -2)
+#define CHUNK_PSIZE(c) ((c)->psize & -2)
+#define PREV_CHUNK(c) ((struct chunk *)((char *)(c) - CHUNK_PSIZE(c)))
+#define NEXT_CHUNK(c) ((struct chunk *)((char *)(c) + CHUNK_SIZE(c)))
+#define MEM_TO_CHUNK(p) (struct chunk *)((char *)(p) - OVERHEAD)
+#define CHUNK_TO_MEM(c) (void *)((char *)(c) + OVERHEAD)
+#define BIN_TO_CHUNK(i) (MEM_TO_CHUNK(&mal.bins[i].head))
+
+#define C_INUSE  ((size_t)1)
+
+#define IS_MMAPPED(c) !((c)->csize & (C_INUSE))
+
+hidden void __bin_chunk(struct chunk *);
+
+#endif