From f1952f0996f0586abe1d987e35e594c2b9cce31e Mon Sep 17 00:00:00 2001
From: Eric Andersen <andersen@codepoet.org>
Date: Tue, 18 Jun 2002 09:19:10 +0000
Subject: Rework, reduce the size, add proper locking  -Erik

---
 libc/stdlib/malloc-930716/malloc.h | 63 ++++++--------------------------------
 1 file changed, 9 insertions(+), 54 deletions(-)

(limited to 'libc/stdlib/malloc-930716/malloc.h')

diff --git a/libc/stdlib/malloc-930716/malloc.h b/libc/stdlib/malloc-930716/malloc.h
index 34458c062..fc21a13cc 100644
--- a/libc/stdlib/malloc-930716/malloc.h
+++ b/libc/stdlib/malloc-930716/malloc.h
@@ -10,23 +10,13 @@
 
 #include <sys/cdefs.h>
 
-/* Underlying allocation function; successive calls should return
-   contiguous pieces of memory. */
-extern void *(*__morecore)(long);
-
-/* Default value of previous. */
-extern void *__default_morecore_init(long);
-extern void *__default_morecore(long);
-
 /* The allocator divides the heap into blocks of fixed size; large
    requests receive one or more whole blocks, and small requests
    receive a fragment of a block.  Fragment sizes are powers of two,
    and all fragments of a block are the same size.  When all the
    fragments in a block have been freed, the block itself is freed.
-   WARNING: BLOCKSIZE must be set greater than or equal to the
-   machine's page size for valloc() to work correctly.  The default
-   definition here is 4096 bytes. */
-#define INT_BIT (CHAR_BIT * sizeof (int))
+   */
+#define INT_BIT (CHAR_BIT * sizeof (size_t))
 #define BLOCKLOG (INT_BIT > 16 ? 12 : 9)
 #define BLOCKSIZE (1 << BLOCKLOG)
 #define BLOCKIFY(SIZE) (((SIZE) + BLOCKSIZE - 1) / BLOCKSIZE)
@@ -42,66 +32,31 @@ extern void *__default_morecore(long);
 /* Data structure giving per-block information. */
 union info {
     struct {
-	int type;		/* Zero for a large block, or positive
+	size_t type;		/* Zero for a large block, or positive
 				   giving the logarithm to the base two
 				   of the fragment size. */
 	union {
 	    struct {
-		int nfree;	/* Free fragments in a fragmented block. */
-		int first;	/* First free fragment of the block. */
+		size_t nfree;	/* Free fragments in a fragmented block. */
+		size_t first;	/* First free fragment of the block. */
 	    } frag;
-	    int size;		/* Size (in blocks) of a large cluster. */
+	    size_t size;	/* Size (in blocks) of a large cluster. */
 	} info;
     } busy;
     struct {
-	int size;		/* Size (in blocks) of a free cluster. */
-	int next;		/* Index of next free cluster. */
-	int prev;		/* Index of previous free cluster. */
+	size_t size;		/* Size (in blocks) of a free cluster. */
+	size_t next;		/* Index of next free cluster. */
+	size_t prev;		/* Index of previous free cluster. */
     } free;
 };
 
-/* Pointer to first block of the heap. */
-extern char *_heapbase;
-
-/* Table indexed by block number giving per-block information. */
-extern union info *_heapinfo;
-
 /* Address to block number and vice versa. */
 #define BLOCK(A) (((char *) (A) - _heapbase) / BLOCKSIZE + 1)
 #define ADDRESS(B) ((void *) (((B) - 1) * BLOCKSIZE + _heapbase))
 
-/* Current search index for the heap table. */
-extern int _heapindex;
-
-/* Limit of valid info table indices. */
-extern int _heaplimit;
-
 /* Doubly linked lists of free fragments. */
 struct list {
     struct list *next;
     struct list *prev;
 };
 
-/* Count of blocks for each fragment size. */
-extern int _fragblocks[];
-
-/* Free list headers for each fragment size. */
-extern struct list _fraghead[];
-
-/* List of blocks allocated with `memalign' (or `valloc').  */
-struct alignlist
-{ 
-  struct alignlist *next;
-  __ptr_t aligned;	/* The address that memaligned returned.  */
-  __ptr_t exact;	/* The address that malloc returned.  */
-};
-extern struct alignlist *_aligned_blocks;
-
-extern void _free_internal __P ((__ptr_t __ptr));
-
-extern void free (void *);
-extern void * malloc (size_t);
-extern void * calloc (size_t, size_t);
-extern void * valloc (size_t);
-extern void * memalign (size_t, size_t);
-extern void * realloc (void *, size_t);
-- 
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