--- libmalloc/libmalloc-140.50.6/src/magazine_rack.c
+++ /dev/null
@@ -1,159 +0,0 @@
-/*
- * Copyright (c) 2016 Apple Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-
-#include "internal.h"
-
-void
-rack_init(rack_t *rack, rack_type_t type, uint32_t num_magazines, uint32_t debug_flags)
-{
-	rack->type = type;
-	rack->rg[0].nextgen = &rack->rg[1];
-	rack->rg[1].nextgen = &rack->rg[0];
-	rack->region_generation = &rack->rg[0];
-
-	rack->region_generation->hashed_regions = rack->initial_regions;
-	rack->region_generation->num_regions_allocated = INITIAL_NUM_REGIONS;
-	rack->region_generation->num_regions_allocated_shift = INITIAL_NUM_REGIONS_SHIFT;
-
-	memset(rack->initial_regions, '\0', sizeof(region_t) * INITIAL_NUM_REGIONS);
-
-	rack->cookie = (uintptr_t)malloc_entropy[0];
-
-	if (type == RACK_TYPE_SMALL) {
-		// Flip the cookie for SMALL regions so that tiny and small free list
-		// entries will trap when used if used in opposing region types.
-		rack->cookie = ~rack->cookie;
-	}
-
-	rack->debug_flags = debug_flags;
-	rack->num_magazines = num_magazines;
-	rack->num_regions = 0;
-	rack->num_regions_dealloc = 0;
-	rack->magazines = NULL;
-
-	if (num_magazines > 0) {
-		// num_magazines + 1, the [-1] index will become the depot magazine
-		size_t magsize = round_page_quanta(sizeof(magazine_t) * (num_magazines + 1));
-		magazine_t *magazines = mvm_allocate_pages(magsize, 0, MALLOC_ADD_GUARD_PAGES, VM_MEMORY_MALLOC);
-		if (!magazines) {
-			MALLOC_PRINTF_FATAL_ERROR(0, "unable to allocate magazine array");
-		}
-
-		rack->magazines = &magazines[1];
-		rack->num_magazines_mask_shift = 0;
-
-		// The magazines are indexed in [0 .. (num_magazines - 1)]
-		// Find the smallest power of 2 that exceeds (num_magazines - 1)
-		int i = 1;
-		while (i <= (num_magazines - 1)) {
-			rack->num_magazines_mask_shift++;
-			i <<= 1;
-		}
-
-		// Reduce i by 1 to obtain a mask covering [0 .. (num_tiny_magazines - 1)]
-		rack->num_magazines_mask = i - 1;
-		rack->last_madvise = 0;
-
-		_malloc_lock_init(&rack->region_lock);
-		_malloc_lock_init(&rack->magazines[DEPOT_MAGAZINE_INDEX].magazine_lock);
-
-		for (int i=0; i < rack->num_magazines; i++) {
-			_malloc_lock_init(&rack->magazines[i].magazine_lock);
-		}
-	}
-}
-
-void
-rack_destroy_regions(rack_t *rack, size_t region_size)
-{
-	/* destroy regions attached to this rack */
-	for (int i=0; i < rack->region_generation->num_regions_allocated; i++) {
-		if ((rack->region_generation->hashed_regions[i] != HASHRING_OPEN_ENTRY) &&
-			(rack->region_generation->hashed_regions[i] != HASHRING_REGION_DEALLOCATED))
-		{
-			mvm_deallocate_pages(rack->region_generation->hashed_regions[i], region_size, 0);
-			rack->region_generation->hashed_regions[i] = HASHRING_REGION_DEALLOCATED;
-		}
-	}
-}
-
-void
-rack_destroy(rack_t *rack)
-{
-	/* if the rack has additional regions, then deallocate them */
-	if (rack->region_generation->hashed_regions != rack->initial_regions) {
-		size_t size = round_page_quanta(rack->region_generation->num_regions_allocated * sizeof(region_t));
-		mvm_deallocate_pages(rack->region_generation->hashed_regions, size, 0);
-	}
-
-	if (rack->num_magazines > 0) {
-		size_t size = round_page_quanta(sizeof(magazine_t) * (rack->num_magazines + 1));
-		mvm_deallocate_pages(&rack->magazines[-1], size, MALLOC_ADD_GUARD_PAGES);
-		rack->magazines = NULL;
-	}
-}
-
-void
-rack_region_insert(rack_t *rack, region_t region)
-{
-	// Here find the only place in rackland that (infrequently) takes the tiny_regions_lock.
-	// Only one thread at a time should be permitted to assess the density of the hash
-	// ring and adjust if needed.
-	// Only one thread at a time should be permitted to insert its new region on
-	// the hash ring.
-	// It is safe for all other threads to read the hash ring (hashed_regions) and
-	// the associated sizes (num_regions_allocated and num_tiny_regions).
-
-	_malloc_lock_lock(&rack->region_lock);
-
-	// Check to see if the hash ring of tiny regions needs to grow.  Try to
-	// avoid the hash ring becoming too dense.
-	if (rack->region_generation->num_regions_allocated < (2 * rack->num_regions)) {
-		region_t *new_regions;
-		size_t new_size;
-		size_t new_shift = rack->region_generation->num_regions_allocated_shift; // In/Out parameter
-		new_regions = hash_regions_grow_no_lock(rack->region_generation->hashed_regions,
-												rack->region_generation->num_regions_allocated, &new_shift, &new_size);
-		// Do not deallocate the current hashed_regions allocation since someone may
-		// be iterating it.  Instead, just leak it.
-
-		// Prepare to advance to the "next generation" of the hash ring.
-		rack->region_generation->nextgen->hashed_regions = new_regions;
-		rack->region_generation->nextgen->num_regions_allocated = new_size;
-		rack->region_generation->nextgen->num_regions_allocated_shift = new_shift;
-
-		// Throw the switch to atomically advance to the next generation.
-		rack->region_generation = rack->region_generation->nextgen;
-		// Ensure everyone sees the advance.
-		OSMemoryBarrier();
-	}
-
-	// Insert the new region into the hash ring, and update malloc statistics
-	hash_region_insert_no_lock(rack->region_generation->hashed_regions,
-							   rack->region_generation->num_regions_allocated,
-							   rack->region_generation->num_regions_allocated_shift,
-							   region);
-
-	rack->num_regions++;
-	_malloc_lock_unlock(&rack->region_lock);
-}