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Last change on this file since 6dba8755 was 4cf617e, checked in by Peter A. Buhr <pabuhr@…>, 5 years ago
memalign - correct size to eliminate alignment offset
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File size: 49.7 KB

Rev	Line
[73abe95]	1	//
[c4f68dc]	2	// Cforall Version 1.0.0 Copyright (C) 2017 University of Waterloo
	3	//
	4	// The contents of this file are covered under the licence agreement in the
	5	// file "LICENCE" distributed with Cforall.
[73abe95]	6	//
	7	// heap.c --
	8	//
[c4f68dc]	9	// Author : Peter A. Buhr
	10	// Created On : Tue Dec 19 21:58:35 2017
	11	// Last Modified By : Peter A. Buhr
[4cf617e]	12	// Last Modified On : Mon Jul 27 23:16:18 2020
	13	// Update Count : 815
[73abe95]	14	//
[c4f68dc]	15
	16	#include <unistd.h> // sbrk, sysconf
	17	#include <stdbool.h> // true, false
	18	#include <stdio.h> // snprintf, fileno
	19	#include <errno.h> // errno
[1e034d9]	20	#include <string.h> // memset, memcpy
[1076d05]	21	#include <limits.h> // ULONG_MAX
[ada0246d]	22	#include <malloc.h> // memalign, malloc_usable_size
[c4f68dc]	23	#include <sys/mman.h> // mmap, munmap
	24
[bcb14b5]	25	#include "bits/align.hfa" // libPow2
	26	#include "bits/defs.hfa" // likely, unlikely
	27	#include "bits/locks.hfa" // __spinlock_t
[73abe95]	28	#include "startup.hfa" // STARTUP_PRIORITY_MEMORY
[1e034d9]	29	//#include "stdlib.hfa" // bsearchl
[1076d05]	30	#include "bitmanip.hfa" // ceiling
[c4f68dc]	31
[95eb7cf]	32	#define MIN(x, y) (y > x ? x : y)
[c4f68dc]	33
[93c2e0a]	34	static bool traceHeap = false;
[d46ed6e]	35
[baf608a]	36	inline bool traceHeap() { return traceHeap; }
[d46ed6e]	37
[93c2e0a]	38	bool traceHeapOn() {
	39	bool temp = traceHeap;
[d46ed6e]	40	traceHeap = true;
	41	return temp;
	42	} // traceHeapOn
	43
[93c2e0a]	44	bool traceHeapOff() {
	45	bool temp = traceHeap;
[d46ed6e]	46	traceHeap = false;
	47	return temp;
	48	} // traceHeapOff
	49
[baf608a]	50	bool traceHeapTerm() { return false; }
	51
[d46ed6e]	52
[95eb7cf]	53	static bool prtFree = false;
[d46ed6e]	54
[95eb7cf]	55	inline bool prtFree() {
	56	return prtFree;
	57	} // prtFree
[5d4fa18]	58
[95eb7cf]	59	bool prtFreeOn() {
	60	bool temp = prtFree;
	61	prtFree = true;
[5d4fa18]	62	return temp;
[95eb7cf]	63	} // prtFreeOn
[5d4fa18]	64
[95eb7cf]	65	bool prtFreeOff() {
	66	bool temp = prtFree;
	67	prtFree = false;
[5d4fa18]	68	return temp;
[95eb7cf]	69	} // prtFreeOff
[5d4fa18]	70
	71
[e723100]	72	enum {
[1e034d9]	73	// Define the default extension heap amount in units of bytes. When the uC++ supplied heap reaches the brk address,
	74	// the brk address is extended by the extension amount.
[e723100]	75	__CFA_DEFAULT_HEAP_EXPANSION__ = (1 * 1024 * 1024),
[1e034d9]	76
	77	// Define the mmap crossover point during allocation. Allocations less than this amount are allocated from buckets;
	78	// values greater than or equal to this value are mmap from the operating system.
	79	__CFA_DEFAULT_MMAP_START__ = (512 * 1024 + 1),
[e723100]	80	};
	81
	82	size_t default_heap_expansion() __attribute__(( weak )) {
	83	return __CFA_DEFAULT_HEAP_EXPANSION__;
	84	} // default_heap_expansion
	85
[1076d05]	86	size_t default_mmap_start() __attribute__(( weak )) {
	87	return __CFA_DEFAULT_MMAP_START__;
	88	} // default_mmap_start
	89
[e723100]	90
[f0b3f51]	91	#ifdef __CFA_DEBUG__
[93c2e0a]	92	static unsigned int allocFree; // running total of allocations minus frees
[d46ed6e]	93
[95eb7cf]	94	static void prtUnfreed() {
[b6830d74]	95	if ( allocFree != 0 ) {
[d46ed6e]	96	// DO NOT USE STREAMS AS THEY MAY BE UNAVAILABLE AT THIS POINT.
[4ea1c6d]	97	char helpText[512];
	98	int len = snprintf( helpText, sizeof(helpText), "CFA warning (UNIX pid:%ld) : program terminating with %u(0x%x) bytes of storage allocated but not freed.\n"
	99	"Possible cause is unfreed storage allocated by the program or system/library routines called from the program.\n",
	100	(long int)getpid(), allocFree, allocFree ); // always print the UNIX pid
	101	__cfaabi_bits_write( STDERR_FILENO, helpText, len ); // print debug/nodebug
[b6830d74]	102	} // if
[95eb7cf]	103	} // prtUnfreed
[d46ed6e]	104
	105	extern "C" {
[bcb14b5]	106	void heapAppStart() { // called by __cfaabi_appready_startup
	107	allocFree = 0;
	108	} // heapAppStart
	109
	110	void heapAppStop() { // called by __cfaabi_appready_startdown
	111	fclose( stdin ); fclose( stdout );
[95eb7cf]	112	prtUnfreed();
[bcb14b5]	113	} // heapAppStop
[d46ed6e]	114	} // extern "C"
	115	#endif // __CFA_DEBUG__
	116
[1e034d9]	117
[e723100]	118	// statically allocated variables => zero filled.
	119	static size_t pageSize; // architecture pagesize
	120	static size_t heapExpand; // sbrk advance
	121	static size_t mmapStart; // cross over point for mmap
	122	static unsigned int maxBucketsUsed; // maximum number of buckets in use
	123
	124
	125	#define SPINLOCK 0
	126	#define LOCKFREE 1
	127	#define BUCKETLOCK SPINLOCK
[9c438546]	128	#if BUCKETLOCK == SPINLOCK
	129	#elif BUCKETLOCK == LOCKFREE
	130	#include <stackLockFree.hfa>
	131	#else
	132	#error undefined lock type for bucket lock
[e723100]	133	#endif // LOCKFREE
	134
	135	// Recursive definitions: HeapManager needs size of bucket array and bucket area needs sizeof HeapManager storage.
	136	// Break recusion by hardcoding number of buckets and statically checking number is correct after bucket array defined.
[95eb7cf]	137	enum { NoBucketSizes = 91 }; // number of buckets sizes
[d46ed6e]	138
[c4f68dc]	139	struct HeapManager {
	140	struct Storage {
[bcb14b5]	141	struct Header { // header
[c4f68dc]	142	union Kind {
	143	struct RealHeader {
	144	union {
[bcb14b5]	145	struct { // 4-byte word => 8-byte header, 8-byte word => 16-byte header
[f0b3f51]	146	#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ && __SIZEOF_POINTER__ == 4
[9c438546]	147	uint64_t padding; // unused, force home/blocksize to overlay alignment in fake header
[bcb14b5]	148	#endif // __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ && __SIZEOF_POINTER__ == 4
[c4f68dc]	149
	150	union {
[9c438546]	151	// FreeHeader * home; // allocated block points back to home locations (must overlay alignment)
[cfbc703d]	152	// 2nd low-order bit => zero filled
[c4f68dc]	153	void * home; // allocated block points back to home locations (must overlay alignment)
	154	size_t blockSize; // size for munmap (must overlay alignment)
[9c438546]	155	#if BUCKETLOCK == SPINLOCK
[c4f68dc]	156	Storage * next; // freed block points next freed block of same size
	157	#endif // SPINLOCK
	158	};
[9c438546]	159	size_t size; // allocation size in bytes
[c4f68dc]	160
[f0b3f51]	161	#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ && __SIZEOF_POINTER__ == 4
[9c438546]	162	uint64_t padding; // unused, force home/blocksize to overlay alignment in fake header
[bcb14b5]	163	#endif // __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ && __SIZEOF_POINTER__ == 4
[c4f68dc]	164	};
[9c438546]	165	#if BUCKETLOCK == LOCKFREE
	166	Link(Storage) next; // freed block points next freed block of same size (double-wide)
[c4f68dc]	167	#endif // LOCKFREE
	168	};
[93c2e0a]	169	} real; // RealHeader
[9c438546]	170
[c4f68dc]	171	struct FakeHeader {
	172	#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
[9c438546]	173	uint32_t alignment; // 1st low-order bit => fake header & alignment
[f0b3f51]	174	#endif // __ORDER_LITTLE_ENDIAN__
[c4f68dc]	175
	176	uint32_t offset;
	177
	178	#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
	179	uint32_t alignment; // low-order bits of home/blockSize used for tricks
[f0b3f51]	180	#endif // __ORDER_BIG_ENDIAN__
[93c2e0a]	181	} fake; // FakeHeader
	182	} kind; // Kind
[bcb14b5]	183	} header; // Header
[95eb7cf]	184	char pad[libAlign() - sizeof( Header )];
[bcb14b5]	185	char data[0]; // storage
[c4f68dc]	186	}; // Storage
	187
[95eb7cf]	188	static_assert( libAlign() >= sizeof( Storage ), "libAlign() < sizeof( Storage )" );
[c4f68dc]	189
	190	struct FreeHeader {
[9c438546]	191	#if BUCKETLOCK == SPINLOCK
[bcb14b5]	192	__spinlock_t lock; // must be first field for alignment
	193	Storage * freeList;
[c4f68dc]	194	#else
[9c438546]	195	StackLF(Storage) freeList;
	196	#endif // BUCKETLOCK
[bcb14b5]	197	size_t blockSize; // size of allocations on this list
[c4f68dc]	198	}; // FreeHeader
	199
	200	// must be first fields for alignment
	201	__spinlock_t extlock; // protects allocation-buffer extension
	202	FreeHeader freeLists[NoBucketSizes]; // buckets for different allocation sizes
	203
	204	void * heapBegin; // start of heap
	205	void * heapEnd; // logical end of heap
	206	size_t heapRemaining; // amount of storage not allocated in the current chunk
	207	}; // HeapManager
	208
[9c438546]	209	#if BUCKETLOCK == LOCKFREE
[c45d2fa]	210	static inline {
[8b58bae]	211	Link(HeapManager.Storage) * ?`next( HeapManager.Storage * this ) { return &this->header.kind.real.next; }
[c45d2fa]	212	void ?{}( HeapManager.FreeHeader & ) {}
	213	void ^?{}( HeapManager.FreeHeader & ) {}
	214	} // distribution
[9c438546]	215	#endif // LOCKFREE
	216
[7b149bc]	217	static inline size_t getKey( const HeapManager.FreeHeader & freeheader ) { return freeheader.blockSize; }
[5d4fa18]	218
[e723100]	219
	220	#define FASTLOOKUP
	221	#define __STATISTICS__
[5d4fa18]	222
[1e034d9]	223	// Bucket size must be multiple of 16.
[5d4fa18]	224	// Powers of 2 are common allocation sizes, so make powers of 2 generate the minimum required size.
[e723100]	225	static const unsigned int bucketSizes[] @= { // different bucket sizes
[95eb7cf]	226	16, 32, 48, 64 + sizeof(HeapManager.Storage), // 4
	227	96, 112, 128 + sizeof(HeapManager.Storage), // 3
	228	160, 192, 224, 256 + sizeof(HeapManager.Storage), // 4
	229	320, 384, 448, 512 + sizeof(HeapManager.Storage), // 4
	230	640, 768, 896, 1_024 + sizeof(HeapManager.Storage), // 4
	231	1_536, 2_048 + sizeof(HeapManager.Storage), // 2
	232	2_560, 3_072, 3_584, 4_096 + sizeof(HeapManager.Storage), // 4
	233	6_144, 8_192 + sizeof(HeapManager.Storage), // 2
	234	9_216, 10_240, 11_264, 12_288, 13_312, 14_336, 15_360, 16_384 + sizeof(HeapManager.Storage), // 8
	235	18_432, 20_480, 22_528, 24_576, 26_624, 28_672, 30_720, 32_768 + sizeof(HeapManager.Storage), // 8
	236	36_864, 40_960, 45_056, 49_152, 53_248, 57_344, 61_440, 65_536 + sizeof(HeapManager.Storage), // 8
	237	73_728, 81_920, 90_112, 98_304, 106_496, 114_688, 122_880, 131_072 + sizeof(HeapManager.Storage), // 8
	238	147_456, 163_840, 180_224, 196_608, 212_992, 229_376, 245_760, 262_144 + sizeof(HeapManager.Storage), // 8
	239	294_912, 327_680, 360_448, 393_216, 425_984, 458_752, 491_520, 524_288 + sizeof(HeapManager.Storage), // 8
	240	655_360, 786_432, 917_504, 1_048_576 + sizeof(HeapManager.Storage), // 4
	241	1_179_648, 1_310_720, 1_441_792, 1_572_864, 1_703_936, 1_835_008, 1_966_080, 2_097_152 + sizeof(HeapManager.Storage), // 8
	242	2_621_440, 3_145_728, 3_670_016, 4_194_304 + sizeof(HeapManager.Storage), // 4
[5d4fa18]	243	};
[e723100]	244
	245	static_assert( NoBucketSizes == sizeof(bucketSizes) / sizeof(bucketSizes[0]), "size of bucket array wrong" );
	246
[5d4fa18]	247	#ifdef FASTLOOKUP
[a92a4fe]	248	enum { LookupSizes = 65_536 + sizeof(HeapManager.Storage) }; // number of fast lookup sizes
[5d4fa18]	249	static unsigned char lookup[LookupSizes]; // O(1) lookup for small sizes
	250	#endif // FASTLOOKUP
	251
[95eb7cf]	252	static int mmapFd = -1; // fake or actual fd for anonymous file
[5d4fa18]	253	#ifdef __CFA_DEBUG__
[93c2e0a]	254	static bool heapBoot = 0; // detect recursion during boot
[5d4fa18]	255	#endif // __CFA_DEBUG__
[9c438546]	256
	257	// The constructor for heapManager is called explicitly in memory_startup.
[5d4fa18]	258	static HeapManager heapManager __attribute__(( aligned (128) )) @= {}; // size of cache line to prevent false sharing
	259
[c4f68dc]	260
	261	#ifdef __STATISTICS__
[95eb7cf]	262	// Heap statistics counters.
	263	static unsigned long long int mmap_storage;
[c4f68dc]	264	static unsigned int mmap_calls;
	265	static unsigned long long int munmap_storage;
	266	static unsigned int munmap_calls;
	267	static unsigned long long int sbrk_storage;
	268	static unsigned int sbrk_calls;
	269	static unsigned long long int malloc_storage;
	270	static unsigned int malloc_calls;
	271	static unsigned long long int free_storage;
	272	static unsigned int free_calls;
[76e2113]	273	static unsigned long long int aalloc_storage;
	274	static unsigned int aalloc_calls;
[c4f68dc]	275	static unsigned long long int calloc_storage;
	276	static unsigned int calloc_calls;
	277	static unsigned long long int memalign_storage;
	278	static unsigned int memalign_calls;
[76e2113]	279	static unsigned long long int amemalign_storage;
	280	static unsigned int amemalign_calls;
[c4f68dc]	281	static unsigned long long int cmemalign_storage;
	282	static unsigned int cmemalign_calls;
[cfbc703d]	283	static unsigned long long int resize_storage;
	284	static unsigned int resize_calls;
[c4f68dc]	285	static unsigned long long int realloc_storage;
	286	static unsigned int realloc_calls;
[95eb7cf]	287	// Statistics file descriptor (changed by malloc_stats_fd).
	288	static int statfd = STDERR_FILENO; // default stderr
[c4f68dc]	289
	290	// Use "write" because streams may be shutdown when calls are made.
[d46ed6e]	291	static void printStats() {
[76e2113]	292	char helpText[1024];
[95eb7cf]	293	__cfaabi_bits_print_buffer( STDERR_FILENO, helpText, sizeof(helpText),
[bcb14b5]	294	"\nHeap statistics:\n"
	295	" malloc: calls %u / storage %llu\n"
[76e2113]	296	" aalloc: calls %u / storage %llu\n"
[bcb14b5]	297	" calloc: calls %u / storage %llu\n"
	298	" memalign: calls %u / storage %llu\n"
[76e2113]	299	" amemalign: calls %u / storage %llu\n"
[bcb14b5]	300	" cmemalign: calls %u / storage %llu\n"
[cfbc703d]	301	" resize: calls %u / storage %llu\n"
[bcb14b5]	302	" realloc: calls %u / storage %llu\n"
	303	" free: calls %u / storage %llu\n"
	304	" mmap: calls %u / storage %llu\n"
	305	" munmap: calls %u / storage %llu\n"
	306	" sbrk: calls %u / storage %llu\n",
	307	malloc_calls, malloc_storage,
[76e2113]	308	aalloc_calls, calloc_storage,
[bcb14b5]	309	calloc_calls, calloc_storage,
	310	memalign_calls, memalign_storage,
[76e2113]	311	amemalign_calls, amemalign_storage,
[bcb14b5]	312	cmemalign_calls, cmemalign_storage,
[cfbc703d]	313	resize_calls, resize_storage,
[bcb14b5]	314	realloc_calls, realloc_storage,
	315	free_calls, free_storage,
	316	mmap_calls, mmap_storage,
	317	munmap_calls, munmap_storage,
	318	sbrk_calls, sbrk_storage
[c4f68dc]	319	);
[d46ed6e]	320	} // printStats
[c4f68dc]	321
[bcb14b5]	322	static int printStatsXML( FILE * stream ) { // see malloc_info
[76e2113]	323	char helpText[1024];
[b6830d74]	324	int len = snprintf( helpText, sizeof(helpText),
[c4f68dc]	325	"<malloc version=\"1\">\n"
	326	"<heap nr=\"0\">\n"
	327	"<sizes>\n"
	328	"</sizes>\n"
	329	"<total type=\"malloc\" count=\"%u\" size=\"%llu\"/>\n"
[76e2113]	330	"<total type=\"aalloc\" count=\"%u\" size=\"%llu\"/>\n"
[c4f68dc]	331	"<total type=\"calloc\" count=\"%u\" size=\"%llu\"/>\n"
	332	"<total type=\"memalign\" count=\"%u\" size=\"%llu\"/>\n"
[76e2113]	333	"<total type=\"amemalign\" count=\"%u\" size=\"%llu\"/>\n"
[c4f68dc]	334	"<total type=\"cmemalign\" count=\"%u\" size=\"%llu\"/>\n"
[cfbc703d]	335	"<total type=\"resize\" count=\"%u\" size=\"%llu\"/>\n"
[c4f68dc]	336	"<total type=\"realloc\" count=\"%u\" size=\"%llu\"/>\n"
	337	"<total type=\"free\" count=\"%u\" size=\"%llu\"/>\n"
	338	"<total type=\"mmap\" count=\"%u\" size=\"%llu\"/>\n"
	339	"<total type=\"munmap\" count=\"%u\" size=\"%llu\"/>\n"
	340	"<total type=\"sbrk\" count=\"%u\" size=\"%llu\"/>\n"
	341	"</malloc>",
	342	malloc_calls, malloc_storage,
[76e2113]	343	aalloc_calls, aalloc_storage,
[c4f68dc]	344	calloc_calls, calloc_storage,
	345	memalign_calls, memalign_storage,
[76e2113]	346	amemalign_calls, amemalign_storage,
[c4f68dc]	347	cmemalign_calls, cmemalign_storage,
[cfbc703d]	348	resize_calls, resize_storage,
[c4f68dc]	349	realloc_calls, realloc_storage,
	350	free_calls, free_storage,
	351	mmap_calls, mmap_storage,
	352	munmap_calls, munmap_storage,
	353	sbrk_calls, sbrk_storage
	354	);
[95eb7cf]	355	__cfaabi_bits_write( fileno( stream ), helpText, len ); // ensures all bytes written or exit
	356	return len;
[d46ed6e]	357	} // printStatsXML
[c4f68dc]	358	#endif // __STATISTICS__
	359
[95eb7cf]	360
[1e034d9]	361	// thunk problem
	362	size_t Bsearchl( unsigned int key, const unsigned int * vals, size_t dim ) {
	363	size_t l = 0, m, h = dim;
	364	while ( l < h ) {
	365	m = (l + h) / 2;
	366	if ( (unsigned int &)(vals[m]) < key ) { // cast away const
	367	l = m + 1;
	368	} else {
	369	h = m;
	370	} // if
	371	} // while
	372	return l;
	373	} // Bsearchl
	374
	375
[95eb7cf]	376	static inline bool setMmapStart( size_t value ) { // true => mmapped, false => sbrk
[1076d05]	377	if ( value < pageSize \|\| bucketSizes[NoBucketSizes - 1] < value ) return false;
[95eb7cf]	378	mmapStart = value; // set global
	379
	380	// find the closest bucket size less than or equal to the mmapStart size
[1e034d9]	381	maxBucketsUsed = Bsearchl( (unsigned int)mmapStart, bucketSizes, NoBucketSizes ); // binary search
[95eb7cf]	382	assert( maxBucketsUsed < NoBucketSizes ); // subscript failure ?
	383	assert( mmapStart <= bucketSizes[maxBucketsUsed] ); // search failure ?
[1076d05]	384	return true;
[95eb7cf]	385	} // setMmapStart
	386
	387
[cfbc703d]	388	// <-------+----------------------------------------------------> bsize (bucket size)
	389	// \|header \|addr
	390	//==================================================================================
	391	// align/offset \|
	392	// <-----------------<------------+-----------------------------> bsize (bucket size)
	393	// \|fake-header \| addr
	394	#define headerAddr( addr ) ((HeapManager.Storage.Header )( (char )addr - sizeof(HeapManager.Storage) ))
	395	#define realHeader( header ) ((HeapManager.Storage.Header )((char )header - header->kind.fake.offset))
	396
	397	// <-------<<--------------------- dsize ---------------------->> bsize (bucket size)
	398	// \|header \|addr
	399	//==================================================================================
	400	// align/offset \|
	401	// <------------------------------<<---------- dsize --------->>> bsize (bucket size)
	402	// \|fake-header \|addr
	403	#define dataStorage( bsize, addr, header ) (bsize - ( (char )addr - (char )header ))
	404
	405
[9c438546]	406	// static inline void noMemory() {
	407	// abort( "Heap memory exhausted at %zu bytes.\n"
	408	// "Possible cause is very large memory allocation and/or large amount of unfreed storage allocated by the program or system/library routines.",
	409	// ((char )(sbrk( 0 )) - (char )(heapManager.heapBegin)) );
	410	// } // noMemory
	411
	412
[cfbc703d]	413	static inline void checkAlign( size_t alignment ) {
	414	if ( alignment < libAlign() \|\| ! libPow2( alignment ) ) {
	415	abort( "Alignment %zu for memory allocation is less than %d and/or not a power of 2.", alignment, libAlign() );
	416	} // if
	417	} // checkAlign
	418
	419
[e3fea42]	420	static inline void checkHeader( bool check, const char name[], void * addr ) {
[b6830d74]	421	if ( unlikely( check ) ) { // bad address ?
[c4f68dc]	422	abort( "Attempt to %s storage %p with address outside the heap.\n"
[bcb14b5]	423	"Possible cause is duplicate free on same block or overwriting of memory.",
	424	name, addr );
[b6830d74]	425	} // if
[c4f68dc]	426	} // checkHeader
	427
[95eb7cf]	428
	429	static inline void fakeHeader( HeapManager.Storage.Header *& header, size_t & alignment ) {
[b6830d74]	430	if ( unlikely( (header->kind.fake.alignment & 1) == 1 ) ) { // fake header ?
[c4f68dc]	431	alignment = header->kind.fake.alignment & -2; // remove flag from value
	432	#ifdef __CFA_DEBUG__
	433	checkAlign( alignment ); // check alignment
	434	#endif // __CFA_DEBUG__
[cfbc703d]	435	header = realHeader( header ); // backup from fake to real header
[b6830d74]	436	} // if
[c4f68dc]	437	} // fakeHeader
	438
[95eb7cf]	439
[9c438546]	440	static inline bool headers( const char name[] __attribute__(( unused )), void * addr, HeapManager.Storage.Header & header, HeapManager.FreeHeader & freeElem,
	441	size_t & size, size_t & alignment ) with( heapManager ) {
[b6830d74]	442	header = headerAddr( addr );
[c4f68dc]	443
[b6830d74]	444	if ( unlikely( heapEnd < addr ) ) { // mmapped ?
[95eb7cf]	445	fakeHeader( header, alignment );
[c4f68dc]	446	size = header->kind.real.blockSize & -3; // mmap size
	447	return true;
[b6830d74]	448	} // if
[c4f68dc]	449
	450	#ifdef __CFA_DEBUG__
[1076d05]	451	checkHeader( addr < heapBegin, name, addr ); // bad low address ?
[c4f68dc]	452	#endif // __CFA_DEBUG__
[b6830d74]	453
[bcb14b5]	454	// header may be safe to dereference
[95eb7cf]	455	fakeHeader( header, alignment );
[c4f68dc]	456	#ifdef __CFA_DEBUG__
[bcb14b5]	457	checkHeader( header < (HeapManager.Storage.Header )heapBegin \|\| (HeapManager.Storage.Header )heapEnd < header, name, addr ); // bad address ? (offset could be + or -)
[c4f68dc]	458	#endif // __CFA_DEBUG__
	459
[bcb14b5]	460	freeElem = (HeapManager.FreeHeader *)((size_t)header->kind.real.home & -3);
[c4f68dc]	461	#ifdef __CFA_DEBUG__
[bcb14b5]	462	if ( freeElem < &freeLists[0] \|\| &freeLists[NoBucketSizes] <= freeElem ) {
	463	abort( "Attempt to %s storage %p with corrupted header.\n"
	464	"Possible cause is duplicate free on same block or overwriting of header information.",
	465	name, addr );
	466	} // if
[c4f68dc]	467	#endif // __CFA_DEBUG__
[bcb14b5]	468	size = freeElem->blockSize;
	469	return false;
[c4f68dc]	470	} // headers
	471
	472
[9c438546]	473	static inline void * extend( size_t size ) with( heapManager ) {
[b6830d74]	474	lock( extlock __cfaabi_dbg_ctx2 );
	475	ptrdiff_t rem = heapRemaining - size;
	476	if ( rem < 0 ) {
[c4f68dc]	477	// If the size requested is bigger than the current remaining storage, increase the size of the heap.
	478
	479	size_t increase = libCeiling( size > heapExpand ? size : heapExpand, libAlign() );
	480	if ( sbrk( increase ) == (void *)-1 ) {
	481	unlock( extlock );
	482	errno = ENOMEM;
[95eb7cf]	483	return 0p;
[c4f68dc]	484	} // if
[bcb14b5]	485	#ifdef __STATISTICS__
[c4f68dc]	486	sbrk_calls += 1;
	487	sbrk_storage += increase;
[bcb14b5]	488	#endif // __STATISTICS__
	489	#ifdef __CFA_DEBUG__
[c4f68dc]	490	// Set new memory to garbage so subsequent uninitialized usages might fail.
	491	memset( (char *)heapEnd + heapRemaining, '\377', increase );
[bcb14b5]	492	#endif // __CFA_DEBUG__
[c4f68dc]	493	rem = heapRemaining + increase - size;
[b6830d74]	494	} // if
[c4f68dc]	495
[b6830d74]	496	HeapManager.Storage * block = (HeapManager.Storage *)heapEnd;
	497	heapRemaining = rem;
	498	heapEnd = (char *)heapEnd + size;
	499	unlock( extlock );
	500	return block;
[c4f68dc]	501	} // extend
	502
	503
[9c438546]	504	static inline void * doMalloc( size_t size ) with( heapManager ) {
[7b149bc]	505	HeapManager.Storage * block; // pointer to new block of storage
[c4f68dc]	506
[b6830d74]	507	// Look up size in the size list. Make sure the user request includes space for the header that must be allocated
	508	// along with the block and is a multiple of the alignment size.
[c4f68dc]	509
[1076d05]	510	if ( unlikely( size > ULONG_MAX - sizeof(HeapManager.Storage) ) ) return 0p;
[b6830d74]	511	size_t tsize = size + sizeof(HeapManager.Storage);
	512	if ( likely( tsize < mmapStart ) ) { // small size => sbrk
[e723100]	513	size_t posn;
	514	#ifdef FASTLOOKUP
	515	if ( tsize < LookupSizes ) posn = lookup[tsize];
	516	else
	517	#endif // FASTLOOKUP
	518	posn = Bsearchl( (unsigned int)tsize, bucketSizes, (size_t)maxBucketsUsed );
	519	HeapManager.FreeHeader * freeElem = &freeLists[posn];
	520	// #ifdef FASTLOOKUP
	521	// if ( tsize < LookupSizes )
	522	// freeElem = &freeLists[lookup[tsize]];
	523	// else
	524	// #endif // FASTLOOKUP
	525	// freeElem = bsearchl( tsize, freeLists, (size_t)maxBucketsUsed ); // binary search
	526	// HeapManager.FreeHeader * freeElem =
	527	// #ifdef FASTLOOKUP
	528	// tsize < LookupSizes ? &freeLists[lookup[tsize]] :
	529	// #endif // FASTLOOKUP
	530	// bsearchl( tsize, freeLists, (size_t)maxBucketsUsed ); // binary search
[c4f68dc]	531	assert( freeElem <= &freeLists[maxBucketsUsed] ); // subscripting error ?
	532	assert( tsize <= freeElem->blockSize ); // search failure ?
	533	tsize = freeElem->blockSize; // total space needed for request
	534
	535	// Spin until the lock is acquired for this particular size of block.
	536
[9c438546]	537	#if BUCKETLOCK == SPINLOCK
[bcb14b5]	538	lock( freeElem->lock __cfaabi_dbg_ctx2 );
	539	block = freeElem->freeList; // remove node from stack
[c4f68dc]	540	#else
[9c438546]	541	block = pop( freeElem->freeList );
	542	#endif // BUCKETLOCK
[95eb7cf]	543	if ( unlikely( block == 0p ) ) { // no free block ?
[9c438546]	544	#if BUCKETLOCK == SPINLOCK
[c4f68dc]	545	unlock( freeElem->lock );
[9c438546]	546	#endif // BUCKETLOCK
[bcb14b5]	547
[c4f68dc]	548	// Freelist for that size was empty, so carve it out of the heap if there's enough left, or get some more
	549	// and then carve it off.
	550
	551	block = (HeapManager.Storage *)extend( tsize ); // mutual exclusion on call
[9c438546]	552	if ( unlikely( block == 0p ) ) return 0p;
	553	#if BUCKETLOCK == SPINLOCK
[c4f68dc]	554	} else {
	555	freeElem->freeList = block->header.kind.real.next;
	556	unlock( freeElem->lock );
[9c438546]	557	#endif // BUCKETLOCK
[c4f68dc]	558	} // if
	559
	560	block->header.kind.real.home = freeElem; // pointer back to free list of apropriate size
[bcb14b5]	561	} else { // large size => mmap
[1076d05]	562	if ( unlikely( size > ULONG_MAX - pageSize ) ) return 0p;
[c4f68dc]	563	tsize = libCeiling( tsize, pageSize ); // must be multiple of page size
	564	#ifdef __STATISTICS__
[bcb14b5]	565	__atomic_add_fetch( &mmap_calls, 1, __ATOMIC_SEQ_CST );
	566	__atomic_add_fetch( &mmap_storage, tsize, __ATOMIC_SEQ_CST );
[c4f68dc]	567	#endif // __STATISTICS__
	568	block = (HeapManager.Storage *)mmap( 0, tsize, PROT_READ \| PROT_WRITE, MAP_PRIVATE \| MAP_ANONYMOUS, mmapFd, 0 );
	569	if ( block == (HeapManager.Storage *)MAP_FAILED ) {
	570	// Do not call strerror( errno ) as it may call malloc.
	571	abort( "(HeapManager &)0x%p.doMalloc() : internal error, mmap failure, size:%zu error:%d.", &heapManager, tsize, errno );
	572	} // if
[bcb14b5]	573	#ifdef __CFA_DEBUG__
[c4f68dc]	574	// Set new memory to garbage so subsequent uninitialized usages might fail.
	575	memset( block, '\377', tsize );
[bcb14b5]	576	#endif // __CFA_DEBUG__
[c4f68dc]	577	block->header.kind.real.blockSize = tsize; // storage size for munmap
[bcb14b5]	578	} // if
[c4f68dc]	579
[9c438546]	580	block->header.kind.real.size = size; // store allocation size
[95eb7cf]	581	void * addr = &(block->data); // adjust off header to user bytes
[c4f68dc]	582
	583	#ifdef __CFA_DEBUG__
[95eb7cf]	584	assert( ((uintptr_t)addr & (libAlign() - 1)) == 0 ); // minimum alignment ?
[bcb14b5]	585	__atomic_add_fetch( &allocFree, tsize, __ATOMIC_SEQ_CST );
	586	if ( traceHeap() ) {
	587	enum { BufferSize = 64 };
	588	char helpText[BufferSize];
[95eb7cf]	589	int len = snprintf( helpText, BufferSize, "%p = Malloc( %zu ) (allocated %zu)\n", addr, size, tsize );
	590	// int len = snprintf( helpText, BufferSize, "Malloc %p %zu\n", addr, size );
	591	__cfaabi_bits_write( STDERR_FILENO, helpText, len ); // print debug/nodebug
[bcb14b5]	592	} // if
[c4f68dc]	593	#endif // __CFA_DEBUG__
	594
[95eb7cf]	595	return addr;
[c4f68dc]	596	} // doMalloc
	597
	598
[9c438546]	599	static inline void doFree( void * addr ) with( heapManager ) {
[c4f68dc]	600	#ifdef __CFA_DEBUG__
[95eb7cf]	601	if ( unlikely( heapManager.heapBegin == 0p ) ) {
[bcb14b5]	602	abort( "doFree( %p ) : internal error, called before heap is initialized.", addr );
	603	} // if
[c4f68dc]	604	#endif // __CFA_DEBUG__
	605
[b6830d74]	606	HeapManager.Storage.Header * header;
	607	HeapManager.FreeHeader * freeElem;
	608	size_t size, alignment; // not used (see realloc)
[c4f68dc]	609
[b6830d74]	610	if ( headers( "free", addr, header, freeElem, size, alignment ) ) { // mmapped ?
[c4f68dc]	611	#ifdef __STATISTICS__
[bcb14b5]	612	__atomic_add_fetch( &munmap_calls, 1, __ATOMIC_SEQ_CST );
	613	__atomic_add_fetch( &munmap_storage, size, __ATOMIC_SEQ_CST );
[c4f68dc]	614	#endif // __STATISTICS__
	615	if ( munmap( header, size ) == -1 ) {
	616	#ifdef __CFA_DEBUG__
	617	abort( "Attempt to deallocate storage %p not allocated or with corrupt header.\n"
[bcb14b5]	618	"Possible cause is invalid pointer.",
	619	addr );
[c4f68dc]	620	#endif // __CFA_DEBUG__
	621	} // if
[bcb14b5]	622	} else {
[c4f68dc]	623	#ifdef __CFA_DEBUG__
[bcb14b5]	624	// Set free memory to garbage so subsequent usages might fail.
	625	memset( ((HeapManager.Storage *)header)->data, '\377', freeElem->blockSize - sizeof( HeapManager.Storage ) );
[c4f68dc]	626	#endif // __CFA_DEBUG__
	627
	628	#ifdef __STATISTICS__
[bcb14b5]	629	free_storage += size;
[c4f68dc]	630	#endif // __STATISTICS__
[9c438546]	631	#if BUCKETLOCK == SPINLOCK
[bcb14b5]	632	lock( freeElem->lock __cfaabi_dbg_ctx2 ); // acquire spin lock
	633	header->kind.real.next = freeElem->freeList; // push on stack
	634	freeElem->freeList = (HeapManager.Storage *)header;
	635	unlock( freeElem->lock ); // release spin lock
[c4f68dc]	636	#else
[9c438546]	637	push( freeElem->freeList, (HeapManager.Storage )header );
	638	#endif // BUCKETLOCK
[bcb14b5]	639	} // if
[c4f68dc]	640
	641	#ifdef __CFA_DEBUG__
[bcb14b5]	642	__atomic_add_fetch( &allocFree, -size, __ATOMIC_SEQ_CST );
	643	if ( traceHeap() ) {
[7b149bc]	644	enum { BufferSize = 64 };
	645	char helpText[BufferSize];
[bcb14b5]	646	int len = snprintf( helpText, sizeof(helpText), "Free( %p ) size:%zu\n", addr, size );
[95eb7cf]	647	__cfaabi_bits_write( STDERR_FILENO, helpText, len ); // print debug/nodebug
[bcb14b5]	648	} // if
[c4f68dc]	649	#endif // __CFA_DEBUG__
	650	} // doFree
	651
	652
[9c438546]	653	size_t prtFree( HeapManager & manager ) with( manager ) {
[b6830d74]	654	size_t total = 0;
[c4f68dc]	655	#ifdef __STATISTICS__
[95eb7cf]	656	__cfaabi_bits_acquire();
	657	__cfaabi_bits_print_nolock( STDERR_FILENO, "\nBin lists (bin size : free blocks on list)\n" );
[c4f68dc]	658	#endif // __STATISTICS__
[b6830d74]	659	for ( unsigned int i = 0; i < maxBucketsUsed; i += 1 ) {
[d46ed6e]	660	size_t size = freeLists[i].blockSize;
	661	#ifdef __STATISTICS__
	662	unsigned int N = 0;
	663	#endif // __STATISTICS__
[b6830d74]	664
[9c438546]	665	#if BUCKETLOCK == SPINLOCK
[95eb7cf]	666	for ( HeapManager.Storage * p = freeLists[i].freeList; p != 0p; p = p->header.kind.real.next ) {
[d46ed6e]	667	#else
[9c438546]	668	for ( HeapManager.Storage * p = top( freeLists[i].freeList ); p != 0p; /* p = getNext( p )->top */) {
[0f89d4f]	669	typeof(p) temp = ( p )`next->top; // FIX ME: direct assignent fails, initialization works
[9c438546]	670	p = temp;
	671	#endif // BUCKETLOCK
[d46ed6e]	672	total += size;
	673	#ifdef __STATISTICS__
	674	N += 1;
	675	#endif // __STATISTICS__
[b6830d74]	676	} // for
	677
[d46ed6e]	678	#ifdef __STATISTICS__
[95eb7cf]	679	__cfaabi_bits_print_nolock( STDERR_FILENO, "%7zu, %-7u ", size, N );
	680	if ( (i + 1) % 8 == 0 ) __cfaabi_bits_print_nolock( STDERR_FILENO, "\n" );
[d46ed6e]	681	#endif // __STATISTICS__
	682	} // for
	683	#ifdef __STATISTICS__
[95eb7cf]	684	__cfaabi_bits_print_nolock( STDERR_FILENO, "\ntotal free blocks:%zu\n", total );
	685	__cfaabi_bits_release();
[d46ed6e]	686	#endif // __STATISTICS__
	687	return (char )heapEnd - (char )heapBegin - total;
[95eb7cf]	688	} // prtFree
	689
	690
[9c438546]	691	static void ?{}( HeapManager & manager ) with( manager ) {
[95eb7cf]	692	pageSize = sysconf( _SC_PAGESIZE );
	693
	694	for ( unsigned int i = 0; i < NoBucketSizes; i += 1 ) { // initialize the free lists
	695	freeLists[i].blockSize = bucketSizes[i];
	696	} // for
	697
	698	#ifdef FASTLOOKUP
	699	unsigned int idx = 0;
	700	for ( unsigned int i = 0; i < LookupSizes; i += 1 ) {
	701	if ( i > bucketSizes[idx] ) idx += 1;
	702	lookup[i] = idx;
	703	} // for
	704	#endif // FASTLOOKUP
	705
[1076d05]	706	if ( ! setMmapStart( default_mmap_start() ) ) {
[95eb7cf]	707	abort( "HeapManager : internal error, mmap start initialization failure." );
	708	} // if
	709	heapExpand = default_heap_expansion();
	710
[1e034d9]	711	char * end = (char *)sbrk( 0 );
[1076d05]	712	heapBegin = heapEnd = sbrk( (char *)libCeiling( (long unsigned int)end, libAlign() ) - end ); // move start of heap to multiple of alignment
[95eb7cf]	713	} // HeapManager
	714
	715
	716	static void ^?{}( HeapManager & ) {
	717	#ifdef __STATISTICS__
[baf608a]	718	if ( traceHeapTerm() ) {
	719	printStats();
	720	// if ( prtfree() ) prtFree( heapManager, true );
	721	} // if
[95eb7cf]	722	#endif // __STATISTICS__
	723	} // ~HeapManager
	724
	725
	726	static void memory_startup( void ) __attribute__(( constructor( STARTUP_PRIORITY_MEMORY ) ));
	727	void memory_startup( void ) {
	728	#ifdef __CFA_DEBUG__
	729	if ( unlikely( heapBoot ) ) { // check for recursion during system boot
	730	// DO NOT USE STREAMS AS THEY MAY BE UNAVAILABLE AT THIS POINT.
	731	abort( "boot() : internal error, recursively invoked during system boot." );
	732	} // if
	733	heapBoot = true;
	734	#endif // __CFA_DEBUG__
	735
	736	//assert( heapManager.heapBegin != 0 );
	737	//heapManager{};
[1076d05]	738	if ( heapManager.heapBegin == 0p ) heapManager{}; // sanity check
[95eb7cf]	739	} // memory_startup
	740
	741	static void memory_shutdown( void ) __attribute__(( destructor( STARTUP_PRIORITY_MEMORY ) ));
	742	void memory_shutdown( void ) {
	743	^heapManager{};
	744	} // memory_shutdown
[c4f68dc]	745
[bcb14b5]	746
	747	static inline void * mallocNoStats( size_t size ) { // necessary for malloc statistics
[7117ac3]	748	//assert( heapManager.heapBegin != 0 );
[95eb7cf]	749	if ( unlikely( heapManager.heapBegin == 0p ) ) heapManager{}; // called before memory_startup ?
[76e2113]	750	#if __SIZEOF_POINTER__ == 8
	751	verify( size < ((typeof(size_t))1 << 48) );
	752	#endif // __SIZEOF_POINTER__ == 8
[95eb7cf]	753	void * addr = doMalloc( size );
	754	if ( unlikely( addr == 0p ) ) errno = ENOMEM; // POSIX
	755	return addr;
[bcb14b5]	756	} // mallocNoStats
[c4f68dc]	757
	758
[76e2113]	759	static inline void * callocNoStats( size_t dim, size_t elemSize ) {
	760	size_t size = dim * elemSize;
[95eb7cf]	761	char * addr = (char *)mallocNoStats( size );
	762	if ( unlikely( addr == 0p ) ) return 0p;
	763
	764	HeapManager.Storage.Header * header;
	765	HeapManager.FreeHeader * freeElem;
	766	size_t bsize, alignment;
	767	bool mapped __attribute__(( unused )) = headers( "calloc", addr, header, freeElem, bsize, alignment );
	768	#ifndef __CFA_DEBUG__
	769	// Mapped storage is zero filled, but in debug mode mapped memory is scrubbed in doMalloc, so it has to be reset to zero.
	770	if ( ! mapped )
	771	#endif // __CFA_DEBUG__
[1e034d9]	772	// Zero entire data space even when > than size => realloc without a new allocation and zero fill works.
	773	// <-------00000000000000000000000000000000000000000000000000000> bsize (bucket size)
	774	// `-header`-addr `-size
[95eb7cf]	775	memset( addr, '\0', bsize - sizeof(HeapManager.Storage) ); // set to zeros
	776
	777	header->kind.real.blockSize \|= 2; // mark as zero filled
	778	return addr;
	779	} // callocNoStats
	780
	781
[bcb14b5]	782	static inline void * memalignNoStats( size_t alignment, size_t size ) { // necessary for malloc statistics
	783	#ifdef __CFA_DEBUG__
[b6830d74]	784	checkAlign( alignment ); // check alignment
[bcb14b5]	785	#endif // __CFA_DEBUG__
[c4f68dc]	786
[b6830d74]	787	// if alignment <= default alignment, do normal malloc as two headers are unnecessary
[bcb14b5]	788	if ( unlikely( alignment <= libAlign() ) ) return mallocNoStats( size );
[b6830d74]	789
	790	// Allocate enough storage to guarantee an address on the alignment boundary, and sufficient space before it for
	791	// administrative storage. NOTE, WHILE THERE ARE 2 HEADERS, THE FIRST ONE IS IMPLICITLY CREATED BY DOMALLOC.
	792	// .-------------v-----------------v----------------v----------,
	793	// \| Real Header \| ... padding ... \| Fake Header \| data ... \|
	794	// `-------------^-----------------^-+--------------^----------'
	795	// \|<--------------------------------' offset/align \|<-- alignment boundary
	796
	797	// subtract libAlign() because it is already the minimum alignment
	798	// add sizeof(Storage) for fake header
[95eb7cf]	799	char * addr = (char *)mallocNoStats( size + alignment - libAlign() + sizeof(HeapManager.Storage) );
	800	if ( unlikely( addr == 0p ) ) return addr;
[b6830d74]	801
	802	// address in the block of the "next" alignment address
[95eb7cf]	803	char * user = (char *)libCeiling( (uintptr_t)(addr + sizeof(HeapManager.Storage)), alignment );
[b6830d74]	804
	805	// address of header from malloc
[95eb7cf]	806	HeapManager.Storage.Header * realHeader = headerAddr( addr );
[4cf617e]	807	realHeader->kind.real.size = size; // correct size to eliminate above alignment offset
[b6830d74]	808	// address of fake header * before* the alignment location
	809	HeapManager.Storage.Header * fakeHeader = headerAddr( user );
	810	// SKULLDUGGERY: insert the offset to the start of the actual storage block and remember alignment
	811	fakeHeader->kind.fake.offset = (char )fakeHeader - (char )realHeader;
	812	// SKULLDUGGERY: odd alignment imples fake header
	813	fakeHeader->kind.fake.alignment = alignment \| 1;
	814
	815	return user;
[bcb14b5]	816	} // memalignNoStats
[c4f68dc]	817
	818
[76e2113]	819	static inline void * cmemalignNoStats( size_t alignment, size_t dim, size_t elemSize ) {
	820	size_t size = dim * elemSize;
[95eb7cf]	821	char * addr = (char *)memalignNoStats( alignment, size );
	822	if ( unlikely( addr == 0p ) ) return 0p;
	823	HeapManager.Storage.Header * header;
	824	HeapManager.FreeHeader * freeElem;
	825	size_t bsize;
	826	bool mapped __attribute__(( unused )) = headers( "cmemalign", addr, header, freeElem, bsize, alignment );
	827	#ifndef __CFA_DEBUG__
	828	// Mapped storage is zero filled, but in debug mode mapped memory is scrubbed in doMalloc, so it has to be reset to zero.
	829	if ( ! mapped )
	830	#endif // __CFA_DEBUG__
	831	memset( addr, '\0', dataStorage( bsize, addr, header ) ); // set to zeros
	832
[cfbc703d]	833	header->kind.real.blockSize \|= 2; // mark as zero filled
[95eb7cf]	834	return addr;
	835	} // cmemalignNoStats
	836
	837
[e723100]	838	// supported mallopt options
	839	#ifndef M_MMAP_THRESHOLD
	840	#define M_MMAP_THRESHOLD (-1)
	841	#endif // M_TOP_PAD
	842	#ifndef M_TOP_PAD
	843	#define M_TOP_PAD (-2)
	844	#endif // M_TOP_PAD
	845
	846
[c4f68dc]	847	extern "C" {
[61248a4]	848	// Allocates size bytes and returns a pointer to the allocated memory. The contents are undefined. If size is 0,
	849	// then malloc() returns a unique pointer value that can later be successfully passed to free().
[b6830d74]	850	void * malloc( size_t size ) {
[c4f68dc]	851	#ifdef __STATISTICS__
[bcb14b5]	852	__atomic_add_fetch( &malloc_calls, 1, __ATOMIC_SEQ_CST );
	853	__atomic_add_fetch( &malloc_storage, size, __ATOMIC_SEQ_CST );
[c4f68dc]	854	#endif // __STATISTICS__
	855
[bcb14b5]	856	return mallocNoStats( size );
	857	} // malloc
[c4f68dc]	858
[76e2113]	859
[61248a4]	860	// Same as malloc() except size bytes is an array of dim elements each of elemSize bytes.
[76e2113]	861	void * aalloc( size_t dim, size_t elemSize ) {
	862	#ifdef __STATISTICS__
	863	__atomic_add_fetch( &aalloc_calls, 1, __ATOMIC_SEQ_CST );
	864	__atomic_add_fetch( &aalloc_storage, dim * elemSize, __ATOMIC_SEQ_CST );
	865	#endif // __STATISTICS__
	866
[1076d05]	867	return mallocNoStats( dim * elemSize );
[76e2113]	868	} // aalloc
	869
	870
[61248a4]	871	// Same as aalloc() with memory set to zero.
[76e2113]	872	void * calloc( size_t dim, size_t elemSize ) {
[c4f68dc]	873	#ifdef __STATISTICS__
[bcb14b5]	874	__atomic_add_fetch( &calloc_calls, 1, __ATOMIC_SEQ_CST );
[76e2113]	875	__atomic_add_fetch( &calloc_storage, dim * elemSize, __ATOMIC_SEQ_CST );
[c4f68dc]	876	#endif // __STATISTICS__
	877
[76e2113]	878	return callocNoStats( dim, elemSize );
[bcb14b5]	879	} // calloc
[c4f68dc]	880
[61248a4]	881	// Change the size of the memory block pointed to by oaddr to size bytes. The contents are undefined. If oaddr is
	882	// 0p, then the call is equivalent to malloc(size), for all values of size; if size is equal to zero, and oaddr is
	883	// not 0p, then the call is equivalent to free(oaddr). Unless oaddr is 0p, it must have been returned by an earlier
	884	// call to malloc(), alloc(), calloc() or realloc(). If the area pointed to was moved, a free(oaddr) is done.
[cfbc703d]	885	void * resize( void * oaddr, size_t size ) {
	886	#ifdef __STATISTICS__
	887	__atomic_add_fetch( &resize_calls, 1, __ATOMIC_SEQ_CST );
	888	__atomic_add_fetch( &resize_storage, size, __ATOMIC_SEQ_CST );
	889	#endif // __STATISTICS__
	890
	891	// If size is equal to 0, either NULL or a pointer suitable to be passed to free() is returned.
	892	if ( unlikely( size == 0 ) ) { free( oaddr ); return mallocNoStats( size ); } // special cases
	893	if ( unlikely( oaddr == 0p ) ) return mallocNoStats( size );
	894
	895	HeapManager.Storage.Header * header;
	896	HeapManager.FreeHeader * freeElem;
	897	size_t bsize, oalign = 0;
	898	headers( "resize", oaddr, header, freeElem, bsize, oalign );
	899
[76e2113]	900	size_t odsize = dataStorage( bsize, oaddr, header ); // data storage available in bucket
[cfbc703d]	901	// same size, DO NOT preserve STICKY PROPERTIES.
[76e2113]	902	if ( oalign == 0 && size <= odsize && odsize <= size * 2 ) { // allow 50% wasted storage for smaller size
[cfbc703d]	903	header->kind.real.blockSize &= -2; // no alignment and turn off 0 fill
[2b23d78]	904	if ( size != odsize ) header->kind.real.size = size; // reset allocation size
[cfbc703d]	905	return oaddr;
	906	} // if
[0f89d4f]	907
[cfbc703d]	908	// change size, DO NOT preserve STICKY PROPERTIES.
	909	free( oaddr );
[1076d05]	910	void * naddr = mallocNoStats( size ); // create new area
[cfbc703d]	911	return naddr;
	912	} // resize
	913
	914
[61248a4]	915	// Same as resize() but the contents are unchanged in the range from the start of the region up to the minimum of
[cfbc703d]	916	// the old and new sizes.
[95eb7cf]	917	void * realloc( void * oaddr, size_t size ) {
[c4f68dc]	918	#ifdef __STATISTICS__
[bcb14b5]	919	__atomic_add_fetch( &realloc_calls, 1, __ATOMIC_SEQ_CST );
[cfbc703d]	920	__atomic_add_fetch( &realloc_storage, size, __ATOMIC_SEQ_CST );
[c4f68dc]	921	#endif // __STATISTICS__
	922
[1f6de372]	923	// If size is equal to 0, either NULL or a pointer suitable to be passed to free() is returned.
	924	if ( unlikely( size == 0 ) ) { free( oaddr ); return mallocNoStats( size ); } // special cases
[95eb7cf]	925	if ( unlikely( oaddr == 0p ) ) return mallocNoStats( size );
[c4f68dc]	926
	927	HeapManager.Storage.Header * header;
	928	HeapManager.FreeHeader * freeElem;
[95eb7cf]	929	size_t bsize, oalign = 0;
	930	headers( "realloc", oaddr, header, freeElem, bsize, oalign );
	931
	932	size_t odsize = dataStorage( bsize, oaddr, header ); // data storage available in bucket
[2b23d78]	933	if ( size <= odsize && odsize <= size * 2 ) { // allow up to 50% wasted storage in smaller size
	934	if ( size != odsize ) header->kind.real.size = size; // reset allocation size
[95eb7cf]	935	return oaddr;
[c4f68dc]	936	} // if
	937
[95eb7cf]	938	// change size and copy old content to new storage
	939
	940	void * naddr;
	941	if ( unlikely( oalign != 0 ) ) { // previous request memalign?
	942	if ( unlikely( header->kind.real.blockSize & 2 ) ) { // previous request zero fill
	943	naddr = cmemalignNoStats( oalign, 1, size ); // create new aligned area
	944	} else {
	945	naddr = memalignNoStats( oalign, size ); // create new aligned area
	946	} // if
[c4f68dc]	947	} else {
[95eb7cf]	948	if ( unlikely( header->kind.real.blockSize & 2 ) ) { // previous request zero fill
	949	naddr = callocNoStats( 1, size ); // create new area
	950	} else {
	951	naddr = mallocNoStats( size ); // create new area
	952	} // if
[c4f68dc]	953	} // if
[95eb7cf]	954	if ( unlikely( naddr == 0p ) ) return 0p;
[1e034d9]	955
[95eb7cf]	956	headers( "realloc", naddr, header, freeElem, bsize, oalign );
	957	size_t ndsize = dataStorage( bsize, naddr, header ); // data storage avilable in bucket
	958	// To preserve prior fill, the entire bucket must be copied versus the size.
	959	memcpy( naddr, oaddr, MIN( odsize, ndsize ) ); // copy bytes
	960	free( oaddr );
	961	return naddr;
[b6830d74]	962	} // realloc
[c4f68dc]	963
[61248a4]	964	// Same as malloc() except the memory address is a multiple of alignment, which must be a power of two. (obsolete)
[bcb14b5]	965	void * memalign( size_t alignment, size_t size ) {
[c4f68dc]	966	#ifdef __STATISTICS__
	967	__atomic_add_fetch( &memalign_calls, 1, __ATOMIC_SEQ_CST );
	968	__atomic_add_fetch( &memalign_storage, size, __ATOMIC_SEQ_CST );
	969	#endif // __STATISTICS__
	970
[95eb7cf]	971	return memalignNoStats( alignment, size );
[bcb14b5]	972	} // memalign
[c4f68dc]	973
[95eb7cf]	974
[76e2113]	975	// Same as aalloc() with memory alignment.
	976	void * amemalign( size_t alignment, size_t dim, size_t elemSize ) {
	977	#ifdef __STATISTICS__
	978	__atomic_add_fetch( &cmemalign_calls, 1, __ATOMIC_SEQ_CST );
	979	__atomic_add_fetch( &cmemalign_storage, dim * elemSize, __ATOMIC_SEQ_CST );
	980	#endif // __STATISTICS__
	981
[1076d05]	982	return memalignNoStats( alignment, dim * elemSize );
[76e2113]	983	} // amemalign
	984
	985
[ca7949b]	986	// Same as calloc() with memory alignment.
[76e2113]	987	void * cmemalign( size_t alignment, size_t dim, size_t elemSize ) {
[95eb7cf]	988	#ifdef __STATISTICS__
	989	__atomic_add_fetch( &cmemalign_calls, 1, __ATOMIC_SEQ_CST );
[76e2113]	990	__atomic_add_fetch( &cmemalign_storage, dim * elemSize, __ATOMIC_SEQ_CST );
[95eb7cf]	991	#endif // __STATISTICS__
	992
[76e2113]	993	return cmemalignNoStats( alignment, dim, elemSize );
[95eb7cf]	994	} // cmemalign
	995
[ca7949b]	996	// Same as memalign(), but ISO/IEC 2011 C11 Section 7.22.2 states: the value of size shall be an integral multiple
	997	// of alignment. This requirement is universally ignored.
[b6830d74]	998	void * aligned_alloc( size_t alignment, size_t size ) {
[c4f68dc]	999	return memalign( alignment, size );
[b6830d74]	1000	} // aligned_alloc
[c4f68dc]	1001
	1002
[ca7949b]	1003	// Allocates size bytes and places the address of the allocated memory in *memptr. The address of the allocated
	1004	// memory shall be a multiple of alignment, which must be a power of two and a multiple of sizeof(void *). If size
	1005	// is 0, then posix_memalign() returns either 0p, or a unique pointer value that can later be successfully passed to
	1006	// free(3).
[b6830d74]	1007	int posix_memalign( void ** memptr, size_t alignment, size_t size ) {
[bcb14b5]	1008	if ( alignment < sizeof(void *) \|\| ! libPow2( alignment ) ) return EINVAL; // check alignment
[c4f68dc]	1009	* memptr = memalign( alignment, size );
[95eb7cf]	1010	if ( unlikely( * memptr == 0p ) ) return ENOMEM;
[c4f68dc]	1011	return 0;
[b6830d74]	1012	} // posix_memalign
[c4f68dc]	1013
[ca7949b]	1014	// Allocates size bytes and returns a pointer to the allocated memory. The memory address shall be a multiple of the
	1015	// page size. It is equivalent to memalign(sysconf(_SC_PAGESIZE),size).
[b6830d74]	1016	void * valloc( size_t size ) {
[c4f68dc]	1017	return memalign( pageSize, size );
[b6830d74]	1018	} // valloc
[c4f68dc]	1019
	1020
[ca7949b]	1021	// Same as valloc but rounds size to multiple of page size.
	1022	void * pvalloc( size_t size ) {
	1023	return memalign( pageSize, libCeiling( size, pageSize ) );
	1024	} // pvalloc
	1025
	1026
	1027	// Frees the memory space pointed to by ptr, which must have been returned by a previous call to malloc(), calloc()
[1076d05]	1028	// or realloc(). Otherwise, or if free(ptr) has already been called before, undefined behaviour occurs. If ptr is
[ca7949b]	1029	// 0p, no operation is performed.
[b6830d74]	1030	void free( void * addr ) {
[c4f68dc]	1031	#ifdef __STATISTICS__
[bcb14b5]	1032	__atomic_add_fetch( &free_calls, 1, __ATOMIC_SEQ_CST );
[c4f68dc]	1033	#endif // __STATISTICS__
	1034
[95eb7cf]	1035	if ( unlikely( addr == 0p ) ) { // special case
	1036	// #ifdef __CFA_DEBUG__
	1037	// if ( traceHeap() ) {
	1038	// #define nullmsg "Free( 0x0 ) size:0\n"
[1e034d9]	1039	// // Do not debug print free( 0p ), as it can cause recursive entry from sprintf.
[95eb7cf]	1040	// __cfaabi_dbg_write( nullmsg, sizeof(nullmsg) - 1 );
	1041	// } // if
	1042	// #endif // __CFA_DEBUG__
[c4f68dc]	1043	return;
	1044	} // exit
	1045
	1046	doFree( addr );
[b6830d74]	1047	} // free
[93c2e0a]	1048
[c4f68dc]	1049
[76e2113]	1050	// Returns the alignment of an allocation.
[b6830d74]	1051	size_t malloc_alignment( void * addr ) {
[95eb7cf]	1052	if ( unlikely( addr == 0p ) ) return libAlign(); // minimum alignment
[1aa6ecb]	1053	HeapManager.Storage.Header * header = headerAddr( addr );
[c4f68dc]	1054	if ( (header->kind.fake.alignment & 1) == 1 ) { // fake header ?
	1055	return header->kind.fake.alignment & -2; // remove flag from value
	1056	} else {
[cfbc703d]	1057	return libAlign(); // minimum alignment
[c4f68dc]	1058	} // if
[bcb14b5]	1059	} // malloc_alignment
[c4f68dc]	1060
[76e2113]	1061	// Set the alignment for an the allocation and return previous alignment or 0 if no alignment.
	1062	size_t $malloc_alignment_set( void * addr, size_t alignment ) {
	1063	if ( unlikely( addr == 0p ) ) return libAlign(); // minimum alignment
	1064	size_t ret;
	1065	HeapManager.Storage.Header * header = headerAddr( addr );
	1066	if ( (header->kind.fake.alignment & 1) == 1 ) { // fake header ?
	1067	ret = header->kind.fake.alignment & -2; // remove flag from old value
	1068	header->kind.fake.alignment = alignment \| 1; // add flag to new value
	1069	} else {
	1070	ret = 0; // => no alignment to change
	1071	} // if
	1072	return ret;
	1073	} // $malloc_alignment_set
	1074
[c4f68dc]	1075
[76e2113]	1076	// Returns true if the allocation is zero filled, e.g., allocated by calloc().
[b6830d74]	1077	bool malloc_zero_fill( void * addr ) {
[95eb7cf]	1078	if ( unlikely( addr == 0p ) ) return false; // null allocation is not zero fill
[1aa6ecb]	1079	HeapManager.Storage.Header * header = headerAddr( addr );
[c4f68dc]	1080	if ( (header->kind.fake.alignment & 1) == 1 ) { // fake header ?
[cfbc703d]	1081	header = realHeader( header ); // backup from fake to real header
[c4f68dc]	1082	} // if
[76e2113]	1083	return (header->kind.real.blockSize & 2) != 0; // zero filled ?
[bcb14b5]	1084	} // malloc_zero_fill
[c4f68dc]	1085
[76e2113]	1086	// Set allocation is zero filled and return previous zero filled.
	1087	bool $malloc_zero_fill_set( void * addr ) {
	1088	if ( unlikely( addr == 0p ) ) return false; // null allocation is not zero fill
	1089	HeapManager.Storage.Header * header = headerAddr( addr );
	1090	if ( (header->kind.fake.alignment & 1) == 1 ) { // fake header ?
	1091	header = realHeader( header ); // backup from fake to real header
	1092	} // if
	1093	bool ret = (header->kind.real.blockSize & 2) != 0; // zero filled ?
	1094	header->kind.real.blockSize \|= 2; // mark as zero filled
	1095	return ret;
	1096	} // $malloc_zero_fill_set
	1097
[c4f68dc]	1098
[76e2113]	1099	// Returns original total allocation size (not bucket size) => array size is dimension * sizeif(T).
	1100	size_t malloc_size( void * addr ) {
[849fb370]	1101	if ( unlikely( addr == 0p ) ) return 0; // null allocation has zero size
[cfbc703d]	1102	HeapManager.Storage.Header * header = headerAddr( addr );
	1103	if ( (header->kind.fake.alignment & 1) == 1 ) { // fake header ?
	1104	header = realHeader( header ); // backup from fake to real header
	1105	} // if
[9c438546]	1106	return header->kind.real.size;
[76e2113]	1107	} // malloc_size
	1108
	1109	// Set allocation size and return previous size.
	1110	size_t $malloc_size_set( void * addr, size_t size ) {
[849fb370]	1111	if ( unlikely( addr == 0p ) ) return 0; // null allocation has 0 size
[76e2113]	1112	HeapManager.Storage.Header * header = headerAddr( addr );
	1113	if ( (header->kind.fake.alignment & 1) == 1 ) { // fake header ?
	1114	header = realHeader( header ); // backup from fake to real header
	1115	} // if
[9c438546]	1116	size_t ret = header->kind.real.size;
	1117	header->kind.real.size = size;
[76e2113]	1118	return ret;
	1119	} // $malloc_size_set
[cfbc703d]	1120
	1121
[ca7949b]	1122	// Returns the number of usable bytes in the block pointed to by ptr, a pointer to a block of memory allocated by
	1123	// malloc or a related function.
[95eb7cf]	1124	size_t malloc_usable_size( void * addr ) {
	1125	if ( unlikely( addr == 0p ) ) return 0; // null allocation has 0 size
	1126	HeapManager.Storage.Header * header;
	1127	HeapManager.FreeHeader * freeElem;
	1128	size_t bsize, alignment;
	1129
	1130	headers( "malloc_usable_size", addr, header, freeElem, bsize, alignment );
	1131	return dataStorage( bsize, addr, header ); // data storage in bucket
	1132	} // malloc_usable_size
	1133
	1134
[ca7949b]	1135	// Prints (on default standard error) statistics about memory allocated by malloc and related functions.
[b6830d74]	1136	void malloc_stats( void ) {
[c4f68dc]	1137	#ifdef __STATISTICS__
[bcb14b5]	1138	printStats();
[95eb7cf]	1139	if ( prtFree() ) prtFree( heapManager );
[c4f68dc]	1140	#endif // __STATISTICS__
[bcb14b5]	1141	} // malloc_stats
[c4f68dc]	1142
[ca7949b]	1143	// Changes the file descripter where malloc_stats() writes statistics.
[95eb7cf]	1144	int malloc_stats_fd( int fd __attribute__(( unused )) ) {
[c4f68dc]	1145	#ifdef __STATISTICS__
[bcb14b5]	1146	int temp = statfd;
	1147	statfd = fd;
	1148	return temp;
[c4f68dc]	1149	#else
[bcb14b5]	1150	return -1;
[c4f68dc]	1151	#endif // __STATISTICS__
[bcb14b5]	1152	} // malloc_stats_fd
[c4f68dc]	1153
[95eb7cf]	1154
[1076d05]	1155	// Adjusts parameters that control the behaviour of the memory-allocation functions (see malloc). The param argument
[ca7949b]	1156	// specifies the parameter to be modified, and value specifies the new value for that parameter.
[95eb7cf]	1157	int mallopt( int option, int value ) {
	1158	choose( option ) {
	1159	case M_TOP_PAD:
[1076d05]	1160	heapExpand = ceiling( value, pageSize ); return 1;
[95eb7cf]	1161	case M_MMAP_THRESHOLD:
	1162	if ( setMmapStart( value ) ) return 1;
[1076d05]	1163	break;
[95eb7cf]	1164	} // switch
	1165	return 0; // error, unsupported
	1166	} // mallopt
	1167
[ca7949b]	1168	// Attempt to release free memory at the top of the heap (by calling sbrk with a suitable argument).
[95eb7cf]	1169	int malloc_trim( size_t ) {
	1170	return 0; // => impossible to release memory
	1171	} // malloc_trim
	1172
	1173
[ca7949b]	1174	// Exports an XML string that describes the current state of the memory-allocation implementation in the caller.
	1175	// The string is printed on the file stream stream. The exported string includes information about all arenas (see
	1176	// malloc).
[c4f68dc]	1177	int malloc_info( int options, FILE * stream ) {
[95eb7cf]	1178	if ( options != 0 ) { errno = EINVAL; return -1; }
[d46ed6e]	1179	return printStatsXML( stream );
[c4f68dc]	1180	} // malloc_info
	1181
	1182
[ca7949b]	1183	// Records the current state of all malloc internal bookkeeping variables (but not the actual contents of the heap
	1184	// or the state of malloc_hook functions pointers). The state is recorded in a system-dependent opaque data
	1185	// structure dynamically allocated via malloc, and a pointer to that data structure is returned as the function
	1186	// result. (The caller must free this memory.)
[c4f68dc]	1187	void * malloc_get_state( void ) {
[95eb7cf]	1188	return 0p; // unsupported
[c4f68dc]	1189	} // malloc_get_state
	1190
[bcb14b5]	1191
[ca7949b]	1192	// Restores the state of all malloc internal bookkeeping variables to the values recorded in the opaque data
	1193	// structure pointed to by state.
[c4f68dc]	1194	int malloc_set_state( void * ptr ) {
[bcb14b5]	1195	return 0; // unsupported
[c4f68dc]	1196	} // malloc_set_state
	1197	} // extern "C"
	1198
	1199
[95eb7cf]	1200	// Must have CFA linkage to overload with C linkage realloc.
[cfbc703d]	1201	void * resize( void * oaddr, size_t nalign, size_t size ) {
[1e034d9]	1202	#ifdef __STATISTICS__
[cfbc703d]	1203	__atomic_add_fetch( &resize_calls, 1, __ATOMIC_SEQ_CST );
	1204	__atomic_add_fetch( &resize_storage, size, __ATOMIC_SEQ_CST );
[1e034d9]	1205	#endif // __STATISTICS__
[95eb7cf]	1206
[1f6de372]	1207	// If size is equal to 0, either NULL or a pointer suitable to be passed to free() is returned.
[cfbc703d]	1208	if ( unlikely( size == 0 ) ) { free( oaddr ); return memalignNoStats( nalign, size ); } // special cases
	1209	if ( unlikely( oaddr == 0p ) ) return memalignNoStats( nalign, size );
	1210
[95eb7cf]	1211
[1e034d9]	1212	if ( unlikely( nalign == 0 ) ) nalign = libAlign(); // reset alignment to minimum
[95eb7cf]	1213	#ifdef __CFA_DEBUG__
[1e034d9]	1214	else
[95eb7cf]	1215	checkAlign( nalign ); // check alignment
	1216	#endif // __CFA_DEBUG__
	1217
[cfbc703d]	1218	HeapManager.Storage.Header * header;
	1219	HeapManager.FreeHeader * freeElem;
	1220	size_t bsize, oalign = 0;
	1221	headers( "resize", oaddr, header, freeElem, bsize, oalign );
	1222	size_t odsize = dataStorage( bsize, oaddr, header ); // data storage available in bucket
	1223
	1224	if ( oalign <= nalign && (uintptr_t)oaddr % nalign == 0 ) { // <= alignment and new alignment happens to match
	1225	if ( oalign >= libAlign() ) { // fake header ?
	1226	headerAddr( oaddr )->kind.fake.alignment = nalign \| 1; // update alignment (could be the same)
	1227	} // if
	1228	if ( size <= odsize && odsize <= size * 2 ) { // allow 50% wasted storage for smaller size
	1229	header->kind.real.blockSize &= -2; // turn off 0 fill
[2b23d78]	1230	if ( size != odsize ) header->kind.real.size = size; // reset allocation size
[cfbc703d]	1231	return oaddr;
	1232	} // if
	1233	} // if
	1234
	1235	// change size
	1236
	1237	void * naddr;
	1238	if ( unlikely( header->kind.real.blockSize & 2 ) ) { // previous request zero fill
	1239	naddr = cmemalignNoStats( nalign, 1, size ); // create new aligned area
	1240	} else {
	1241	naddr = memalignNoStats( nalign, size ); // create new aligned area
	1242	} // if
	1243
	1244	free( oaddr );
	1245	return naddr;
	1246	} // resize
	1247
	1248
	1249	void * realloc( void * oaddr, size_t nalign, size_t size ) {
	1250	if ( unlikely( nalign == 0 ) ) nalign = libAlign(); // reset alignment to minimum
	1251	#ifdef __CFA_DEBUG__
	1252	else
	1253	checkAlign( nalign ); // check alignment
	1254	#endif // __CFA_DEBUG__
	1255
[95eb7cf]	1256	HeapManager.Storage.Header * header;
	1257	HeapManager.FreeHeader * freeElem;
	1258	size_t bsize, oalign = 0;
	1259	headers( "realloc", oaddr, header, freeElem, bsize, oalign );
[1e034d9]	1260	size_t odsize = dataStorage( bsize, oaddr, header ); // data storage available in bucket
[95eb7cf]	1261
[cfbc703d]	1262	if ( oalign <= nalign && (uintptr_t)oaddr % nalign == 0 ) { // <= alignment and new alignment happens to match
	1263	if ( oalign >= libAlign() ) { // fake header ?
	1264	headerAddr( oaddr )->kind.fake.alignment = nalign \| 1; // update alignment (could be the same)
	1265	} // if
[95eb7cf]	1266	return realloc( oaddr, size );
[1e034d9]	1267	} // if
[95eb7cf]	1268
[cfbc703d]	1269	// change size and copy old content to new storage
	1270
[1e034d9]	1271	#ifdef __STATISTICS__
[cfbc703d]	1272	__atomic_add_fetch( &realloc_calls, 1, __ATOMIC_SEQ_CST );
[95eb7cf]	1273	__atomic_add_fetch( &realloc_storage, size, __ATOMIC_SEQ_CST );
[1e034d9]	1274	#endif // __STATISTICS__
	1275
[cfbc703d]	1276	// If size is equal to 0, either NULL or a pointer suitable to be passed to free() is returned.
	1277	if ( unlikely( size == 0 ) ) { free( oaddr ); return memalignNoStats( nalign, size ); } // special cases
	1278	if ( unlikely( oaddr == 0p ) ) return memalignNoStats( nalign, size );
[95eb7cf]	1279
[1e034d9]	1280	void * naddr;
	1281	if ( unlikely( header->kind.real.blockSize & 2 ) ) { // previous request zero fill
	1282	naddr = cmemalignNoStats( nalign, 1, size ); // create new aligned area
	1283	} else {
	1284	naddr = memalignNoStats( nalign, size ); // create new aligned area
	1285	} // if
[95eb7cf]	1286
[1e034d9]	1287	headers( "realloc", naddr, header, freeElem, bsize, oalign );
[cfbc703d]	1288	size_t ndsize = dataStorage( bsize, naddr, header ); // data storage available in bucket
[95eb7cf]	1289	// To preserve prior fill, the entire bucket must be copied versus the size.
[1e034d9]	1290	memcpy( naddr, oaddr, MIN( odsize, ndsize ) ); // copy bytes
	1291	free( oaddr );
	1292	return naddr;
[95eb7cf]	1293	} // realloc
	1294
	1295
[c4f68dc]	1296	// Local Variables: //
	1297	// tab-width: 4 //
[f8cd310]	1298	// compile-command: "cfa -nodebug -O2 heap.cfa" //
[c4f68dc]	1299	// End: //

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