From ff0be98bad9549eeb06355e848bd868c792203a5 Mon Sep 17 00:00:00 2001
From: Florian Fischer <florian.fl.fischer@fau.de>
Date: Wed, 26 Feb 2020 16:19:57 +0100
Subject: externalize speedymalloc

---
 src/speedymalloc.c | 171 -----------------------------------------------------
 1 file changed, 171 deletions(-)
 delete mode 100644 src/speedymalloc.c

(limited to 'src/speedymalloc.c')

diff --git a/src/speedymalloc.c b/src/speedymalloc.c
deleted file mode 100644
index 7df3c5a..0000000
--- a/src/speedymalloc.c
+++ /dev/null
@@ -1,171 +0,0 @@
-#include <assert.h>
-#include <errno.h>
-#include <stddef.h> /* NULL, size_t */
-#include <stdint.h> /* uintptr_t */
-#include <stdio.h> /* fprintf */
-#include <stdlib.h> /* exit */
-#include <unistd.h> /* sysconf(_SC_PAGESIZE) */
-#include <string.h> /* memset */
-#include <sys/mman.h> /* mmap */
-
-#define MIN_ALIGNMENT 16
-
-#ifndef MEMSIZE
-#define MEMSIZE 1024*4*1024*1024l
-#endif
-
-#ifndef NO_WILLNEED
-#define WILLNEED_SIZE 32 * 1024 * 1024
-#endif
-
-// sizeof(tls_t) == 4096
-#define CACHE_BINS 511
-// max cached object: 511 * 64 - 1 = 32703
-#define CACHE_BIN_SEPERATION 64
-
-#define unlikely(x)     __builtin_expect((x),0)
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-
-typedef struct chunk {
-	size_t size; // Size header field for internal use
-	struct chunk* next;
-} chunk_t;
-
-static inline chunk_t* ptr2chunk(void* ptr) {
-	return (chunk_t*)((uintptr_t)ptr - sizeof(size_t));
-}
-
-static inline void* chunk2ptr (chunk_t* chunk) {
-	return (void*)((uintptr_t)chunk + sizeof(size_t));
-}
-
-typedef struct TLStates {
-	uintptr_t ptr;
-	chunk_t* bins[CACHE_BINS];
-} tls_t;
-
-__thread tls_t* tls;
-__thread uintptr_t next_willneed;
-
-static inline int size2bin(size_t size) {
-	assert(size > 0 && size < CACHE_BINS * CACHE_BIN_SEPERATION);
-	return (size - 1) / CACHE_BIN_SEPERATION;
-}
-
-static inline size_t bin2size(int bin) {
-	assert(bin >= 0 && bin < CACHE_BINS);
-	return (bin + 1) * CACHE_BIN_SEPERATION;
-}
-
-static void init_tls(void) {
-	void *mem = mmap(NULL, MEMSIZE, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
-	if (mem == MAP_FAILED) {
-		perror("mmap");
-		exit(1);
-	}
-	tls = (tls_t*)mem;
-
-	tls->ptr = ((uintptr_t)tls) + sizeof(tls_t);
-#ifndef NO_WILLNEED
-	next_willneed = tls->ptr;
-#endif
-}
-
-static void* bump_alloc(size_t size) {
-	// allocate size header
-	tls->ptr += sizeof(size_t);
-
-	// align ptr
-	size_t mask = MIN_ALIGNMENT -1;
-	tls->ptr = (tls->ptr + mask) & ~mask;
-
-#ifndef NO_WILLNEED
-	if(unlikely(tls->ptr >= next_willneed)) {
-		if (madvise((void*)next_willneed, WILLNEED_SIZE, MADV_WILLNEED) != 0) {
-			perror("madvice");
-		}
-		next_willneed += WILLNEED_SIZE;
-	}
-#endif
-
-	void* ptr = (void*)tls->ptr;
-	ptr2chunk(ptr)->size = size;
-	tls->ptr += size;
-
-	return ptr;
-}
-
-void* malloc(size_t size) {
-	if (unlikely(tls == NULL)) {
-		init_tls();
-	}
-
-	// cached sizes
-	if (size < CACHE_BINS * CACHE_BIN_SEPERATION) {
-		int bin = size2bin(size);
-		if (tls->bins[bin] != NULL) {
-			chunk_t* chunk = tls->bins[bin];
-			// remove first chunk from list
-			tls->bins[bin] = chunk->next;
-			return chunk2ptr(chunk);
-		}
-		return bump_alloc(bin2size(bin));
-	}
-
-	return bump_alloc(size);
-}
-
-void free(void* ptr) {
-	if (unlikely(tls == NULL)) {
-		init_tls();
-	}
-
-	if (ptr == NULL) {
-		return;
-	}
-
-	chunk_t* chunk = ptr2chunk(ptr);
-
-	if (chunk->size < CACHE_BINS * CACHE_BIN_SEPERATION) {
-		int bin = size2bin(chunk->size);
-		chunk->next = tls->bins[bin];
-		tls->bins[bin] = chunk;
-	}
-}
-
-void* memalign(size_t alignment, size_t size) {
-	/* if not power of two */
-	if (!((alignment != 0) && !(alignment & (alignment - 1)))) {
-		return NULL;
-	}
-
-	if (unlikely(tls == NULL)) {
-		init_tls();
-	}
-
-	// allocate size header
-	tls->ptr += sizeof(size_t);
-
-	// align returned pointer
-	size_t mask = alignment - 1;
-	tls->ptr = (tls->ptr + mask) & ~mask;
-
-	void* ptr = (void*)tls->ptr;
-	ptr2chunk(ptr)->size = size;
-	tls->ptr += size;
-
-	return ptr;
-}
-
-void malloc_stats() {
-	fprintf(stderr, "speedymalloc allocator by muhq\n");
-	fprintf(stderr, "Memsize: %zu, start address: %p, bump pointer %p\n", MEMSIZE, tls, tls->ptr);
-}
-
-#ifdef __cplusplus
-}
-#endif
-- 
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