--- a/src/basic_mempool.c Wed Jun 28 19:18:01 2023 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,235 +0,0 @@
-/*
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
- *
- * Copyright 2021 Mike Becker, Olaf Wintermann All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "cx/basic_mempool.h"
-#include "cx/utils.h"
-#include <string.h>
-
-#define of_chk_(n) if (SIZE_MAX - sizeof(cx_destructor_func) < (n)) return NULL
-
-/** Internal structure for denoting pooled memory. */
-typedef struct {
- /** The destructor. */
- cx_destructor_func destructor;
- /**
- * Access to the first byte of the polled memory.
- */
- char c;
-} cx_basic_mempool_memory;
-
-static int cx_basic_mempool_chcap(
- struct cx_basic_mempool_s *pool,
- size_t newcap
-) {
- if (newcap < pool->ndata) {
- return 1;
- }
-
- size_t newcapsz;
- if (cx_szmul(newcap, sizeof(void *), &newcapsz)) {
- return 1;
- }
-
- void **data = realloc(pool->data, newcapsz);
- if (data) {
- pool->data = data;
- pool->size = newcap;
- return 0;
- } else {
- return 1;
- }
-}
-
-void *cx_malloc_basic_mempool(
- void *data,
- size_t n
-) {
- of_chk_(n);
- struct cx_basic_mempool_s *pool = data;
-
- if (pool->ndata >= pool->size) {
- size_t newcap = pool->size * 2;
- if (newcap < pool->size || cx_basic_mempool_chcap(pool, newcap)) {
- return NULL;
- }
- }
-
- cx_basic_mempool_memory *mem = malloc(sizeof(cx_destructor_func) + n);
- if (mem == NULL) {
- return NULL;
- }
-
- mem->destructor = NULL;
- pool->data[pool->ndata] = mem;
- pool->ndata++;
-
- return &(mem->c);
-}
-
-void *cx_calloc_basic_mempool(
- void *data,
- size_t nelem,
- size_t elsize
-) {
- size_t msz;
- if (cx_szmul(nelem, elsize, &msz)) {
- return NULL;
- }
- void *ptr = cx_malloc_basic_mempool(data, msz);
- if (ptr == NULL) {
- return NULL;
- }
- memset(ptr, 0, nelem * elsize);
- return ptr;
-}
-
-void *cx_realloc_basic_mempool(
- void *data,
- void *ptr,
- size_t n
-) {
- of_chk_(n);
- struct cx_basic_mempool_s *pool = data;
-
- char *mem = ((char *) ptr) - sizeof(cx_destructor_func);
- char *newm = (char *) realloc(mem, n + sizeof(cx_destructor_func));
- if (newm == NULL) {
- return NULL;
- }
- if (mem != newm) {
- cx_for_n(i, pool->ndata) {
- if (pool->data[i] == mem) {
- pool->data[i] = newm;
- return newm + sizeof(cx_destructor_func);
- }
- }
- abort();
- } else {
- return newm + sizeof(cx_destructor_func);
- }
-}
-
-void cx_free_basic_mempool(
- void *data,
- void *ptr
-) {
- struct cx_basic_mempool_s *pool = data;
-
- cx_basic_mempool_memory *mem = (cx_basic_mempool_memory *)
- ((char *) ptr - sizeof(cx_destructor_func));
- cx_for_n(i, pool->ndata) {
- if (mem == pool->data[i]) {
- if (mem->destructor != NULL) {
- mem->destructor(&(mem->c));
- }
- free(mem);
- size_t last_index = pool->ndata - 1;
- if (i != last_index) {
- pool->data[i] = pool->data[last_index];
- pool->data[last_index] = NULL;
- }
- pool->ndata--;
- return;
- }
- }
- abort();
-}
-
-void cx_basic_mempool_destroy(CxMempool *p) {
- struct cx_basic_mempool_s *pool = (struct cx_basic_mempool_s *) p;
- cx_basic_mempool_memory *mem;
- cx_for_n(i, pool->ndata) {
- mem = (cx_basic_mempool_memory *) pool->data[i];
- if (mem) {
- if (mem->destructor) {
- mem->destructor(&(mem->c));
- }
- free(mem);
- }
- }
- free(pool->data);
- free((void *) p->allocator);
- free(pool);
-}
-
-void cx_basic_mempool_set_destr(
- __attribute__((__unused__)) CxMempool *pool,
- void *ptr,
- cx_destructor_func func
-) {
- *(cx_destructor_func *) ((char *) ptr - sizeof(cx_destructor_func)) = func;
-}
-
-static cx_allocator_class cx_basic_mempool_allocator_class = {
- cx_malloc_basic_mempool,
- cx_realloc_basic_mempool,
- cx_calloc_basic_mempool,
- cx_free_basic_mempool
-};
-
-static cx_mempool_class cx_basic_mempool_class = {
- cx_basic_mempool_destroy,
- cx_basic_mempool_set_destr,
-};
-
-CxMempool *cxBasicMempoolCreate(size_t capacity) {
- size_t poolsize;
- if (cx_szmul(capacity, sizeof(void *), &poolsize)) {
- return NULL;
- }
-
- struct cx_basic_mempool_s *pool =
- malloc(sizeof(struct cx_basic_mempool_s));
- if (pool == NULL) {
- return NULL;
- }
-
-
- CxAllocator *provided_allocator = malloc(sizeof(CxAllocator));
- if (!provided_allocator) {
- free(pool);
- return NULL;
- }
- provided_allocator->cl = &cx_basic_mempool_allocator_class;
- provided_allocator->data = pool;
-
- pool->base.cl = &cx_basic_mempool_class;
- pool->base.allocator = provided_allocator;
-
- pool->data = malloc(poolsize);
- if (pool->data == NULL) {
- free(provided_allocator);
- free(pool);
- return NULL;
- }
-
- pool->ndata = 0;
- pool->size = capacity;
-
- return (CxMempool *) pool;
-}