Mercurial > molko
view src/libmlk-core/core/alloc.c @ 419:1b4e61bdb9ab
core: introduce err.h
author | David Demelier <markand@malikania.fr> |
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date | Wed, 12 Oct 2022 15:06:18 +0200 |
parents | 7321511052f6 |
children |
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/* * alloc.h -- custom allocators * * Copyright (c) 2020-2022 David Demelier <markand@malikania.fr> * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include <assert.h> #include <errno.h> #include <stdlib.h> #include <string.h> #include <SDL.h> #include "alloc.h" #include "buf.h" #include "error.h" #include "panic.h" static void * panic_alloc(size_t size) { void *mem; if (!(mem = malloc(size))) panicf("%s", strerror(errno)); return mem; } static void * panic_realloc(void *ptr, size_t size) { void *mem; if (!(mem = realloc(ptr, size)) && size != 0) panicf("%s", strerror(errno)); return mem; } static const struct alloc_funcs default_alloc_funcs = { .alloc = panic_alloc, .realloc = panic_realloc, .free = free }; static const struct alloc_funcs *funcs = &default_alloc_funcs; void alloc_set(const struct alloc_funcs *newfuncs) { assert(funcs); assert(funcs->alloc); assert(funcs->realloc); assert(funcs->free); funcs = newfuncs; /* Change SDL allocators as well. */ SDL_SetMemoryFunctions(alloc_new, alloc_array0, alloc_renew, free); } void * alloc_new(size_t size) { assert(size != 0); return funcs->alloc(size); } void * alloc_new0(size_t size) { assert(size != 0); return memset(funcs->alloc(size), 0, size); } void * alloc_array(size_t len, size_t elemsize) { assert(len != 0); assert(elemsize != 0); return funcs->alloc(len * elemsize); } void * alloc_array0(size_t len, size_t elemsize) { assert(len != 0); assert(elemsize != 0); return alloc_new0(len * elemsize); } void * alloc_renew(void *ptr, size_t size) { return funcs->realloc(ptr, size); } void * alloc_rearray(void *ptr, size_t len, size_t elemsize) { assert(elemsize != 0); return funcs->realloc(ptr, len * elemsize); } void * alloc_rearray0(void *ptr, size_t oldlen, size_t newlen, size_t elemsize) { ptr = funcs->realloc(ptr, newlen * elemsize); if (newlen > oldlen) memset((unsigned char *)ptr + (oldlen * elemsize), 0, (newlen - oldlen) * elemsize); return ptr; } void * alloc_dup(const void *ptr, size_t size) { assert(ptr); assert(size != 0); return memcpy(funcs->alloc(size), ptr, size); } char * alloc_sdup(const char *src) { assert(src); size_t len = strlen(src) + 1; return memcpy(funcs->alloc(len), src, len); } char * alloc_sdupf(const char *fmt, ...) { struct buf buf = {0}; va_list ap; va_start(ap, fmt); buf_vprintf(&buf, fmt, ap); va_end(ap); return buf.data; } void alloc_free(void *ptr) { funcs->free(ptr); } void alloc_pool_init(struct alloc_pool *pool, size_t elemsize, void (*finalizer)(void *)) { assert(pool); assert(elemsize != 0); pool->data = alloc_array(ALLOC_POOL_INIT_DEFAULT, elemsize); pool->elemsize = elemsize; pool->size = 0; pool->capacity = ALLOC_POOL_INIT_DEFAULT; pool->finalizer = finalizer; } void * alloc_pool_new(struct alloc_pool *pool) { assert(pool); if (pool->size >= pool->capacity) { pool->capacity *= 2; pool->data = alloc_rearray(pool->data, pool->capacity, pool->elemsize); } return ((unsigned char *)pool->data) + pool->size++ * pool->elemsize; } void * alloc_pool_get(const struct alloc_pool *pool, size_t index) { assert(pool); assert(index < pool->size); return ((unsigned char *)pool->data) + index * pool->elemsize; } void * alloc_pool_shrink(struct alloc_pool *pool) { assert(pool); void *ptr; ptr = alloc_rearray(pool->data, pool->size, pool->elemsize); memset(pool, 0, sizeof (*pool)); return ptr; } void alloc_pool_finish(struct alloc_pool *pool) { unsigned char *tab; if (!pool) return; if (pool->finalizer) { tab = pool->data; for (size_t i = 0; i < pool->size; ++i) pool->finalizer(tab + i * pool->elemsize); } free(pool->data); memset(pool, 0, sizeof (*pool)); }