Support XiZi_AIoT

Ubiquitous/XiZi_AIoT/softkernel/include/object_allocator.h

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+/*
+ * Copyright (c) 2020 AIIT XUOS Lab
+ * XiUOS is licensed under Mulan PSL v2.
+ * You can use this software according to the terms and conditions of the Mulan PSL v2.
+ * You may obtain a copy of Mulan PSL v2 at:
+ *        http://license.coscl.org.cn/MulanPSL2
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PSL v2 for more details.
+ */
+/**
+ * @file object_allocator.h
+ * @brief slab algorithm declaration
+ * @version 3.0
+ * @author AIIT XUOS Lab
+ * @date 2023.08.25
+ */
+
+/*************************************************
+File name: object_allocator.h
+Description: slab algorithm declaration
+Others:
+History:
+1. Date: 2023-08-28
+Author: AIIT XUOS Lab
+Modification:
+1. first version
+*************************************************/
+#pragma once
+
+#include <stdint.h>
+
+struct slab_state {
+    struct slab_state *prev, *next;
+    uint64_t bitmap;
+    uintptr_t refcount;
+    uint8_t data[] __attribute__((aligned(sizeof(void*))));
+};
+
+struct slab_allocator {
+    size_t element_size;
+    size_t nr_elements;
+    size_t slabsize;
+    uint64_t bitmap_empty;
+    struct slab_state *partial, *empty, *full;
+};
+
+void slab_init(struct slab_allocator*, size_t);
+void slab_destroy(const struct slab_allocator*);
+
+void* slab_alloc(struct slab_allocator*);
+void slab_free(struct slab_allocator*, const void*);