/** Memory allocators. * * @file * @author Steffen Vogel * @copyright 2014-2020, Institute for Automation of Complex Power Systems, EONERC * @license GNU General Public License (version 3) * * VILLASnode * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . *********************************************************************************/ #pragma once #include #include #include #include /* Forward declarations */ struct vnode; /** Descriptor of a memory block. Associated block always starts at * &m + sizeof(struct memory_block). */ struct memory_block { struct memory_block *prev; struct memory_block *next; size_t length; /**< Length of the block; doesn't include the descriptor itself */ bool used; }; /** @todo Unused for now */ struct memory_allocation { struct memory_type *type; struct memory_allocation *parent; void *address; size_t alignment; size_t length; union { #ifdef IBVERBS_FOUND struct { struct ibv_mr *mr; } ib; #endif struct { struct memory_block *block; } managed; }; }; /** Initilialize memory subsystem */ int memory_init(int hugepages) __attribute__ ((warn_unused_result)); int memory_lock(size_t lock); /** Allocate \p len bytes memory of type \p m. * * @retval nullptr If allocation failed. * @retval <>0 If allocation was successful. */ void * memory_alloc(size_t len, struct memory_type *m = memory_default); void * memory_alloc_aligned(size_t len, size_t alignment, struct memory_type *m = memory_default); int memory_free(void *ptr); struct memory_allocation * memory_get_allocation(void *ptr);