jlaitine commented on code in PR #8026: URL: https://github.com/apache/nuttx/pull/8026#discussion_r1063585176
########## mm/map/mm_map.c: ########## @@ -0,0 +1,327 @@ +/**************************************************************************** + * mm/map/mm_map.c + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. The + * ASF licenses this file to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance with the + * License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT + * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the + * License for the specific language governing permissions and limitations + * under the License. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/mm/map.h> +#include <stdbool.h> +#include <stddef.h> +#include <nuttx/sched.h> +#include <nuttx/kmalloc.h> +#include <assert.h> + +#if defined(CONFIG_BUILD_FLAT) || defined(__KERNEL__) + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +static bool in_range(FAR const void *start, size_t length, + FAR const void *range_start, size_t range_length) +{ + char *u_start = (char *)start; + char *u_end = u_start + length; + char *r_start = (char *)range_start; + char *r_end = r_start + range_length; + + return (u_start >= r_start && u_start < r_end && /* start is in range */ + u_end >= r_start && u_end <= r_end); /* end is in range */ +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: mm_map_lock + * + * Description: + * Get exclusive access to task_group's mm_map + * + ****************************************************************************/ + +int mm_map_lock(void) +{ + return nxrmutex_lock(&nxsched_self()->group->tg_mm_map.mm_map_mutex); +} + +/**************************************************************************** + * Name: mm_map_unlock + * + * Description: + * Relinquish exclusive access to task_group's mm_map + * + ****************************************************************************/ + +void mm_map_unlock(void) +{ + DEBUGVERIFY( + nxrmutex_unlock(&nxsched_self()->group->tg_mm_map.mm_map_mutex) + ); +} + +/**************************************************************************** + * Name: mm_map_initialize + * + * Description: + * Allocates a task group specific mm_map stucture. Called when the group + * is initialized + * + ****************************************************************************/ + +void mm_map_initialize(FAR struct mm_map_s *mm) Review Comment: Initializing and destroying the map is correct I think. Only the mm_map_s structure is passed, which is the one to initialize (in task group creation) and destroyed (in task group destruction, process exit) The only question is that how you pass the info about task exit case to driver's unmap (from the mm_map_destroy). You can either have the logic in every driver, conditionally calling mm_map_remove only in normal case(not during group destruction) OR forwarding this info to mm_map_remove. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@nuttx.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
