From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=unavailable autolearn_force=no version=3.4.4 Path: eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!news.eternal-september.org!feeder.eternal-september.org!aioe.org!.POSTED!not-for-mail From: "Dmitry A. Kazakov" Newsgroups: comp.lang.ada Subject: Re: Task safe containers? Help needed. Date: Sun, 8 Oct 2017 08:57:14 +0200 Organization: Aioe.org NNTP Server Message-ID: References: NNTP-Posting-Host: MajGvm9MbNtGBKE7r8NgYA.user.gioia.aioe.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Complaints-To: abuse@aioe.org User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 X-Notice: Filtered by postfilter v. 0.8.2 Content-Language: en-US Xref: news.eternal-september.org comp.lang.ada:48395 Date: 2017-10-08T08:57:14+02:00 List-Id: On 2017-10-08 06:27, reinert wrote: > if I want to access a container (Vector, Set, Map) by several tasks > (updating and reading) - (hopefully) without loosing functionality of > the container. > > What should I do? 1. If operations are short and non-blocking put the container in a protected object and route operations trough object's ones. 2. If operations are long, unbounded, blocking (most of the cases): 2.a Use a mutex taken at the beginning of each operation and released at the end. 2.b Use monitor task owning the container. All operations are performed by the task from task's entries. -- Regards, Dmitry A. Kazakov http://www.dmitry-kazakov.de