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Intel Mac OS X 10.14; rv:68.0) Gecko/20100101 Thunderbird/68.11.0 MIME-Version: 1.0 In-Reply-To: <20200817223229.5401A4422E@lignose.oclsc.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Mirapoint-IP-Reputation: reputation=Good-1, source=Queried, refid=tid=0001.0A020302.5F3B05CF.0012, actions=tag X-Mirapoint-IP-Reputation: reputation=good-1, source=Fixed, refid=n/a, actions=tag X-Junkmail-Status: score=9/80, host=mpv2-2015.case.edu X-Junkmail-PrAS-Raw: score=9/80, refid=2.7.2:2020.8.17.220317:17:9.975, ip=, rules=__YOUTUBE_RCVD, DKIM_SIGNATURE, __X_GOOGLE_DKIM_SIGNATURE, __HAS_REPLYTO, __HAS_CC_HDR, __SUBJ_REPLY, __BOUNCE_CHALLENGE_SUBJ, __BOUNCE_NDR_SUBJ_EXEMPT, __SUBJ_ALPHA_END, __TO_MALFORMED_2, __MULTIPLE_RCPTS_TO_X2, __TO_NAME, __TO_NAME_DIFF_FROM_ACC, __HAS_REFERENCES, __REFERENCES, __HAS_FROM, FROM_EDU_TLD, __HAS_MSGID, __SANE_MSGID, DATE_TZ_NA, __USER_AGENT, __MOZILLA_USER_AGENT, __MIME_VERSION, __IN_REP_TO, __CT, __CT_TEXT_PLAIN, __CTE, __REPLYTO_SAMEAS_FROM_ADDY, __REPLYTO_SAMEAS_FROM_ACC, __FROM_DOMAIN_IN_ANY_CC1, __FROM_DOMAIN_IN_ANY_CC2, __TO_IN_SUBJECT2, __REPLYTO_SAMEAS_FROM_DOMAIN, __DKIM_ALIGNS_1, __DKIM_ALIGNS_2, __ANY_URI, __URI_MAILTO, __HTTPS_URI, __URI_WITH_PATH, __URI_ENDS_IN_SLASH, __CP_URI_IN_BODY, __SUBJ_ALPHA_NEGATE, __MULTIPLE_URI_TEXT, __URI_IN_BODY, __URI_NOT_IMG, __MAIL_CHAIN, __FORWARDED_MSG, __BODY_NO_MAILTO, __NO_HTML_TAG_RAW, [TRUNCATED], so=2010-03-03 19:42:08, dmn=2016-08-03-0138 Subject: Re: [TUHS] Memory management in Dennis Ritchie's C Compiler X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: chet.ramey@case.edu Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" On 8/17/20 6:32 PM, Norman Wilson wrote: > It's more than 15 years since I last looked at any > of this stuff, but I vaguely remember that lcc has > its own interesting (but ISO/POSIX-compatible) > memory-allocation setup. It allows several nested > contexts' worth of allocation, freeing an inner > context when there's no longer any need for it. > For example, once the compiler has finished with > a function and has no further need for its local > symbols, it frees the associated memory. Arenas. http://drhanson.s3.amazonaws.com/storage/documents/fastalloc.pdf I'm pretty sure this is the literate programming variant Fraser and Hanson used for the book: https://www.cs.tufts.edu/~nr/pubs/lpsimp.pdf -- ``The lyf so short, the craft so long to lerne.'' - Chaucer ``Ars longa, vita brevis'' - Hippocrates Chet Ramey, UTech, CWRU chet@case.edu http://tiswww.cwru.edu/~chet/