Re: Buddy System Memory Allocator

From	Paul Rubin <no.email@nospam.invalid>
Newsgroups	comp.lang.forth
Subject	Re: Buddy System Memory Allocator
References	(2 earlier) <WWpms.216705$Tf3.28710@fx12.am4> <1b12d69b-ae6e-4a1a-821a-1badbb0100ed@k6g2000vbr.googlegroups.com> <k7ev19$jgb$1@speranza.aioe.org> <7xhap0di7e.fsf@ruckus.brouhaha.com> <k7f0qf$mpt$1@speranza.aioe.org>
Date	2012-11-07 17:32 -0800
Message-ID	<7xa9us3mme.fsf@ruckus.brouhaha.com> (permalink)
Organization	Nightsong/Fort GNOX

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"Rod Pemberton" <do_not_have@notemailnotz.cnm> writes:
> It's my understanding from what I've read that coding an operating system in
> C++ is very difficult, primarily because of new and delete.  It's not
> difficult to code an OS in C.  I.e., they are not equivalent.

That makes no sense at all; lots of OS's are coded in C++, and C++ is
almost exactly a superset of C (that is, C programs can be compiled and
run under C++ with very little if any modification).  C++'s new and
delete operators give class instances instead of raw pointers, but in
the case of an OS you probably want some kind of block allocator even
lower level than malloc/free, so the difference between new and malloc
is irrelevant.

> I'll take it that you mean that new and delete are used in C++ for memory
> allocation, whereas malloc and free are used in C for memory allocation.

Yes.  You can still use malloc/free in C++ if you have to, though it
would be considered bad style unless you had a clear reason to do it.

Thread

[OT] Buddy System Memory Allocator "Mark" <mark@dibsco.co.uk> - 2012-11-04 20:10 +0000
  Re: Buddy System Memory Allocator Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-11-04 15:05 -0800
    Re: Buddy System Memory Allocator Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-11-04 22:02 -0800
      Re: Buddy System Memory Allocator "Mark" <mark@dibsco.co.uk> - 2012-11-10 12:53 +0000
        Re: Buddy System Memory Allocator "Rod Pemberton" <do_not_have@notemailnotz.cnm> - 2012-11-10 20:25 -0500
          Re: Buddy System Memory Allocator Josh Grams <josh@qualdan.com> - 2012-11-11 11:49 +0000
            Re: Buddy System Memory Allocator Bernd Paysan <bernd.paysan@gmx.de> - 2012-11-11 17:43 +0100
              Re: Buddy System Memory Allocator Josh Grams <josh@qualdan.com> - 2012-11-12 01:55 +0000
            Re: Buddy System Memory Allocator "Elizabeth D. Rather" <erather@forth.com> - 2012-11-11 07:06 -1000
    Re: Buddy System Memory Allocator Alex McDonald <blog@rivadpm.com> - 2012-11-05 06:33 -0800
    Re: Buddy System Memory Allocator "Mark" <mark@dibsco.co.uk> - 2012-11-10 12:05 +0000
      Re: Buddy System Memory Allocator Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-11-13 19:49 -0800
  Re: [OT] Buddy System Memory Allocator Paul Rubin <no.email@nospam.invalid> - 2012-11-04 16:55 -0800
    Re: Buddy System Memory Allocator Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-11-04 19:08 -0800
    Re: [OT] Buddy System Memory Allocator "Mark" <mark@dibsco.co.uk> - 2012-11-07 08:49 +0000
  Re: [OT] Buddy System Memory Allocator Ron Aaron <rambamist@gmail.com> - 2012-11-05 08:17 +0200
    Re: [OT] Buddy System Memory Allocator "Mark" <mark@dibsco.co.uk> - 2012-11-07 09:02 +0000
  Re: [OT] Buddy System Memory Allocator "Rod Pemberton" <do_not_have@notemailnotz.cnm> - 2012-11-05 14:10 -0500
    Re: Buddy System Memory Allocator Alex McDonald <blog@rivadpm.com> - 2012-11-05 12:58 -0800
      Re: Buddy System Memory Allocator "Rod Pemberton" <do_not_have@notemailnotz.cnm> - 2012-11-06 20:54 -0500
        Re: Buddy System Memory Allocator Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-11-06 21:50 -0800
          Re: Buddy System Memory Allocator "Mark" <mark@dibsco.co.uk> - 2012-11-07 08:36 +0000
          Re: Buddy System Memory Allocator "Rod Pemberton" <do_not_have@notemailnotz.cnm> - 2012-11-07 19:49 -0500
            Re: Buddy System Memory Allocator Alex McDonald <blog@rivadpm.com> - 2012-11-08 04:42 -0800
            Re: Buddy System Memory Allocator Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-11-08 19:43 -0800
              Re: Buddy System Memory Allocator albert@spenarnc.xs4all.nl (Albert van der Horst) - 2012-11-09 10:48 +0000
              Re: Buddy System Memory Allocator Bernd Paysan <bernd.paysan@gmx.de> - 2012-11-09 22:15 +0100
        Re: Buddy System Memory Allocator Alex McDonald <blog@rivadpm.com> - 2012-11-07 12:46 -0800
      Re: Buddy System Memory Allocator "Mark" <mark@dibsco.co.uk> - 2012-11-10 13:09 +0000
        Re: Buddy System Memory Allocator Alex McDonald <blog@rivadpm.com> - 2012-11-10 07:43 -0800
    Re: [OT] Buddy System Memory Allocator "Mark" <mark@dibsco.co.uk> - 2012-11-07 09:34 +0000
      Re: Buddy System Memory Allocator Mark Wills <forthfreak@gmail.com> - 2012-11-07 04:07 -0800
        Re: Buddy System Memory Allocator "Rod Pemberton" <do_not_have@notemailnotz.cnm> - 2012-11-07 19:44 -0500
          Re: Buddy System Memory Allocator Paul Rubin <no.email@nospam.invalid> - 2012-11-07 16:57 -0800
            Re: Buddy System Memory Allocator "Rod Pemberton" <do_not_have@notemailnotz.cnm> - 2012-11-07 20:14 -0500
              Re: Buddy System Memory Allocator Paul Rubin <no.email@nospam.invalid> - 2012-11-07 17:32 -0800
                Re: Buddy System Memory Allocator anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-11-08 12:32 +0000
                Re: Buddy System Memory Allocator Paul Rubin <no.email@nospam.invalid> - 2012-11-08 20:00 -0800
                Re: Buddy System Memory Allocator "Rod Pemberton" <do_not_have@notemailnotz.cnm> - 2012-11-09 02:20 -0500
                Re: Buddy System Memory Allocator Paul Rubin <no.email@nospam.invalid> - 2012-11-09 00:53 -0800
                Re: Buddy System Memory Allocator "Rod Pemberton" <do_not_have@notemailnotz.cnm> - 2012-11-09 19:10 -0500
                Re: Buddy System Memory Allocator Paul Rubin <no.email@nospam.invalid> - 2012-11-09 18:47 -0800
                Re: Buddy System Memory Allocator "Rod Pemberton" <do_not_have@notemailnotz.cnm> - 2012-11-10 02:16 -0500
                Re: Buddy System Memory Allocator "Elizabeth D. Rather" <erather@forth.com> - 2012-11-09 17:51 -1000
                Re: Buddy System Memory Allocator Mark Wills <forthfreak@gmail.com> - 2012-11-09 22:51 -0800
                Re: Buddy System Memory Allocator "Rod Pemberton" <do_not_have@notemailnotz.cnm> - 2012-11-10 02:26 -0500
                Re: Buddy System Memory Allocator "Elizabeth D. Rather" <erather@forth.com> - 2012-11-09 22:01 -1000
                Re: Buddy System Memory Allocator Mark Wills <forthfreak@gmail.com> - 2012-11-09 22:49 -0800
                Re: Buddy System Memory Allocator "Rod Pemberton" <do_not_have@notemailnotz.cnm> - 2012-11-10 02:15 -0500
                Re: Buddy System Memory Allocator Mark Wills <forthfreak@gmail.com> - 2012-11-09 22:57 -0800
            Re: Buddy System Memory Allocator Mark Wills <forthfreak@gmail.com> - 2012-11-08 00:22 -0800
        Re: Buddy System Memory Allocator "Mark" <mark@dibsco.co.uk> - 2012-11-10 13:43 +0000
  Re: [OT] Buddy System Memory Allocator Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-07 13:10 +0000
    Re: [OT] Buddy System Memory Allocator Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-07 13:31 +0000
  Re: [OT] Buddy System Memory Allocator Charles Mélice <charles.melice@gmail.com> - 2012-11-11 05:29 -0800

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