[svlug] Embedded C++
kwanrj02 at lightsaber.com
Tue Sep 16 08:22:43 PDT 2003
I had a discussion with an embedded systems developer about
strengths and weaknesses of C, C++, Ada, and Java in an
embedded environment. He made the following observations:
1. Many embedded programmer don't like C++ new and delete because
they lose control over exactly how things are allocated or reused.
Apparantly, these are not conducive to real-time predictability.
2. Microsoft C++ allows explicit call of a constructor on an
but GNU G++ does not. In the MS environment, this allows
re-initialization of existing object without re-allocating memory.
It is unclear if the C++ standard really allows this.
Just to set this in context, in our target environment,
* memory and power consumption are often at a premium,
* systems must be highly reliable (no reboot for months),
* systems are increasingly autonomous (more forward before
receiving directions from home base).
(You guessed right; this is not a consumer appliance.)
Any other embedded folks out there?
Do you avoid new/delete in C++?
Do you avoid C++ altogether?
--Rick Kwan (kwanrj02 at lightsaber.com)
occasional embedded developer
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