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Issue #8568 has been updated by nobu (Nobuyoshi Nakada).
File sizeof.diff added
akr (Akira Tanaka) wrote:
> Although "word" is ambiguous, providing sizeof(long), sizeof(char*),
> etc. via RbConfig
> with clear names seems good feature:
> RbConfig["sizeof(long)"], RbConfig["sieof(char*)"],
> RbConfig["sizeof(time_t)"], ...
RbConfig is a module, so `RbConfig.[]` doesn't seem good.
What about `RbConfig::SIZEOF` instead?
----------------------------------------
Feature #8568: Introduce RbConfig value for native word size, to avoid Fixnum#size use
https://bugs.ruby-lang.org/issues/8568#change-40268
Author: headius (Charles Nutter)
Status: Open
Priority: Normal
Assignee:
Category:
Target version:
Fixnum#size is not really useful to represent native word size across all platforms and implementations. On JRuby, for example, our Fixnum is always represented as a 64-bit Java "long" value, regardless of the underlying native platform. There may be other implementations that fix Fixnum's size to a specific bit width as well. Therefore, using Fixnum#size to determine the size of a word on the underlying native platform is not reliable.
I propose two additions to Ruby:
1. RbConfig value "word_size" for native word size. This could reflect bit size (32, 64) or byte size (4, 8).
2. A constant, somewhere in Ruby, to provide access to this value more directly. I'm not sure where this should go. ObjectSpace::WORD_SIZE?
--
http://bugs.ruby-lang.org/