зеркало из https://github.com/github/ruby.git
f8effa209a
Our current implementation of rb_postponed_job_register suffers from some safety issues that can lead to interpreter crashes (see bug #1991). Essentially, the issue is that jobs can be called with the wrong arguments. We made two attempts to fix this whilst keeping the promised semantics, but: * The first one involved masking/unmasking when flushing jobs, which was believed to be too expensive * The second one involved a lock-free, multi-producer, single-consumer ringbuffer, which was too complex The critical insight behind this third solution is that essentially the only user of these APIs are a) internal, or b) profiling gems. For a), none of the usages actually require variable data; they will work just fine with the preregistration interface. For b), generally profiling gems only call a single callback with a single piece of data (which is actually usually just zero) for the life of the program. The ringbuffer is complex because it needs to support multi-word inserts of job & data (which can't be atomic); but nobody actually even needs that functionality, really. So, this comit: * Introduces a pre-registration API for jobs, with a GVL-requiring rb_postponed_job_prereigster, which returns a handle which can be used with an async-signal-safe rb_postponed_job_trigger. * Deprecates rb_postponed_job_register (and re-implements it on top of the preregister function for compatability) * Moves all the internal usages of postponed job register pre-registration |
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| .. | ||
| lib | ||
| tools | ||
| README | ||
| depend | ||
| eventids2.c | ||
| eventids2.h | ||
| extconf.rb | ||
| ripper_init.c.tmpl | ||
| ripper_init.h | ||
README
Ripper README
=============
Ripper is a Ruby script parser. You can get information
by event-based style from the parser.
!! WARNING !!
Ripper is still early-alpha version.
I never assure any kind of backward compatibility.
Requirements
------------
* ruby 1.9 (support CVS HEAD only)
Usage
-----
See test/ripper/* and sample/ripper/*.
License
-------
Ruby License.
Minero Aoki
aamine@loveruby.net
http://i.loveruby.net