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The Ruby Programming Language [mirror]
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What's the problem? autoload is thread unsafe. When we define a constant to be autoloaded, we expect the constant construction is invariant. But current autoload implementation allows other threads to access the constant while the first thread is loading a file. What's happening inside? The current implementation uses Qundef as a marker of autoload in Constant table. Once the first thread find Qundef as a value at constant lookup, it starts loading a defined feature. Generally a loaded file overrides the Qundef in Constant table by module/class declaration at very beginning lines of the file, so other threads can see the new Module/Class object before feature loading is finished. It breaks invariant construction. How to solve? To ensure invariant constant construction, we need to override Qundef with defined Object after the feature loading. For keeping Qundef in Constant table, I expanded autoload_data struct in Module to have a slot for keeping the defined object while feature loading. And changed Module's constant lookup/update logic a little so that the slot is only visible from the thread which invokes feature loading. (== the first thread which accessed the autoload constant) Evaluation? All test passes (bootstrap test, test-all and RubySpec) and added 8 tests for threading behavior. Extra logics are executed only when Qundef is found, so no perf drop should happen except autoloading. * variable.c (rb_autoload): Prepare new autoload_data struct. * variable.c (rb_autoload_load): Load feature and update Constant table after feature loading is finished. * variable.c (rb_const_get_0): When the fetched constant is under autoloading, it returns the object only for the thread which starts autoloading. * variable.c (rb_const_defined_0): Ditto. * variable.c (rb_const_set): When the specified constant is under autoloading, it sets the object only for the thread which starts autoloading. Otherwise, simply overrides Qundef with constant override warning. * vm_insnhelper.c (vm_get_ev_const): Apply same change as rb_const_get_0 in variable.c. * test/ruby/test_autoload.rb: Added tests for threading behavior. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33078 b2dd03c8-39d4-4d8f-98ff-823fe69b080e |
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bcc32 | ||
benchmark | ||
bin | ||
bootstraptest | ||
cygwin | ||
defs | ||
doc | ||
enc | ||
ext | ||
include | ||
lib | ||
man | ||
misc | ||
missing | ||
sample | ||
spec | ||
symbian | ||
template | ||
test | ||
tool | ||
win32 | ||
.document | ||
.gdbinit | ||
.gitignore | ||
.indent.pro | ||
addr2line.c | ||
addr2line.h | ||
array.c | ||
atomic.h | ||
bignum.c | ||
BSDL | ||
ChangeLog | ||
class.c | ||
common.mk | ||
compar.c | ||
compile.c | ||
complex.c | ||
configure.in | ||
constant.h | ||
cont.c | ||
COPYING | ||
COPYING.ja | ||
debug.c | ||
debug.h | ||
dir.c | ||
dln.c | ||
dln.h | ||
dln_find.c | ||
dmydln.c | ||
dmyencoding.c | ||
dmyext.c | ||
dmyversion.c | ||
encoding.c | ||
enum.c | ||
enumerator.c | ||
error.c | ||
eval.c | ||
eval_error.c | ||
eval_intern.h | ||
eval_jump.c | ||
file.c | ||
gc.c | ||
gc.h | ||
gem_prelude.rb | ||
golf_prelude.rb | ||
goruby.c | ||
GPL | ||
hash.c | ||
ia64.s | ||
id.c | ||
inits.c | ||
insns.def | ||
internal.h | ||
io.c | ||
iseq.c | ||
iseq.h | ||
KNOWNBUGS.rb | ||
LEGAL | ||
lex.c.blt | ||
load.c | ||
main.c | ||
Makefile.in | ||
marshal.c | ||
math.c | ||
method.h | ||
NEWS | ||
node.c | ||
node.h | ||
numeric.c | ||
object.c | ||
pack.c | ||
parse.y | ||
prelude.rb | ||
proc.c | ||
process.c | ||
random.c | ||
range.c | ||
rational.c | ||
re.c | ||
README | ||
README.EXT | ||
README.EXT.ja | ||
README.ja | ||
regcomp.c | ||
regenc.c | ||
regenc.h | ||
regerror.c | ||
regexec.c | ||
regint.h | ||
regparse.c | ||
regparse.h | ||
regsyntax.c | ||
ruby.c | ||
safe.c | ||
signal.c | ||
sprintf.c | ||
st.c | ||
strftime.c | ||
string.c | ||
struct.c | ||
thread.c | ||
thread_pthread.c | ||
thread_pthread.h | ||
thread_win32.c | ||
thread_win32.h | ||
time.c | ||
timev.h | ||
transcode.c | ||
transcode_data.h | ||
util.c | ||
variable.c | ||
version.c | ||
version.h | ||
vm.c | ||
vm_core.h | ||
vm_dump.c | ||
vm_eval.c | ||
vm_exec.c | ||
vm_exec.h | ||
vm_insnhelper.c | ||
vm_insnhelper.h | ||
vm_method.c | ||
vm_opts.h | ||
vsnprintf.c |
* What's Ruby Ruby is the interpreted scripting language for quick and easy object-oriented programming. It has many features to process text files and to do system management tasks (as in Perl). It is simple, straight-forward, and extensible. * Features of Ruby + Simple Syntax + *Normal* Object-Oriented features(ex. class, method calls) + *Advanced* Object-Oriented features(ex. Mix-in, Singleton-method) + Operator Overloading + Exception Handling + Iterators and Closures + Garbage Collection + Dynamic Loading of Object files(on some architecture) + Highly Portable (works on many Unix-like/POSIX compatible platforms as well as Windows, Mac OS X, BeOS etc.) cf. http://redmine.ruby-lang.org/wiki/ruby-19/SupportedPlatforms * How to get Ruby The Ruby distribution files can be found in the following FTP site: ftp://ftp.ruby-lang.org/pub/ruby/ The trunk of the Ruby source tree can be checked out with the following command: $ svn co http://svn.ruby-lang.org/repos/ruby/trunk/ ruby There are some other branches under development. Try the following command and see the list of branches: $ svn ls http://svn.ruby-lang.org/repos/ruby/branches/ * Ruby home-page The URL of the Ruby home-page is: http://www.ruby-lang.org/ * Mailing list There is a mailing list to talk about Ruby. To subscribe this list, please send the following phrase subscribe YourFirstName YourFamilyName e.g. subscribe Joseph Smith in the mail body (not subject) to the address <ruby-talk-ctl@ruby-lang.org>. * How to compile and install This is what you need to do to compile and install Ruby: 1. If ./configure does not exist or is older than configure.in, run autoconf to (re)generate configure. 2. Run ./configure, which will generate config.h and Makefile. Some C compiler flags may be added by default depending on your environment. Specify optflags=.. and warnflags=.. as necessary to override them. 3. Edit defines.h if you need. Usually this step will not be needed. 4. Remove comment mark(#) before the module names from ext/Setup (or add module names if not present), if you want to link modules statically. If you don't want to compile non static extension modules (probably on architectures which does not allow dynamic loading), remove comment mark from the line "#option nodynamic" in ext/Setup. 5. Run make. 6. Optionally, run 'make test' to check whether the compiled Ruby interpreter works well. If you see the message "test succeeded", your ruby works as it should (hopefully). 7. Run 'make install' This command will create following directories and install files onto them. * ${DESTDIR}${prefix}/bin * ${DESTDIR}${prefix}/include/ruby-${MAJOR}.${MINOR}.${TEENY} * ${DESTDIR}${prefix}/include/ruby-${MAJOR}.${MINOR}.${TEENY}/${PLATFORM} * ${DESTDIR}${prefix}/lib * ${DESTDIR}${prefix}/lib/ruby * ${DESTDIR}${prefix}/lib/ruby/${MAJOR}.${MINOR}.${TEENY} * ${DESTDIR}${prefix}/lib/ruby/${MAJOR}.${MINOR}.${TEENY}/${PLATFORM} * ${DESTDIR}${prefix}/lib/ruby/site_ruby * ${DESTDIR}${prefix}/lib/ruby/site_ruby/${MAJOR}.${MINOR}.${TEENY} * ${DESTDIR}${prefix}/lib/ruby/site_ruby/${MAJOR}.${MINOR}.${TEENY}/${PLATFORM} * ${DESTDIR}${prefix}/lib/ruby/vendor_ruby * ${DESTDIR}${prefix}/lib/ruby/vendor_ruby/${MAJOR}.${MINOR}.${TEENY} * ${DESTDIR}${prefix}/lib/ruby/vendor_ruby/${MAJOR}.${MINOR}.${TEENY}/${PLATFORM} * ${DESTDIR}${prefix}/lib/ruby/gems/${MAJOR}.${MINOR}.${TEENY} * ${DESTDIR}${prefix}/share/man/man1 * ${DESTDIR}${prefix}/share/ri/${MAJOR}.${MINOR}.${TEENY}/system If Ruby's API version is `x.y.z', the ((|${MAJOR}|)) is `x', the ((|${MINOR}|)) is `y', and the ((|${TEENY}|)) is `z'. NOTE: teeny of the API version may be different from one of Ruby's program version You may have to be a super user to install ruby. If you fail to compile ruby, please send the detailed error report with the error log and machine/OS type, to help others. * Copying See the file COPYING. * The Author Feel free to send comments and bug reports to the author. Here is the author's latest mail address: matz@netlab.jp ------------------------------------------------------- created at: Thu Aug 3 11:57:36 JST 1995 Local variables: mode: indented-text end: