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* time.c (time_plus): must detect result overflow.

Browse source 
* time.c (time_minus): ditto.

* time.c (time_new_internal): round usec overflow and underflow
  here.

* time.c (time_plus): move operand overflow/underflow check to
  time_new_internal().

* time.c (time_minus): ditto.

* time.c (time_cmp): should consider tv_usec too.

* time.c (time_gmtime): time_modify() should be called even if tm
  struct is not calculated yet.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@1880 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
matz 2001-12-03 10:07:48 +00:00
parent 9e8553e5cc
commit b3144a7a0e
3 changed files with 117 additions and 77 deletions
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110
lib/singleton.rb
View file

@ -44,60 +44,64 @@
# of a previous state of ``the instance'' - see third example.
#
module Singleton
def Singleton.included (klass)
# should this be checked?
# raise TypeError.new "..." if klass.type == Module
class << klass
def inherited(sub_klass)
# @__instance__ takes on one of the following values
# * nil - before (and after a failed) creation
# * false - during creation
# * sub_class instance - after a successful creation
sub_klass.instance_eval { @__instance__ = nil }
def sub_klass.instance
unless @__instance__.nil?
# is the extra flexiblity having the hook method
# _wait() around ever useful?
_wait()
# check for instance creation
return @__instance__ if @__instance__
end
Thread.critical = true
unless @__instance__
@__instance__ = false
Thread.critical = false
begin
@__instance__ = new
ensure
if @__instance__
define_method(:instance) {@__instance__ }
else
# failed instance creation
@__instance__ = nil
end
end
else
Thread.critical = false
end
return @__instance__
end
end
def _load(str)
instance
end
def _wait
sleep(0.05) while false.equal?(@__instance__)
end
private :new, :allocate
# hook methods are also marked private
private :_load,:_wait
end
klass.inherited klass
end
private
def _dump(depth)
return ""
def Singleton.included (klass)
# should this be checked?
# raise TypeError.new "..." if klass.type == Module
klass.module_eval {
undef_method :clone
undef_method :dup
}
class << klass
def inherited(sub_klass)
# @__instance__ takes on one of the following values
# * nil - before (and after a failed) creation
# * false - during creation
# * sub_class instance - after a successful creation
sub_klass.instance_eval { @__instance__ = nil }
def sub_klass.instance
unless @__instance__.nil?
# is the extra flexiblity having the hook method
# _wait() around ever useful?
_wait()
# check for instance creation
return @__instance__ if @__instance__
end
Thread.critical = true
unless @__instance__
@__instance__ = false
Thread.critical = false
begin
@__instance__ = new
ensure
if @__instance__
define_method(:instance) {@__instance__ }
else
# failed instance creation
@__instance__ = nil
end
end
else
Thread.critical = false
end
return @__instance__
end
end
def _load(str)
instance
end
def _wait
sleep(0.05) while false.equal?(@__instance__)
end
private :new, :allocate
# hook methods are also marked private
private :_load,:_wait
end
klass.inherited klass
end
private
def _dump(depth)
return ""
end
end
if __FILE__ == $0