### Home Classes Methods

### In Files

- lib/active_ldap/timeout.rb
- lib/active_ldap/timeout_stub.rb

### Methods

- ::alarm

### Files

- USAGE

### Class/Module Index

Quicksearch

- ActiveLdap
- ActiveLdap::ActionController
- ActiveLdap::ActionController::LdapBenchmarking
- ActiveLdap::Acts
- ActiveLdap::Acts::Tree
- ActiveLdap::Acts::Tree::ClassMethods
- ActiveLdap::Adapter
- ActiveLdap::Adapter::Base
- ActiveLdap::Adapter::Jndi
- ActiveLdap::Adapter::JndiConnection
- ActiveLdap::Adapter::JndiConnection::ModifyRecord
- ActiveLdap::Adapter::JndiConnection::Scope
- ActiveLdap::Adapter::Ldap
- ActiveLdap::Adapter::Ldap::Method
- ActiveLdap::Adapter::Ldap::Method::Base
- ActiveLdap::Adapter::Ldap::Method::Plain
- ActiveLdap::Adapter::Ldap::Method::SSL
- ActiveLdap::Adapter::Ldap::Method::TLS
- ActiveLdap::Adapter::NetLdap
- ActiveLdap::Association
- ActiveLdap::Association::BelongsTo
- ActiveLdap::Association::BelongsToMany
- ActiveLdap::Association::Children
- ActiveLdap::Association::Collection
- ActiveLdap::Association::HasMany
- ActiveLdap::Association::HasManyUtils
- ActiveLdap::Association::HasManyWrap
- ActiveLdap::Association::Proxy
- ActiveLdap::Associations
- ActiveLdap::Associations::ClassMethods
- ActiveLdap::AttributeMethods
- ActiveLdap::AttributeMethods::BeforeTypeCast
- ActiveLdap::AttributeMethods::Dirty
- ActiveLdap::AttributeMethods::Query
- ActiveLdap::AttributeMethods::Read
- ActiveLdap::AttributeMethods::Write
- ActiveLdap::Attributes
- ActiveLdap::Attributes::ClassMethods
- ActiveLdap::Attributes::Normalizable
- ActiveLdap::Callbacks
- ActiveLdap::Callbacks::ClassMethods
- ActiveLdap::Command
- ActiveLdap::Compatible
- ActiveLdap::Configuration
- ActiveLdap::Configuration::ClassMethods
- ActiveLdap::Connection
- ActiveLdap::Connection::ClassMethods
- ActiveLdap::DN
- ActiveLdap::DistinguishedName
- ActiveLdap::DistinguishedName::Parser
- ActiveLdap::Entry
- ActiveLdap::EntryAttribute
- ActiveLdap::Escape
- ActiveLdap::Generators
- ActiveLdap::Generators::ModelGenerator
- ActiveLdap::Generators::ScaffoldGenerator
- ActiveLdap::GetText
- ActiveLdap::GetText::Parser
- ActiveLdap::GetTextSupport
- ActiveLdap::Helper
- ActiveLdap::HumanReadable
- ActiveLdap::HumanReadable::ClassMethods
- ActiveLdap::LDIF
- ActiveLdap::LdapError
- ActiveLdap::Ldif
- ActiveLdap::Ldif::AddRecord
- ActiveLdap::Ldif::Attribute
- ActiveLdap::Ldif::Attributes
- ActiveLdap::Ldif::ChangeRecord
- ActiveLdap::Ldif::ChangeRecord::Control
- ActiveLdap::Ldif::ContentRecord
- ActiveLdap::Ldif::DeleteRecord
- ActiveLdap::Ldif::ModifyDNRecord
- ActiveLdap::Ldif::ModifyNameRecord
- ActiveLdap::Ldif::ModifyRDNRecord
- ActiveLdap::Ldif::ModifyRecord
- ActiveLdap::Ldif::ModifyRecord::AddOperation
- ActiveLdap::Ldif::ModifyRecord::DeleteOperation
- ActiveLdap::Ldif::ModifyRecord::Operation
- ActiveLdap::Ldif::ModifyRecord::ReplaceOperation
- ActiveLdap::Ldif::Parser
- ActiveLdap::Ldif::Record
- ActiveLdap::Ldif::Scanner
- ActiveLdap::LogSubscriber
- ActiveLdap::ObjectClass
- ActiveLdap::ObjectClass::ClassMethods
- ActiveLdap::Operations
- ActiveLdap::Operations::ClassOnlyDelete
- ActiveLdap::Operations::ClassOnlyUpdate
- ActiveLdap::Operations::Common
- ActiveLdap::Operations::Delete
- ActiveLdap::Operations::Find
- ActiveLdap::Operations::LDIF
- ActiveLdap::Operations::LDIF::AddRecordLoadable
- ActiveLdap::Operations::LDIF::ContentRecordLoadable
- ActiveLdap::Operations::LDIF::DeleteRecordLoadable
- ActiveLdap::Operations::LDIF::ModifyNameRecordLoadable
- ActiveLdap::Operations::LDIF::ModifyRecordLoadable
- ActiveLdap::Operations::LDIF::ModifyRecordLoadable::AddOperationModifiable
- ActiveLdap::Operations::LDIF::ModifyRecordLoadable::DeleteOperationModifiable
- ActiveLdap::Operations::LDIF::ModifyRecordLoadable::ReplaceOperationModifiable
- ActiveLdap::Operations::Update
- ActiveLdap::Persistence
- ActiveLdap::Populate
- ActiveLdap::Railtie
- ActiveLdap::Railties
- ActiveLdap::Railties::ControllerRuntime
- ActiveLdap::Railties::ControllerRuntime::ClassMethods
- ActiveLdap::Schema
- ActiveLdap::Schema::Attribute
- ActiveLdap::Schema::Entry
- ActiveLdap::Schema::ObjectClass
- ActiveLdap::Schema::Syntax
- ActiveLdap::Schema::Syntaxes
- ActiveLdap::Schema::Syntaxes::Base
- ActiveLdap::Schema::Syntaxes::BitString
- ActiveLdap::Schema::Syntaxes::Boolean
- ActiveLdap::Schema::Syntaxes::CountryString
- ActiveLdap::Schema::Syntaxes::DirectoryString
- ActiveLdap::Schema::Syntaxes::DistinguishedName
- ActiveLdap::Schema::Syntaxes::GeneralizedTime
- ActiveLdap::Schema::Syntaxes::Integer
- ActiveLdap::Schema::Syntaxes::JPEG
- ActiveLdap::Schema::Syntaxes::NameAndOptionalUID
- ActiveLdap::Schema::Syntaxes::NumericString
- ActiveLdap::Schema::Syntaxes::OID
- ActiveLdap::Schema::Syntaxes::ObjectSecurityDescriptor
- ActiveLdap::Schema::Syntaxes::OctetString
- ActiveLdap::Schema::Syntaxes::OtherMailbox
- ActiveLdap::Schema::Syntaxes::PostalAddress
- ActiveLdap::Schema::Syntaxes::PrintableString
- ActiveLdap::Schema::Syntaxes::TelephoneNumber
- ActiveLdap::UserPassword
- ActiveLdap::UserPassword::Salt
- ActiveLdap::Validations
- ActiveLdap::XML
- ActiveLdap::Xml
- ActiveLdap::Xml::Serializer
- LDAP
- LDAP::Conn
- LDAP::Mod
- Net
- Net::LDAP
- Net::LDAP::Entry
- ActionView
- ActionView::Base
- URI
- URI::LDAPS
- Object
- Timeout

No matching classes.

# Timeout

### Public Class Methods

alarm(sec, exception=Timeout::Error, &block) click to toggle source

A forking timeout implementation that relies on signals to interrupt blocking I/O instead of passing that code to run in a separate process.

A process is fork()ed, sleeps for sec, then sends a ALRM signal to the Process.ppid process. ALRM is used to avoid conflicts with sleep()

This overwrites any signal

    # File lib/active_ldap/timeout.rb, line 14
    def Timeout.alarm(sec, exception=Timeout::Error, &block)
      return block.call if sec == nil or sec.zero?

      # Trap an alarm in case it comes before we're ready
      orig_alrm = trap(:ALRM, 'IGNORE')

      # Setup a fallback in case of a race condition of an
      # alarm before we set the other trap
      trap(:ALRM) do
        # Don't leave zombies
        Process.wait2()
        # Restore the original handler
        trap('ALRM', orig_alrm)
        # Now raise an exception!
        raise exception, 'execution expired'
      end

      # Spawn the sleeper
      pid = Process.fork {
        begin
          # Sleep x seconds then send SIGALRM
          sleep(sec)
          # Send alarm!
          Process.kill(:ALRM, Process.ppid)
        end
        exit! 0
      }

      # Setup the real handler
      trap(:ALRM) do
        # Make sure we clean up any zombies
        Process.waitpid(pid)
        # Restore the original handler
        trap(:ALRM, orig_alrm)
        # Now raise an exception!
        raise exception, 'execution expired'
      end

      begin
        # Run the code!
        return block.call
      ensure
        # Restore old alarm handler since we're done
        trap(:ALRM, orig_alrm)
        # Make sure the process is dead
        # This may be run twice (trap occurs during execution) so ignore ESRCH
        Process.kill(:TERM, pid) rescue Errno::ESRCH
        # Don't leave zombies
        Process.waitpid(pid) rescue Errno::ECHILD
      end
    end

[Validate]

Generated with the Darkfish Rdoc Generator 2.