class WithAdvisoryLock::Flock

Public Instance Methods

file_io() click to toggle source
# File lib/with_advisory_lock/flock.rb, line 14
def file_io
  @file_io ||= begin
    FileUtils.touch(filename)
    File.open(filename, 'r+')
  end
end
filename() click to toggle source
# File lib/with_advisory_lock/flock.rb, line 5
def filename
  @filename ||= begin
    safe = lock_str.to_s.gsub(/[^a-z0-9]/i, '')
    fn = ".lock-#{safe}-#{stable_hashcode(lock_str)}"
    # Let the user specify a directory besides CWD.
    ENV['FLOCK_DIR'] ? File.expand_path(fn, ENV['FLOCK_DIR']) : fn
  end
end
release_lock() click to toggle source
# File lib/with_advisory_lock/flock.rb, line 28
def release_lock
  0 == file_io.flock(File::LOCK_UN)
end
try_lock() click to toggle source
# File lib/with_advisory_lock/flock.rb, line 21
def try_lock
  if transaction
    raise ArgumentError, 'transaction level locks are not supported on SQLite'
  end
  0 == file_io.flock((shared ? File::LOCK_SH : File::LOCK_EX) | File::LOCK_NB)
end