Module: File::Lock
- Included in:
- File
- Defined in:
- lib/vex/base/filesystem/lock.rb
Defined Under Namespace
Modules: Etest
Instance Method Summary collapse
-
#locked(path, &block) ⇒ Object
File.locked implements recursive locking based on lock files.
Instance Method Details
#locked(path, &block) ⇒ Object
File.locked implements recursive locking based on lock files.
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# File 'lib/vex/base/filesystem/lock.rb', line 4 def locked(path, &block) file = File.open "#{path}.lck", "w+" begin # First try to lock the file nonblockingly. # Failing that it might be already locked by *this* process. # Otherwise it is locked by someone else. if locked = file.flock(File::LOCK_EX | File::LOCK_NB) File.write("#{path}.pid", Thread.uid) elsif File.read("#{path}.pid") == Thread.uid # already locked by us. else locked = file.flock(File::LOCK_EX) end yield ensure file.flock(File::LOCK_UN) if locked end end |