Class Mutex
In: ext/fastthread/fastthread.c
Parent: Object

Mutex implements a simple semaphore that can be used to coordinate access to shared data from multiple concurrent threads.

Example:

  require 'thread'
  semaphore = Mutex.new

  a = Thread.new {
    semaphore.synchronize {
      # access shared resource
    }
  }

  b = Thread.new {
    semaphore.synchronize {
      # access shared resource
    }
  }

Methods

Public Instance methods

exclusive_unlock { ... }

If the mutex is locked, unlocks the mutex, wakes one waiting thread, and yields in a critical section.

lock

Attempts to grab the lock and waits if it isn‘t available.

Returns true if this lock is currently held by some thread.

for marshalling mutexes and condvars

Obtains a lock, runs the block, and releases the lock when the block completes. See the example under Mutex.

Attempts to obtain the lock and returns immediately. Returns true if the lock was granted.

unlock()

Releases the lock. Returns nil if ref wasn‘t locked.

[Validate]