Class: SysVIPC::SharedMemory

Inherits:
Object
  • Object
show all
Defined in:
lib/sysvipc.rb

Instance Method Summary collapse

Instance Method Details

#attach(shmaddr = nil, flags = 0) ⇒ Object

Attach to a shared memory address object and return it. See shmat(2). If shmaddr is nil, the shared memory is attached at the first available address as selected by the system. See shmat(2).



342
343
344
345
346
 
# File 'lib/sysvipc.rb', line 342

def attach(shmaddr = nil, flags = 0)
  shmaddr = shmat(@shmid, shmaddr, flags)
  check_result(shmaddr)
  shmaddr
end

#detach(shmaddr) ⇒ Object

Detach the Shmaddr object shmaddr. See shmdt(2).



350
351
352
 
# File 'lib/sysvipc.rb', line 350

def detach(shmaddr)
  check_result(shmdt(shmaddr))
end

#ipc_rmid ⇒ Object Also known as: rm

Remove. See shmctl(2).



332
333
334
 
# File 'lib/sysvipc.rb', line 332

def ipc_rmid
  check_result(shmctl(@shmid, IPC_RMID, nil))
end

#ipc_set(shmid_ds) ⇒ Object Also known as: shmid_ds=

Set the Shmid_ds object. See shmctl(2).



321
322
323
324
325
326
327
 
# File 'lib/sysvipc.rb', line 321

def ipc_set(shmid_ds)
  unless Shmid_ds === shmid_ds
	raise ArgumentError,
	  "argument to ipc_set must be a Shmid_ds"
  end
  check_result(shmctl(@shmid, IPC_SET, shmid_ds))
end

#ipc_stat ⇒ Object Also known as: shmid_ds

Return the Shmid_ds object. See shmctl(2).



312
313
314
315
316
 
# File 'lib/sysvipc.rb', line 312

def ipc_stat
  res, shmid_ds = shmctl(@shmid, IPC_STAT)
  check_result(res)
  shmid_ds
end