Class: SysVIPC::SharedMemory

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

Constant Summary

Constants included from SysVIPC

VERSION

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from SysVIPC

#check_result

Instance Attribute Details

#shmid ⇒ Object (readonly)

Returns the value of attribute shmid.



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# File 'lib/SysVIPC.rb', line 315

def shmid
  @shmid
end

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).



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# File 'lib/SysVIPC.rb', line 349

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).



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# File 'lib/SysVIPC.rb', line 357

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

#ipc_rmid ⇒ Object Also known as: rm

Remove. See shmctl(2).



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# File 'lib/SysVIPC.rb', line 339

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).



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# File 'lib/SysVIPC.rb', line 328

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).



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# File 'lib/SysVIPC.rb', line 319

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