sbuild  1.5.3
Public Member Functions | Private Attributes
sbuild::device_lock Class Reference

Device lock. More...

#include <sbuild-lock.h>

+ Inheritance diagram for sbuild::device_lock:
+ Collaboration diagram for sbuild::device_lock:

List of all members.

Public Member Functions

 device_lock (std::string const &device)
 The constructor.
virtual ~device_lock ()
 The destructor.
virtual void set_lock (lock::type lock_type, unsigned int timeout)
 Acquire a lock.
virtual void unset_lock ()
 Release a lock.

Private Attributes

std::string device
 The device to lock.
bool locked
 Is the file locked?

Detailed Description

Device lock.

Set an advisory lock on a device. The lock is acquired using liblockdev lock_dev(). Note that a lock_type of LOCK_SHARED is equivalent to LOCK_EXCLUSIVE, because this lock type does not support shared locks.


Constructor & Destructor Documentation

device_lock::device_lock ( std::string const &  device)

The constructor.

Parameters:
devicethe device to lock (full pathname).

Member Function Documentation

void device_lock::set_lock ( lock::type  lock_type,
unsigned int  timeout 
) [virtual]
void device_lock::unset_lock ( ) [virtual]

Release a lock.

This is equivalent to set_lock with a lock_type of LOCK_NONE and a timeout of 0.

Implements sbuild::lock.

References sbuild::lock::LOCK_NONE, and set_lock().

Referenced by sbuild::chroot_block_device::setup_lock(), and sbuild::chroot_lvm_snapshot::setup_lock().

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The documentation for this class was generated from the following files: