vspace::internals::Mutex Class Reference

#include <vspace.h>

Public Member Functions
	Mutex ()
	~Mutex ()
void	lock ()
void	unlock ()

Private Attributes
int	_owner
int	_locklevel
vaddr_t	_lock

Detailed Description

Definition at line 1706 of file vspace.h.

Constructor & Destructor Documentation

Mutex()

vspace::internals::Mutex::Mutex ( )

inline

Definition at line 1713 of file vspace.h.

          : _owner(-1), _locklevel(0), _lock(vmem_alloc(1)) {
  }

~Mutex()

vspace::internals::Mutex::~Mutex ( )

inline

Definition at line 1715 of file vspace.h.

           {
    vmem_free(_lock);
  }

Member Function Documentation

lock()

void vspace::internals::Mutex::lock ( )

inline

Definition at line 1718 of file vspace.h.

              {
    if (_owner == vmem.current_process) {
      _locklevel++;
    } else {
      lock_file(vmem.fd, METABLOCK_SIZE + _lock);
      _owner = vmem.current_process;
      _locklevel = 1;
    }
  }

unlock()

void vspace::internals::Mutex::unlock ( )

inline

Definition at line 1727 of file vspace.h.

                {
    if (--_locklevel == 0) {
      assert(_owner == vmem.current_process);
      _owner = -1;
      unlock_file(vmem.fd, METABLOCK_SIZE + _lock);
    }
  }

Field Documentation

_lock

vaddr_t vspace::internals::Mutex::_lock

private

Definition at line 1710 of file vspace.h.

_locklevel

int vspace::internals::Mutex::_locklevel

private

Definition at line 1709 of file vspace.h.

_owner

int vspace::internals::Mutex::_owner

private

Definition at line 1708 of file vspace.h.

---

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

• kernel/oswrapper/vspace.h