vspace::internals::FastLock Class Reference

#include <vspace.h>

Public Member Functions
	FastLock (vaddr_t offset=0)
void	lock ()
void	unlock ()

Private Attributes
vaddr_t	_offset

Detailed Description

Definition at line 1431 of file vspace.h.

Constructor & Destructor Documentation

FastLock()

vspace::internals::FastLock::FastLock ( vaddr_t offset = 0 )

inline

Definition at line 1445 of file vspace.h.

                             : _offset(offset) {
  }

Member Function Documentation

lock()

void vspace::internals::FastLock::lock

(

)

Definition at line 748 of file vspace.cc.

                    {
#ifdef HAVE_CPP_THREADS
  while (_lock.test_and_set()) {
  }
  bool empty = _owner < 0;
  if (empty) {
    _owner = vmem.current_process;
  } else {
    int p = vmem.current_process;
    vmem.metapage->process_info[p].next = -1;
    if (_head < 0)
      _head = p;
    else
      vmem.metapage->process_info[_tail].next = p;
    _tail = p;
  }
  _lock.clear();
  if (!empty)
    wait_signal(false);
#else
  lock_file(vmem.fd, _offset);
#endif
}

unlock()

void vspace::internals::FastLock::unlock

(

)

Definition at line 772 of file vspace.cc.

                      {
#ifdef HAVE_CPP_THREADS
  while (_lock.test_and_set()) {
  }
  _owner = _head;
  if (_owner >= 0)
    _head = vmem.metapage->process_info[_head].next;
  _lock.clear();
  if (_owner >= 0)
    send_signal(_owner, 0, false);
#else
  unlock_file(vmem.fd, _offset);
#endif
}

Field Documentation

_offset

vaddr_t vspace::internals::FastLock::_offset

private

Definition at line 1437 of file vspace.h.

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

• kernel/oswrapper/vspace.h
• kernel/oswrapper/vspace.cc