Process_Semaphore.cpp

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// $Id: Process_Semaphore.cpp 80826 2008-03-04 14:51:23Z wotte $

#include "ace/Process_Semaphore.h"
#include "ace/Log_Msg.h"
#include "ace/OS_Memory.h"

#if !defined (__ACE_INLINE__)
#include "ace/Process_Semaphore.inl"
#endif /* __ACE_INLINE__ */

#include "ace/ACE.h"

ACE_RCSID(ace, Process_Semaphore, "$Id: Process_Semaphore.cpp 80826 2008-03-04 14:51:23Z wotte $")

ACE_BEGIN_VERSIONED_NAMESPACE_DECL

void
ACE_Process_Semaphore::dump (void) const
{
#if defined (ACE_HAS_DUMP)
// ACE_TRACE ("ACE_Process_Semaphore::dump");
  ACE_DEBUG ((LM_DEBUG, ACE_BEGIN_DUMP, this));
  this->lock_.dump ();
  ACE_DEBUG ((LM_DEBUG, ACE_END_DUMP));
#endif /* ACE_HAS_DUMP */
}

ACE_Process_Semaphore::ACE_Process_Semaphore (u_int count,
                                              const ACE_TCHAR *name,
                                              void *arg,
                                              int max)
#if defined (ACE_WIN32) || defined (ACE_HAS_POSIX_SEM)
  : lock_ (count, USYNC_PROCESS, name, arg, max)
#else
  : lock_ (ACE_TEXT_ALWAYS_CHAR (name),
           ACE_SV_Semaphore_Complex::ACE_CREATE,
           count)
#endif /* ACE_WIN32 || ACE_HAS_POSIX_SEM */
{
  ACE_UNUSED_ARG (arg);
  ACE_UNUSED_ARG (max);
// ACE_TRACE ("ACE_Process_Semaphore::ACE_Process_Semaphore");
}

// Explicitly destroy the semaphore.

int
ACE_Process_Semaphore::remove (void)
{
// ACE_TRACE ("ACE_Process_Semaphore::remove");
  return this->lock_.remove ();
}

// Block the thread until the semaphore count becomes
// greater than 0, then decrement it.

int
ACE_Process_Semaphore::acquire (void)
{
// ACE_TRACE ("ACE_Process_Semaphore::acquire");
#if defined (ACE_WIN32) || defined (ACE_HAS_POSIX_SEM)
  return this->lock_.acquire ();
#else
  return this->lock_.acquire (0, SEM_UNDO);
#endif /* defined (ACE_WIN32) || defined (ACE_HAS_POSIX_SEM) */
}

// Conditionally decrement the semaphore if count is greater
// than 0 (i.e., won't block).

int
ACE_Process_Semaphore::tryacquire (void)
{
// ACE_TRACE ("ACE_Process_Semaphore::tryacquire");
#if defined (ACE_WIN32) || defined (ACE_HAS_POSIX_SEM)
  return this->lock_.tryacquire ();
#else
  return this->lock_.tryacquire (0, SEM_UNDO);
#endif /* defined (ACE_WIN32) || defined (ACE_HAS_POSIX_SEM) */
}

// Increment the semaphore, potentially unblocking
// a waiting thread.

int
ACE_Process_Semaphore::release (void)
{
// ACE_TRACE ("ACE_Process_Semaphore::release");
#if defined (ACE_WIN32) || defined (ACE_HAS_POSIX_SEM)
  return this->lock_.release ();
#else
  return this->lock_.release (0, SEM_UNDO);
#endif /* defined (ACE_WIN32) || defined (ACE_HAS_POSIX_SEM) */
}

/*****************************************************************************/

ACE_Process_Semaphore *
ACE_Malloc_Lock_Adapter_T<ACE_Process_Semaphore>::operator () (const ACE_TCHAR *name)
{
  ACE_Process_Semaphore *p = 0;
  if (name == 0)
    ACE_NEW_RETURN (p, ACE_Process_Semaphore (1, name), 0);
  else
    ACE_NEW_RETURN (p, ACE_Process_Semaphore (1, ACE::basename (name,
                                                                ACE_DIRECTORY_SEPARATOR_CHAR)),
                    0);
  return p;
}

ACE_END_VERSIONED_NAMESPACE_DECL

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