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// $Id$
#include "ace/Mutex.h"
#if !defined (__ACE_INLINE__)
#include "ace/Mutex.inl"
#endif /* __ACE_INLINE__ */
#include "ace/OS_NS_string.h"
#include "ace/os_include/sys/os_mman.h"
ACE_RCSID(ace, Mutex, "$Id$")
ACE_ALLOC_HOOK_DEFINE(ACE_Mutex)
void
ACE_Mutex::dump (void) const
{
// ACE_TRACE ("ACE_Mutex::dump");
ACE_DEBUG ((LM_DEBUG, ACE_BEGIN_DUMP, this));
#if defined (CHORUS)
ACE_DEBUG ((LM_DEBUG, ACE_LIB_TEXT ("lockname_ = %s\n"), this->lockname_));
ACE_DEBUG ((LM_DEBUG, ACE_LIB_TEXT ("process_lock_ = %x\n"), this->process_lock_));
#endif /* CHORUS */
ACE_DEBUG ((LM_DEBUG, ACE_LIB_TEXT ("\n")));
ACE_DEBUG ((LM_DEBUG, ACE_END_DUMP));
}
ACE_Mutex::ACE_Mutex (int type, const ACE_TCHAR *name,
ACE_mutexattr_t *arg, mode_t mode)
:
#if defined (CHORUS) || defined (ACE_HAS_PTHREADS) || defined(ACE_HAS_STHREADS)
process_lock_ (0),
lockname_ (0),
#endif /* CHORUS */
removed_ (0)
{
// ACE_TRACE ("ACE_Mutex::ACE_Mutex");
// These platforms need process-wide mutex to be in shared memory.
#if defined (CHORUS) || defined(ACE_HAS_PTHREADS) || defined (ACE_HAS_STHREADS)
if (type == USYNC_PROCESS)
{
// Let's see if the shared memory entity already exists.
ACE_HANDLE fd = ACE_OS::shm_open (name, O_RDWR | O_CREAT | O_EXCL, mode);
if (fd == ACE_INVALID_HANDLE)
{
if (errno == EEXIST)
fd = ACE_OS::shm_open (name, O_RDWR | O_CREAT, mode);
else
return;
}
else
{
// We own this shared memory object! Let's set its size.
if (ACE_OS::ftruncate (fd,
sizeof (ACE_mutex_t)) == -1)
{
ACE_OS::close (fd);
return;
}
this->lockname_ = ACE_OS::strdup (name);
if (this->lockname_ == 0)
{
ACE_OS::close (fd);
return;
}
}
this->process_lock_ =
(ACE_mutex_t *) ACE_OS::mmap (0,
sizeof (ACE_mutex_t),
PROT_RDWR,
MAP_SHARED,
fd,
0);
ACE_OS::close (fd);
if (this->process_lock_ == MAP_FAILED)
return;
if (this->lockname_
&& ACE_OS::mutex_init (this->process_lock_,
type,
name,
arg) != 0)
return;
}
// It is ok to fall through into the <mutex_init> below if the
// USYNC_PROCESS flag is not enabled.
#else
ACE_UNUSED_ARG (mode);
#endif /* CHORUS */
if (ACE_OS::mutex_init (&this->lock_,
type,
name,
arg) != 0)
ACE_ERROR ((LM_ERROR,
ACE_LIB_TEXT ("%p\n"),
ACE_LIB_TEXT ("ACE_Mutex::ACE_Mutex")));
}
ACE_Mutex::~ACE_Mutex (void)
{
// ACE_TRACE ("ACE_Mutex::~ACE_Mutex");
this->remove ();
}
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