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// $Id$
#include "ace/Monitor_Control/Num_Threads_Monitor.h"
#if defined (ACE_HAS_MONITOR_FRAMEWORK) && (ACE_HAS_MONITOR_FRAMEWORK == 1)
#if defined (ACE_LINUX)
#include "ace/OS_NS_stdio.h"
#endif
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
namespace ACE
{
namespace Monitor_Control
{
const char* Num_Threads_Monitor::default_name_ =
"OS/System/NumThreads";
Num_Threads_Monitor::Num_Threads_Monitor (const char* name)
: Monitor_Base (name, Monitor_Control_Types::MC_NUMBER)
#if defined (ACE_HAS_WIN32_PDH)
, Windows_Monitor (ACE_TEXT ("\\System\\Threads"))
#elif defined (ACE_LINUX)
, file_ptr_ (0)
, nthreads_ (0UL)
#endif
{
}
void
Num_Threads_Monitor::update (void)
{
#if defined (ACE_HAS_WIN32_PDH)
this->update_i ();
this->receive (this->value_);
#elif defined (ACE_LINUX)
this->file_ptr_ = ACE_OS::fopen (ACE_TEXT ("/proc/self/status"),
ACE_TEXT ("r"));
if (this->file_ptr_ == 0)
{
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("Num threads - opening ")
ACE_TEXT ("/proc/self/status failed\n")));
return;
}
char *item = 0;
char *arg = 0;
while ((ACE_OS::fgets (buf_, sizeof (buf_), file_ptr_)) != 0)
{
item = ACE_OS::strtok (this->buf_, " \t\n");
arg = ACE_OS::strtok (0, "\n");
if (item == 0 || arg == 0)
{
continue;
}
if (ACE_OS::strcmp (item, "Threads:") == 0)
{
sscanf (arg, "%lu", &this->nthreads_);
break;
}
}
/// Stores value and timestamp with thread-safety.
this->receive (static_cast<double> (this->nthreads_));
ACE_OS::fclose (this->file_ptr_);
#endif
}
const char*
Num_Threads_Monitor::default_name (void)
{
return Num_Threads_Monitor::default_name_;
}
void
Num_Threads_Monitor::clear_i (void)
{
#if defined (ACE_HAS_WIN32_PDH)
this->clear_impl ();
#endif
this->Monitor_Base::clear_i ();
}
}
}
ACE_END_VERSIONED_NAMESPACE_DECL
#endif /* ACE_HAS_MONITOR_FRAMEWORK==1 */
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