G4Threading.cc

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//
// $Id:$
//
// --------------------------------------------------------------
//      GEANT 4 class implementation file
//
// G4Threading.cc
//
// ---------------------------------------------------------------
// Author: Andrea Dotti (15 Feb 2013): First Implementation
// ---------------------------------------------------------------

#include "G4Threading.hh"
#if defined (WIN32)
   #include <Windows.h>
#else
   #include <unistd.h>
   #include <sys/types.h>
   #include <sys/syscall.h>
#endif

#if defined(G4MULTITHREADED)

#include <map>

namespace {
    G4ThreadLocal G4int G4ThreadID = -1;
}

G4Pid_t G4Threading::G4GetPidId()
{ // In multithreaded mode return Thread ID
   #if defined(__MACH__)
     return syscall(SYS_thread_selfid);
   #elif defined(WIN32)
     return GetCurrentThreadId();
   #else
     return syscall(SYS_gettid);
   #endif
}

G4int G4Threading::G4GetNumberOfCores()
{
   #if defined(WIN32)
     SYSTEM_INFO sysinfo;
     GetSystemInfo( &sysinfo );
     return static_cast<G4int>( sysinfo.dwNumberOfProcessors );
   #else
     return static_cast<G4int>(sysconf( _SC_NPROCESSORS_ONLN ));
   #endif
}

void G4Threading::G4SetThreadId(G4int value ) { G4ThreadID = value; }
G4int G4Threading::G4GetThreadId() { return G4ThreadID; }
G4bool G4Threading::IsWorkerThread() { return (G4ThreadID>=0); }

#if defined(WIN32)  // WIN32 stuff needed for MT
DWORD /*WINAPI*/ G4WaitForSingleObjectInf( __in G4Mutex m )
 { return WaitForSingleObject( m , INFINITE); }
BOOL G4ReleaseMutex( __in G4Mutex m)
 { return ReleaseMutex(m); }
#endif

#else  // Sequential mode

#include "globals.hh"

G4int fake_mutex_lock_unlock( G4Mutex* ) { return 0; }

G4Pid_t G4Threading::G4GetPidId()  // In sequential mode return Process ID and not Thread ID
{
    #if defined(WIN32)
    return GetCurrentProcessId();
    #else
    return getpid();
    #endif
}

G4int G4Threading::G4GetNumberOfCores() { return 1; }
G4int G4Threading::G4GetThreadId() { return -2; }
G4bool G4Threading::IsWorkerThread() { return false; }
void G4Threading::G4SetThreadId(G4int) {}

#endif