xref: /gem5/ext/systemc/src/sysc/kernel/sc_thread_process.cpp

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

  Licensed to Accellera Systems Initiative Inc. (Accellera) under one or
  more contributor license agreements.  See the NOTICE file distributed
  with this work for additional information regarding copyright ownership.
  Accellera licenses this file to you under the Apache License, Version 2.0
  (the "License"); you may not use this file except in compliance with the
  License.  You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
  implied.  See the License for the specific language governing
  permissions and limitations under the License.

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

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

  sc_thread_process.cpp -- Thread process implementation

  Original Author: Andy Goodrich, Forte Design Systems, 4 August 2005

 CHANGE LOG AT THE END OF THE FILE
 *****************************************************************************/

#include "sysc/kernel/sc_cmnhdr.h"
#include "sysc/kernel/sc_constants.h"
#include "sysc/kernel/sc_thread_process.h"
#include "sysc/kernel/sc_process_handle.h"
#include "sysc/kernel/sc_simcontext_int.h"
#include "sysc/kernel/sc_module.h"
#include "sysc/utils/sc_machine.h"

// DEBUGGING MACROS:
//
// DEBUG_MSG(NAME,P,MSG)
//     MSG  = message to print
//     NAME = name that must match the process for the message to print, or
//            null if the message should be printed unconditionally.
//     P    = pointer to process message is for, or NULL in which case the
//            message will not print.
#if 0
#   define DEBUG_NAME ""
#   define DEBUG_MSG(NAME,P,MSG) \
    { \
        if ( P && ( (strlen(NAME)==0) || !strcmp(NAME,P->name())) ) \
          std::cout << "**** " << sc_time_stamp() << " ("  \
	            << sc_get_current_process_name() << "): " << MSG \
		    << " - " << P->name() << std::endl; \
    }
#else
#   define DEBUG_MSG(NAME,P,MSG)
#endif


//------------------------------------------------------------------------------
// user-defined default stack-size
//------------------------------------------------------------------------------
#if defined(SC_OVERRIDE_DEFAULT_STACK_SIZE)
#   define SC_DEFAULT_STACK_SIZE_ SC_OVERRIDE_DEFAULT_STACK_SIZE

//------------------------------------------------------------------------------
// architecture-specific default stack sizes
//------------------------------------------------------------------------------
#elif !defined(SC_USE_PTHREADS) && (defined(__CYGWIN32__) || defined(__CYGWIN32))
#   define SC_DEFAULT_STACK_SIZE_ 0x50000

#elif defined(SC_LONG_64) || defined(__x86_64__) || defined(__LP64__) || \
      defined(_M_X64) || defined(_M_AMD64)
#   define SC_DEFAULT_STACK_SIZE_ 0x40000

#else
#   define SC_DEFAULT_STACK_SIZE_ 0x20000

#endif // SC_DEFAULT_STACK_SIZE_


//------------------------------------------------------------------------------
// force 16-byte alignment on coroutine entry functions, needed for
// QuickThreads (32-bit, see also fixes in qt/md/{i386,iX86_64}.[hs]),
// and MinGW32 / Cygwin32 compilers on Windows platforms
#if defined(__GNUC__) && !defined(__ICC) && !defined(__x86_64__) && \
    (__GNUC__ > 4 || __GNUC__ == 4 && __GNUC_MINOR__ > 1 )
# define SC_ALIGNED_STACK_ \
    __attribute__((force_align_arg_pointer))
#else
# define SC_ALIGNED_STACK_ /* empty */
#endif


namespace sc_core {

const int SC_DEFAULT_STACK_SIZE   = SC_DEFAULT_STACK_SIZE_;
#undef SC_DEFAULT_STACK_SIZE_
#undef SC_OVERRIDE_DEFAULT_STACK_SIZE

//------------------------------------------------------------------------------
//"sc_thread_cor_fn"
//
// This function invokes the coroutine for the supplied object instance.
//------------------------------------------------------------------------------
SC_ALIGNED_STACK_
void sc_thread_cor_fn( void* arg )
{
    sc_simcontext*   simc_p = sc_get_curr_simcontext();
    sc_thread_handle thread_h = RCAST<sc_thread_handle>( arg );

    // PROCESS THE THREAD AND PROCESS ANY EXCEPTIONS THAT ARE THROWN:

    while( true ) {

        try {
            thread_h->semantics();
        }
        catch( sc_user ) {
            continue;
        }
        catch( sc_halt ) {
            ::std::cout << "Terminating process "
                      << thread_h->name() << ::std::endl;
        }
        catch( const sc_unwind_exception& ex ) {
	    ex.clear();
            if ( ex.is_reset() ) continue;
        }
        catch( ... ) {
            sc_report* err_p = sc_handle_exception();
            thread_h->simcontext()->set_error( err_p );
        }
        break;
    }

    sc_process_b*    active_p = sc_get_current_process_b();

    // REMOVE ALL TRACES OF OUR THREAD FROM THE SIMULATORS DATA STRUCTURES:

    thread_h->disconnect_process();

    // IF WE AREN'T ACTIVE MAKE SURE WE WON'T EXECUTE:

    if ( thread_h->next_runnable() != 0 )
    {
	simc_p->remove_runnable_thread(thread_h);
    }

    // IF WE ARE THE ACTIVE PROCESS ABORT OUR EXECUTION:


    if ( active_p == (sc_process_b*)thread_h )
    {

        sc_core::sc_cor* x = simc_p->next_cor();
	simc_p->cor_pkg()->abort( x );
    }

}


//------------------------------------------------------------------------------
//"sc_thread_process::disable_process"
//
// This virtual method suspends this process and its children if requested to.
//     descendants = indicator of whether this process' children should also
//                   be suspended
//------------------------------------------------------------------------------
void sc_thread_process::disable_process(
    sc_descendant_inclusion_info descendants )
{

    // IF NEEDED PROPOGATE THE DISABLE REQUEST THROUGH OUR DESCENDANTS:

    if ( descendants == SC_INCLUDE_DESCENDANTS )
    {
        const std::vector<sc_object*>& children = get_child_objects();
        int                            child_n  = children.size();

        for ( int child_i = 0; child_i < child_n; child_i++ )
        {
            sc_process_b* child_p = DCAST<sc_process_b*>(children[child_i]);
            if ( child_p ) child_p->disable_process(descendants);
        }
    }

    // DON'T ALLOW CORNER CASE BY DEFAULT:

    if ( !sc_allow_process_control_corners )
    {
	switch( m_trigger_type )
	{
	  case AND_LIST_TIMEOUT:
	  case EVENT_TIMEOUT:
	  case OR_LIST_TIMEOUT:
	  case TIMEOUT:
	    report_error(SC_ID_PROCESS_CONTROL_CORNER_CASE_,
		         "attempt to disable a thread with timeout wait");
	    break;
	  default:
	    break;
	}
    }

    // DISABLE OUR OBJECT INSTANCE:

    m_state = m_state | ps_bit_disabled;

    // IF THIS CALL IS BEFORE THE SIMULATION DON'T RUN THE THREAD:

    if ( !sc_is_running() )
    {
	m_state = m_state | ps_bit_ready_to_run;
        simcontext()->remove_runnable_thread(this);
    }
}

//------------------------------------------------------------------------------
//"sc_thread_process::enable_process"
//
// This method resumes the execution of this process, and if requested, its
// descendants. If the process was suspended and has a resumption pending it
// will be dispatched in the next delta cycle. Otherwise the state will be
// adjusted to indicate it is no longer suspended, but no immediate execution
// will occur.
//------------------------------------------------------------------------------
void sc_thread_process::enable_process(
    sc_descendant_inclusion_info descendants )
{

    // IF NEEDED PROPOGATE THE ENABLE REQUEST THROUGH OUR DESCENDANTS:

    if ( descendants == SC_INCLUDE_DESCENDANTS )
    {
        const std::vector<sc_object*>& children = get_child_objects();
        int                            child_n  = children.size();

        for ( int child_i = 0; child_i < child_n; child_i++ )
        {
            sc_process_b* child_p = DCAST<sc_process_b*>(children[child_i]);
            if ( child_p ) child_p->enable_process(descendants);
        }
    }

    // ENABLE THIS OBJECT INSTANCE:
    //
    // If it was disabled and ready to run then put it on the run queue.

    m_state = m_state & ~ps_bit_disabled;
    if ( m_state == ps_bit_ready_to_run && sc_allow_process_control_corners )
    {
        m_state = ps_normal;
	if ( next_runnable() == 0 )
	    simcontext()->push_runnable_thread(this);
    }
}


//------------------------------------------------------------------------------
//"sc_thread_process::kill_process"
//
// This method removes this object instance from use. It calls the
// sc_process_b::kill_process() method to perform low level clean up. Then
// it aborts this process if it is the active process.
//------------------------------------------------------------------------------
void sc_thread_process::kill_process(sc_descendant_inclusion_info descendants )
{

    // IF THE SIMULATION HAS NOT BEEN INITIALIZED YET THAT IS AN ERROR:

    if ( !sc_is_running() )
    {
        report_error( SC_ID_KILL_PROCESS_WHILE_UNITIALIZED_ );
    }

    // IF NEEDED PROPOGATE THE KILL REQUEST THROUGH OUR DESCENDANTS:

    if ( descendants == SC_INCLUDE_DESCENDANTS )
    {
        const std::vector<sc_object*> children = get_child_objects();
        int                           child_n  = children.size();

        for ( int child_i = 0; child_i < child_n; child_i++ )
        {
            sc_process_b* child_p = DCAST<sc_process_b*>(children[child_i]);
            if ( child_p ) child_p->kill_process(descendants);
        }
    }

    // IF THE PROCESS IS CURRENTLY UNWINDING OR IS ALREADY A ZOMBIE
    // IGNORE THE KILL:

    if ( m_unwinding )
    {
        SC_REPORT_WARNING( SC_ID_PROCESS_ALREADY_UNWINDING_, name() );
        return;
    }

    if ( m_state & ps_bit_zombie )
        return;

    // SET UP TO KILL THE PROCESS IF SIMULATION HAS STARTED:
    //
    // If the thread does not have a stack don't try the throw!

    if ( sc_is_running() && m_has_stack )
    {
        m_throw_status = THROW_KILL;
        m_wait_cycle_n = 0;
        simcontext()->preempt_with(this);
    }

    // IF THE SIMULATION HAS NOT STARTED REMOVE TRACES OF OUR PROCESS FROM
    // EVENT QUEUES, ETC.:

    else
    {
        disconnect_process();
    }
}

//------------------------------------------------------------------------------
//"sc_thread_process::prepare_for_simulation"
//
// This method prepares this object instance for simulation. It calls the
// coroutine package to create the actual thread.
//------------------------------------------------------------------------------
void sc_thread_process::prepare_for_simulation()
{
    m_cor_p = simcontext()->cor_pkg()->create( m_stack_size,
                         sc_thread_cor_fn, this );
    m_cor_p->stack_protect( true );
}


//------------------------------------------------------------------------------
//"sc_thread_process::resume_process"
//
// This method resumes the execution of this process, and if requested, its
// descendants. If the process was suspended and has a resumption pending it
// will be dispatched in the next delta cycle. Otherwise the state will be
// adjusted to indicate it is no longer suspended, but no immediate execution
// will occur.
//------------------------------------------------------------------------------
void sc_thread_process::resume_process(
    sc_descendant_inclusion_info descendants )
{

    // IF NEEDED PROPOGATE THE RESUME REQUEST THROUGH OUR DESCENDANTS:

    if ( descendants == SC_INCLUDE_DESCENDANTS )
    {
        const std::vector<sc_object*>& children = get_child_objects();
        int                            child_n  = children.size();

        for ( int child_i = 0; child_i < child_n; child_i++ )
        {
            sc_process_b* child_p = DCAST<sc_process_b*>(children[child_i]);
            if ( child_p ) child_p->resume_process(descendants);
        }
    }

    // BY DEFAULT THE CORNER CASE IS AN ERROR:

    if ( !sc_allow_process_control_corners && (m_state & ps_bit_disabled) &&
         (m_state & ps_bit_suspended) )
    {
	m_state = m_state & ~ps_bit_suspended;
        report_error(SC_ID_PROCESS_CONTROL_CORNER_CASE_,
	             "call to resume() on a disabled suspended thread");
    }

    // CLEAR THE SUSPENDED BIT:

    m_state = m_state & ~ps_bit_suspended;

    // RESUME OBJECT INSTANCE IF IT IS READY TO RUN:

    if ( m_state & ps_bit_ready_to_run )
    {
	m_state = m_state & ~ps_bit_ready_to_run;
	if ( next_runnable() == 0 )
	    simcontext()->push_runnable_thread(this);
	remove_dynamic_events();  // order important.
    }
}

//------------------------------------------------------------------------------
//"sc_thread_process::sc_thread_process"
//
// This is the object instance constructor for this class.
//------------------------------------------------------------------------------
sc_thread_process::sc_thread_process( const char* name_p, bool free_host,
    SC_ENTRY_FUNC method_p, sc_process_host* host_p,
    const sc_spawn_options* opt_p
):
    sc_process_b(
        name_p ? name_p : sc_gen_unique_name("thread_p"),
        true, free_host, method_p, host_p, opt_p),
    m_cor_p(0), m_monitor_q(), m_stack_size(SC_DEFAULT_STACK_SIZE),
    m_wait_cycle_n(0)
{

    // CHECK IF THIS IS AN sc_module-BASED PROCESS AND SIMULATION HAS STARTED:

    if ( DCAST<sc_module*>(host_p) != 0 && sc_is_running() )
    {
        report_error( SC_ID_MODULE_THREAD_AFTER_START_ );
    }

    // INITIALIZE VALUES:
    //
    // If there are spawn options use them.

    m_process_kind = SC_THREAD_PROC_;

    if (opt_p) {
        m_dont_init = opt_p->m_dont_initialize;
        if ( opt_p->m_stack_size ) m_stack_size = opt_p->m_stack_size;

        // traverse event sensitivity list
        for (unsigned int i = 0; i < opt_p->m_sensitive_events.size(); i++) {
            sc_sensitive::make_static_sensitivity(
                this, *opt_p->m_sensitive_events[i]);
        }

        // traverse port base sensitivity list
        for ( unsigned int i = 0; i < opt_p->m_sensitive_port_bases.size(); i++)
        {
            sc_sensitive::make_static_sensitivity(
                this, *opt_p->m_sensitive_port_bases[i]);
        }

        // traverse interface sensitivity list
        for ( unsigned int i = 0; i < opt_p->m_sensitive_interfaces.size(); i++)
        {
            sc_sensitive::make_static_sensitivity(
                this, *opt_p->m_sensitive_interfaces[i]);
        }

        // traverse event finder sensitivity list
        for ( unsigned int i = 0; i < opt_p->m_sensitive_event_finders.size();
            i++)
        {
            sc_sensitive::make_static_sensitivity(
                this, *opt_p->m_sensitive_event_finders[i]);
        }

        // process any reset signal specification:

	opt_p->specify_resets();

    }

    else
    {
        m_dont_init = false;
    }

}

//------------------------------------------------------------------------------
//"sc_thread_process::~sc_thread_process"
//
// This is the object instance constructor for this class.
//------------------------------------------------------------------------------
sc_thread_process::~sc_thread_process()
{

    // DESTROY THE COROUTINE FOR THIS THREAD:

    if( m_cor_p != 0 ) {
        m_cor_p->stack_protect( false );
        delete m_cor_p;
        m_cor_p = 0;
    }
}


//------------------------------------------------------------------------------
//"sc_thread_process::signal_monitors"
//
// This methods signals the list of monitors for this object instance.
//------------------------------------------------------------------------------
void sc_thread_process::signal_monitors(int type)
{
    int mon_n;  // # of monitors present.

    mon_n = m_monitor_q.size();
    for ( int mon_i = 0; mon_i < mon_n; mon_i++ )
        m_monitor_q[mon_i]->signal(this, type);
}


//------------------------------------------------------------------------------
//"sc_thread_process::suspend_process"
//
// This virtual method suspends this process and its children if requested to.
//     descendants = indicator of whether this process' children should also
//                   be suspended
//------------------------------------------------------------------------------
void sc_thread_process::suspend_process(
    sc_descendant_inclusion_info descendants )
{

    // IF NEEDED PROPOGATE THE SUSPEND REQUEST THROUGH OUR DESCENDANTS:

    if ( descendants == SC_INCLUDE_DESCENDANTS )
    {
        const std::vector<sc_object*>& children = get_child_objects();
        int                            child_n  = children.size();

        for ( int child_i = 0; child_i < child_n; child_i++ )
        {
            sc_process_b* child_p = DCAST<sc_process_b*>(children[child_i]);
            if ( child_p ) child_p->suspend_process(descendants);
        }
    }

    // CORNER CASE CHECKS, THE FOLLOWING ARE ERRORS:
    //   (a) if this thread has a reset_signal_is specification
    //   (b) if this thread is in synchronous reset

    if ( !sc_allow_process_control_corners && m_has_reset_signal )
    {
	report_error(SC_ID_PROCESS_CONTROL_CORNER_CASE_,
		     "attempt to suspend a thread that has a reset signal");
    }
    else if ( !sc_allow_process_control_corners && m_sticky_reset )
    {
	report_error(SC_ID_PROCESS_CONTROL_CORNER_CASE_,
		     "attempt to suspend a thread in synchronous reset");
    }

    // SUSPEND OUR OBJECT INSTANCE:
    //
    // (1) If we are on the runnable queue then set suspended and ready_to_run,
    //     and remove ourselves from the run queue.
    // (2) If this is a self-suspension then a resume should cause immediate
    //     scheduling of the process, and we need to call suspend_me() here.

    m_state = m_state | ps_bit_suspended;
    if ( next_runnable() != 0 )
    {
	m_state = m_state | ps_bit_ready_to_run;
	simcontext()->remove_runnable_thread( this );
    }
    if ( sc_get_current_process_b() == DCAST<sc_process_b*>(this)  )
    {
	m_state = m_state | ps_bit_ready_to_run;
	suspend_me();
    }
}

//------------------------------------------------------------------------------
//"sc_thread_process::throw_reset"
//
// This virtual method is invoked when an reset is to be thrown. The
// method will cancel any dynamic waits. If the reset is asynchronous it will
// queue this object instance to be executed.
//------------------------------------------------------------------------------
void sc_thread_process::throw_reset( bool async )
{
    // IF THE PROCESS IS CURRENTLY UNWINDING OR IS ALREADY A ZOMBIE
    // IGNORE THE RESET:

    if ( m_unwinding )
    {
        SC_REPORT_WARNING( SC_ID_PROCESS_ALREADY_UNWINDING_, name() );
        return;
    }

    if ( m_state & ps_bit_zombie )
        return;


    // Set the throw type and clear any pending dynamic events:

    m_throw_status = async ? THROW_ASYNC_RESET : THROW_SYNC_RESET;
    m_wait_cycle_n = 0;

    // If this is an asynchronous reset:
    //
    //   (a) Cancel any dynamic events
    //   (b) Set the thread up for execution:
    //         (i) If we are in the execution phase do it now.
    //         (ii) If we are not queue it to execute next when we hit
    //              the execution phase.

    if ( async )
    {
        m_state = m_state & ~ps_bit_ready_to_run;
        remove_dynamic_events();
	if ( simcontext()->evaluation_phase() )
	{
            simcontext()->preempt_with( this );
	}
	else
	{
	    if ( is_runnable() )
	        simcontext()->remove_runnable_thread(this);
	    simcontext()->execute_thread_next(this);
	}
    }
}


//------------------------------------------------------------------------------
//"sc_thread_process::throw_user"
//
// This virtual method is invoked when a user exception is to be thrown.
// If requested it will also throw the exception to the children of this
// object instance. The order of dispatch for the processes that are
// thrown the exception is from youngest child to oldest child and then
// this process instance. This means that this instance will be pushed onto
// the front of the simulator's runnable queue and then the children will
// be processed recursively.
//     helper_p    =  helper object to use to throw the exception.
//     descendants =  indicator of whether this process' children should also
//                    be suspended
//------------------------------------------------------------------------------
void sc_thread_process::throw_user( const sc_throw_it_helper& helper,
    sc_descendant_inclusion_info descendants )
{

    // IF THE SIMULATION IS NOT ACTAULLY RUNNING THIS IS AN ERROR:

    if ( sc_get_status() != SC_RUNNING )
    {
        report_error( SC_ID_THROW_IT_WHILE_NOT_RUNNING_ );
    }

    // IF NEEDED PROPOGATE THE THROW REQUEST THROUGH OUR DESCENDANTS:

    if ( descendants == SC_INCLUDE_DESCENDANTS )
    {
        const std::vector<sc_object*> children = get_child_objects();
        int                           child_n  = children.size();

        for ( int child_i = 0; child_i < child_n; child_i++ )
        {
            sc_process_b* child_p = DCAST<sc_process_b*>(children[child_i]);
            if ( child_p )
	    {
	        DEBUG_MSG(DEBUG_NAME,child_p,"about to throw user on");
	        child_p->throw_user(helper, descendants);
	    }
        }
    }

    // IF THE PROCESS IS CURRENTLY UNWINDING IGNORE THE THROW:

    if ( m_unwinding )
    {
        SC_REPORT_WARNING( SC_ID_PROCESS_ALREADY_UNWINDING_, name() );
	return;
    }

    // SET UP THE THROW REQUEST FOR THIS OBJECT INSTANCE AND QUEUE IT FOR
    // EXECUTION:

    if( m_has_stack )
    {
        remove_dynamic_events();
        DEBUG_MSG(DEBUG_NAME,this,"throwing user exception to");
        m_throw_status = THROW_USER;
        if ( m_throw_helper_p != 0 ) delete m_throw_helper_p;
        m_throw_helper_p = helper.clone();
        simcontext()->preempt_with( this );
    }
    else
    {
        SC_REPORT_WARNING( SC_ID_THROW_IT_IGNORED_, name() );
    }
}


//------------------------------------------------------------------------------
//"sc_thread_process::trigger_dynamic"
//
// This method sets up a dynamic trigger on an event.
//
// Notes:
//   (1) This method is identical to sc_method_process::trigger_dynamic(),
//       but they cannot be combined as sc_process_b::trigger_dynamic()
//       because the signatures things like sc_event::remove_dynamic()
//       have different overloads for sc_thread_process* and sc_method_process*.
//       So if you change code here you'll also need to change it in
//       sc_method_process.cpp.
//
// Result is true if this process should be removed from the event's list,
// false if not.
//------------------------------------------------------------------------------
bool sc_thread_process::trigger_dynamic( sc_event* e )
{
    // No time outs yet, and keep gcc happy.

    m_timed_out = false;

    // Escape cases:
    //   (a) If this thread issued the notify() don't schedule it for
    //       execution, but leave the sensitivity in place.
    //   (b) If this thread is already runnable can't trigger an event.

    // not possible for thread processes!
#if 0 // ! defined( SC_ENABLE_IMMEDIATE_SELF_NOTIFICATIONS )
    if ( sc_get_current_process_b() == (sc_process_b*)this )
    {
        report_immediate_self_notification();
        return false;
    }
#endif // SC_ENABLE_IMMEDIATE_SELF_NOTIFICATIONS

    if( is_runnable() )
        return true;

    // If a process is disabled then we ignore any events, leaving them enabled:
    //
    // But if this is a time out event we need to remove both it and the
    // event that was being waited for.

    if ( m_state & ps_bit_disabled )
    {
        if ( e == m_timeout_event_p )
	{
	    remove_dynamic_events( true );
	    return true;
	}
	else
	{
	    return false;
	}
    }


    // Process based on the event type and current process state:
    //
    // Every case needs to set 'rc' and continue on to the end of
    // this method to allow suspend processing to work correctly.

    switch( m_trigger_type )
    {
      case EVENT:
	m_event_p = 0;
	m_trigger_type = STATIC;
	break;

      case AND_LIST:
        -- m_event_count;
	if ( m_event_count == 0 )
	{
	    m_event_list_p->auto_delete();
	    m_event_list_p = 0;
	    m_trigger_type = STATIC;
	}
	else
	{
	    return true;
	}
	break;

      case OR_LIST:
	m_event_list_p->remove_dynamic( this, e );
	m_event_list_p->auto_delete();
	m_event_list_p = 0;
	m_trigger_type = STATIC;
	break;

      case TIMEOUT:
	m_trigger_type = STATIC;
	break;

      case EVENT_TIMEOUT:
        if ( e == m_timeout_event_p )
	{
	    m_timed_out = true;
	    m_event_p->remove_dynamic( this );
	    m_event_p = 0;
	    m_trigger_type = STATIC;
	}
	else
	{
	    m_timeout_event_p->cancel();
	    m_timeout_event_p->reset();
	    m_event_p = 0;
	    m_trigger_type = STATIC;
	}
	break;

      case OR_LIST_TIMEOUT:
        if ( e == m_timeout_event_p )
	{
            m_timed_out = true;
            m_event_list_p->remove_dynamic( this, e );
            m_event_list_p->auto_delete();
            m_event_list_p = 0;
            m_trigger_type = STATIC;
	}

	else
	{
            m_timeout_event_p->cancel();
            m_timeout_event_p->reset();
	    m_event_list_p->remove_dynamic( this, e );
	    m_event_list_p->auto_delete();
	    m_event_list_p = 0;
	    m_trigger_type = STATIC;
	}
	break;

      case AND_LIST_TIMEOUT:
        if ( e == m_timeout_event_p )
	{
            m_timed_out = true;
            m_event_list_p->remove_dynamic( this, e );
            m_event_list_p->auto_delete();
            m_event_list_p = 0;
            m_trigger_type = STATIC;
	}

	else
	{
	    -- m_event_count;
	    if ( m_event_count == 0 )
	    {
		m_timeout_event_p->cancel();
		m_timeout_event_p->reset();
		// no need to remove_dynamic
		m_event_list_p->auto_delete();
		m_event_list_p = 0;
		m_trigger_type = STATIC;
	    }
	    else
	    {
	        return true;
	    }
	}
	break;

      case STATIC: {
        // we should never get here, but throw_it() can make it happen.
	SC_REPORT_WARNING(SC_ID_NOT_EXPECTING_DYNAMIC_EVENT_NOTIFY_, name());
        return true;
      }
    }

    // If we get here then the thread is has satisfied its wait criteria, if
    // its suspended mark its state as ready to run. If its not suspended then
    // push it onto the runnable queue.

    if ( (m_state & ps_bit_suspended) )
    {
	m_state = m_state | ps_bit_ready_to_run;
    }
    else
    {
        simcontext()->push_runnable_thread(this);
    }

    return true;
}


//------------------------------------------------------------------------------
//"sc_set_stack_size"
//
//------------------------------------------------------------------------------
void
sc_set_stack_size( sc_thread_handle thread_h, std::size_t size )
{
    thread_h->set_stack_size( size );
}

#undef DEBUG_MSG
#undef DEBUG_NAME

} // namespace sc_core


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

  MODIFICATION LOG - modifiers, enter your name, affiliation, date and
  changes you are making here.

      Name, Affiliation, Date:
  Description of Modification:

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

// $Log: sc_thread_process.cpp,v $
// Revision 1.57  2011/08/24 22:05:51  acg
//  Torsten Maehne: initialization changes to remove warnings.
//
// Revision 1.56  2011/08/07 19:08:04  acg
//  Andy Goodrich: moved logs to end of file so line number synching works
//  better between versions.
//
// Revision 1.55  2011/08/04 17:16:22  acg
//  Philipp A. Hartmann: fix handling of child objects in kill routine, need
//  to use a copy rather than a reference.
//
// Revision 1.53  2011/07/29 22:45:38  acg
//  Philipp A. Hartmann: changes to handle case where a process control
//  invocation on a child process causes the list of child processes to change.
//
// Revision 1.52  2011/07/24 11:27:04  acg
//  Andy Goodrich: moved the check for unwinding processes until after the
//  descendants have been processed in throw_user and kill.
//
// Revision 1.51  2011/07/24 11:20:03  acg
//  Philipp A. Hartmann: process control error message improvements:
//  (1) Downgrade error to warning for re-kills of processes.
//  (2) Add process name to process messages.
//  (3) drop some superfluous colons in messages.
//
// Revision 1.50  2011/05/09 04:07:49  acg
//  Philipp A. Hartmann:
//    (1) Restore hierarchy in all phase callbacks.
//    (2) Ensure calls to before_end_of_elaboration.
//
// Revision 1.49  2011/05/05 17:45:27  acg
//  Philip A. Hartmann: changes in WIN64 support.
//  Andy Goodrich: additional DEBUG_MSG instances to trace process handling.
//
// Revision 1.48  2011/04/19 15:04:27  acg
//  Philipp A. Hartmann: clean up SC_ID messages.
//
// Revision 1.47  2011/04/19 02:39:09  acg
//  Philipp A. Hartmann: added checks for additional throws during stack unwinds.
//
// Revision 1.46  2011/04/14 22:33:43  acg
//  Andy Goodrich: added missing checks for a process being a zombie.
//
// Revision 1.45  2011/04/13 02:45:11  acg
//  Andy Goodrich: eliminated warning message that occurred if the DEBUG_MSG
//  macro was used.
//
// Revision 1.44  2011/04/11 22:04:33  acg
//  Andy Goodrich: use the DEBUG_NAME macro for DEBUG_MSG messages.
//
// Revision 1.43  2011/04/10 22:12:32  acg
//  Andy Goodrich: adding debugging macros.
//
// Revision 1.42  2011/04/08 22:40:26  acg
//  Andy Goodrich: moved the reset event notification code out of throw_reset()
//  and into suspend_me.
//
// Revision 1.41  2011/04/08 18:24:07  acg
//  Andy Goodrich: fix asynchronous reset dispatch and when the reset_event()
//  is fired.
//
// Revision 1.40  2011/04/05 20:50:57  acg
//  Andy Goodrich:
//    (1) changes to make sure that event(), posedge() and negedge() only
//        return true if the clock has not moved.
//    (2) fixes for method self-resumes.
//    (3) added SC_PRERELEASE_VERSION
//    (4) removed kernel events from the object hierarchy, added
//        sc_hierarchy_name_exists().
//
// Revision 1.39  2011/04/01 22:30:39  acg
//  Andy Goodrich: change hard assertion to warning for trigger_dynamic()
//  getting called when there is only STATIC sensitivity. This can result
//  because of sc_process_handle::throw_it().
//
// Revision 1.38  2011/03/23 16:17:52  acg
//  Andy Goodrich: don't emit an error message for a resume on a disabled
//  process that is not suspended.
//
// Revision 1.37  2011/03/20 13:43:23  acg
//  Andy Goodrich: added async_signal_is() plus suspend() as a corner case.
//
// Revision 1.36  2011/03/08 20:49:31  acg
//  Andy Goodrich: implement coarse checking for synchronous reset - suspend
//  interaction.
//
// Revision 1.35  2011/03/08 20:32:28  acg
//  Andy Goodrich: implemented "coarse" checking for undefined process
//  control interactions.
//
// Revision 1.34  2011/03/07 18:25:19  acg
//  Andy Goodrich: tightening of check for resume on a disabled process to
//  only produce an error if it is ready to run.
//
// Revision 1.33  2011/03/07 17:38:44  acg
//  Andy Goodrich: tightening up of checks for undefined interaction between
//  synchronous reset and suspend.
//
// Revision 1.32  2011/03/06 23:30:13  acg
//  Andy Goodrich: refining suspend - sync reset corner case checking so that
//  the following are error situations:
//    (1) Calling suspend on a process with a reset_signal_is() specification
//        or sync_reset_on() is active.
//    (2) Calling sync_reset_on() on a suspended process.
//
// Revision 1.31  2011/03/06 19:57:11  acg
//  Andy Goodrich: refinements for the illegal suspend - synchronous reset
//  interaction.
//
// Revision 1.30  2011/03/06 16:47:09  acg
//  Andy Goodrich: changes for testing sync_reset - suspend corner cases.
//
// Revision 1.29  2011/03/06 15:59:23  acg
//  Andy Goodrich: added process control corner case checks.
//
// Revision 1.28  2011/03/05 19:44:20  acg
//  Andy Goodrich: changes for object and event naming and structures.
//
// Revision 1.27  2011/02/19 08:30:53  acg
//  Andy Goodrich: Moved process queueing into trigger_static from
//  sc_event::notify.
//
// Revision 1.26  2011/02/18 20:27:14  acg
//  Andy Goodrich: Updated Copyrights.
//
// Revision 1.25  2011/02/17 19:54:33  acg
//  Andy Goodrich:
//    (1) Changed signature of trigger_dynamic() back to bool, and moved
//        run queue processing into trigger_dynamic.
//    (2) Simplified process control usage.
//
// Revision 1.24  2011/02/16 22:37:31  acg
//  Andy Goodrich: clean up to remove need for ps_disable_pending.
//
// Revision 1.23  2011/02/14 17:51:40  acg
//  Andy Goodrich: proper pushing an poppping of the module hierarchy for
//  start_of_simulation() and end_of_simulation.
//
// Revision 1.22  2011/02/13 23:09:58  acg
//  Andy Goodrich: only remove dynamic events for asynchronous resets.
//
// Revision 1.21  2011/02/13 21:47:38  acg
//  Andy Goodrich: update copyright notice.
//
// Revision 1.20  2011/02/13 21:37:13  acg
//  Andy Goodrich: removed temporary diagnostic. Also there is
//  remove_dynamic_events() call in reset code.
//
// Revision 1.19  2011/02/13 21:35:09  acg
//  Andy Goodrich: added error messages for throws before the simulator is
//  initialized.
//
// Revision 1.18  2011/02/11 13:25:24  acg
//  Andy Goodrich: Philipp A. Hartmann's changes:
//    (1) Removal of SC_CTHREAD method overloads.
//    (2) New exception processing code.
//
// Revision 1.17  2011/02/08 08:18:16  acg
//  Andy Goodrich: removed obsolete code.
//
// Revision 1.16  2011/02/07 19:17:20  acg
//  Andy Goodrich: changes for IEEE 1666 compatibility.
//
// Revision 1.15  2011/02/04 15:27:36  acg
//  Andy Goodrich: changes for suspend-resume semantics.
//
// Revision 1.14  2011/02/01 23:01:53  acg
//  Andy Goodrich: removed dead code.
//
// Revision 1.13  2011/02/01 21:16:36  acg
//  Andy Goodrich:
//  (1) New version of trigger_dynamic() to implement new return codes and
//      proper processing of events with new dynamic process rules.
//  (2) Recoding of kill_process(), throw_user() and reset support to
//      consolidate preemptive thread execution in sc_simcontext::preempt_with().
//
// Revision 1.12  2011/01/25 20:50:37  acg
//  Andy Goodrich: changes for IEEE 1666 2011.
//
// Revision 1.11  2011/01/20 16:52:20  acg
//  Andy Goodrich: changes for IEEE 1666 2011.
//
// Revision 1.10  2011/01/19 23:21:50  acg
//  Andy Goodrich: changes for IEEE 1666 2011
//
// Revision 1.9  2011/01/18 20:10:45  acg
//  Andy Goodrich: changes for IEEE1666_2011 semantics.
//
// Revision 1.8  2011/01/06 18:02:16  acg
//  Andy Goodrich: added check for disabled thread to trigger_dynamic().
//
// Revision 1.7  2010/11/20 17:10:57  acg
//  Andy Goodrich: reset processing changes for new IEEE 1666 standard.
//
// Revision 1.6  2010/07/22 20:02:33  acg
//  Andy Goodrich: bug fixes.
//
// Revision 1.5  2009/07/28 01:10:53  acg
//  Andy Goodrich: updates for 2.3 release candidate.
//
// Revision 1.4  2009/05/22 16:06:29  acg
//  Andy Goodrich: process control updates.
//
// Revision 1.3  2008/05/22 17:06:06  acg
//  Andy Goodrich: formatting and comments.
//
// Revision 1.2  2007/09/20 20:32:35  acg
//  Andy Goodrich: changes to the semantics of throw_it() to match the
//  specification. A call to throw_it() will immediately suspend the calling
//  thread until all the throwees have executed. At that point the calling
//  thread will be restarted before the execution of any other threads.
//
// Revision 1.1.1.1  2006/12/15 20:20:05  acg
// SystemC 2.3
//
// Revision 1.8  2006/04/20 17:08:17  acg
//  Andy Goodrich: 3.0 style process changes.
//
// Revision 1.7  2006/04/11 23:13:21  acg
//   Andy Goodrich: Changes for reduced reset support that only includes
//   sc_cthread, but has preliminary hooks for expanding to method and thread
//   processes also.
//
// Revision 1.6  2006/03/21 00:00:34  acg
//   Andy Goodrich: changed name of sc_get_current_process_base() to be
//   sc_get_current_process_b() since its returning an sc_process_b instance.
//
// Revision 1.5  2006/01/26 21:04:55  acg
//  Andy Goodrich: deprecation message changes and additional messages.
//
// Revision 1.4  2006/01/24 20:49:05  acg
// Andy Goodrich: changes to remove the use of deprecated features within the
// simulator, and to issue warning messages when deprecated features are used.
//
// Revision 1.3  2006/01/13 18:44:30  acg
// Added $Log to record CVS changes into the source.
//