204 lines
6.9 KiB
C
204 lines
6.9 KiB
C
#ifndef __schedule_H
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#define __schedule_H
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/*
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* Copyright (c) 2001-2003 Stephen Williams (steve@icarus.com)
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*
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* This source code is free software; you can redistribute it
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* and/or modify it in source code form under the terms of the GNU
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* General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CVS_IDENT
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#ident "$Id: schedule.h,v 1.29 2007/01/16 05:44:16 steve Exp $"
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#endif
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# include "vthread.h"
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# include "pointers.h"
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# include "vvp_net.h"
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# include "memory.h"
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# include "array.h"
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/*
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* This causes a thread to be scheduled for execution. The schedule
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* puts the event into the event queue after any existing events for a
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* given time step. The delay is a relative time.
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*
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* If the delay is zero, the push_flag can be used to force the event
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* to the front of the queue. %fork uses this to get the thread
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* execution ahead of non-blocking assignments.
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*/
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extern void schedule_vthread(vthread_t thr, vvp_time64_t delay,
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bool push_flag =false);
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/*
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* Create an assignment event. The val passed here will be assigned to
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* the specified input when the delay times out. This is scheduled
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* like a non-blocking assignment. This is in fact mostly used to
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* implement the non-blocking assignment.
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*/
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extern void schedule_assign_vector(vvp_net_ptr_t ptr,
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unsigned base, unsigned vwid,
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const vvp_vector4_t&val,
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vvp_time64_t delay);
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extern void schedule_assign_vector(vvp_net_ptr_t ptr,
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const vvp_vector4_t&val,
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vvp_time64_t delay);
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extern void schedule_assign_array_word(vvp_array_t mem,
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unsigned word_address,
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unsigned off,
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vvp_vector4_t val,
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vvp_time64_t delay);
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extern void schedule_assign_memory_word(vvp_memory_t mem,
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unsigned word_address,
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unsigned off,
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vvp_vector4_t val,
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vvp_time64_t delay);
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/*
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* This is very similar to schedule_assign_vector, but generates an
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* event in the active queue. It is used at link time to set an initial
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* value (a compile time constant) to the input of a functor. This
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* creates an event in the active queue.
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*/
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extern void schedule_set_vector(vvp_net_ptr_t ptr, vvp_vector4_t val);
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extern void schedule_set_vector(vvp_net_ptr_t ptr, vvp_vector8_t val);
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extern void schedule_set_vector(vvp_net_ptr_t ptr, double val);
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/*
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* Create a generic event. This supports scheduled events that are not
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* any of the specific types above. The vvp_get_event_t points to a
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* function to be executed when the scheduler gets to the event. It is
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* up to the user to allocate/free the vvp_get_event_s object. The
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* object is never referenced by the scheduler after the run method is
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* called.
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*
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* The sync_flag is true if this is intended to be a sync event. These
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* are placed in the stratified event queue after nb assignes. If the
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* ro_flag is true as well, then it is a Read-only sync event, with
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* all that means.
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*
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* If the sync_flag is false, then the event is ACTIVE, and the
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* ro_flag is ignored.
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*/
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typedef struct vvp_gen_event_s *vvp_gen_event_t;
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extern void schedule_generic(vvp_gen_event_t obj, vvp_time64_t delay,
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bool sync_flag, bool ro_flag =true);
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struct vvp_gen_event_s
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{
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virtual ~vvp_gen_event_s() =0;
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virtual void run_run() =0;
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};
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/*
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* This runs the simulator. It runs until all the functors run out or
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* the simulation is otherwise finished.
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*/
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extern void schedule_simulate(void);
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/*
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* Get the current absolute simulation time. This is not used
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* internally by the scheduler (which uses time differences instead)
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* but is used for printouts and stuff.
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*/
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extern vvp_time64_t schedule_simtime(void);
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/*
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* This function is the equivalent of the $finish system task. It
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* tells the simulator that simulation is done, the current thread
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* should be stopped, all remaining events abandoned and the
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* schedule_simulate() function will return.
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*
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* The schedule_finished() function will return true if the
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* schedule_finish() function has been called.
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*/
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extern void schedule_finish(int rc);
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extern void schedule_stop(int rc);
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extern bool schedule_finished(void);
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extern bool schedule_stopped(void);
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/*
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* The scheduler calls this function to process stop events. When this
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* function returns, the simulation resumes.
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*/
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extern void stop_handler(int rc);
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/*
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* These are event counters for the sake of performance measurements.
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*/
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extern unsigned long count_assign_events;
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extern unsigned long count_gen_events;
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extern unsigned long count_prop_events;
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extern unsigned long count_thread_events;
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extern unsigned long count_event_pool;
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/*
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* $Log: schedule.h,v $
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* Revision 1.29 2007/01/16 05:44:16 steve
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* Major rework of array handling. Memories are replaced with the
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* more general concept of arrays. The NetMemory and NetEMemory
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* classes are removed from the ivl core program, and the IVL_LPM_RAM
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* lpm type is removed from the ivl_target API.
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*
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* Revision 1.28 2006/09/29 01:24:34 steve
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* rwsync callback fixes from Ben Staveley (with modifications.)
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*
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* Revision 1.27 2006/02/02 02:44:00 steve
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* Allow part selects of memory words in l-values.
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*
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* Revision 1.26 2005/09/20 18:34:02 steve
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* Clean up compiler warnings.
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*
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* Revision 1.25 2005/07/06 04:29:25 steve
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* Implement real valued signals and arith nodes.
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*
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* Revision 1.24 2005/06/22 18:30:12 steve
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* Inline more simple stuff, and more vector4_t by const reference for performance.
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*
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* Revision 1.23 2005/06/09 05:04:45 steve
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* Support UDP initial values.
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*
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* Revision 1.22 2005/06/02 16:02:11 steve
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* Add support for notif0/1 gates.
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* Make delay nodes support inertial delay.
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* Add the %force/link instruction.
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*
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* Revision 1.21 2005/05/07 03:15:42 steve
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* Implement non-blocking part assign.
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*
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* Revision 1.20 2005/03/06 17:07:48 steve
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* Non blocking assign to memory words.
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*
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* Revision 1.19 2005/02/12 03:26:14 steve
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* Support scheduling vvp_vector8_t objects.
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*
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* Revision 1.18 2005/01/29 17:53:25 steve
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* Use scheduler to initialize constant functor inputs.
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*
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* Revision 1.17 2004/12/11 02:31:30 steve
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* Rework of internals to carry vectors through nexus instead
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* of single bits. Make the ivl, tgt-vvp and vvp initial changes
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* down this path.
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*
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* Revision 1.16 2003/09/09 00:56:45 steve
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* Reimpelement scheduler to divide nonblocking assign queue out.
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*
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* Revision 1.15 2003/02/22 02:52:06 steve
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* Check for stopped flag in certain strategic points.
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*/
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#endif
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