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/* sched.h -- Abstract entities header file handling job scheduler
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/* sched.h -- Abstract entities header file handling job scheduler
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Copyright (C) 2001 Marko Mlinar, markom@opencores.org
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Copyright (C) 2001 Marko Mlinar, markom@opencores.org
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Copyright (C) 2005 György `nog' Jeney, nog@sdf.lonestar.org
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This file is part of OpenRISC 1000 Architectural Simulator.
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This file is part of OpenRISC 1000 Architectural Simulator.
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This program is free software; you can redistribute it and/or modify
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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it under the terms of the GNU General Public License as published by
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#ifndef _SCHED_H_
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#ifndef _SCHED_H_
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#define _SCHED_H_
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#define _SCHED_H_
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#include "debug.h"
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/* Scheduler debug level */
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/* Scheduler debug level */
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#define SCHED_DEBUG 0
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#define SCHED_DEBUG 0
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#define SCHED_HEAP_SIZE 128
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#define SCHED_HEAP_SIZE 128
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#define SCHED_TIME_MAX 0x7fffffffffffffffLL
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#define SCHED_TIME_MAX INT32_MAX
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DECLARE_DEBUG_CHANNEL(sched);
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/* Structure for holding one job entry */
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/* Structure for holding one job entry */
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struct sched_entry {
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struct sched_entry {
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long long time; /* Clock cycles before job starts */
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int32_t time; /* Clock cycles before job starts */
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void *param; /* Parameter to pass to the function */
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void *param; /* Parameter to pass to the function */
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void (*func)(void *); /* Function to call when time reaches 0 */
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void (*func)(void *); /* Function to call when time reaches 0 */
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struct sched_entry *next;
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};
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};
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/* Heap of jobs */
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/* Heap of jobs */
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struct scheduler_struct {
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struct scheduler_struct {
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int size;
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struct sched_entry *free_job_queue;
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struct sched_entry heap[SCHED_HEAP_SIZE];
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struct sched_entry *job_queue;
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};
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};
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extern struct scheduler_struct scheduler;
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void sched_init(void);
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void sched_reset(void);
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/* Dummy function, representing a guard, which protects heap from
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extern struct scheduler_struct scheduler;
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emptying */
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extern void sched_guard (void *);
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/* Init scheduler -- clear the heap */
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#define SCHED_INIT() {\
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scheduler.heap[1].func = sched_guard;\
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scheduler.heap[1].time = SCHED_TIME_MAX;\
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scheduler.size = 2;\
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}
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#if SCHED_DEBUG > 1
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#if SCHED_DEBUG > 1
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#define SCHED_PRINT_JOBS() {\
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#define SCHED_PRINT_JOBS() sched_print_jobs()
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int i;\
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static inline void sched_print_jobs(void)
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for (i = 1; i < scheduler.size; i++) \
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{
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PRINTF ("\t%i: %x $%i @ %i\n", i, scheduler.heap[i].func, scheduler.heap[i].param, scheduler.heap[i].time);\
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struct sched_entry *cur;
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int i;
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for (cur = scheduler.job_queue, i = 0; cur; cur = cur->next, i++)
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TRACE_(sched)("\t%i: %p $%p @ %"PRIi32"\n", i, cur->func, cur->param,
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cur->time);
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}
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}
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#else
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#else
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#define SCHED_PRINT_JOBS()
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#define SCHED_PRINT_JOBS()
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#endif
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#endif
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/* Adds new job to the queue */
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/* Adds new job to the queue */
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static inline void sched_add(void (*job_func)(void *), void *job_param,
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static inline void sched_add(void (*job_func)(void *), void *job_param,
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long long job_time, const char *func)
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int32_t job_time, const char *func)
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{
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{
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int i;
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struct sched_entry *cur, *prev, *new_job;
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int32_t alltime;
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if (SCHED_DEBUG > 0)
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if (SCHED_DEBUG > 1)
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PRINTF ("%s@%lli:SCHED_ADD(func %p, param %p, time %lli)\n", func,
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TRACE_(sched)("%s@%lli:SCHED_ADD(time %"PRIi32")\n", func,
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runtime.sim.cycles, job_func, job_param, job_time);
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runtime.sim.cycles, job_time);
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SCHED_PRINT_JOBS();
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SCHED_PRINT_JOBS();
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if (SCHED_DEBUG > 1) PRINTF ("--------\n");\
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if (SCHED_DEBUG > 1) TRACE_(sched) ("--------\n");
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i = scheduler.size++;
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cur = scheduler.job_queue;
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while (i > 1 && scheduler.heap[i / 2].time > job_time) {
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prev = NULL;
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scheduler.heap[i] = scheduler.heap[i / 2];
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alltime = cur->time;
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i /= 2;
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while(cur && (alltime < job_time)) {
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prev = cur;
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cur = cur->next;
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if(cur)
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alltime += cur->time;
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}
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new_job = scheduler.free_job_queue;
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scheduler.free_job_queue = new_job->next;
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new_job->next = cur;
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new_job->func = job_func;
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new_job->param = job_param;
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if(prev) {
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new_job->time = job_time - (alltime - (cur ? cur->time : 0));
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prev->next = new_job;
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TRACE_(sched)("Scheduled job not going to head of queue, relative time: %"
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PRIi32"\n", new_job->time);
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} else {
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scheduler.job_queue = new_job;
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new_job->time = job_time;
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#if DYNAMIC_EXECUTION
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/* If we are replaceing the first job in the queue, then update the
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* recompiler's internal cycle counter */
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set_sched_cycle(job_time);
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#endif
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TRACE_(sched)("Setting to-go cycles to %"PRIi32" at %lli\n", job_time,
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runtime.sim.cycles);
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}
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}
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scheduler.heap[i].func = job_func;
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if(cur)
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scheduler.heap[i].param = job_param;
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cur->time -= new_job->time;
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scheduler.heap[i].time = job_time;
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SCHED_PRINT_JOBS();
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SCHED_PRINT_JOBS();
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}
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}
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#define SCHED_ADD(job_func, job_param, job_time) sched_add(job_func, job_param, job_time, __FUNCTION__)
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#define SCHED_ADD(job_func, job_param, job_time) sched_add(job_func, job_param, job_time, __FUNCTION__)
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/* Removes an item from the heap */
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/* Returns a job with specified function and param, NULL if not found */
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#define SCHED_REMOVE_ITEM(index) {\
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static inline void sched_find_remove(void (*job_func)(void *), void *dat,
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struct sched_entry *tmp;\
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const char *func)
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int ___i = (index), ___j;\
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{
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if (SCHED_DEBUG > 0) PRINTF ("%s@%i:SCHED_REMOVE%i(time %li)\n", __FUNCTION__, runtime.sim.cycles, (index), scheduler.heap[___i].time); \
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struct sched_entry *cur;
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SCHED_PRINT_JOBS();\
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struct sched_entry *prev = NULL;
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if (SCHED_DEBUG > 1) PRINTF ("--------\n");\
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tmp = &scheduler.heap[--scheduler.size];\
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while (___i <= scheduler.size / 2) {\
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___j = 2 * ___i;\
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if (___j < scheduler.size && scheduler.heap[___j].time > scheduler.heap[___j + 1].time) ___j++;\
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if (scheduler.heap[___j].time >= tmp->time) break;\
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scheduler.heap[___i] = scheduler.heap[___j];\
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___i = ___j;\
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}\
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scheduler.heap[___i] = *tmp;\
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SCHED_PRINT_JOBS();\
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}
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/* Removes first item from the heap */
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#define SCHED_REMOVE() SCHED_REMOVE_ITEM(1)
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/* Returns item with lowest time in the heap */
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TRACE_(sched)("%s@%lli:SCHED_REMOVE()\n", func, runtime.sim.cycles);
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#define SCHED_PEEK() scheduler.heap[1]
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/* Returns a job with specified function and param, NULL if not found */
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for (cur = scheduler.job_queue; cur; prev = cur, cur = cur->next) {
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#define SCHED_FIND(f, p) ({\
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if ((cur->func == job_func) && (cur->param == dat)) {
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int i;\
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if(cur->next)
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struct sched_entry *t = NULL;\
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cur->next->time += cur->time;
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for (i = 1; i < scheduler.size; i++)\
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if (scheduler.heap[i].func == (f) && scheduler.heap[i].param == (p)) {\
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if(prev) {
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t = &scheduler.heap[i]; break;\
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prev->next = cur->next;
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}\
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} else {
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tmp;\
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scheduler.job_queue = cur->next;
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})
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#if DYNAMIC_EXECUTION
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if(cur->next)
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/* Returns a index of the job with specified function and param, 0 if not found */
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set_sched_cycle(cur->next->time);
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#define SCHED_FIND_INDEX(f, p) ({\
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#endif
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int i, found = 0;\
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if(cur->next)
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for (i = 1; i < scheduler.size; i++)\
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TRACE_(sched)("Setting to-go cycles to %"PRIi32" at %lli\n",
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if (scheduler.heap[i].func == (f) && scheduler.heap[i].param == (p)) {\
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cur->next->time, runtime.sim.cycles);
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found = i; break;\
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}
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}\
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cur->next = scheduler.free_job_queue;
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found;\
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scheduler.free_job_queue = cur;
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})
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break;
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}
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}
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}
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/* Deletes job with specified function and param */
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/* Deletes job with specified function and param */
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#define SCHED_FIND_REMOVE(f, p) {\
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#define SCHED_FIND_REMOVE(f, p) sched_find_remove(f, p, __FUNCTION__)
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int index;\
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index = SCHED_FIND_INDEX(f, p);\
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if (index) SCHED_REMOVE_ITEM(index);\
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}
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#endif /* _SCHED_H_ */
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#endif /* _SCHED_H_ */
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