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/* $Id: runtime.h 5110 2012-03-08 22:24:17Z potyra $
*
* C-Code kernel / runtime library.
*
* Copyright (C) 2010 FAUmachine Team <info@faumachine.org>.
* This program is free software. You can redistribute it and/or modify it
* under the terms of the GNU General Public License, either version 2 of
* the License, or (at your option) any later version. See COPYING.
*/
/* FIXME: name too generic?
* FIXME: cleanup between stuff in interpreter and this file.
*/
#ifndef __RUNTIME_H_INCLUDED
#define __RUNTIME_H_INCLUDED
#include <basetypes.h>
#include <assert.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <pthread.h>
#include <stdbool.h>
#include <slset.h>
#include <errno.h>
#define ALWAYS_INLINE inline __attribute__((__always_inline__))
union vhdl_value {
universal_integer univ_int;
universal_integer univ_real;
};
struct vhdl_kernel {
struct slset *signals;
struct slset *processes;
universal_integer sim_time;
struct slset *drivers;
struct slset *run_q;
struct slset *wait_q;
struct slset *create_q;
};
struct vhdl_process {
pthread_t thread;
pthread_mutex_t sleeping;
struct slset *sensitivities;
universal_integer next_event;
void *stack_frame;
};
struct signal {
union vhdl_value value;
struct slset *connected_drivers;
bool event;
/* FIXME resolution function */
};
struct drv_trans {
universal_integer sim_time;
union vhdl_value val;
};
struct driver {
union vhdl_value driving_value;
struct signal *connected_signal;
bool active;
struct slset *transactions;
};
static ALWAYS_INLINE universal_integer
signal_read_int(const struct signal *sig)
{
return sig->value.univ_int;
}
static ALWAYS_INLINE universal_real
signal_read_real(const struct signal *sig)
{
return sig->value.univ_real;
}
static ALWAYS_INLINE struct signal *
signal_create(struct vhdl_kernel *kernel, const char *name)
{
struct signal *sig = malloc(sizeof(struct signal));
assert(sig != NULL);
/* FIXME initial value */
sig->value.univ_int = 0;
sig->connected_drivers = slset_create(NULL, malloc);
sig->event = false;
slset_add(kernel->signals, sig, malloc);
return sig;
}
static int
__attribute__((__pure__))
drv_trans_compare(const void *_t1, const void *_t2)
{
const struct drv_trans *t1 = (const struct drv_trans *)_t1;
const struct drv_trans *t2 = (const struct drv_trans *)_t2;
if (t1->sim_time < t2->sim_time) {
return -1;
}
if (t1->sim_time == t2->sim_time) {
return 0;
}
return 1;
}
static ALWAYS_INLINE struct driver *
driver_create(struct vhdl_kernel *kernel)
{
struct driver *drv = malloc(sizeof(struct driver));
assert(drv != NULL);
/* FIXME initial value */
drv->driving_value.univ_int = 0;
drv->connected_signal = NULL;
drv->transactions = slset_create(drv_trans_compare, malloc);
drv->active = false;
slset_add(kernel->drivers, drv, malloc);
return drv;
}
static ALWAYS_INLINE void
driver_connect(struct driver *drv, struct signal *s)
{
assert(drv != NULL);
assert(s != NULL);
slset_add(s->connected_drivers, drv, malloc);
drv->connected_signal = s;
}
static ALWAYS_INLINE void
driver_update_int_after(
struct driver *drv,
universal_integer sim_time,
universal_integer value
)
{
struct drv_trans *t = malloc(sizeof(struct drv_trans));
assert(t != NULL);
t->sim_time = sim_time;
t->val.univ_int = value;
slset_truncate_at(drv->transactions, t, true, free);
slset_add(drv->transactions, t, malloc);
}
static ALWAYS_INLINE void
driver_update_real_after(
struct driver *drv,
universal_integer sim_time,
universal_real value
)
{
struct drv_trans *t = malloc(sizeof(struct drv_trans));
assert(t != NULL);
t->sim_time = sim_time;
t->val.univ_real = value;
slset_truncate_at(drv->transactions, t, true, free);
slset_add(drv->transactions, t, malloc);
}
static ALWAYS_INLINE struct vhdl_process *
sched_create_process(
struct vhdl_kernel *kernel,
void *sf,
void *(*fun)(void *)
)
{
struct vhdl_process *proc = malloc(sizeof(struct vhdl_process));
int ret;
assert(proc != NULL);
proc->sensitivities = slset_create(NULL, malloc);
proc->next_event = INT64_MAX;
proc->stack_frame = sf;
do {
ret = pthread_mutex_init(&proc->sleeping, NULL);
assert((ret == 0) || (ret == EAGAIN));
} while (ret == EAGAIN);
slset_add(kernel->create_q, proc, malloc);
return proc;
}
static ALWAYS_INLINE void
sched_wake_on(struct vhdl_process *proc, struct signal *sensitivity)
{
slset_add(proc->sensitivities, sensitivity, malloc);
}
static ALWAYS_INLINE void
sched_suspend(struct vhdl_kernel *kernel, struct vhdl_process *proc)
{
int ret;
ret = pthread_mutex_lock(&proc->sleeping);
/* FIXME decrease *shared* number of running processes */
assert(ret == 0);
}
static ALWAYS_INLINE void
sched_abort(void)
{
/* FIXME */
}
static ALWAYS_INLINE void
vhdl_log(universal_integer severity, universal_integer c)
{
switch (severity) {
case 3: /* failure */
fprintf(stdout, "FAILURE: ");
break;
case 2: /* error */
fprintf(stdout, "ERROR: ");
break;
case 1: /* warning */
fprintf(stdout, "WARNING: ");
break;
case 0: /* note */
fprintf(stdout, "NOTE: ");
break;
default:
break;
}
fprintf(stdout, "%c", (int)c);
}
#endif /* __RUNTIME_H_INCLUDED */
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