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941 lines (817 loc) · 23.6 KB
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Copy pathceu_os.c
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941 lines (817 loc) · 23.6 KB
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/* TODO: #ifdef CEU_INTS: seqno, stki, CEU_STK */
#include "ceu_os.h"
#ifdef CEU_OS
#ifdef __AVR
#include <avr/pgmspace.h>
#include "Arduino.h"
#endif
void* CEU_APP_ADDR = NULL; /* TODO: only __AVR? */
#endif
#ifdef __AVR
#define ISR_ON interrupts()
#define ISR_OFF noInterrupts()
#else
#define ISR_ON
#define ISR_OFF
#endif
#include <string.h>
#ifdef CEU_DEBUG
#include <stdio.h> /* fprintf */
#include <assert.h>
#endif
#if defined(CEU_OS) || defined(CEU_DEBUG)
#include <stdlib.h> /* malloc/free, exit */
#endif
/* TODO: app */
#ifdef CEU_NEWS
#include "ceu_pool.h"
#endif
/*
* pthread_t thread;
* pthread_mutex_t mutex;
* pthread_cond_t cond;
* pthread_self();
Uint32 SDL_ThreadID(void);
* pthread_create(&thread, NULL, f, &p);
SDL_Thread *SDL_CreateThread(int (*fn)(void *), void *data);
* pthread_mutex_lock(&mutex);
* pthread_mutex_unlock(&mutex);
* pthread_cond_wait(&cond, &mutex);
* pthread_cond_signal(&cond);
*/
/**********************************************************************/
#ifdef CEU_NEWS
#ifdef CEU_RUNTESTS
#define CEU_MAX_DYNS 100
static int _ceu_dyns_ = 0; /* check if total of alloc/free match */
#endif
#endif
#if defined(CEU_NEWS) || defined(CEU_THREADS) || defined(CEU_OS)
void* ceu_sys_malloc (size_t size) {
#ifdef CEU_NEWS
#ifdef CEU_RUNTESTS
if (_ceu_dyns_ >= CEU_MAX_DYNS)
return NULL;
_ceu_dyns_++; /* assumes no malloc fails */
#endif
#endif
return malloc(size);
}
void ceu_sys_free (void* ptr) {
#ifdef CEU_NEWS
#ifdef CEU_RUNTESTS
if (ptr != NULL)
_ceu_dyns_--;
#endif
#endif
free(ptr);
}
#endif
/**********************************************************************/
void ceu_sys_org_init (tceu_org* org, int n, int lbl, int seqno,
tceu_org* par_org, int par_trl)
{
/* { evt=0, seqno=0, lbl=0 } for all trails */
memset(&org->trls, 0, n*sizeof(tceu_trl));
#if defined(CEU_ORGS) || defined(CEU_OS)
org->n = n;
#endif
#ifdef CEU_NEWS
org->isDyn = 0;
org->isSpw = 0;
#endif
/* org.trls[0] == org.blk.trails[1] */
org->trls[0].evt = CEU_IN__STK;
org->trls[0].lbl = lbl;
org->trls[0].seqno = seqno;
#ifdef CEU_ORGS
if (par_org == NULL)
return; /* main class */
/* re-link */
{
tceu_org_lnk* lst = &par_org->trls[par_trl].lnks[1];
lst->prv->nxt = org;
org->prv = lst->prv;
org->nxt = (tceu_org*)lst;
lst->prv = org;
}
#endif /* CEU_ORGS */
}
#ifndef CEU_ORGS
#define ceu_sys_org_init(a,b,c,d,e,f) ceu_sys_org_init(a,b,c,d,NULL,0)
#endif
/**********************************************************************/
#ifdef CEU_PSES
void ceu_pause (tceu_trl* trl, tceu_trl* trlF, int psed) {
do {
if (psed) {
if (trl->evt == CEU_IN__ORG)
trl->evt = CEU_IN__ORG_PSED;
} else {
if (trl->evt == CEU_IN__ORG_PSED)
trl->evt = CEU_IN__ORG;
}
if ( trl->evt == CEU_IN__ORG
|| trl->evt == CEU_IN__ORG_PSED ) {
trl += 2; /* jump [fst|lst] */
}
} while (++trl <= trlF);
#ifdef ceu_out_wclock_set
if (!psed) {
ceu_out_wclock_set(0); /* TODO: recalculate MIN clock */
/* between trl => trlF */
}
#endif
}
#endif
/**********************************************************************/
u8 CEU_GC = 0; /* execute __ceu_gc() when "true" */
void ceu_sys_go (tceu_app* app, int evt, tceu_evtp evtp)
{
switch (evt) {
#ifdef CEU_ASYNCS
case CEU_IN__ASYNC:
app->pendingAsyncs = 0;
break;
#endif
#ifdef CEU_WCLOCKS
case CEU_IN__WCLOCK:
if (app->wclk_min <= evtp.dt)
app->wclk_late = evtp.dt - app->wclk_min;
app->wclk_min_tmp = app->wclk_min;
app->wclk_min = CEU_WCLOCK_INACTIVE;
break;
#endif
}
tceu_go go;
go.evt = evt;
go.evtp = evtp;
go.stki = 0; /* stki */
#ifdef CEU_CLEAR
go.stop = NULL; /* stop */
#endif
app->seqno++;
for (;;) /* STACK */
{
/* TODO: don't restart if kill is impossible (hold trl on stk) */
go.org = app->data; /* on pop(), always restart */
#if defined(CEU_INTS) || defined(CEU_ORGS)
_CEU_GO_CALL_ORG_:
#endif
/* restart from org->trls[0] */
go.trl = &go.org->trls[0];
#if defined(CEU_CLEAR) || defined(CEU_ORGS)
_CEU_GO_CALL_TRL_: /* restart from org->trls[i] */
#endif
#ifdef CEU_DEBUG_TRAILS
#ifdef defined(CEU_ORGS) || defined(CEU_OS)
fprintf(stderr, "GO[%d]: evt=%d stk=%d org=%p [%d/%p]\n", app->seqno,
go.evt, go.stki, go.org, go.org->n, go.org->trls);
#else
fprintf(stderr, "GO[%d]: evt=%d stk=%d [%d]\n", app->seqno,
go.evt, go.stki, CEU_NTRAILS);
#endif
#endif
for (;;) /* TRL // TODO(speed): only range of trails that apply */
{ /* (e.g. events that do not escape an org) */
#ifdef CEU_CLEAR
if (go.trl == go.stop) { /* bounded trail traversal? */
go.stop = NULL; /* back to default */
break; /* pop stack */
}
#endif
/* go.org has been traversed to the end? */
if (go.trl ==
&go.org->trls[
#if defined(CEU_ORGS) || defined(CEU_OS)
go.org->n
#else
CEU_NTRAILS
#endif
])
{
if (go.org == app->data) {
break; /* pop stack */
}
#ifdef CEU_ORGS
{
/* hold next org/trl */
/* TODO(speed): jump LST */
tceu_org* _org = go.org->nxt;
tceu_trl* _trl = &_org->trls [
(go.org->n == 0) ?
((tceu_org_lnk*)go.org)->lnk : 0
];
#ifdef CEU_NEWS
/* org has been cleared to the end? */
if ( go.evt == CEU_IN__CLEAR
&& go.org->isDyn
&& go.org->n != 0 ) /* TODO: avoids LNKs */
{
/* re-link PRV <-> NXT */
go.org->prv->nxt = go.org->nxt;
go.org->nxt->prv = go.org->prv;
/* FREE */
/* TODO: check if needed? (freed manually?) */
/*fprintf(stderr, "FREE: %p\n", go.org);*/
/* TODO(speed): avoid free if pool and blk out of scope */
#if defined(CEU_NEWS_POOL) && !defined(CEU_NEWS_MALLOC)
ceu_pool_free(go.org->pool, (char*)go.org);
#elif defined(CEU_NEWS_POOL) && defined(CEU_NEWS_MALLOC)
if (go.org->pool == NULL)
ceu_sys_free(go.org);
else
ceu_pool_free(go.org->pool, (char*)go.org);
#elif !defined(CEU_NEWS_POOL) && defined(CEU_NEWS_MALLOC)
ceu_sys_free(go.org);
#endif
/* explicit free(me) or end of spawn */
if (go.stop == go.org)
break; /* pop stack */
}
#endif /* CEU_NEWS */
go.org = _org;
go.trl = _trl;
/*fprintf(stderr, "UP[%p] %p %p\n", trl+1, go.org go.trl);*/
goto _CEU_GO_CALL_TRL_;
}
#endif /* CEU_ORGS */
}
/* continue traversing CUR org */
{
#ifdef CEU_DEBUG_TRAILS
#ifdef CEU_ORGS
if (go.trl->evt==CEU_IN__ORG)
fprintf(stderr, "\tTRY [%p] : evt=%d org=%p->%p\n",
go.trl, go.trl->evt,
&go.trl->lnks[0], &go.trl->lnks[1]);
else
#endif
fprintf(stderr, "\tTRY [%p] : evt=%d seqno=%d lbl=%d\n",
go.trl, go.trl->evt, go.trl->seqno, go.trl->lbl);
#endif
/* jump into linked orgs */
#ifdef CEU_ORGS
if ( (go.trl->evt == CEU_IN__ORG)
#ifdef CEU_PSES
|| (go.trl->evt==CEU_IN__ORG_PSED && go.evt==CEU_IN__CLEAR)
#endif
)
{
/* TODO(speed): jump LST */
go.org = go.trl->lnks[0].nxt; /* jump FST */
if (go.evt == CEU_IN__CLEAR) {
go.trl->evt = CEU_IN__NONE;
}
goto _CEU_GO_CALL_ORG_;
}
#endif /* CEU_ORGS */
switch (go.evt)
{
/* "clear" event */
case CEU_IN__CLEAR:
if (go.trl->evt == CEU_IN__CLEAR)
goto _CEU_GO_GO_;
go.trl->evt = CEU_IN__NONE;
goto _CEU_GO_NEXT_;
}
/* a continuation (STK) will always appear before a
* matched event in the same stack level
*/
if ( ! (
(go.trl->evt==CEU_IN__STK && go.trl->stk==go.stki)
||
(go.trl->evt==go.evt && go.trl->seqno!=app->seqno)
/* evt!=CEU_IN__STK (never generated): comp is safe */
/* we use `!=´ intead of `<´ due to u8 overflow */
) ) {
goto _CEU_GO_NEXT_;
}
_CEU_GO_GO_:
/* execute this trail */
go.trl->evt = CEU_IN__NONE;
go.trl->seqno = app->seqno; /* don't awake again */
go.lbl = go.trl->lbl;
}
{
#ifdef CEU_OS
void* __old = CEU_APP_ADDR;
CEU_APP_ADDR = app->addr;
#endif
int _ret = app->code(app, &go);
#ifdef CEU_OS
CEU_APP_ADDR = __old;
#endif
switch (_ret) {
case RET_END:
#if defined(CEU_RET) || defined(CEU_OS)
app->isAlive = 0;
CEU_GC = 1;
#endif
goto _CEU_GO_QUIT_;
/*
case RET_GOTO:
goto _CEU_GOTO_;
*/
#if defined(CEU_CLEAR) || defined(CEU_ORGS)
case RET_TRL:
goto _CEU_GO_CALL_TRL_;
#endif
#if defined(CEU_INTS) || defined(CEU_ORGS)
case RET_ORG:
goto _CEU_GO_CALL_ORG_;
#endif
#ifdef CEU_ASYNCS
case RET_ASYNC:
app->pendingAsyncs = 1;
break;
#endif
default:
break;
}
}
_CEU_GO_NEXT_:
/* go.trl!=CEU_IN__ORG guaranteed here */
if (go.trl->evt!=CEU_IN__STK && go.trl->seqno!=app->seqno)
go.trl->seqno = app->seqno-1; /* keeps the gap tight */
go.trl++;
}
if (go.stki == 0) {
break; /* reaction has terminated */
}
go.evtp = go.stk[--go.stki].evtp;
#ifdef CEU_INTS
#ifdef CEU_ORGS
go.evto = go.stk[ go.stki].evto;
#endif
#endif
go.evt = go.stk[ go.stki].evt;
}
_CEU_GO_QUIT_:;
#ifdef CEU_WCLOCKS
#ifdef ceu_out_wclock_set
if (app->wclk_min != CEU_WCLOCK_INACTIVE)
ceu_out_wclock_set(app->wclk_min); /* only signal after all */
#endif
app->wclk_late = 0;
#endif
}
int ceu_go_all (tceu_app* app)
{
/* All code run atomically:
* - the program is always locked as a whole
* - thread spawns will unlock => re-lock
* - but program will still run to completion
*/
app->init(app); /* calls CEU_THREADS_MUTEX_LOCK() */
#ifdef CEU_IN_OS_START
#if defined(CEU_RET) || defined(CEU_OS)
if (app->isAlive)
#endif
ceu_sys_go(app, CEU_IN_OS_START, (tceu_evtp)NULL);
#endif
#ifdef CEU_ASYNCS
while(
#if defined(CEU_RET) || defined(CEU_OS)
app->isAlive &&
#endif
(
#ifdef CEU_THREADS
app->threads_n>0 ||
#endif
app->pendingAsyncs
) )
{
ceu_sys_go(app, CEU_IN__ASYNC, (tceu_evtp)NULL);
#ifdef CEU_THREADS
CEU_THREADS_MUTEX_UNLOCK(&app->threads_mutex);
/* allow threads to also execute */
CEU_THREADS_MUTEX_LOCK(&app->threads_mutex);
#endif
}
#endif
#ifdef CEU_THREADS
CEU_THREADS_MUTEX_UNLOCK(&app->threads_mutex);
#endif
#ifdef CEU_NEWS
#ifdef CEU_RUNTESTS
assert(_ceu_dyns_ == 0);
#endif
#endif
#ifdef CEU_RET
return app->ret;
#else
return 0;
#endif
}
#ifdef CEU_OS
/* SYS_VECTOR
*/
void* CEU_SYS_VEC[CEU_SYS_MAX] __attribute__((used)) = {
(void*) &ceu_sys_malloc,
(void*) &ceu_sys_free,
(void*) &ceu_sys_load,
(void*) &ceu_sys_start,
(void*) &ceu_sys_link,
(void*) &ceu_sys_unlink,
(void*) &ceu_sys_emit,
(void*) &ceu_sys_call,
(void*) &ceu_sys_go,
(void*) &ceu_sys_org_init,
};
/*****************************************************************************
* QUEUE
* - 256 avoids doing modulo operations
* - n: number of entries
* - 0: next position to consume
* - i: next position to enqueue
*/
#if CEU_QUEUE_MAX == 256
char QUEUE[CEU_QUEUE_MAX];
int QUEUE_tot = 0;
u8 QUEUE_get = 0;
u8 QUEUE_put = 0;
#else
char QUEUE[CEU_QUEUE_MAX];
int QUEUE_tot = 0;
u16 QUEUE_get = 0;
u16 QUEUE_put = 0;
#endif
tceu_queue* ceu_sys_queue_get (void) {
tceu_queue* ret;
ISR_OFF;
if (QUEUE_tot == 0) {
ret = NULL;
} else {
#ifdef CEU_DEBUG
assert(QUEUE_tot > 0);
#endif
ret = (tceu_queue*) &QUEUE[QUEUE_get];
}
ISR_ON;
return ret;
}
int ceu_sys_queue_put (tceu_app* app, tceu_nevt evt, tceu_evtp param,
int sz, char* buf) {
ISR_OFF;
int n = sizeof(tceu_queue) + sz;
if (QUEUE_tot+n > CEU_QUEUE_MAX)
return 0; /* TODO: add event FULL when CEU_QUEUE_MAX-1 */
/* An event+data must be continuous in the QUEUE. */
if (QUEUE_put+n+sizeof(tceu_queue)>=CEU_QUEUE_MAX && evt!=CEU_IN__NONE) {
int fill = CEU_QUEUE_MAX - QUEUE_put - sizeof(tceu_queue);
/*_ceu_sys_emit(app, CEU_IN__NONE, param, fill, NULL);*/
tceu_queue* qu = (tceu_queue*) &QUEUE[QUEUE_put];
qu->app = app;
qu->evt = CEU_IN__NONE;
qu->sz = fill;
QUEUE_put += sizeof(tceu_queue) + fill;
QUEUE_tot += sizeof(tceu_queue) + fill;
}
{
tceu_queue* qu = (tceu_queue*) &QUEUE[QUEUE_put];
qu->app = app;
qu->evt = evt;
qu->sz = sz;
if (sz == 0) {
/* "param" is self-contained */
qu->param = param;
} else {
/* "param" points to "buf" */
qu->param.ptr = qu->buf;
memcpy(qu->buf, buf, sz);
}
}
QUEUE_put += n;
QUEUE_tot += n;
ISR_ON;
return 1;
}
void ceu_sys_queue_rem (void) {
ISR_OFF;
tceu_queue* qu = (tceu_queue*) &QUEUE[QUEUE_get];
QUEUE_tot -= sizeof(tceu_queue) + qu->sz;
QUEUE_get += sizeof(tceu_queue) + qu->sz;
ISR_ON;
}
/*****************************************************************************/
static tceu_app* CEU_APPS = NULL;
static tceu_lnk* CEU_LNKS = NULL;
#ifdef CEU_RET
int ok = 0;
int ret = 0;
#endif
/* TODO: remove this */
int ceu_sys_emit (tceu_app* app, tceu_nevt evt, tceu_evtp param,
int sz, char* buf) {
return ceu_sys_queue_put(app, evt, param, sz, buf);
}
tceu_evtp ceu_sys_call (tceu_app* app, tceu_nevt evt, tceu_evtp param) {
tceu_lnk* lnk = CEU_LNKS;
for (; lnk; lnk=lnk->nxt)
{
if (app!=lnk->src_app || evt!=lnk->src_evt)
continue;
if (! lnk->dst_app->isAlive)
continue; /* TODO: remove when unlink on stop */
#ifdef CEU_OS
void* __old = CEU_APP_ADDR;
CEU_APP_ADDR = lnk->dst_app->addr;
#endif
tceu_evtp ret = lnk->dst_app->calls(lnk->dst_app, lnk->dst_evt, param);
#ifdef CEU_OS
CEU_APP_ADDR = __old;
#endif
return ret;
}
/* TODO: error? */
return (tceu_evtp)NULL;
}
static void _ceu_sys_unlink (tceu_lnk* lnk) {
/* remove as head */
if (CEU_LNKS == lnk) {
CEU_LNKS = lnk->nxt;
/* TODO: prv */
/* remove in the middle */
} else {
tceu_lnk* cur = CEU_LNKS;
while (cur->nxt!=NULL && cur->nxt!=lnk)
cur = cur->nxt;
if (cur->nxt != NULL)
cur->nxt = lnk->nxt;
}
/*lnk->nxt = NULL;*/
ceu_sys_free(lnk);
}
static void __ceu_gc (void)
{
if (! CEU_GC) return;
CEU_GC = 0;
/* remove pending events */
{
ISR_OFF;
int i = 0;
while (i < QUEUE_tot) {
tceu_queue* qu = (tceu_queue*) &QUEUE[QUEUE_get+i];
if (qu->app!=NULL && !qu->app->isAlive) {
qu->evt = CEU_IN__NONE;
}
i += sizeof(tceu_queue) + qu->sz;
}
ISR_ON;
}
/* remove broken links */
{
tceu_lnk* cur = CEU_LNKS;
while (cur != NULL) {
tceu_lnk* nxt = cur->nxt;
if (!cur->src_app->isAlive || !cur->dst_app->isAlive)
_ceu_sys_unlink(cur);
cur = nxt;
}
}
/* remove dead apps */
tceu_app* app = CEU_APPS;
tceu_app* prv = NULL;
while (app)
{
tceu_app* nxt = app->nxt;
if (app->isAlive) {
prv = app;
} else {
if (CEU_APPS == app) {
CEU_APPS = nxt; /* remove as head */
} else {
prv->nxt = nxt; /* remove in the middle */
}
/* unlink all "from app" or "to app" */
ceu_sys_unlink(app,0, 0,0);
ceu_sys_unlink(0,0, app,0);
#ifdef CEU_RET
ok--;
ret += app->ret;
#endif
/* free app memory */
ceu_sys_free(app->data);
ceu_sys_free(app);
}
app = nxt;
}
}
int ceu_scheduler (int(*dt)())
{
__ceu_gc(); /* apps already terminated from MAIN() */
#ifdef CEU_RET
while (ok > 0)
#else
while (1)
#endif
{
/* DT */
int _dt = dt();
ceu_sys_emit(NULL, CEU_IN_OS_DT, (tceu_evtp)_dt, 0, NULL);
/* WCLOCK */
#ifdef CEU_WCLOCKS
{
tceu_app* app = CEU_APPS;
while (app) {
ceu_sys_go(app, CEU_IN__WCLOCK, (tceu_evtp)_dt);
app = app->nxt;
}
__ceu_gc();
}
#endif /* CEU_WCLOCKS */
/* ASYNC */
#ifdef CEU_ASYNCS
{
tceu_app* app = CEU_APPS;
while (app) {
ceu_sys_go(app, CEU_IN__ASYNC, (tceu_evtp)NULL);
app = app->nxt;
}
__ceu_gc();
}
#endif /* CEU_ASYNCS */
/* EVENTS */
{
/* clear the current size (ignore events emitted here) */
ISR_OFF;
int tot = QUEUE_tot;
ISR_ON;
while (tot > 0)
{
tceu_queue* qu = ceu_sys_queue_get();
tot -= sizeof(tceu_queue) + qu->sz;
if (qu->evt == CEU_IN__NONE) {
/* nothing; */
/* "fill event" */
/* global events (e.g. OS_START, OS_INTERRUPT) */
} else if (qu->app == NULL) {
tceu_app* app = CEU_APPS;
while (app) {
ceu_sys_go(app, qu->evt, qu->param);
app = app->nxt;
}
} else {
/* linked events */
tceu_lnk* lnk = CEU_LNKS;
while (lnk) {
if ( qu->app==lnk->src_app
&& qu->evt==lnk->src_evt
&& lnk->dst_app->isAlive ) {
ceu_sys_go(lnk->dst_app, lnk->dst_evt, qu->param);
}
lnk = lnk->nxt;
}
}
ceu_sys_queue_rem();
}
__ceu_gc();
}
}
#ifdef CEU_RET
return ret;
#else
return 0;
#endif
}
/* LOAD / START */
tceu_app* ceu_sys_load (void* addr)
{
uint size;
tceu_init* init;
#ifdef __AVR
((tceu_export) ((word)addr>>1))(&size, &init);
#else
((tceu_export) addr)(&size, &init);
#endif
tceu_app* app = (tceu_app*) ceu_sys_malloc(sizeof(tceu_app));
if (app == NULL)
return NULL;
app->data = (tceu_org*) ceu_sys_malloc(size);
if (app->data == NULL)
return NULL;
app->sys_vec = CEU_SYS_VEC;
app->nxt = NULL;
/* Assumes sizeof(void*)==sizeof(WORD) and
that gcc will word-align SIZE/INIT */
#ifdef __AVR
app->init = (tceu_init) (((word)addr>>1) + (word)init);
#else
app->init = (tceu_init) ((word)init);
#endif
app->addr = addr;
return app;
}
void ceu_sys_start (tceu_app* app)
{
/* add as head */
if (CEU_APPS == NULL) {
CEU_APPS = app;
/* add to tail */
} else {
tceu_app* cur = CEU_APPS;
while (cur->nxt != NULL)
cur = cur->nxt;
cur->nxt = app;
}
/* MAX OK */
#ifdef CEU_RET
ok++;
#endif
/* INIT */
/*
printf(">>> %p %X %p[%x %x %x %x %x]\n", addr, size, init,
((unsigned char*)init)[5],
((unsigned char*)init)[6],
((unsigned char*)init)[7],
((unsigned char*)init)[8],
((unsigned char*)init)[9]);
printf("<<< %d %d\n", app->isAlive, app->ret);
*/
app->init(app);
/* OS_START */
#ifdef CEU_IN_OS_START
ceu_sys_emit(NULL, CEU_IN_OS_START, (tceu_evtp)NULL, 0, NULL);
#endif
}
/* LINK & UNLINK */
int ceu_sys_link (tceu_app* src_app, tceu_nevt src_evt,
tceu_app* dst_app, tceu_nevt dst_evt)
{
tceu_lnk* lnk = (tceu_lnk*) ceu_sys_malloc(sizeof(tceu_lnk));
if (lnk == NULL)
return 0;
lnk->src_app = src_app;
lnk->src_evt = src_evt;
lnk->dst_app = dst_app;
lnk->dst_evt = dst_evt;
lnk->nxt = NULL;
/* add as head */
if (CEU_LNKS == NULL) {
CEU_LNKS = lnk;
/* add to tail */
} else {
tceu_lnk* cur = CEU_LNKS;
while (cur->nxt != NULL)
cur = cur->nxt;
cur->nxt = lnk;
}
return 1;
}
int ceu_sys_unlink (tceu_app* src_app, tceu_nevt src_evt,
tceu_app* dst_app, tceu_nevt dst_evt)
{
tceu_lnk* cur = CEU_LNKS;
while (cur != NULL) {
tceu_lnk* nxt = cur->nxt;
if ( (src_app==0 || src_app==cur->src_app)
&& (src_evt==0 || src_evt==cur->src_evt)
&& (dst_app==0 || dst_app==cur->dst_app)
&& (dst_evt==0 || dst_evt==cur->dst_evt) ) {
_ceu_sys_unlink(cur);
}
cur = nxt;
}
return 0;
}
#if 0
/* Foreach ISR, call _ceu_sys_emit directly because interrupts are already
* disabled. */
#ifdef UART0_UDRE_vect
ISR(UART0_UDRE_vect, ISR_BLOCK) {
_ceu_sys_emit(NULL,CEU_IN_OS_INTERRUPT,(tceu_evtp)UART0_UDRE_vect,0,NULL);
}
#endif
#ifdef UART_UDRE_vect
ISR(UART_UDRE_vect, ISR_BLOCK) {
_ceu_sys_emit(NULL,CEU_IN_OS_INTERRUPT,(tceu_evtp)UART_UDRE_vect,0,NULL);
}
#endif
#ifdef USART0_UDRE_vect
ISR(USART0_UDRE_vect, ISR_BLOCK) {
_ceu_sys_emit(NULL,CEU_IN_OS_INTERRUPT,(tceu_evtp)USART0_UDRE_vect,0,NULL);
}
#endif
#ifdef USART1_UDRE_vect
ISR(USART1_UDRE_vect, ISR_BLOCK) {
_ceu_sys_emit(NULL,CEU_IN_OS_INTERRUPT,(tceu_evtp)USART1_UDRE_vect,0,NULL);
}
#endif
#ifdef USART_UDRE_vect
ISR(USART_UDRE_vect, ISR_BLOCK) {
_ceu_sys_emit(NULL,CEU_IN_OS_INTERRUPT,(tceu_evtp)USART_UDRE_vect,0,NULL);
}
#endif
#ifdef USART2_UDRE_vect
ISR(USART2_UDRE_vect, ISR_BLOCK) {
_ceu_sys_emit(NULL,CEU_IN_OS_INTERRUPT,(tceu_evtp)USART2_UDRE_vect,0,NULL);
}
#endif
#ifdef USART3_UDRE_vect
ISR(USART3_UDRE_vect, ISR_BLOCK) {
_ceu_sys_emit(NULL,CEU_IN_OS_INTERRUPT,(tceu_evtp)USART3_UDRE_vect,0,NULL);
}
#endif
#endif /* 0 */
#endif /* CEU_OS */