Ejemplo n.º 1
0
int64
runtime·tickspersecond(void)
{
	int64 res, t0, t1, c0, c1;

	res = (int64)runtime·atomicload64((uint64*)&ticks);
	if(res != 0)
		return ticks;
	runtime·lock(&ticksLock);
	res = ticks;
	if(res == 0) {
		t0 = runtime·nanotime();
		c0 = runtime·cputicks();
		runtime·usleep(100*1000);
		t1 = runtime·nanotime();
		c1 = runtime·cputicks();
		if(t1 == t0)
			t1++;
		res = (c1-c0)*1000*1000*1000/(t1-t0);
		if(res == 0)
			res++;
		runtime·atomicstore64((uint64*)&ticks, res);
	}
	runtime·unlock(&ticksLock);
	return res;
}
Ejemplo n.º 2
0
static void 
closechan ( Hchan *c , void *pc ) 
{ 
SudoG *sg; 
G* gp; 
#line 1041 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( c == nil ) 
runtime·panicstring ( "close of nil channel" ) ; 
#line 1044 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
runtime·lock ( c ) ; 
if ( c->closed ) { 
runtime·unlock ( c ) ; 
runtime·panicstring ( "close of closed channel" ) ; 
} 
#line 1050 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( raceenabled ) { 
runtime·racewritepc ( c , pc , runtime·closechan ) ; 
runtime·racerelease ( c ) ; 
} 
#line 1055 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
c->closed = true; 
#line 1058 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
for ( ;; ) { 
sg = dequeue ( &c->recvq ) ; 
if ( sg == nil ) 
break; 
gp = sg->g; 
gp->param = nil; 
if ( sg->releasetime ) 
sg->releasetime = runtime·cputicks ( ) ; 
runtime·ready ( gp ) ; 
} 
#line 1070 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
for ( ;; ) { 
sg = dequeue ( &c->sendq ) ; 
if ( sg == nil ) 
break; 
gp = sg->g; 
gp->param = nil; 
if ( sg->releasetime ) 
sg->releasetime = runtime·cputicks ( ) ; 
runtime·ready ( gp ) ; 
} 
#line 1081 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
runtime·unlock ( c ) ; 
} 
Ejemplo n.º 3
0
static void 
closechan ( Hchan *c , void *pc ) 
{ 
SudoG *sg; 
G* gp; 
#line 1045 "/home/14/ren/source/golang/go/src/pkg/runtime/chan.goc"
if ( c == nil ) 
runtime·panicstring ( "close of nil channel" ) ; 
#line 1048 "/home/14/ren/source/golang/go/src/pkg/runtime/chan.goc"
runtime·lock ( c ) ; 
if ( c->closed ) { 
runtime·unlock ( c ) ; 
runtime·panicstring ( "close of closed channel" ) ; 
} 
#line 1054 "/home/14/ren/source/golang/go/src/pkg/runtime/chan.goc"
if ( raceenabled ) { 
runtime·racewritepc ( c , pc , runtime·closechan ) ; 
runtime·racerelease ( c ) ; 
} 
#line 1059 "/home/14/ren/source/golang/go/src/pkg/runtime/chan.goc"
c->closed = true; 
#line 1062 "/home/14/ren/source/golang/go/src/pkg/runtime/chan.goc"
for ( ;; ) { 
sg = dequeue ( &c->recvq ) ; 
if ( sg == nil ) 
break; 
gp = sg->g; 
gp->param = nil; 
if ( sg->releasetime ) 
sg->releasetime = runtime·cputicks ( ) ; 
runtime·ready ( gp ) ; 
} 
#line 1074 "/home/14/ren/source/golang/go/src/pkg/runtime/chan.goc"
for ( ;; ) { 
sg = dequeue ( &c->sendq ) ; 
if ( sg == nil ) 
break; 
gp = sg->g; 
gp->param = nil; 
if ( sg->releasetime ) 
sg->releasetime = runtime·cputicks ( ) ; 
runtime·ready ( gp ) ; 
} 
#line 1085 "/home/14/ren/source/golang/go/src/pkg/runtime/chan.goc"
runtime·unlock ( c ) ; 
} 
Ejemplo n.º 4
0
Archivo: cascade.c Proyecto: taysom/tau
int main (int argc, char *argvp[])
{
	tick_t	i;
	tick_t	start;
	tick_t	delta;

//	printf("%lld\n", cputicks());
//	printf("%lld\n", cputicks());

	start = cputicks();
	for (i = 0; i < 400017LL; i++) {
		delta = cputicks() - start;
		start = cputicks();
		cascade(delta);
	}
	pr_cascade();
	return 0;
}
Ejemplo n.º 5
0
static void
mcommoninit(M *mp)
{
    mp->id = runtime·sched.mcount++;
    mp->fastrand = 0x49f6428aUL + mp->id + runtime·cputicks();

    if(mp->mcache == nil)
        mp->mcache = runtime·allocmcache();

    runtime·callers(1, mp->createstack, nelem(mp->createstack));

    // Add to runtime·allm so garbage collector doesn't free m
    // when it is just in a register or thread-local storage.
    mp->alllink = runtime·allm;
    // runtime·NumCgoCall() iterates over allm w/o schedlock,
    // so we need to publish it safely.
    runtime·atomicstorep(&runtime·allm, mp);
}
Ejemplo n.º 6
0
static void
mcommoninit(M *m)
{
	m->id = runtime·sched.mcount++;
	m->fastrand = 0x49f6428aUL + m->id + runtime·cputicks();
	m->stackalloc = runtime·malloc(sizeof(*m->stackalloc));
	runtime·FixAlloc_Init(m->stackalloc, FixedStack, runtime·SysAlloc, nil, nil);

	if(m->mcache == nil)
		m->mcache = runtime·allocmcache();

	runtime·callers(1, m->createstack, nelem(m->createstack));

	// Add to runtime·allm so garbage collector doesn't free m
	// when it is just in a register or thread-local storage.
	m->alllink = runtime·allm;
	// runtime·NumCgoCall() iterates over allm w/o schedlock,
	// so we need to publish it safely.
	runtime·atomicstorep(&runtime·allm, m);
}
Ejemplo n.º 7
0
static void print_procs(int maxlines,
	struct proc *proc1, struct proc *proc2, int cputimemode)
{
	int p, nprocs;
	u64_t idleticks = 0;
	u64_t kernelticks = 0;
	u64_t systemticks = 0;
	u64_t userticks = 0;
	u64_t total_ticks = 0;
	int blockedseen = 0;
	static struct tp *tick_procs = NULL;

	if (tick_procs == NULL) {
		tick_procs = malloc(nr_total * sizeof(tick_procs[0]));

		if (tick_procs == NULL) {
			fprintf(stderr, "Out of memory!\n");
			exit(1);
		}
	}

	for(p = nprocs = 0; p < nr_total; p++) {
		u64_t uticks;
		if(!(proc2[p].p_flags & USED))
			continue;
		tick_procs[nprocs].p = proc2 + p;
		tick_procs[nprocs].ticks = cputicks(&proc1[p], &proc2[p], cputimemode);
		uticks = cputicks(&proc1[p], &proc2[p], 1);
		total_ticks = total_ticks + uticks;
		if(p-NR_TASKS == IDLE) {
			idleticks = uticks;
			continue;
		}
		if(p-NR_TASKS == KERNEL) {
			kernelticks = uticks;
		}
		if(!(proc2[p].p_flags & IS_TASK)) {
			if(proc2[p].p_flags & IS_SYSTEM)
				systemticks = systemticks + tick_procs[nprocs].ticks;
			else
				userticks = userticks + tick_procs[nprocs].ticks;
		}

		nprocs++;
	}

	if (total_ticks == 0)
		return;

	qsort(tick_procs, nprocs, sizeof(tick_procs[0]), cmp_procs);

	printf("CPU states: %6.2f%% user, ", 100.0 * userticks / total_ticks);
	printf("%6.2f%% system, ", 100.0 * systemticks / total_ticks);
	printf("%6.2f%% kernel, ", 100.0 * kernelticks/ total_ticks);
	printf("%6.2f%% idle", 100.0 * idleticks / total_ticks);

#define NEWLINE do { printf("\n"); if(--maxlines <= 0) { return; } } while(0)
	NEWLINE;

	printf("CPU time displayed ('%c' to cycle): %s; ",
		TIMECYCLEKEY, cputimemodename(cputimemode));
	printf(" sort order ('%c' to cycle): %s", ORDERKEY, ordername(order));
	NEWLINE;

	NEWLINE;

	printf("  PID USERNAME PRI NICE    SIZE STATE   TIME     CPU COMMAND");
	NEWLINE;
	for(p = 0; p < nprocs; p++) {
		struct proc *pr;
		int level = 0;

		pr = tick_procs[p].p;

		if((pr->p_flags & IS_TASK) && pr->p_pid != KERNEL) {
			/* skip old kernel tasks as they don't run anymore */
			continue;
		}

		/* If we're in blocked verbose mode, indicate start of
		 * blocked processes.
		 */
		if(blockedverbose && (pr->p_flags & BLOCKED) && !blockedseen) {
			NEWLINE;
			printf("Blocked processes:");
			NEWLINE;
			blockedseen = 1;
		}

		print_proc(&tick_procs[p], total_ticks);
		NEWLINE;

		if(!blockedverbose)
			continue;

		/* Traverse dependency chain if blocked. */
		while(pr->p_flags & BLOCKED) {
			endpoint_t dep = NONE;
			struct tp *tpdep;
			level += 5;

			if((dep = pr->p_blocked) == NONE) {
				printf("not blocked on a process");
				NEWLINE;
				break;
			}

			if(dep == ANY)
				break;

			tpdep = lookup(dep, tick_procs, nprocs);
			pr = tpdep->p;
			printf("%*s> ", level, "");
			print_proc(tpdep, total_ticks);
			NEWLINE;
		}
	}
}
Ejemplo n.º 8
0
static bool 
chansend ( ChanType *t , Hchan *c , byte *ep , bool block , void *pc ) 
{ 
SudoG *sg; 
SudoG mysg; 
G* gp; 
int64 t0; 
#line 82 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( raceenabled ) 
runtime·racereadobjectpc ( ep , t->elem , runtime·getcallerpc ( &t ) , chansend ) ; 
#line 85 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( c == nil ) { 
USED ( t ) ; 
if ( !block ) 
return false; 
runtime·park ( nil , nil , "chan send (nil chan)" ) ; 
return false; 
} 
#line 93 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( debug ) { 
runtime·printf ( "chansend: chan=%p; elem=" , c ) ; 
c->elemtype->alg->print ( c->elemsize , ep ) ; 
runtime·prints ( "\n" ) ; 
} 
#line 99 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
t0 = 0; 
mysg.releasetime = 0; 
if ( runtime·blockprofilerate > 0 ) { 
t0 = runtime·cputicks ( ) ; 
mysg.releasetime = -1; 
} 
#line 106 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
runtime·lock ( c ) ; 
if ( raceenabled ) 
runtime·racereadpc ( c , pc , chansend ) ; 
if ( c->closed ) 
goto closed; 
#line 112 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( c->dataqsiz > 0 ) 
goto asynch; 
#line 115 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
sg = dequeue ( &c->recvq ) ; 
if ( sg != nil ) { 
if ( raceenabled ) 
racesync ( c , sg ) ; 
runtime·unlock ( c ) ; 
#line 121 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
gp = sg->g; 
gp->param = sg; 
if ( sg->elem != nil ) 
c->elemtype->alg->copy ( c->elemsize , sg->elem , ep ) ; 
if ( sg->releasetime ) 
sg->releasetime = runtime·cputicks ( ) ; 
runtime·ready ( gp ) ; 
return true; 
} 
#line 131 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( !block ) { 
runtime·unlock ( c ) ; 
return false; 
} 
#line 136 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
mysg.elem = ep; 
mysg.g = g; 
mysg.selectdone = nil; 
g->param = nil; 
enqueue ( &c->sendq , &mysg ) ; 
runtime·parkunlock ( c , "chan send" ) ; 
#line 143 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( g->param == nil ) { 
runtime·lock ( c ) ; 
if ( !c->closed ) 
runtime·throw ( "chansend: spurious wakeup" ) ; 
goto closed; 
} 
#line 150 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( mysg.releasetime > 0 ) 
runtime·blockevent ( mysg.releasetime - t0 , 2 ) ; 
#line 153 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
return true; 
#line 155 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
asynch: 
if ( c->closed ) 
goto closed; 
#line 159 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( c->qcount >= c->dataqsiz ) { 
if ( !block ) { 
runtime·unlock ( c ) ; 
return false; 
} 
mysg.g = g; 
mysg.elem = nil; 
mysg.selectdone = nil; 
enqueue ( &c->sendq , &mysg ) ; 
runtime·parkunlock ( c , "chan send" ) ; 
#line 170 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
runtime·lock ( c ) ; 
goto asynch; 
} 
#line 174 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( raceenabled ) { 
runtime·raceacquire ( chanbuf ( c , c->sendx ) ) ; 
runtime·racerelease ( chanbuf ( c , c->sendx ) ) ; 
} 
#line 179 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
c->elemtype->alg->copy ( c->elemsize , chanbuf ( c , c->sendx ) , ep ) ; 
if ( ++c->sendx == c->dataqsiz ) 
c->sendx = 0; 
c->qcount++; 
#line 184 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
sg = dequeue ( &c->recvq ) ; 
if ( sg != nil ) { 
gp = sg->g; 
runtime·unlock ( c ) ; 
if ( sg->releasetime ) 
sg->releasetime = runtime·cputicks ( ) ; 
runtime·ready ( gp ) ; 
} else 
runtime·unlock ( c ) ; 
if ( mysg.releasetime > 0 ) 
runtime·blockevent ( mysg.releasetime - t0 , 2 ) ; 
return true; 
#line 197 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
closed: 
runtime·unlock ( c ) ; 
runtime·panicstring ( "send on closed channel" ) ; 
return false; 
} 
Ejemplo n.º 9
0
static void* 
selectgo ( Select **selp ) 
{ 
Select *sel; 
uint32 o , i , j , k , done; 
int64 t0; 
Scase *cas , *dfl; 
Hchan *c; 
SudoG *sg; 
G *gp; 
byte *as; 
void *pc; 
#line 663 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
sel = *selp; 
#line 665 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( debug ) 
runtime·printf ( "select: sel=%p\n" , sel ) ; 
#line 668 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
t0 = 0; 
if ( runtime·blockprofilerate > 0 ) { 
t0 = runtime·cputicks ( ) ; 
for ( i=0; i<sel->ncase; i++ ) 
sel->scase[i].sg.releasetime = -1; 
} 
#line 684 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
for ( i=0; i<sel->ncase; i++ ) 
sel->pollorder[i] = i; 
for ( i=1; i<sel->ncase; i++ ) { 
o = sel->pollorder[i]; 
j = runtime·fastrand1 ( ) % ( i+1 ) ; 
sel->pollorder[i] = sel->pollorder[j]; 
sel->pollorder[j] = o; 
} 
#line 695 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
for ( i=0; i<sel->ncase; i++ ) { 
j = i; 
c = sel->scase[j].chan; 
while ( j > 0 && sel->lockorder[k= ( j-1 ) /2] < c ) { 
sel->lockorder[j] = sel->lockorder[k]; 
j = k; 
} 
sel->lockorder[j] = c; 
} 
for ( i=sel->ncase; i-->0; ) { 
c = sel->lockorder[i]; 
sel->lockorder[i] = sel->lockorder[0]; 
j = 0; 
for ( ;; ) { 
k = j*2+1; 
if ( k >= i ) 
break; 
if ( k+1 < i && sel->lockorder[k] < sel->lockorder[k+1] ) 
k++; 
if ( c < sel->lockorder[k] ) { 
sel->lockorder[j] = sel->lockorder[k]; 
j = k; 
continue; 
} 
break; 
} 
sel->lockorder[j] = c; 
} 
#line 730 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
sellock ( sel ) ; 
#line 732 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
loop: 
#line 734 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
dfl = nil; 
for ( i=0; i<sel->ncase; i++ ) { 
o = sel->pollorder[i]; 
cas = &sel->scase[o]; 
c = cas->chan; 
#line 740 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
switch ( cas->kind ) { 
case CaseRecv: 
if ( c->dataqsiz > 0 ) { 
if ( c->qcount > 0 ) 
goto asyncrecv; 
} else { 
sg = dequeue ( &c->sendq ) ; 
if ( sg != nil ) 
goto syncrecv; 
} 
if ( c->closed ) 
goto rclose; 
break; 
#line 754 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
case CaseSend: 
if ( raceenabled ) 
runtime·racereadpc ( c , cas->pc , chansend ) ; 
if ( c->closed ) 
goto sclose; 
if ( c->dataqsiz > 0 ) { 
if ( c->qcount < c->dataqsiz ) 
goto asyncsend; 
} else { 
sg = dequeue ( &c->recvq ) ; 
if ( sg != nil ) 
goto syncsend; 
} 
break; 
#line 769 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
case CaseDefault: 
dfl = cas; 
break; 
} 
} 
#line 775 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( dfl != nil ) { 
selunlock ( sel ) ; 
cas = dfl; 
goto retc; 
} 
#line 783 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
done = 0; 
for ( i=0; i<sel->ncase; i++ ) { 
o = sel->pollorder[i]; 
cas = &sel->scase[o]; 
c = cas->chan; 
sg = &cas->sg; 
sg->g = g; 
sg->selectdone = &done; 
#line 792 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
switch ( cas->kind ) { 
case CaseRecv: 
enqueue ( &c->recvq , sg ) ; 
break; 
#line 797 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
case CaseSend: 
enqueue ( &c->sendq , sg ) ; 
break; 
} 
} 
#line 803 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
g->param = nil; 
runtime·park ( selparkcommit , sel , "select" ) ; 
#line 806 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
sellock ( sel ) ; 
sg = g->param; 
#line 811 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
for ( i=0; i<sel->ncase; i++ ) { 
cas = &sel->scase[i]; 
if ( cas != ( Scase* ) sg ) { 
c = cas->chan; 
if ( cas->kind == CaseSend ) 
dequeueg ( &c->sendq ) ; 
else 
dequeueg ( &c->recvq ) ; 
} 
} 
#line 822 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( sg == nil ) 
goto loop; 
#line 825 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
cas = ( Scase* ) sg; 
c = cas->chan; 
#line 828 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( c->dataqsiz > 0 ) 
runtime·throw ( "selectgo: shouldn't happen" ) ; 
#line 831 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( debug ) 
runtime·printf ( "wait-return: sel=%p c=%p cas=%p kind=%d\n" , 
sel , c , cas , cas->kind ) ; 
#line 835 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( cas->kind == CaseRecv ) { 
if ( cas->receivedp != nil ) 
*cas->receivedp = true; 
} 
#line 840 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( raceenabled ) { 
if ( cas->kind == CaseRecv && cas->sg.elem != nil ) 
runtime·racewriteobjectpc ( cas->sg.elem , c->elemtype , cas->pc , chanrecv ) ; 
else if ( cas->kind == CaseSend ) 
runtime·racereadobjectpc ( cas->sg.elem , c->elemtype , cas->pc , chansend ) ; 
} 
#line 847 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
selunlock ( sel ) ; 
goto retc; 
#line 850 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
asyncrecv: 
#line 852 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( raceenabled ) { 
if ( cas->sg.elem != nil ) 
runtime·racewriteobjectpc ( cas->sg.elem , c->elemtype , cas->pc , chanrecv ) ; 
runtime·raceacquire ( chanbuf ( c , c->recvx ) ) ; 
runtime·racerelease ( chanbuf ( c , c->recvx ) ) ; 
} 
if ( cas->receivedp != nil ) 
*cas->receivedp = true; 
if ( cas->sg.elem != nil ) 
c->elemtype->alg->copy ( c->elemsize , cas->sg.elem , chanbuf ( c , c->recvx ) ) ; 
c->elemtype->alg->copy ( c->elemsize , chanbuf ( c , c->recvx ) , nil ) ; 
if ( ++c->recvx == c->dataqsiz ) 
c->recvx = 0; 
c->qcount--; 
sg = dequeue ( &c->sendq ) ; 
if ( sg != nil ) { 
gp = sg->g; 
selunlock ( sel ) ; 
if ( sg->releasetime ) 
sg->releasetime = runtime·cputicks ( ) ; 
runtime·ready ( gp ) ; 
} else { 
selunlock ( sel ) ; 
} 
goto retc; 
#line 878 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
asyncsend: 
#line 880 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( raceenabled ) { 
runtime·raceacquire ( chanbuf ( c , c->sendx ) ) ; 
runtime·racerelease ( chanbuf ( c , c->sendx ) ) ; 
runtime·racereadobjectpc ( cas->sg.elem , c->elemtype , cas->pc , chansend ) ; 
} 
c->elemtype->alg->copy ( c->elemsize , chanbuf ( c , c->sendx ) , cas->sg.elem ) ; 
if ( ++c->sendx == c->dataqsiz ) 
c->sendx = 0; 
c->qcount++; 
sg = dequeue ( &c->recvq ) ; 
if ( sg != nil ) { 
gp = sg->g; 
selunlock ( sel ) ; 
if ( sg->releasetime ) 
sg->releasetime = runtime·cputicks ( ) ; 
runtime·ready ( gp ) ; 
} else { 
selunlock ( sel ) ; 
} 
goto retc; 
#line 901 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
syncrecv: 
#line 903 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( raceenabled ) { 
if ( cas->sg.elem != nil ) 
runtime·racewriteobjectpc ( cas->sg.elem , c->elemtype , cas->pc , chanrecv ) ; 
racesync ( c , sg ) ; 
} 
selunlock ( sel ) ; 
if ( debug ) 
runtime·printf ( "syncrecv: sel=%p c=%p o=%d\n" , sel , c , o ) ; 
if ( cas->receivedp != nil ) 
*cas->receivedp = true; 
if ( cas->sg.elem != nil ) 
c->elemtype->alg->copy ( c->elemsize , cas->sg.elem , sg->elem ) ; 
gp = sg->g; 
gp->param = sg; 
if ( sg->releasetime ) 
sg->releasetime = runtime·cputicks ( ) ; 
runtime·ready ( gp ) ; 
goto retc; 
#line 922 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
rclose: 
#line 924 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
selunlock ( sel ) ; 
if ( cas->receivedp != nil ) 
*cas->receivedp = false; 
if ( cas->sg.elem != nil ) 
c->elemtype->alg->copy ( c->elemsize , cas->sg.elem , nil ) ; 
if ( raceenabled ) 
runtime·raceacquire ( c ) ; 
goto retc; 
#line 933 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
syncsend: 
#line 935 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( raceenabled ) { 
runtime·racereadobjectpc ( cas->sg.elem , c->elemtype , cas->pc , chansend ) ; 
racesync ( c , sg ) ; 
} 
selunlock ( sel ) ; 
if ( debug ) 
runtime·printf ( "syncsend: sel=%p c=%p o=%d\n" , sel , c , o ) ; 
if ( sg->elem != nil ) 
c->elemtype->alg->copy ( c->elemsize , sg->elem , cas->sg.elem ) ; 
gp = sg->g; 
gp->param = sg; 
if ( sg->releasetime ) 
sg->releasetime = runtime·cputicks ( ) ; 
runtime·ready ( gp ) ; 
#line 950 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
retc: 
#line 956 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
pc = cas->pc; 
if ( cas->so > 0 ) { 
as = ( byte* ) selp + cas->so; 
*as = true; 
} 
if ( cas->sg.releasetime > 0 ) 
runtime·blockevent ( cas->sg.releasetime - t0 , 2 ) ; 
runtime·free ( sel ) ; 
return pc; 
#line 966 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
sclose: 
#line 968 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
selunlock ( sel ) ; 
runtime·panicstring ( "send on closed channel" ) ; 
return nil; 
} 
Ejemplo n.º 10
0
static bool 
chanrecv ( ChanType *t , Hchan* c , byte *ep , bool block , bool *received ) 
{ 
SudoG *sg; 
SudoG mysg; 
G *gp; 
int64 t0; 
#line 214 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( debug ) 
runtime·printf ( "chanrecv: chan=%p\n" , c ) ; 
#line 217 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( c == nil ) { 
USED ( t ) ; 
if ( !block ) 
return false; 
runtime·park ( nil , nil , "chan receive (nil chan)" ) ; 
return false; 
} 
#line 225 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
t0 = 0; 
mysg.releasetime = 0; 
if ( runtime·blockprofilerate > 0 ) { 
t0 = runtime·cputicks ( ) ; 
mysg.releasetime = -1; 
} 
#line 232 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
runtime·lock ( c ) ; 
if ( c->dataqsiz > 0 ) 
goto asynch; 
#line 236 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( c->closed ) 
goto closed; 
#line 239 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
sg = dequeue ( &c->sendq ) ; 
if ( sg != nil ) { 
if ( raceenabled ) 
racesync ( c , sg ) ; 
runtime·unlock ( c ) ; 
#line 245 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( ep != nil ) 
c->elemtype->alg->copy ( c->elemsize , ep , sg->elem ) ; 
gp = sg->g; 
gp->param = sg; 
if ( sg->releasetime ) 
sg->releasetime = runtime·cputicks ( ) ; 
runtime·ready ( gp ) ; 
#line 253 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( received != nil ) 
*received = true; 
return true; 
} 
#line 258 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( !block ) { 
runtime·unlock ( c ) ; 
return false; 
} 
#line 263 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
mysg.elem = ep; 
mysg.g = g; 
mysg.selectdone = nil; 
g->param = nil; 
enqueue ( &c->recvq , &mysg ) ; 
runtime·parkunlock ( c , "chan receive" ) ; 
#line 270 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( g->param == nil ) { 
runtime·lock ( c ) ; 
if ( !c->closed ) 
runtime·throw ( "chanrecv: spurious wakeup" ) ; 
goto closed; 
} 
#line 277 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( received != nil ) 
*received = true; 
if ( mysg.releasetime > 0 ) 
runtime·blockevent ( mysg.releasetime - t0 , 2 ) ; 
return true; 
#line 283 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
asynch: 
if ( c->qcount <= 0 ) { 
if ( c->closed ) 
goto closed; 
#line 288 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( !block ) { 
runtime·unlock ( c ) ; 
if ( received != nil ) 
*received = false; 
return false; 
} 
mysg.g = g; 
mysg.elem = nil; 
mysg.selectdone = nil; 
enqueue ( &c->recvq , &mysg ) ; 
runtime·parkunlock ( c , "chan receive" ) ; 
#line 300 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
runtime·lock ( c ) ; 
goto asynch; 
} 
#line 304 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( raceenabled ) { 
runtime·raceacquire ( chanbuf ( c , c->recvx ) ) ; 
runtime·racerelease ( chanbuf ( c , c->recvx ) ) ; 
} 
#line 309 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( ep != nil ) 
c->elemtype->alg->copy ( c->elemsize , ep , chanbuf ( c , c->recvx ) ) ; 
c->elemtype->alg->copy ( c->elemsize , chanbuf ( c , c->recvx ) , nil ) ; 
if ( ++c->recvx == c->dataqsiz ) 
c->recvx = 0; 
c->qcount--; 
#line 316 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
sg = dequeue ( &c->sendq ) ; 
if ( sg != nil ) { 
gp = sg->g; 
runtime·unlock ( c ) ; 
if ( sg->releasetime ) 
sg->releasetime = runtime·cputicks ( ) ; 
runtime·ready ( gp ) ; 
} else 
runtime·unlock ( c ) ; 
#line 326 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
if ( received != nil ) 
*received = true; 
if ( mysg.releasetime > 0 ) 
runtime·blockevent ( mysg.releasetime - t0 , 2 ) ; 
return true; 
#line 332 "/tmp/makerelease402042453/go/src/pkg/runtime/chan.goc"
closed: 
if ( ep != nil ) 
c->elemtype->alg->copy ( c->elemsize , ep , nil ) ; 
if ( received != nil ) 
*received = false; 
if ( raceenabled ) 
runtime·raceacquire ( c ) ; 
runtime·unlock ( c ) ; 
if ( mysg.releasetime > 0 ) 
runtime·blockevent ( mysg.releasetime - t0 , 2 ) ; 
return true; 
} 
Ejemplo n.º 11
0
void
runtime·chanrecv(ChanType *t, Hchan* c, byte *ep, bool *selected, bool *received)
{
	SudoG *sg;
	SudoG mysg;
	G *gp;
	int64 t0;

	if(runtime·gcwaiting)
		runtime·gosched();

	if(debug)
		runtime·printf("chanrecv: chan=%p\n", c);

	if(c == nil) {
		USED(t);
		if(selected != nil) {
			*selected = false;
			return;
		}
		runtime·park(nil, nil, "chan receive (nil chan)");
		return;  // not reached
	}

	t0 = 0;
	mysg.releasetime = 0;
	if(runtime·blockprofilerate > 0) {
		t0 = runtime·cputicks();
		mysg.releasetime = -1;
	}

	runtime·lock(c);
	if(c->dataqsiz > 0)
		goto asynch;

	if(c->closed)
		goto closed;

	sg = dequeue(&c->sendq);
	if(sg != nil) {
		if(raceenabled)
			racesync(c, sg);
		runtime·unlock(c);

		if(ep != nil)
			c->elemalg->copy(c->elemsize, ep, sg->elem);
		gp = sg->g;
		gp->param = sg;
		if(sg->releasetime)
			sg->releasetime = runtime·cputicks();
		runtime·ready(gp);

		if(selected != nil)
			*selected = true;
		if(received != nil)
			*received = true;
		return;
	}

	if(selected != nil) {
		runtime·unlock(c);
		*selected = false;
		return;
	}

	mysg.elem = ep;
	mysg.g = g;
	mysg.selgen = NOSELGEN;
	g->param = nil;
	enqueue(&c->recvq, &mysg);
	runtime·park(runtime·unlock, c, "chan receive");

	if(g->param == nil) {
		runtime·lock(c);
		if(!c->closed)
			runtime·throw("chanrecv: spurious wakeup");
		goto closed;
	}

	if(received != nil)
		*received = true;
	if(mysg.releasetime > 0)
		runtime·blockevent(mysg.releasetime - t0, 2);
	return;

asynch:
	if(c->qcount <= 0) {
		if(c->closed)
			goto closed;

		if(selected != nil) {
			runtime·unlock(c);
			*selected = false;
			if(received != nil)
				*received = false;
			return;
		}
		mysg.g = g;
		mysg.elem = nil;
		mysg.selgen = NOSELGEN;
		enqueue(&c->recvq, &mysg);
		runtime·park(runtime·unlock, c, "chan receive");

		runtime·lock(c);
		goto asynch;
	}

	if(raceenabled)
		runtime·raceacquire(chanbuf(c, c->recvx));

	if(ep != nil)
		c->elemalg->copy(c->elemsize, ep, chanbuf(c, c->recvx));
	c->elemalg->copy(c->elemsize, chanbuf(c, c->recvx), nil);
	if(++c->recvx == c->dataqsiz)
		c->recvx = 0;
	c->qcount--;

	sg = dequeue(&c->sendq);
	if(sg != nil) {
		gp = sg->g;
		runtime·unlock(c);
		if(sg->releasetime)
			sg->releasetime = runtime·cputicks();
		runtime·ready(gp);
	} else
		runtime·unlock(c);

	if(selected != nil)
		*selected = true;
	if(received != nil)
		*received = true;
	if(mysg.releasetime > 0)
		runtime·blockevent(mysg.releasetime - t0, 2);
	return;

closed:
	if(ep != nil)
		c->elemalg->copy(c->elemsize, ep, nil);
	if(selected != nil)
		*selected = true;
	if(received != nil)
		*received = false;
	if(raceenabled)
		runtime·raceacquire(c);
	runtime·unlock(c);
	if(mysg.releasetime > 0)
		runtime·blockevent(mysg.releasetime - t0, 2);
}
Ejemplo n.º 12
0
/*
 * generic single channel send/recv
 * if the bool pointer is nil,
 * then the full exchange will
 * occur. if pres is not nil,
 * then the protocol will not
 * sleep but return if it could
 * not complete.
 *
 * sleep can wake up with g->param == nil
 * when a channel involved in the sleep has
 * been closed.  it is easiest to loop and re-run
 * the operation; we'll see that it's now closed.
 */
void
runtime·chansend(ChanType *t, Hchan *c, byte *ep, bool *pres, void *pc)
{
	SudoG *sg;
	SudoG mysg;
	G* gp;
	int64 t0;

	if(c == nil) {
		USED(t);
		if(pres != nil) {
			*pres = false;
			return;
		}
		runtime·park(nil, nil, "chan send (nil chan)");
		return;  // not reached
	}

	if(runtime·gcwaiting)
		runtime·gosched();

	if(debug) {
		runtime·printf("chansend: chan=%p; elem=", c);
		c->elemalg->print(c->elemsize, ep);
		runtime·prints("\n");
	}

	t0 = 0;
	mysg.releasetime = 0;
	if(runtime·blockprofilerate > 0) {
		t0 = runtime·cputicks();
		mysg.releasetime = -1;
	}

	runtime·lock(c);
	// TODO(dvyukov): add similar instrumentation to select.
	if(raceenabled)
		runtime·racereadpc(c, pc, runtime·chansend);
	if(c->closed)
		goto closed;

	if(c->dataqsiz > 0)
		goto asynch;

	sg = dequeue(&c->recvq);
	if(sg != nil) {
		if(raceenabled)
			racesync(c, sg);
		runtime·unlock(c);

		gp = sg->g;
		gp->param = sg;
		if(sg->elem != nil)
			c->elemalg->copy(c->elemsize, sg->elem, ep);
		if(sg->releasetime)
			sg->releasetime = runtime·cputicks();
		runtime·ready(gp);

		if(pres != nil)
			*pres = true;
		return;
	}

	if(pres != nil) {
		runtime·unlock(c);
		*pres = false;
		return;
	}

	mysg.elem = ep;
	mysg.g = g;
	mysg.selgen = NOSELGEN;
	g->param = nil;
	enqueue(&c->sendq, &mysg);
	runtime·park(runtime·unlock, c, "chan send");

	if(g->param == nil) {
		runtime·lock(c);
		if(!c->closed)
			runtime·throw("chansend: spurious wakeup");
		goto closed;
	}

	if(mysg.releasetime > 0)
		runtime·blockevent(mysg.releasetime - t0, 2);

	return;

asynch:
	if(c->closed)
		goto closed;

	if(c->qcount >= c->dataqsiz) {
		if(pres != nil) {
			runtime·unlock(c);
			*pres = false;
			return;
		}
		mysg.g = g;
		mysg.elem = nil;
		mysg.selgen = NOSELGEN;
		enqueue(&c->sendq, &mysg);
		runtime·park(runtime·unlock, c, "chan send");

		runtime·lock(c);
		goto asynch;
	}

	if(raceenabled)
		runtime·racerelease(chanbuf(c, c->sendx));

	c->elemalg->copy(c->elemsize, chanbuf(c, c->sendx), ep);
	if(++c->sendx == c->dataqsiz)
		c->sendx = 0;
	c->qcount++;

	sg = dequeue(&c->recvq);
	if(sg != nil) {
		gp = sg->g;
		runtime·unlock(c);
		if(sg->releasetime)
			sg->releasetime = runtime·cputicks();
		runtime·ready(gp);
	} else
		runtime·unlock(c);
	if(pres != nil)
		*pres = true;
	if(mysg.releasetime > 0)
		runtime·blockevent(mysg.releasetime - t0, 2);
	return;

closed:
	runtime·unlock(c);
	runtime·panicstring("send on closed channel");
}