BIF_RETTYPE bit_size_1(BIF_ALIST_1)
{
Uint low_bits;
Uint bytesize;
Uint high_bits;
if (is_binary(BIF_ARG_1)) {
bytesize = binary_size(BIF_ARG_1);
high_bits = bytesize >> ((sizeof(Uint) * 8)-3);
low_bits = (bytesize << 3) + binary_bitsize(BIF_ARG_1);
if (high_bits == 0) {
if (IS_USMALL(0,low_bits)) {
BIF_RET(make_small(low_bits));
} else {
Eterm* hp = HAlloc(BIF_P, BIG_UINT_HEAP_SIZE);
BIF_RET(uint_to_big(low_bits, hp));
}
} else {
Uint sz = BIG_UINT_HEAP_SIZE+1;
Eterm* hp = HAlloc(BIF_P, sz);
hp[0] = make_pos_bignum_header(sz-1);
BIG_DIGIT(hp,0) = low_bits;
BIG_DIGIT(hp,1) = high_bits;
BIF_RET(make_big(hp));
}
} else {
void
erts_link_mbuf_to_proc(struct process *proc, ErlHeapFragment *bp)
{
Eterm* htop = HEAP_TOP(proc);
link_mbuf_to_proc(proc, bp);
if (htop < HEAP_LIMIT(proc)) {
*htop = make_pos_bignum_header(HEAP_LIMIT(proc)-htop-1);
HEAP_TOP(proc) = HEAP_LIMIT(proc);
}
}
BIF_RETTYPE abs_1(BIF_ALIST_1)
{
Eterm res;
Sint i0, i;
Eterm* hp;
/* integer arguments */
if (is_small(BIF_ARG_1)) {
i0 = signed_val(BIF_ARG_1);
i = ERTS_SMALL_ABS(i0);
if (i0 == MIN_SMALL) {
hp = HAlloc(BIF_P, BIG_UINT_HEAP_SIZE);
BIF_RET(uint_to_big(i, hp));
} else {
BIF_RET(make_small(i));
}
} else if (is_big(BIF_ARG_1)) {
if (!big_sign(BIF_ARG_1)) {
BIF_RET(BIF_ARG_1);
} else {
int sz = big_arity(BIF_ARG_1) + 1;
Uint* x;
hp = HAlloc(BIF_P, sz); /* See note at beginning of file */
sz--;
res = make_big(hp);
x = big_val(BIF_ARG_1);
*hp++ = make_pos_bignum_header(sz);
x++; /* skip thing */
while(sz--)
*hp++ = *x++;
BIF_RET(res);
}
} else if (is_float(BIF_ARG_1)) {
FloatDef f;
GET_DOUBLE(BIF_ARG_1, f);
if (f.fd < 0.0) {
hp = HAlloc(BIF_P, FLOAT_SIZE_OBJECT);
f.fd = fabs(f.fd);
res = make_float(hp);
PUT_DOUBLE(f, hp);
BIF_RET(res);
}
else
BIF_RET(BIF_ARG_1);
}
BIF_ERROR(BIF_P, BADARG);
}
static BIF_RETTYPE
dirty_test(Process *c_p, Eterm type, Eterm arg1, Eterm arg2, UWord *I)
{
BIF_RETTYPE ret;
if (am_scheduler == arg1) {
ErtsSchedulerData *esdp;
if (arg2 != am_type)
goto badarg;
esdp = erts_proc_sched_data(c_p);
if (!esdp)
goto scheduler_type_error;
switch (esdp->type) {
case ERTS_SCHED_NORMAL:
ERTS_BIF_PREP_RET(ret, am_normal);
break;
case ERTS_SCHED_DIRTY_CPU:
ERTS_BIF_PREP_RET(ret, am_dirty_cpu);
break;
case ERTS_SCHED_DIRTY_IO:
ERTS_BIF_PREP_RET(ret, am_dirty_io);
break;
default:
scheduler_type_error:
ERTS_BIF_PREP_RET(ret, am_error);
break;
}
}
else if (am_error == arg1) {
switch (arg2) {
case am_notsup:
ERTS_BIF_PREP_ERROR(ret, c_p, EXC_NOTSUP);
break;
case am_undef:
ERTS_BIF_PREP_ERROR(ret, c_p, EXC_UNDEF);
break;
case am_badarith:
ERTS_BIF_PREP_ERROR(ret, c_p, EXC_BADARITH);
break;
case am_noproc:
ERTS_BIF_PREP_ERROR(ret, c_p, EXC_NOPROC);
break;
case am_system_limit:
ERTS_BIF_PREP_ERROR(ret, c_p, SYSTEM_LIMIT);
break;
case am_badarg:
default:
goto badarg;
}
}
else if (am_copy == arg1) {
int i;
Eterm res;
for (res = NIL, i = 0; i < 1000; i++) {
Eterm *hp, sz;
Eterm cpy;
/* We do not want this to be optimized,
but rather the oposite... */
sz = size_object(arg2);
hp = HAlloc(c_p, sz);
cpy = copy_struct(arg2, sz, &hp, &c_p->off_heap);
hp = HAlloc(c_p, 2);
res = CONS(hp, cpy, res);
}
ERTS_BIF_PREP_RET(ret, res);
}
else if (am_send == arg1) {
dirty_send_message(c_p, arg2, am_ok);
ERTS_BIF_PREP_RET(ret, am_ok);
}
else if (ERTS_IS_ATOM_STR("wait", arg1)) {
if (!ms_wait(c_p, arg2, type == am_dirty_cpu))
goto badarg;
ERTS_BIF_PREP_RET(ret, am_ok);
}
else if (ERTS_IS_ATOM_STR("reschedule", arg1)) {
/*
* Reschedule operation after decrement of two until we reach
* zero. Switch between dirty scheduler types when 'n' is
* evenly divided by 4. If the initial value wasn't evenly
* dividable by 2, throw badarg exception.
*/
Eterm next_type;
Sint n;
if (!term_to_Sint(arg2, &n) || n < 0)
goto badarg;
if (n == 0)
ERTS_BIF_PREP_RET(ret, am_ok);
else {
Eterm argv[3];
Eterm eint = erts_make_integer((Uint) (n - 2), c_p);
if (n % 4 != 0)
next_type = type;
else {
switch (type) {
case am_dirty_cpu: next_type = am_dirty_io; break;
case am_dirty_io: next_type = am_normal; break;
case am_normal: next_type = am_dirty_cpu; break;
default: goto badarg;
}
}
switch (next_type) {
case am_dirty_io:
argv[0] = arg1;
argv[1] = eint;
ret = erts_schedule_bif(c_p,
argv,
I,
erts_debug_dirty_io_2,
ERTS_SCHED_DIRTY_IO,
am_erts_debug,
am_dirty_io,
2);
break;
case am_dirty_cpu:
argv[0] = arg1;
argv[1] = eint;
ret = erts_schedule_bif(c_p,
argv,
I,
erts_debug_dirty_cpu_2,
ERTS_SCHED_DIRTY_CPU,
am_erts_debug,
am_dirty_cpu,
2);
break;
case am_normal:
argv[0] = am_normal;
argv[1] = arg1;
argv[2] = eint;
ret = erts_schedule_bif(c_p,
argv,
I,
erts_debug_dirty_3,
ERTS_SCHED_NORMAL,
am_erts_debug,
am_dirty,
3);
break;
default:
goto badarg;
}
}
}
else if (ERTS_IS_ATOM_STR("ready_wait6_done", arg1)) {
ERTS_DECL_AM(ready);
ERTS_DECL_AM(done);
dirty_send_message(c_p, arg2, AM_ready);
ms_wait(c_p, make_small(6000), 0);
dirty_send_message(c_p, arg2, AM_done);
ERTS_BIF_PREP_RET(ret, am_ok);
}
else if (ERTS_IS_ATOM_STR("alive_waitexiting", arg1)) {
Process *real_c_p = erts_proc_shadow2real(c_p);
Eterm *hp, *hp2;
Uint sz;
int i;
ErtsSchedulerData *esdp = erts_proc_sched_data(c_p);
int dirty_io = esdp->type == ERTS_SCHED_DIRTY_IO;
if (ERTS_PROC_IS_EXITING(real_c_p))
goto badarg;
dirty_send_message(c_p, arg2, am_alive);
/* Wait until dead */
while (!ERTS_PROC_IS_EXITING(real_c_p)) {
if (dirty_io)
ms_wait(c_p, make_small(100), 0);
else
erts_thr_yield();
}
ms_wait(c_p, make_small(1000), 0);
/* Should still be able to allocate memory */
hp = HAlloc(c_p, 3); /* Likely on heap */
sz = 10000;
hp2 = HAlloc(c_p, sz); /* Likely in heap fragment */
*hp2 = make_pos_bignum_header(sz);
for (i = 1; i < sz; i++)
hp2[i] = (Eterm) 4711;
ERTS_BIF_PREP_RET(ret, TUPLE2(hp, am_ok, make_big(hp2)));
}
else {
badarg:
ERTS_BIF_PREP_ERROR(ret, c_p, BADARG);
}
return ret;
}
