void
chanrecv (unsigned char *ch, unsigned char *val, _Bool *selected,
_Bool *received)
{
struct __go_channel *channel = (struct __go_channel *) ch;
if (channel->element_size <= sizeof (uint64_t))
{
union
{
char b[sizeof (uint64_t)];
uint64_t v;
} u;
if (selected == NULL)
u.v = __go_receive_small_closed (channel, 0, received);
else
{
struct __go_receive_nonblocking_small s;
s = __go_receive_nonblocking_small (channel);
*selected = s.__success || s.__closed;
if (received != NULL)
*received = s.__success;
u.v = s.__val;
}
#ifndef WORDS_BIGENDIAN
__builtin_memcpy (val, u.b, channel->element_size);
#else
__builtin_memcpy (val, u.b + sizeof (uint64_t) - channel->element_size,
channel->element_size);
#endif
}
else
{
if (selected == NULL)
{
_Bool success;
success = __go_receive_big (channel, val, 0);
if (received != NULL)
*received = success;
}
else
{
_Bool got;
_Bool closed;
got = __go_receive_nonblocking_big (channel, val, &closed);
*selected = got || closed;
if (received != NULL)
*received = got;
}
}
}
void
chanrecv (unsigned char *ch, unsigned char *val, _Bool *pres)
{
struct __go_channel *channel = (struct __go_channel *) ch;
if (channel->element_size <= sizeof (uint64_t))
{
union
{
char b[sizeof (uint64_t)];
uint64_t v;
} u;
if (pres == NULL)
u.v = __go_receive_small (channel, 0);
else
{
struct __go_receive_nonblocking_small s;
s = __go_receive_nonblocking_small (channel);
*pres = s.__success;
if (!s.__success)
return;
u.v = s.__val;
}
#ifndef WORDS_BIGENDIAN
__builtin_memcpy (val, u.b, channel->element_size);
#else
__builtin_memcpy (val, u.b + sizeof (uint64_t) - channel->element_size,
channel->element_size);
#endif
}
else
{
if (pres == NULL)
__go_receive_big (channel, val, 0);
else
*pres = __go_receive_nonblocking_big (channel, val);
}
}