void
slp_channel_insert(PyChannelObject *channel, PyTaskletObject *task, int dir)
{
SLP_HEADCHAIN_INSERT(PyTaskletObject, channel, task, next, prev);
channel->balance += dir;
task->flags.blocked = dir;
}
void
slp_channel_insert(PyChannelObject *channel, PyTaskletObject *task, int dir, PyTaskletObject *nexttask)
{
if (nexttask)
assert(slp_channel_has_tasklet(channel, nexttask));
else
nexttask = (PyTaskletObject*)channel;
SLP_HEADCHAIN_INSERT(PyTaskletObject, nexttask, task, next, prev);
assert(dir == -1 || dir == 1);
assert(dir * channel->balance >= 0); /* we are going the right way */
channel->balance += dir;
task->flags.blocked = dir;
}