int handle_write(struct handle *h, const void *data, int len)
{
assert(h->output);
bufchain_add(&h->u.o.queued_data, data, len);
handle_try_output(&h->u.o);
return bufchain_size(&h->u.o.queued_data);
}
int handle_write(struct handle *h, const void *data, int len)
{
assert(h->type == HT_OUTPUT);
assert(h->u.o.outgoingeof == EOF_NO);
bufchain_add(&h->u.o.queued_data, data, len);
handle_try_output(&h->u.o);
return bufchain_size(&h->u.o.queued_data);
}
void handle_write_eof(struct handle *h)
{
/*
* This function is called when we want to proactively send an
* end-of-file notification on the handle. We can only do this by
* actually closing the handle - so never call this on a
* bidirectional handle if we're still interested in its incoming
* direction!
*/
assert(h->type == HT_OUTPUT);
if (!h->u.o.outgoingeof == EOF_NO) {
h->u.o.outgoingeof = EOF_PENDING;
handle_try_output(&h->u.o);
}
}
void handle_got_event(HANDLE event)
#endif
{
struct handle *h;
assert(handles_by_evtomain);
h = find234(handles_by_evtomain, &event, handle_find_evtomain);
if (!h) {
/*
* This isn't an error condition. If two or more event
* objects were signalled during the same select operation,
* and processing of the first caused the second handle to
* be closed, then it will sometimes happen that we receive
* an event notification here for a handle which is already
* deceased. In that situation we simply do nothing.
*/
#ifdef MPEXT
return 0;
#else
return;
#endif
}
if (h->u.g.moribund) {
/*
* A moribund handle is one which we have either already
* signalled to die, or are waiting until its current I/O op
* completes to do so. Either way, it's treated as already
* dead from the external user's point of view, so we ignore
* the actual I/O result. We just signal the thread to die if
* we haven't yet done so, or destroy the handle if not.
*/
if (h->u.g.done) {
handle_destroy(h);
} else {
h->u.g.done = TRUE;
h->u.g.busy = TRUE;
SetEvent(h->u.g.ev_from_main);
}
#ifdef MPEXT
return 0;
#else
return;
#endif
}
switch (h->type) {
int backlog;
case HT_INPUT:
h->u.i.busy = FALSE;
/*
* A signal on an input handle means data has arrived.
*/
if (h->u.i.len == 0) {
/*
* EOF, or (nearly equivalently) read error.
*/
h->u.i.defunct = TRUE;
h->u.i.gotdata(h, NULL, -h->u.i.readerr);
} else {
backlog = h->u.i.gotdata(h, h->u.i.buffer, h->u.i.len);
handle_throttle(&h->u.i, backlog);
}
#ifdef MPEXT
return 1;
#else
break;
#endif
case HT_OUTPUT:
h->u.o.busy = FALSE;
/*
* A signal on an output handle means we have completed a
* write. Call the callback to indicate that the output
* buffer size has decreased, or to indicate an error.
*/
if (h->u.o.writeerr) {
/*
* Write error. Send a negative value to the callback,
* and mark the thread as defunct (because the output
* thread is terminating by now).
*/
h->u.o.defunct = TRUE;
h->u.o.sentdata(h, -h->u.o.writeerr);
} else {
bufchain_consume(&h->u.o.queued_data, h->u.o.lenwritten);
h->u.o.sentdata(h, bufchain_size(&h->u.o.queued_data));
handle_try_output(&h->u.o);
}
#ifdef MPEXT
return 0;
#else
break;
#endif
case HT_FOREIGN:
/* Just call the callback. */
h->u.f.callback(h->u.f.ctx);
#ifdef MPEXT
return 0;
#else
break;
#endif
}
#ifdef MPEXT
return 0;
#endif
}
void handle_got_event(HANDLE event)
{
struct handle *h;
assert(handles_by_evtomain);
h = find234(handles_by_evtomain, &event, handle_find_evtomain);
if (!h) {
/*
* This isn't an error condition. If two or more event
* objects were signalled during the same select operation,
* and processing of the first caused the second handle to
* be closed, then it will sometimes happen that we receive
* an event notification here for a handle which is already
* deceased. In that situation we simply do nothing.
*/
return;
}
if (h->u.g.moribund) {
/*
* A moribund handle is already treated as dead from the
* external user's point of view, so do nothing with the
* actual event. Just signal the thread to die if
* necessary, or destroy the handle if not.
*/
if (h->u.g.done) {
handle_destroy(h);
} else {
h->u.g.done = TRUE;
h->u.g.busy = TRUE;
SetEvent(h->u.g.ev_from_main);
}
return;
}
if (!h->output) {
int backlog;
h->u.i.busy = FALSE;
/*
* A signal on an input handle means data has arrived.
*/
if (h->u.i.len == 0) {
/*
* EOF, or (nearly equivalently) read error.
*/
h->u.i.gotdata(h, NULL, -h->u.i.readerr);
h->u.i.defunct = TRUE;
} else {
backlog = h->u.i.gotdata(h, h->u.i.buffer, h->u.i.len);
handle_throttle(&h->u.i, backlog);
}
} else {
h->u.o.busy = FALSE;
/*
* A signal on an output handle means we have completed a
* write. Call the callback to indicate that the output
* buffer size has decreased, or to indicate an error.
*/
if (h->u.o.writeerr) {
/*
* Write error. Send a negative value to the callback,
* and mark the thread as defunct (because the output
* thread is terminating by now).
*/
h->u.o.sentdata(h, -h->u.o.writeerr);
h->u.o.defunct = TRUE;
} else {
bufchain_consume(&h->u.o.queued_data, h->u.o.lenwritten);
h->u.o.sentdata(h, bufchain_size(&h->u.o.queued_data));
handle_try_output(&h->u.o);
}
}
}
