void *privdata; /* for client to remember who they are */
};
+typedef enum { HT_INPUT, HT_OUTPUT, HT_FOREIGN } HandleType;
+
/* ----------------------------------------------------------------------
* Input threads.
*/
* Data only ever read or written by the main thread.
*/
bufchain queued_data; /* data still waiting to be written */
+ enum { EOF_NO, EOF_PENDING, EOF_SENT } outgoingeof;
/*
* Callback function called when the backlog in the bufchain
ctx->len = sendlen;
SetEvent(ctx->ev_from_main);
ctx->busy = TRUE;
+ } else if (!ctx->busy && bufchain_size(&ctx->queued_data) == 0 &&
+ ctx->outgoingeof == EOF_PENDING) {
+ CloseHandle(ctx->h);
+ ctx->h = INVALID_HANDLE_VALUE;
+ ctx->outgoingeof = EOF_SENT;
}
}
+/* ----------------------------------------------------------------------
+ * 'Foreign events'. These are handle structures which just contain a
+ * single event object passed to us by another module such as
+ * winnps.c, so that they can make use of our handle_get_events /
+ * handle_got_event mechanism for communicating with application main
+ * loops.
+ */
+struct handle_foreign {
+ /*
+ * Copy of the handle_generic structure.
+ */
+ HANDLE h; /* the handle itself */
+ HANDLE ev_to_main; /* event used to signal main thread */
+ HANDLE ev_from_main; /* event used to signal back to us */
+ int moribund; /* are we going to kill this soon? */
+ int done; /* request subthread to terminate */
+ int defunct; /* has the subthread already gone? */
+ int busy; /* operation currently in progress? */
+ void *privdata; /* for client to remember who they are */
+
+ /*
+ * Our own data, just consisting of knowledge of who to call back.
+ */
+ void (*callback)(void *);
+ void *ctx;
+};
+
/* ----------------------------------------------------------------------
* Unified code handling both input and output threads.
*/
struct handle {
- int output;
+ HandleType type;
union {
struct handle_generic g;
struct handle_input i;
struct handle_output o;
+ struct handle_foreign f;
} u;
};
struct handle *h = snew(struct handle);
DWORD in_threadid; /* required for Win9x */
- h->output = FALSE;
+ h->type = HT_INPUT;
h->u.i.h = handle;
h->u.i.ev_to_main = CreateEvent(NULL, FALSE, FALSE, NULL);
h->u.i.ev_from_main = CreateEvent(NULL, FALSE, FALSE, NULL);
struct handle *h = snew(struct handle);
DWORD out_threadid; /* required for Win9x */
- h->output = TRUE;
+ h->type = HT_OUTPUT;
h->u.o.h = handle;
h->u.o.ev_to_main = CreateEvent(NULL, FALSE, FALSE, NULL);
h->u.o.ev_from_main = CreateEvent(NULL, FALSE, FALSE, NULL);
h->u.o.done = FALSE;
h->u.o.privdata = privdata;
bufchain_init(&h->u.o.queued_data);
+ h->u.o.outgoingeof = EOF_NO;
h->u.o.sentdata = sentdata;
h->u.o.flags = flags;
return h;
}
+struct handle *handle_add_foreign_event(HANDLE event,
+ void (*callback)(void *), void *ctx)
+{
+ struct handle *h = snew(struct handle);
+
+ h->type = HT_FOREIGN;
+ h->u.f.h = INVALID_HANDLE_VALUE;
+ h->u.f.ev_to_main = event;
+ h->u.f.ev_from_main = INVALID_HANDLE_VALUE;
+ h->u.f.defunct = TRUE; /* we have no thread in the first place */
+ h->u.f.moribund = FALSE;
+ h->u.f.done = FALSE;
+ h->u.f.privdata = NULL;
+ h->u.f.callback = callback;
+ h->u.f.ctx = ctx;
+ h->u.f.busy = TRUE;
+
+ if (!handles_by_evtomain)
+ handles_by_evtomain = newtree234(handle_cmp_evtomain);
+ add234(handles_by_evtomain, h);
+
+ return h;
+}
+
int handle_write(struct handle *h, const void *data, int len)
{
- assert(h->output);
+ 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);
+ }
+}
+
HANDLE *handle_get_events(int *nevents)
{
HANDLE *ret;
static void handle_destroy(struct handle *h)
{
- if (h->output)
+ if (h->type == HT_OUTPUT)
bufchain_clear(&h->u.o.queued_data);
CloseHandle(h->u.g.ev_from_main);
CloseHandle(h->u.g.ev_to_main);
return;
}
- if (!h->output) {
+ switch (h->type) {
int backlog;
+ case HT_INPUT:
h->u.i.busy = FALSE;
/*
backlog = h->u.i.gotdata(h, h->u.i.buffer, h->u.i.len);
handle_throttle(&h->u.i, backlog);
}
- } else {
+ break;
+
+ case HT_OUTPUT:
h->u.o.busy = FALSE;
/*
h->u.o.sentdata(h, bufchain_size(&h->u.o.queued_data));
handle_try_output(&h->u.o);
}
+ break;
+
+ case HT_FOREIGN:
+ /* Just call the callback. */
+ h->u.f.callback(h->u.f.ctx);
+ break;
}
}
void handle_unthrottle(struct handle *h, int backlog)
{
- assert(!h->output);
+ assert(h->type == HT_INPUT);
handle_throttle(&h->u.i, backlog);
}
int handle_backlog(struct handle *h)
{
- assert(h->output);
+ assert(h->type == HT_OUTPUT);
return bufchain_size(&h->u.o.queued_data);
}
projects / PuTTY.git / blobdiff