#include <errno.h>
#include <stdlib.h>
#include <assert.h>
-#include <poll.h>
#include <unistd.h>
#include <fcntl.h>
case 1: /* Done: get next plan. */
if (timeout_active(conn))
backend_del_timeout(conn);
+ /* In case they call io_duplex, clear our poll flags so
+ * both sides don't seem to be both doing read or write
+ * (See assert(!mask || pfd->events != mask) in poll.c) */
+ conn->plan.pollflag = 0;
conn->plan.next(conn, conn->plan.next_arg);
break;
default:
return true;
}
+/* Always done: call the next thing. */
+static int do_always(int fd, struct io_plan *plan)
+{
+ return 1;
+}
+
+struct io_plan io_always_(struct io_plan (*cb)(struct io_conn *, void *),
+ void *arg)
+{
+ struct io_plan plan;
+
+ assert(cb);
+ plan.io = do_always;
+ plan.next = cb;
+ plan.next_arg = arg;
+ plan.pollflag = POLLALWAYS;
+
+ return plan;
+}
+
/* Returns true if we're finished. */
static int do_write(int fd, struct io_plan *plan)
{
struct io_plan plan;
assert(cb);
+
+ if (len == 0)
+ return io_always_(cb, arg);
+
plan.u1.const_vp = data;
plan.u2.s = len;
plan.io = do_write;
struct io_plan plan;
assert(cb);
+
+ if (len == 0)
+ return io_always_(cb, arg);
+
plan.u1.cp = data;
plan.u2.s = len;
plan.io = do_read;
plan.next = cb;
plan.next_arg = arg;
+
plan.pollflag = POLLIN;
return plan;
struct io_plan plan;
assert(cb);
+
+ if (*len == 0)
+ return io_always_(cb, arg);
+
plan.u1.cp = data;
plan.u2.vp = len;
plan.io = do_read_partial;
struct io_plan plan;
assert(cb);
+
+ if (*len == 0)
+ return io_always_(cb, arg);
+
plan.u1.const_vp = data;
plan.u2.vp = len;
plan.io = do_write_partial;
return plan;
}
+bool io_is_idle(const struct io_conn *conn)
+{
+ return conn->plan.io == NULL;
+}
+
void io_wake_(struct io_conn *conn, struct io_plan plan)
{
void io_ready(struct io_conn *conn)
{
+ /* Beware io_close_other! */
+ if (!conn->plan.next)
+ return;
+
set_current(conn);
switch (conn->plan.io(conn->fd.fd, &conn->plan)) {
case -1: /* Failure means a new plan: close up. */
case 1: /* Done: get next plan. */
if (timeout_active(conn))
backend_del_timeout(conn);
+ /* In case they call io_duplex, clear our poll flags so
+ * both sides don't seem to be both doing read or write
+ * (See assert(!mask || pfd->events != mask) in poll.c) */
+ conn->plan.pollflag = 0;
conn->plan = conn->plan.next(conn, conn->plan.next_arg);
backend_plan_changed(conn);
}
return io_close();
}
+void io_close_other(struct io_conn *conn)
+{
+ conn->plan = io_close_();
+ backend_plan_changed(conn);
+}
+
/* Exit the loop, returning this (non-NULL) arg. */
struct io_plan io_break_(void *ret, struct io_plan plan)
{
return plan;
}
+static struct io_plan io_never_called(struct io_conn *conn, void *arg)
+{
+ abort();
+}
+
+struct io_plan io_never(void)
+{
+ return io_always_(io_never_called, NULL);
+}
+
+int io_conn_fd(const struct io_conn *conn)
+{
+ return conn->fd.fd;
+}
+
void io_set_alloc(void *(*allocfn)(size_t size),
void *(*reallocfn)(void *ptr, size_t size),
void (*freefn)(void *ptr))