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+/* wait.h - Definitions for the wait queue interface.
+ Copyright (C) 2000 Werner Koch (dd9jn)
+ Copyright (C) 2001, 2002, 2003, 2004 g10 Code GmbH
+
+ This file is part of GPGME.
+
+ GPGME is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation; either version 2.1 of
+ the License, or (at your option) any later version.
+
+ GPGME is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ 02111-1307, USA. */
+
+#ifndef WAIT_H
+#define WAIT_H
+
+#include "gpgme.h"
+#include "sema.h"
+
+struct fd_table
+{
+ struct io_select_fd_s *fds;
+ size_t size;
+};
+typedef struct fd_table *fd_table_t;
+
+/* Wait items are hooked into the io_select_fd_s to connect an fd with
+ a callback handler. */
+struct wait_item_s
+{
+ gpgme_ctx_t ctx;
+ gpgme_io_cb_t handler;
+ void *handler_value;
+ int dir;
+};
+
+/* A registered fd handler is removed later using the tag that
+ identifies it. */
+struct tag
+{
+ /* The context for which the fd was registered. */
+ gpgme_ctx_t ctx;
+
+ /* The index into the fd table for this context. */
+ int idx;
+
+ /* This is used by the wrappers for the user event loop. */
+ void *user_tag;
+};
+
+
+void _gpgme_fd_table_init (fd_table_t fdt);
+void _gpgme_fd_table_deinit (fd_table_t fdt);
+
+gpgme_error_t _gpgme_add_io_cb (void *data, int fd, int dir,
+ gpgme_io_cb_t fnc, void *fnc_data, void **r_tag);
+void _gpgme_remove_io_cb (void *tag);
+void _gpgme_wait_private_event_cb (void *data, gpgme_event_io_t type,
+ void *type_data);
+void _gpgme_wait_global_event_cb (void *data, gpgme_event_io_t type,
+ void *type_data);
+
+gpgme_error_t _gpgme_wait_user_add_io_cb (void *data, int fd, int dir,
+ gpgme_io_cb_t fnc, void *fnc_data,
+ void **r_tag);
+void _gpgme_wait_user_remove_io_cb (void *tag);
+void _gpgme_wait_user_event_cb (void *data, gpgme_event_io_t type,
+ void *type_data);
+
+gpgme_error_t _gpgme_run_io_cb (struct io_select_fd_s *an_fds, int checked,
+ gpgme_error_t *err);
+
+
+/* Session based interfaces require to make a distinction between IPC
+ errors and operational errors. To glue this into the old
+ interface, I/O handlers (esp. the status handler) are called with a
+ struct as the opaque value that contains the handlers opaque value
+ but also a field for the operational error to be returned. */
+struct io_cb_data
+{
+ /* If this is the first field, the old internal code will still work. */
+ void *handler_value;
+
+ /* The I/O callback can pass an operational error here. */
+ gpgme_error_t op_err;
+};
+
+#endif /* WAIT_H */