150 lines
3.7 KiB
C
150 lines
3.7 KiB
C
/* wait-private.c
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Copyright (C) 2000 Werner Koch (dd9jn)
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Copyright (C) 2001, 2002, 2003 g10 Code GmbH
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This file is part of GPGME.
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GPGME is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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GPGME is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GPGME; if not, write to the Free Software Foundation,
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Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#if HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <assert.h>
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#include "gpgme.h"
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#include "context.h"
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#include "wait.h"
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#include "ops.h"
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#include "io.h"
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#include "util.h"
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/* The private event loops are used for all blocking operations, and
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for the key and trust item listing operations. They are completely
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separated from each other. */
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/* Internal I/O callback functions. */
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/* The add_io_cb and remove_io_cb handlers are shared with the global
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event loops. */
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void
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_gpgme_wait_private_event_cb (void *data, gpgme_event_io_t type,
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void *type_data)
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{
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switch (type)
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{
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case GPGME_EVENT_START:
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/* Nothing to do here, as the wait routine is called after the
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initialization is finished. */
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break;
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case GPGME_EVENT_DONE:
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break;
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case GPGME_EVENT_NEXT_KEY:
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_gpgme_op_keylist_event_cb (data, type, type_data);
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break;
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case GPGME_EVENT_NEXT_TRUSTITEM:
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_gpgme_op_trustlist_event_cb (data, type, type_data);
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break;
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}
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}
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/* If COND is a null pointer, wait until the blocking operation in CTX
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finished and return its error value. Otherwise, wait until COND is
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satisfied or the operation finished. */
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gpgme_error_t
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_gpgme_wait_on_condition (gpgme_ctx_t ctx, volatile int *cond)
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{
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gpgme_error_t err = 0;
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int hang = 1;
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do
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{
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int nr = _gpgme_io_select (ctx->fdt.fds, ctx->fdt.size, 0);
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int i;
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if (nr < 0)
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{
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/* An error occured. Close all fds in this context, and
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signal it. */
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int idx;
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err = GPGME_File_Error;
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for (idx = 0; idx < ctx->fdt.size; idx++)
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if (ctx->fdt.fds[idx].fd != -1)
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_gpgme_io_close (ctx->fdt.fds[idx].fd);
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_gpgme_engine_io_event (ctx->engine, GPGME_EVENT_DONE, &err);
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return err;
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}
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for (i = 0; i < ctx->fdt.size && nr; i++)
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{
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if (ctx->fdt.fds[i].fd != -1 && ctx->fdt.fds[i].signaled)
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{
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struct wait_item_s *item;
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ctx->fdt.fds[i].signaled = 0;
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assert (nr);
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nr--;
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item = (struct wait_item_s *) ctx->fdt.fds[i].opaque;
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err = item->handler (item->handler_value, ctx->fdt.fds[i].fd);
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if (err)
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{
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/* An error occured. Close all fds in this context,
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and signal it. */
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int idx;
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for (idx = 0; idx < ctx->fdt.size; idx++)
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if (ctx->fdt.fds[idx].fd != -1)
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_gpgme_io_close (ctx->fdt.fds[idx].fd);
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_gpgme_engine_io_event (ctx->engine, GPGME_EVENT_DONE, &err);
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return err;
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}
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}
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}
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for (i = 0; i < ctx->fdt.size; i++)
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if (ctx->fdt.fds[i].fd != -1)
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break;
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if (i == ctx->fdt.size)
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{
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_gpgme_engine_io_event (ctx->engine, GPGME_EVENT_DONE, &err);
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hang = 0;
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}
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if (cond && *cond)
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hang = 0;
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}
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while (hang);
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return 0;
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}
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/* Wait until the blocking operation in context CTX has finished and
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return the error value. */
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gpgme_error_t
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_gpgme_wait_one (gpgme_ctx_t ctx)
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{
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return _gpgme_wait_on_condition (ctx, NULL);
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}
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