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authorAnas Nashif <anas.nashif@intel.com>2013-02-19 16:22:18 (GMT)
committerAnas Nashif <anas.nashif@intel.com>2013-02-19 16:22:18 (GMT)
commit26fb537f9cf011eaeaf975adcad5e8e9154d04fd (patch)
treeddc2171273fca8b730b9c496e1b5ed3b01878577 /src/wait-private.c
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Imported Upstream version 1.3.2upstream/1.3.2upstream
Diffstat (limited to 'src/wait-private.c')
-rw-r--r--src/wait-private.c179
1 files changed, 179 insertions, 0 deletions
diff --git a/src/wait-private.c b/src/wait-private.c
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+/* wait-private.c
+ Copyright (C) 2000 Werner Koch (dd9jn)
+ Copyright (C) 2001, 2002, 2003, 2004, 2005 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. */
+
+#if HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <assert.h>
+#include <errno.h>
+
+#include "gpgme.h"
+#include "context.h"
+#include "wait.h"
+#include "ops.h"
+#include "priv-io.h"
+#include "util.h"
+
+
+/* The private event loops are used for all blocking operations, and
+ for the key and trust item listing operations. They are completely
+ separated from each other. */
+
+
+/* Internal I/O callback functions. */
+
+/* The add_io_cb and remove_io_cb handlers are shared with the global
+ event loops. */
+
+void
+_gpgme_wait_private_event_cb (void *data, gpgme_event_io_t type,
+ void *type_data)
+{
+ switch (type)
+ {
+ case GPGME_EVENT_START:
+ /* Nothing to do here, as the wait routine is called after the
+ initialization is finished. */
+ break;
+
+ case GPGME_EVENT_DONE:
+ break;
+
+ case GPGME_EVENT_NEXT_KEY:
+ _gpgme_op_keylist_event_cb (data, type, type_data);
+ break;
+
+ case GPGME_EVENT_NEXT_TRUSTITEM:
+ _gpgme_op_trustlist_event_cb (data, type, type_data);
+ break;
+ }
+}
+
+
+/* If COND is a null pointer, wait until the blocking operation in CTX
+ finished and return its error value. Otherwise, wait until COND is
+ satisfied or the operation finished. */
+gpgme_error_t
+_gpgme_wait_on_condition (gpgme_ctx_t ctx, volatile int *cond,
+ gpgme_error_t *op_err_p)
+{
+ gpgme_error_t err = 0;
+ int hang = 1;
+
+ if (op_err_p)
+ *op_err_p = 0;
+
+ do
+ {
+ int nr = _gpgme_io_select (ctx->fdt.fds, ctx->fdt.size, 0);
+ unsigned int i;
+
+ if (nr < 0)
+ {
+ /* An error occured. Close all fds in this context, and
+ signal it. */
+ err = gpg_error_from_errno (errno);
+ _gpgme_cancel_with_err (ctx, err, 0);
+
+ return err;
+ }
+
+ for (i = 0; i < ctx->fdt.size && nr; i++)
+ {
+ if (ctx->fdt.fds[i].fd != -1 && ctx->fdt.fds[i].signaled)
+ {
+ gpgme_error_t op_err = 0;
+
+ ctx->fdt.fds[i].signaled = 0;
+ assert (nr);
+ nr--;
+
+ LOCK (ctx->lock);
+ if (ctx->canceled)
+ err = gpg_error (GPG_ERR_CANCELED);
+ UNLOCK (ctx->lock);
+
+ if (!err)
+ err = _gpgme_run_io_cb (&ctx->fdt.fds[i], 0, &op_err);
+ if (err)
+ {
+ /* An error occured. Close all fds in this context,
+ and signal it. */
+ _gpgme_cancel_with_err (ctx, err, 0);
+
+ return err;
+ }
+ else if (op_err)
+ {
+ /* An operational error occured. Cancel the current
+ operation but not the session, and signal it. */
+ _gpgme_cancel_with_err (ctx, 0, op_err);
+
+ /* NOTE: This relies on the operational error being
+ generated after the operation really has
+ completed, for example after no further status
+ line output is generated. Otherwise the
+ following I/O will spill over into the next
+ operation. */
+ if (op_err_p)
+ *op_err_p = op_err;
+ return 0;
+ }
+ }
+ }
+
+ for (i = 0; i < ctx->fdt.size; i++)
+ if (ctx->fdt.fds[i].fd != -1)
+ break;
+ if (i == ctx->fdt.size)
+ {
+ struct gpgme_io_event_done_data data;
+ data.err = 0;
+ data.op_err = 0;
+ _gpgme_engine_io_event (ctx->engine, GPGME_EVENT_DONE, &data);
+ hang = 0;
+ }
+ if (cond && *cond)
+ hang = 0;
+ }
+ while (hang);
+
+ return 0;
+}
+
+
+/* Wait until the blocking operation in context CTX has finished and
+ return the error value. This variant can not be used for
+ session-based protocols. */
+gpgme_error_t
+_gpgme_wait_one (gpgme_ctx_t ctx)
+{
+ return _gpgme_wait_on_condition (ctx, NULL, NULL);
+}
+
+/* Wait until the blocking operation in context CTX has finished and
+ return the error value. This is the right variant to use for
+ sesion-based protocols. */
+gpgme_error_t
+_gpgme_wait_one_ext (gpgme_ctx_t ctx, gpgme_error_t *op_err)
+{
+ return _gpgme_wait_on_condition (ctx, NULL, op_err);
+}