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7d84267923
This is a brute force variant, trying twice a second. We'll have better variants with tmsgd in the future. Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
106 lines
2.6 KiB
C
106 lines
2.6 KiB
C
/*
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* Unix SMB/CIFS implementation.
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* Wait for process death
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* Copyright (C) Volker Lendecke 2016
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "replace.h"
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#include <tevent.h>
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#include <talloc.h>
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#include "serverid.h"
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#include "server_id_watch.h"
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#include "messages.h"
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#include "lib/util/tevent_unix.h"
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struct server_id_watch_state {
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struct tevent_context *ev;
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struct server_id pid;
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};
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static void server_id_watch_waited(struct tevent_req *subreq);
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struct tevent_req *server_id_watch_send(TALLOC_CTX *mem_ctx,
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struct tevent_context *ev,
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struct messaging_context *msg,
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struct server_id pid)
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{
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struct tevent_req *req, *subreq;
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struct server_id_watch_state *state;
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req = tevent_req_create(mem_ctx, &state, struct server_id_watch_state);
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if (req == NULL) {
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return NULL;
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}
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state->ev = ev;
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state->pid = pid;
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if (!serverid_exists(&state->pid)) {
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tevent_req_done(req);
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return tevent_req_post(req, ev);
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}
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subreq = tevent_wakeup_send(state, ev, timeval_current_ofs(0, 500000));
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if (tevent_req_nomem(subreq, req)) {
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return tevent_req_post(req, ev);
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}
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tevent_req_set_callback(subreq, server_id_watch_waited, req);
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return req;
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}
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static void server_id_watch_waited(struct tevent_req *subreq)
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{
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struct tevent_req *req = tevent_req_callback_data(
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subreq, struct tevent_req);
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struct server_id_watch_state *state = tevent_req_data(
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req, struct server_id_watch_state);
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bool ok;
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ok = tevent_wakeup_recv(subreq);
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TALLOC_FREE(subreq);
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if (!ok) {
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tevent_req_oom(req);
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return;
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}
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if (!serverid_exists(&state->pid)) {
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tevent_req_done(req);
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return;
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}
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subreq = tevent_wakeup_send(state, state->ev,
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timeval_current_ofs(0, 500000));
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if (tevent_req_nomem(subreq, req)) {
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return;
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}
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tevent_req_set_callback(subreq, server_id_watch_waited, req);
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}
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int server_id_watch_recv(struct tevent_req *req, struct server_id *pid)
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{
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struct server_id_watch_state *state = tevent_req_data(
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req, struct server_id_watch_state);
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int err;
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if (tevent_req_is_unix_error(req, &err)) {
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return err;
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}
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if (pid) {
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*pid = state->pid;
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}
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return 0;
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}
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