David Robillard
da45f489dd
git-svn-id: svn://localhost/ardour2/branches/3.0@3303 d708f5d6-7413-0410-9779-e7cbd77b26cf
109 lines
2.4 KiB
C++
109 lines
2.4 KiB
C++
/*
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Copyright (C) 2000-2007 Paul Davis
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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 2 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <cstring>
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#include <stdint.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <pbd/base_ui.h>
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#include <pbd/error.h>
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#include <pbd/compose.h>
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#include <pbd/failed_constructor.h>
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#include "i18n.h"
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using namespace std;
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using namespace PBD;
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uint32_t BaseUI::rt_bit = 1;
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BaseUI::RequestType BaseUI::CallSlot = BaseUI::new_request_type();
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BaseUI::BaseUI (string str, bool with_signal_pipe)
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: _name (str)
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{
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/* odd pseudo-singleton semantics */
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base_ui_instance = this;
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signal_pipe[0] = -1;
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signal_pipe[1] = -1;
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if (with_signal_pipe) {
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if (setup_signal_pipe ()) {
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throw failed_constructor ();
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}
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}
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}
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BaseUI::~BaseUI()
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{
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if (signal_pipe[0] >= 0) {
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close (signal_pipe[0]);
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}
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if (signal_pipe[1] >= 0) {
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close (signal_pipe[1]);
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}
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}
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BaseUI::RequestType
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BaseUI::new_request_type ()
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{
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RequestType rt;
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/* XXX catch out-of-range */
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rt = RequestType (rt_bit);
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rt_bit <<= 1;
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return rt;
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}
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int
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BaseUI::setup_signal_pipe ()
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{
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/* setup the pipe that other threads send us notifications/requests
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through.
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*/
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if (pipe (signal_pipe)) {
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error << string_compose (_("%1-UI: cannot create error signal pipe (%2)"), _name, std::strerror (errno))
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<< endmsg;
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return -1;
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}
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if (fcntl (signal_pipe[0], F_SETFL, O_NONBLOCK)) {
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error << string_compose (_("%1-UI: cannot set O_NONBLOCK on signal read pipe (%2)"), _name, std::strerror (errno))
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<< endmsg;
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return -1;
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}
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if (fcntl (signal_pipe[1], F_SETFL, O_NONBLOCK)) {
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error << string_compose (_("%1-UI: cannot set O_NONBLOCK on signal write pipe (%2)"), _name, std::strerror (errno))
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<< endmsg;
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return -1;
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}
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return 0;
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}
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