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#include <stdint.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <pbd/base_ui.h>
#include <pbd/error.h>
#include <pbd/compose.h>
#include <pbd/failed_constructor.h>
#include "i18n.h"
using namespace std;
using namespace PBD;
uint32_t BaseUI::rt_bit = 1;
BaseUI::RequestType BaseUI::CallSlot = BaseUI::new_request_type();
BaseUI::BaseUI (string str, bool with_signal_pipe)
: _name (str)
{
/* odd pseudo-singleton semantics */
base_ui_instance = this;
signal_pipe[0] = -1;
signal_pipe[1] = -1;
if (with_signal_pipe) {
if (setup_signal_pipe ()) {
throw failed_constructor ();
}
}
}
BaseUI::~BaseUI()
{
if (signal_pipe[0] >= 0) {
close (signal_pipe[0]);
}
if (signal_pipe[1] >= 0) {
close (signal_pipe[1]);
}
}
BaseUI::RequestType
BaseUI::new_request_type ()
{
RequestType rt;
/* XXX catch out-of-range */
rt = RequestType (rt_bit);
rt_bit <<= 1;
return rt;
}
int
BaseUI::setup_signal_pipe ()
{
/* setup the pipe that other threads send us notifications/requests
through.
*/
if (pipe (signal_pipe)) {
error << string_compose (_("%1-UI: cannot create error signal pipe (%2)"), _name, std::strerror (errno))
<< endmsg;
return -1;
}
if (fcntl (signal_pipe[0], F_SETFL, O_NONBLOCK)) {
error << string_compose (_("%1-UI: cannot set O_NONBLOCK on signal read pipe (%2)"), _name, std::strerror (errno))
<< endmsg;
return -1;
}
if (fcntl (signal_pipe[1], F_SETFL, O_NONBLOCK)) {
error << string_compose (_("%1-UI: cannot set O_NONBLOCK on signal write pipe (%2)"), _name, std::strerror (errno))
<< endmsg;
return -1;
}
return 0;
}
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