88 lines
1.6 KiB
C++
88 lines
1.6 KiB
C++
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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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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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