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/*
* SPDX-FileCopyrightText: All Contributors to the PyTango project
*
* SPDX-License-Identifier: LGPL-3.0-or-later
*/
#include "common_header.h"
namespace PyTango {
class AutoTangoMonitor {
Tango::AutoTangoMonitor *mon;
Tango::DeviceImpl *dev;
Tango::DeviceClass *klass;
public:
AutoTangoMonitor(Tango::DeviceImpl *dev_arg) :
mon(),
dev(),
klass() {
dev = dev_arg;
}
AutoTangoMonitor(Tango::DeviceClass *klass_arg) :
mon(),
dev(),
klass() {
klass = klass_arg;
}
void acquire() {
if(mon != nullptr) {
return;
}
if(dev != nullptr) {
py::gil_scoped_release no_gil;
mon = new Tango::AutoTangoMonitor(dev);
} else if(klass != nullptr) {
py::gil_scoped_release no_gil;
mon = new Tango::AutoTangoMonitor(klass);
}
}
void release() {
if(mon != nullptr) {
delete mon;
mon = nullptr;
}
}
~AutoTangoMonitor() {
release();
}
};
class AutoTangoAllowThreads {
public:
AutoTangoAllowThreads(Tango::DeviceImpl *dev) {
Tango::Util *util = Tango::Util::instance();
Tango::SerialModel ser = util->get_serial_model();
switch(ser) {
case Tango::BY_DEVICE:
mon = &(dev->get_dev_monitor());
break;
case Tango::BY_CLASS:
// mon = &(dev->device_class->ext->only_one);
break;
case Tango::BY_PROCESS:
// mon = &(util->ext->only_one);
break;
default:
mon = nullptr;
}
release();
}
void acquire() {
if(mon == nullptr) {
return;
}
py::gil_scoped_release no_gil;
for(int i = 0; i < count; ++i) {
mon->get_monitor();
}
}
protected:
void release() {
if(mon == nullptr) {
return;
}
int cur_thread = omni_thread::self()->id();
int mon_thread = mon->get_locking_thread_id();
// do something only if the monitor was taken by the current thread
if(mon_thread == cur_thread) {
do {
mon->rel_monitor();
mon_thread = mon->get_locking_thread_id();
count++;
} while(mon_thread == cur_thread);
} else {
mon = nullptr;
}
}
private:
Tango::TangoMonitor *mon{nullptr};
int count{0};
omni_thread::ensure_self auto_self;
};
} // namespace PyTango
void export_auto_tango_monitor(py::module &m) {
py::class_<PyTango::AutoTangoMonitor>(m,
"AutoTangoMonitor",
R"doc(
In a tango server, guard the tango monitor within a python context::
with AutoTangoMonitor(dev):
# code here is protected by the tango device monitor
do something
)doc")
.def(py::init<Tango::DeviceImpl *>())
.def(py::init<Tango::DeviceClass *>())
.def("_acquire", &PyTango::AutoTangoMonitor::acquire)
.def("_release", &PyTango::AutoTangoMonitor::release);
py::class_<PyTango::AutoTangoAllowThreads>(m,
"AutoTangoAllowThreads",
R"doc(
In a tango server, free the tango monitor within a context:
with AutoTangoAllowThreads(dev):
# code here is not under the tango device monitor
do something
)doc")
.def(py::init<Tango::DeviceImpl *>(), py::arg("device"))
.def("_acquire", &PyTango::AutoTangoAllowThreads::acquire);
}
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