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// SPDX-License-Identifier: LGPL-2.1-or-later
// SPDX-FileCopyrightText: 2021-2022 Bartosz Golaszewski <brgl@bgdev.pl>
#include <ostream>
#include <utility>
#include "internal.hpp"
namespace gpiod {
namespace {
chip_ptr open_chip(const ::std::filesystem::path& path)
{
chip_ptr chip(::gpiod_chip_open(path.c_str()));
if (!chip)
throw_from_errno("unable to open the GPIO device " + path.string());
return chip;
}
} /* namespace */
chip::impl::impl(const ::std::filesystem::path& path)
: chip(open_chip(path))
{
}
void chip::impl::throw_if_closed() const
{
if (!this->chip)
throw chip_closed("GPIO chip has been closed");
}
GPIOD_CXX_API chip::chip(const ::std::filesystem::path& path)
: _m_priv(new impl(path))
{
}
chip::chip(const chip& other)
: _m_priv(other._m_priv)
{
}
GPIOD_CXX_API chip::chip(chip&& other) noexcept
: _m_priv(::std::move(other._m_priv))
{
}
GPIOD_CXX_API chip::~chip()
{
}
GPIOD_CXX_API chip& chip::operator=(chip&& other) noexcept
{
this->_m_priv = ::std::move(other._m_priv);
return *this;
}
GPIOD_CXX_API chip::operator bool() const noexcept
{
return this->_m_priv->chip.get() != nullptr;
}
GPIOD_CXX_API void chip::close()
{
this->_m_priv->throw_if_closed();
this->_m_priv->chip.reset();
}
GPIOD_CXX_API ::std::filesystem::path chip::path() const
{
this->_m_priv->throw_if_closed();
return ::gpiod_chip_get_path(this->_m_priv->chip.get());
}
GPIOD_CXX_API chip_info chip::get_info() const
{
this->_m_priv->throw_if_closed();
chip_info_ptr info(::gpiod_chip_get_info(this->_m_priv->chip.get()));
if (!info)
throw_from_errno("failed to retrieve GPIO chip info");
chip_info ret;
ret._m_priv->set_info_ptr(info);
return ret;
}
GPIOD_CXX_API line_info chip::get_line_info(line::offset offset) const
{
this->_m_priv->throw_if_closed();
line_info_ptr info(::gpiod_chip_get_line_info(this->_m_priv->chip.get(), offset));
if (!info)
throw_from_errno("unable to retrieve GPIO line info");
line_info ret;
ret._m_priv->set_info_ptr(info);
return ret;
}
GPIOD_CXX_API line_info chip::watch_line_info(line::offset offset) const
{
this->_m_priv->throw_if_closed();
line_info_ptr info(::gpiod_chip_watch_line_info(this->_m_priv->chip.get(), offset));
if (!info)
throw_from_errno("unable to start watching GPIO line info changes");
line_info ret;
ret._m_priv->set_info_ptr(info);
return ret;
}
GPIOD_CXX_API void chip::unwatch_line_info(line::offset offset) const
{
this->_m_priv->throw_if_closed();
int ret = ::gpiod_chip_unwatch_line_info(this->_m_priv->chip.get(), offset);
if (ret)
throw_from_errno("unable to unwatch line status changes");
}
GPIOD_CXX_API int chip::fd() const
{
this->_m_priv->throw_if_closed();
return ::gpiod_chip_get_fd(this->_m_priv->chip.get());
}
GPIOD_CXX_API bool chip::wait_info_event(const ::std::chrono::nanoseconds& timeout) const
{
this->_m_priv->throw_if_closed();
int ret = ::gpiod_chip_wait_info_event(this->_m_priv->chip.get(), timeout.count());
if (ret < 0)
throw_from_errno("error waiting for info events");
return ret;
}
GPIOD_CXX_API info_event chip::read_info_event() const
{
this->_m_priv->throw_if_closed();
info_event_ptr event(gpiod_chip_read_info_event(this->_m_priv->chip.get()));
if (!event)
throw_from_errno("error reading the line info event_handle");
info_event ret;
ret._m_priv->set_info_event_ptr(event);
return ret;
}
GPIOD_CXX_API int chip::get_line_offset_from_name(const ::std::string& name) const
{
this->_m_priv->throw_if_closed();
int ret = ::gpiod_chip_get_line_offset_from_name(this->_m_priv->chip.get(), name.c_str());
if (ret < 0) {
if (errno == ENOENT)
return -1;
throw_from_errno("error looking up line by name");
}
return ret;
}
GPIOD_CXX_API request_builder chip::prepare_request()
{
return request_builder(*this);
}
GPIOD_CXX_API ::std::ostream& operator<<(::std::ostream& out, const chip& chip)
{
if (!chip)
out << "gpiod::chip(closed)";
else
out << "gpiod::chip(path=" << chip.path() <<
", info=" << chip.get_info() << ")";
return out;
}
} /* namespace gpiod */
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