bindings: cxx: provide line::update()

The C++ bindings are missing the functionality provided by the core C
library's gpiod_line_update(). Extend the line class with the update()
method that allows to re-read the line information from the kernel.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>

diff --git a/bindings/cxx/gpiod.hpp b/bindings/cxx/gpiod.hpp
index cf4489bf5fc6dff19407adf3a3cfd5d49f2e08ae..13b4d5b3421fde755a39af2e0918d2a6e62bb85d 100644 (file)
--- a/bindings/cxx/gpiod.hpp
+++ b/bindings/cxx/gpiod.hpp
@@ -395,6 +395,11 @@ public:
         */
        GPIOD_API const chip& get_chip(void) const;
 
+       /**
+        * @brief Re-read the line info from the kernel.
+        */
+       GPIOD_API void update(void) const;
+
        /**
         * @brief Reset the state of this object.
         *

diff --git a/bindings/cxx/line.cpp b/bindings/cxx/line.cpp
index 4ccbd150d4a0a9c41f2c67edec5fc20ea7144485..b698960393aac3c24c4e5c8db38942e787bb1a79 100644 (file)
--- a/bindings/cxx/line.cpp
+++ b/bindings/cxx/line.cpp
@@ -194,6 +194,17 @@ const chip& line::get_chip(void) const
        return this->_m_chip;
 }
 
+void line::update(void) const
+{
+       this->throw_if_null();
+
+       int ret = ::gpiod_line_update(this->_m_line);
+
+       if (ret < 0)
+               throw ::std::system_error(errno, ::std::system_category(),
+                                         "unable to update the line info");
+}
+
 void line::reset(void)
 {
        this->_m_line = nullptr;

diff --git a/bindings/cxx/tests/tests-line.cpp b/bindings/cxx/tests/tests-line.cpp
index b008c30fa940b65adf28cdddb5ebf05bbb6e7278..3ba2fc2d3922acd09955e3100ac530d1c4c804f3 100644 (file)
--- a/bindings/cxx/tests/tests-line.cpp
+++ b/bindings/cxx/tests/tests-line.cpp
@@ -89,6 +89,11 @@ TEST_CASE("Line information can be correctly retrieved", "[line]")
                REQUIRE(line.is_open_drain());
                REQUIRE_FALSE(line.is_open_source());
        }
+
+       SECTION("update line info")
+       {
+               REQUIRE_NOTHROW(line.update());
+       }
 }
 
 TEST_CASE("Line bulk object works correctly", "[line][bulk]")