From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Date: Sat, 14 Sep 2019 13:18:20 +0000 (+0200)
Subject: bindings: cxx: provide line::update()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=0297ef69af3c1005edd0c1eea2dc38c0b6e64dad;p=qemu-gpiodev%2Flibgpiod.git

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 cf4489b..13b4d5b 100644
--- 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 4ccbd15..b698960 100644
--- 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 b008c30..3ba2fc2 100644
--- 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]")