From: Bartosz Golaszewski <bartekgola@gmail.com>
Date: Thu, 28 Sep 2017 07:54:10 +0000 (+0200)
Subject: core: implement gpiod_line_close_chip()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=7a9dae7e32d58b3d52d40de5adfeb631b9d6dbaf;p=qemu-gpiodev%2Flibgpiod.git

core: implement gpiod_line_close_chip()

This function works nicely with gpiod_line_find_by_name() which
returns a line object whose owning chip must be later freed by the
caller. With this routine the caller can skip creating a temporary
chip object.

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
---

diff --git a/include/gpiod.h b/include/gpiod.h
index 6853884..506f3e4 100644
--- a/include/gpiod.h
+++ b/include/gpiod.h
@@ -877,6 +877,14 @@ int gpiod_line_set_value_bulk(struct gpiod_line_bulk *bulk,
  */
 struct gpiod_line * gpiod_line_find_by_name(const char *name) GPIOD_API;
 
+/**
+ * @brief Close a GPIO chip owning this line and release all resources.
+ * @param line GPIO line object
+ *
+ * After this function returns, the line must no longer be used.
+ */
+void gpiod_line_close_chip(struct gpiod_line *line) GPIOD_API;
+
 /**
  * @brief Get the handle to the GPIO chip controlling this line.
  * @param line The GPIO line object.
diff --git a/src/lib/core.c b/src/lib/core.c
index a19ed57..2dc78b4 100644
--- a/src/lib/core.c
+++ b/src/lib/core.c
@@ -938,6 +938,13 @@ struct gpiod_line * gpiod_line_find_by_name(const char *name)
 	return NULL;
 }
 
+void gpiod_line_close_chip(struct gpiod_line *line)
+{
+	struct gpiod_chip *chip = gpiod_line_get_chip(line);
+
+	gpiod_chip_close(chip);
+}
+
 int gpiod_line_event_wait(struct gpiod_line *line,
 			  const struct timespec *timeout)
 {