Add con_exists function

Checks the all_cons queue and returns true if a given con is found.

diff --git a/include/con.h b/include/con.h
index 69292411df1de14beac6130b3cbf19831ee61b94..b88ea354cd7e0b28e754ed0ac3e97167026d1916 100644 (file)
--- a/include/con.h
+++ b/include/con.h
@@ -165,6 +165,13 @@ Con *con_by_window_id(xcb_window_t window);
  */
 Con *con_by_con_id(long target);
 
+/**
+ * Returns true if the given container (still) exists.
+ * This can be used, e.g., to make sure a container hasn't been closed in the meantime.
+ *
+ */
+bool con_exists(Con *con);
+
 /**
  * Returns the container with the given frame ID or NULL if no such container
  * exists.

diff --git a/src/con.c b/src/con.c
index 29a326e701a2a369737330760d6eb423e2407270..e0901443dc0a1ccb086948868c28d3c282d0841b 100644 (file)
--- a/src/con.c
+++ b/src/con.c
@@ -597,6 +597,15 @@ Con *con_by_con_id(long target) {
     return NULL;
 }
 
+/*
+ * Returns true if the given container (still) exists.
+ * This can be used, e.g., to make sure a container hasn't been closed in the meantime.
+ *
+ */
+bool con_exists(Con *con) {
+    return con_by_con_id((long)con) != NULL;
+}
+
 /*
  * Returns the container with the given frame ID or NULL if no such container
  * exists.