- from https://github.com/pld-linux/pld-builder.new

[TLD.git] / pld-builder.new / PLD_Builder / lock.py

diff --git a/pld-builder.new/PLD_Builder/lock.py b/pld-builder.new/PLD_Builder/lock.py
new file mode 100644 (file)
index 0000000..942cce5
--- /dev/null
+++ b/pld-builder.new/PLD_Builder/lock.py
@@ -0,0 +1,21 @@
+# vi: encoding=utf-8 ts=8 sts=4 sw=4 et
+
+import fcntl
+
+import path
+
+locks_list = []
+
+def lock(n, non_block = 0):
+    f = open(path.lock_dir + '/' + n, "a")
+    # blah, otherwise it gets garbage collected and doesn't work
+    locks_list.append(f)
+    if non_block:
+        try:
+            fcntl.flock(f, fcntl.LOCK_EX | fcntl.LOCK_NB)
+        except:
+            f.close()
+            return None
+    else:
+        fcntl.flock(f, fcntl.LOCK_EX)
+    return f