1 files changed, 74 insertions, 0 deletions

diff --git a/bitbake/lib/bb/remotedata.py b/bitbake/lib/bb/remotedata.py
new file mode 100644
index 0000000000..932ee430ea
--- /dev/null
+++ b/bitbake/lib/bb/remotedata.py
@@ -0,0 +1,74 @@
+"""
+BitBake 'remotedata' module
+
+Provides support for using a datastore from the bitbake client
+"""
+
+# Copyright (C) 2016  Intel Corporation
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+import bb.data
+
+class RemoteDatastores:
+    """Used on the server side to manage references to server-side datastores"""
+    def __init__(self, cooker):
+        self.cooker = cooker
+        self.datastores = {}
+        self.locked = []
+        self.nextindex = 1
+
+    def __len__(self):
+        return len(self.datastores)
+
+    def __getitem__(self, key):
+        if key is None:
+            return self.cooker.data
+        else:
+            return self.datastores[key]
+
+    def items(self):
+        return self.datastores.items()
+
+    def store(self, d, locked=False):
+        """
+        Put a datastore into the collection. If locked=True then the datastore
+        is understood to be managed externally and cannot be released by calling
+        release().
+        """
+        idx = self.nextindex
+        self.datastores[idx] = d
+        if locked:
+            self.locked.append(idx)
+        self.nextindex += 1
+        return idx
+
+    def check_store(self, d, locked=False):
+        """
+        Put a datastore into the collection if it's not already in there;
+        in either case return the index
+        """
+        for key, val in self.datastores.items():
+            if val is d:
+                idx = key
+                break
+        else:
+            idx = self.store(d, locked)
+        return idx
+
+    def release(self, idx):
+        """Discard a datastore in the collection"""
+        if idx in self.locked:
+            raise Exception('Tried to release locked datastore %d' % idx)
+        del self.datastores[idx]