1 files changed, 123 insertions, 0 deletions
diff --git a/src/mongo/db/exec/working_set_common.cpp b/src/mongo/db/exec/working_set_common.cpp
new file mode 100644
index 00000000000..8b9e07a974c
--- /dev/null
+++ b/src/mongo/db/exec/working_set_common.cpp
@@ -0,0 +1,123 @@
+/**
+ *    Copyright (C) 2013 10gen Inc.
+ *
+ *    This program is free software: you can redistribute it and/or  modify
+ *    it under the terms of the GNU Affero General Public License, version 3,
+ *    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 Affero General Public License for more details.
+ *
+ *    You should have received a copy of the GNU Affero General Public License
+ *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ *    As a special exception, the copyright holders give permission to link the
+ *    code of portions of this program with the OpenSSL library under certain
+ *    conditions as described in each individual source file and distribute
+ *    linked combinations including the program with the OpenSSL library. You
+ *    must comply with the GNU Affero General Public License in all respects for
+ *    all of the code used other than as permitted herein. If you modify file(s)
+ *    with this exception, you may extend this exception to your version of the
+ *    file(s), but you are not obligated to do so. If you do not wish to do so,
+ *    delete this exception statement from your version. If you delete this
+ *    exception statement from all source files in the program, then also delete
+ *    it in the license file.
+ */
+
+#include "mongo/db/exec/working_set.h"
+#include "mongo/db/exec/working_set_common.h"
+#include "mongo/db/pdfile.h"
+
+namespace mongo {
+
+    // static
+    bool WorkingSetCommon::fetchAndInvalidateLoc(WorkingSetMember* member) {
+        // Already in our desired state.
+        if (member->state == WorkingSetMember::OWNED_OBJ) { return true; }
+
+        // We can't do anything without a DiskLoc.
+        if (!member->hasLoc()) { return false; }
+
+        // Do the fetch, invalidate the DL.
+        member->obj = member->loc.obj().getOwned();
+
+        member->state = WorkingSetMember::OWNED_OBJ;
+        member->loc = DiskLoc();
+        return true;
+    }
+
+    // static
+    void WorkingSetCommon::initFrom(WorkingSetMember* dest, const WorkingSetMember& src) {
+        dest->loc = src.loc;
+        dest->obj = src.obj;
+        dest->keyData = src.keyData;
+        dest->state = src.state;
+
+        // Merge computed data.
+        typedef WorkingSetComputedDataType WSCD;
+        for (WSCD i = WSCD(0); i < WSM_COMPUTED_NUM_TYPES; i = WSCD(i + 1)) {
+            if (src.hasComputed(i)) {
+                dest->addComputed(src.getComputed(i)->clone());
+            }
+        }
+    }
+
+    // static
+    WorkingSetID WorkingSetCommon::allocateStatusMember(WorkingSet* ws, const Status& status) {
+        invariant(ws);
+
+        BSONObjBuilder bob;
+        bob.append("ok", status.isOK() ? 1.0 : 0.0);
+        bob.append("code", status.code());
+        bob.append("errmsg", status.reason());
+
+        WorkingSetID wsid = ws->allocate();
+        WorkingSetMember* member = ws->get(wsid);
+        member->state = WorkingSetMember::OWNED_OBJ;
+        member->obj = bob.obj();
+
+        return wsid;
+    }
+
+    // static
+    bool WorkingSetCommon::isValidStatusMemberObject(const BSONObj& obj) {
+        return obj.nFields() == 3 &&
+               obj.hasField("ok") &&
+               obj.hasField("code") &&
+               obj.hasField("errmsg");
+    }
+
+    // static
+    void WorkingSetCommon::getStatusMemberObject(const WorkingSet& ws, WorkingSetID wsid,
+                                                 BSONObj* objOut) {
+        invariant(objOut);
+
+        // Validate ID and working set member.
+        if (WorkingSet::INVALID_ID == wsid) {
+            return;
+        }
+        WorkingSetMember* member = ws.get(wsid);
+        if (!member->hasOwnedObj()) {
+            return;
+        }
+        BSONObj obj = member->obj;
+        if (!isValidStatusMemberObject(obj)) {
+            return;
+        }
+        *objOut = member->obj;
+    }
+
+    // static
+    std::string WorkingSetCommon::toStatusString(const BSONObj& obj) {
+        if (!isValidStatusMemberObject(obj)) {
+            Status unknownStatus(ErrorCodes::UnknownError, "no details available");
+            return unknownStatus.toString();
+        }
+        Status status(ErrorCodes::fromInt(obj.getIntField("code")),
+                      obj.getStringField("errmsg"));
+        return status.toString();
+    }
+
+}  // namespace mongo