From 5d18bbcf93e4c6d7fc065f98d5908d7478647209 Mon Sep 17 00:00:00 2001
From: Jens Alfke <jens@couchbase.com>
Date: Fri, 1 Apr 2016 17:16:08 -0400
Subject: [PATCH] Made Database::compact not fail when there's an auto-compact
 in progress

For couchbase/couchbase-lite-ios#1192
---
 CBForest/Database.cc | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/CBForest/Database.cc b/CBForest/Database.cc
index aff40ef..fd0e1fe 100644
--- a/CBForest/Database.cc
+++ b/CBForest/Database.cc
@@ -17,6 +17,7 @@
 #include "Document.hh"
 #include "LogInternal.hh"
 #include "atomic.h"           // forestdb internal
+#include "time_utils.h"       // forestdb internal
 #include <errno.h>
 #include <stdarg.h>           // va_start, va_end
 #include <stdio.h>
@@ -340,7 +341,14 @@ namespace cbforest {
     static atomic_uint32_t sCompactCount;
 
     void Database::compact() {
-        check(fdb_compact(_fileHandle, NULL));
+        auto status = fdb_compact(_fileHandle, NULL);
+        if (status == FDB_RESULT_FILE_IS_BUSY) {
+            // This result means there is already a background auto-compact in progress.
+            while (isCompacting())
+                ::usleep(100 * 1000);
+        } else {
+            check(status);
+        }
     }
 
     // static