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authorEelco Dolstra <edolstra@gmail.com>2017-04-06T12·30+0200
committerEelco Dolstra <edolstra@gmail.com>2017-04-06T12·30+0200
commit256940fc48a6db950136fb0bc43590b701a3e857 (patch)
tree33ce2b1e13f0aba27d4046c5fa2364a758583520 /src/libutil/lru-cache.hh
parent8decb07c31581febab664bedde12c8bf1367279e (diff)
nix-daemon: Disable path info cache
This is useless because the client also caches path info, and can
cause problems for long-running clients like hydra-queue-runner
(i.e. it may return cached info about paths that have been
garbage-collected).
Diffstat (limited to 'src/libutil/lru-cache.hh')
-rw-r--r--src/libutil/lru-cache.hh8
1 files changed, 5 insertions, 3 deletions
diff --git a/src/libutil/lru-cache.hh b/src/libutil/lru-cache.hh
index 35983aa2c918..3cb5d50889d9 100644
--- a/src/libutil/lru-cache.hh
+++ b/src/libutil/lru-cache.hh
@@ -11,7 +11,7 @@ class LRUCache
 {
 private:
 
-    size_t maxSize;
+    size_t capacity;
 
     // Stupid wrapper to get around circular dependency between Data
     // and LRU.
@@ -27,14 +27,16 @@ private:
 
 public:
 
-    LRUCache(size_t maxSize) : maxSize(maxSize) { }
+    LRUCache(size_t capacity) : capacity(capacity) { }
 
     /* Insert or upsert an item in the cache. */
     void upsert(const Key & key, const Value & value)
     {
+        if (capacity == 0) return;
+
         erase(key);
 
-        if (data.size() >= maxSize) {
+        if (data.size() >= capacity) {
             /* Retire the oldest item. */
             auto oldest = lru.begin();
             data.erase(*oldest);