Prepare to enable explicit gpu resource allocation (take 2)

Change-Id: I3fd78d53e8bea84c0217b9fe6e180eaa9e4ac753
Reviewed-on: https://skia-review.googlesource.com/68920
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>

1 files changed, 37 insertions, 14 deletions

diff --git a/src/core/SkTMultiMap.h b/src/core/SkTMultiMap.h
index 3d6e38e454..987a306661 100644
--- a/src/core/SkTMultiMap.h
+++ b/src/core/SkTMultiMap.h
@@ -34,6 +34,7 @@ public:
         for ( ; !iter.done(); ++iter) {
             ValueList* next;
             for (ValueList* cur = &(*iter); cur; cur = next) {
+                HashTraits::OnFree(cur->fValue);
                 next = cur->fNext;
                 delete cur;
             }
@@ -69,20 +70,7 @@ public:
             list = list->fNext;
         }
 
-        if (list->fNext) {
-            ValueList* next = list->fNext;
-            list->fValue = next->fValue;
-            list->fNext = next->fNext;
-            delete next;
-        } else if (prev) {
-            prev->fNext = nullptr;
-            delete list;
-        } else {
-            fHash.remove(key);
-            delete list;
-        }
-
-        --fCount;
+        this->internalRemove(prev, list, key);
     }
 
     T* find(const Key& key) const {
@@ -105,6 +93,23 @@ public:
         return nullptr;
     }
 
+    template<class FindPredicate>
+    T* findAndRemove(const Key& key, const FindPredicate f) {
+        ValueList* list = fHash.find(key);
+
+        ValueList* prev = nullptr;
+        while (list) {
+            if (f(list->fValue)){
+                T* value = list->fValue;
+                this->internalRemove(prev, list, key);
+                return value;
+            }
+            prev = list;
+            list = list->fNext;
+        }
+        return nullptr;
+    }
+
     int count() const { return fCount; }
 
 #ifdef SK_DEBUG
@@ -168,6 +173,24 @@ public:
 private:
     SkTDynamicHash<ValueList, Key> fHash;
     int fCount;
+
+    void internalRemove(ValueList* prev, ValueList* elem, const Key& key) {
+        if (elem->fNext) {
+            ValueList* next = elem->fNext;
+            elem->fValue = next->fValue;
+            elem->fNext = next->fNext;
+            delete next;
+        } else if (prev) {
+            prev->fNext = nullptr;
+            delete elem;
+        } else {
+            fHash.remove(key);
+            delete elem;
+        }
+
+        --fCount;
+    }
+
 };
 
 #endif