Add a front() accessor to GrAllocator

Bug: skia:
Change-Id: If0bde2ddfe2dd1d84b27f4516076acc1b68daa40
Reviewed-on: https://skia-review.googlesource.com/133461
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>

1 files changed, 32 insertions, 0 deletions

diff --git a/src/gpu/GrAllocator.h b/src/gpu/GrAllocator.h
index e5d2f4ea61..314e58a99a 100644
--- a/src/gpu/GrAllocator.h
+++ b/src/gpu/GrAllocator.h
@@ -110,6 +110,24 @@ public:
     bool empty() const { return 0 == fCount; }
 
     /**
+     * Access first item, only call if count() != 0
+     */
+    void* front() {
+        SkASSERT(fCount);
+        SkASSERT(fInsertionIndexInBlock > 0);
+        return (char*)(fBlocks.front());
+    }
+
+    /**
+     * Access first item, only call if count() != 0
+     */
+    const void* front() const {
+        SkASSERT(fCount);
+        SkASSERT(fInsertionIndexInBlock > 0);
+        return (const char*)(fBlocks.front());
+    }
+
+    /**
      * Access last item, only call if count() != 0
      */
     void* back() {
@@ -297,6 +315,20 @@ public:
     bool empty() const { return fAllocator.empty(); }
 
     /**
+     * Access first item, only call if count() != 0
+     */
+    T& front() {
+        return *(T*)fAllocator.front();
+    }
+
+    /**
+     * Access first item, only call if count() != 0
+     */
+    const T& front() const {
+        return *(T*)fAllocator.front();
+    }
+
+    /**
      * Access last item, only call if count() != 0
      */
     T& back() {