From 6d4c752aa0aaf41d7e764dbd81708f343a38c650 Mon Sep 17 00:00:00 2001
From: Josh Blum
Date: Wed, 21 Nov 2012 20:15:06 -0800
Subject: guard against empty consumes

---
 lib/block_task.cpp                    | 1 +
 lib/gras_impl/input_buffer_queues.hpp | 1 +
 2 files changed, 2 insertions(+)

diff --git a/lib/block_task.cpp b/lib/block_task.cpp
index 1a6c447..a0d4ba8 100644
--- a/lib/block_task.cpp
+++ b/lib/block_task.cpp
@@ -229,6 +229,7 @@ void BlockActor::handle_task(void)
 
 void BlockActor::consume(const size_t i, const size_t items)
 {
+    if (items == 0) return;
     this->items_consumed[i] += items;
     const size_t bytes = items*this->input_items_sizes[i];
     this->input_queues.consume(i, bytes);
diff --git a/lib/gras_impl/input_buffer_queues.hpp b/lib/gras_impl/input_buffer_queues.hpp
index f2738ee..5ae8951 100644
--- a/lib/gras_impl/input_buffer_queues.hpp
+++ b/lib/gras_impl/input_buffer_queues.hpp
@@ -225,6 +225,7 @@ GRAS_FORCE_INLINE void InputBufferQueues::accumulate(const size_t i, const size_
 
 GRAS_FORCE_INLINE void InputBufferQueues::consume(const size_t i, const size_t bytes_consumed)
 {
+    ASSERT(not _queues[i].empty());
     SBuffer &front = _queues[i].front();
 
     //assert that we dont consume past the bounds of the buffer
-- 
cgit