From 114b5812f6283f2325fc31e186b26c6d76f9551a Mon Sep 17 00:00:00 2001
From: Pieter Wuille <pieter.wuille@gmail.com>
Date: Thu, 29 Oct 2015 07:11:24 +0100
Subject: Prevector type

---
 src/memusage.h | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

(limited to 'src/memusage.h')

diff --git a/src/memusage.h b/src/memusage.h
index e96c5bf038..49760e64c7 100644
--- a/src/memusage.h
+++ b/src/memusage.h
@@ -46,7 +46,9 @@ template<typename X> static inline size_t DynamicUsage(const X * const &v) { ret
 static inline size_t MallocUsage(size_t alloc)
 {
     // Measured on libc6 2.19 on Linux.
-    if (sizeof(void*) == 8) {
+    if (alloc == 0) {
+        return 0;
+    } else if (sizeof(void*) == 8) {
         return ((alloc + 31) >> 4) << 4;
     } else if (sizeof(void*) == 4) {
         return ((alloc + 15) >> 3) << 3;
@@ -74,6 +76,12 @@ static inline size_t DynamicUsage(const std::vector<X>& v)
     return MallocUsage(v.capacity() * sizeof(X));
 }
 
+template<unsigned int N, typename X, typename S, typename D>
+static inline size_t DynamicUsage(const prevector<N, X, S, D>& v)
+{
+    return MallocUsage(v.allocated_memory());
+}
+
 template<typename X, typename Y>
 static inline size_t DynamicUsage(const std::set<X, Y>& s)
 {
-- 
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