From 780f555b2e36b0d468209e0ad741e8261faf63e5 Mon Sep 17 00:00:00 2001
From: Paul Sokolovsky <pfalcon@users.sourceforge.net>
Date: Wed, 1 Jan 2014 23:42:21 +0200
Subject: [PATCH] Add new alloc metric: peak_bytes_allocated.

This is just max value of current_bytes_allocated seen.
---
 py/malloc.c | 10 ++++++++++
 py/misc.h   |  1 +
 2 files changed, 11 insertions(+)

diff --git a/py/malloc.c b/py/malloc.c
index 13f0a8fc3e..a3736cde4d 100644
--- a/py/malloc.c
+++ b/py/malloc.c
@@ -5,6 +5,9 @@
 
 static int total_bytes_allocated = 0;
 static int current_bytes_allocated = 0;
+static int peak_bytes_allocated = 0;
+
+#define UPDATE_PEAK() { if (current_bytes_allocated > peak_bytes_allocated) peak_bytes_allocated = current_bytes_allocated; }
 
 void *m_malloc(int num_bytes) {
     if (num_bytes == 0) {
@@ -17,6 +20,7 @@ void *m_malloc(int num_bytes) {
     }
     total_bytes_allocated += num_bytes;
     current_bytes_allocated += num_bytes;
+    UPDATE_PEAK();
     return ptr;
 }
 
@@ -31,6 +35,7 @@ void *m_malloc0(int num_bytes) {
     }
     total_bytes_allocated += num_bytes;
     current_bytes_allocated += num_bytes;
+    UPDATE_PEAK();
     return ptr;
 }
 
@@ -52,6 +57,7 @@ void *m_realloc(void *ptr, int old_num_bytes, int new_num_bytes) {
     int diff = new_num_bytes - old_num_bytes;
     total_bytes_allocated += diff;
     current_bytes_allocated += diff;
+    UPDATE_PEAK();
     return ptr;
 }
 
@@ -69,3 +75,7 @@ int m_get_total_bytes_allocated(void) {
 int m_get_current_bytes_allocated(void) {
     return current_bytes_allocated;
 }
+
+int m_get_peak_bytes_allocated(void) {
+    return peak_bytes_allocated;
+}
diff --git a/py/misc.h b/py/misc.h
index 383d3986a7..153218ba2f 100644
--- a/py/misc.h
+++ b/py/misc.h
@@ -33,6 +33,7 @@ void m_free(void *ptr, int num_bytes);
 
 int m_get_total_bytes_allocated(void);
 int m_get_current_bytes_allocated(void);
+int m_get_peak_bytes_allocated(void);
 
 /** unichar / UTF-8 *********************************************/