[PATCH 09/19] mspace: add mspace_malloc_stats_return

[Alon Levy]

---
 src/mspace.c |   33 +++++++++++++++++++++++++++------
 src/mspace.h |    5 ++++-
 2 files changed, 31 insertions(+), 7 deletions(-)

diff --git a/src/mspace.c b/src/mspace.c
index 17d976a..822aade 100644
--- a/src/mspace.c
+++ b/src/mspace.c
@@ -1479,7 +1479,8 @@ static struct mallinfo internal_mallinfo(mstate m) {
 }
 #endif /* !NO_MALLINFO */
 
-static void internal_malloc_stats(mstate m) {
+static void internal_malloc_stats(mstate m, size_t *ret_maxfp, size_t *ret_fp,
+                                  size_t *ret_used) {
   if (!PREACTION(m)) {
     size_t maxfp = 0;
     size_t fp = 0;
@@ -1503,9 +1504,21 @@ static void internal_malloc_stats(mstate m) {
       }
     }
 
-    PRINT((m->user_data, "max system bytes = %10lu\n", (unsigned long)(maxfp)));
-    PRINT((m->user_data, "system bytes     = %10lu\n", (unsigned long)(fp)));
-    PRINT((m->user_data, "in use bytes     = %10lu\n", (unsigned long)(used)));
+    if (ret_maxfp || ret_fp || ret_used) {
+        if (ret_maxfp) {
+            *ret_maxfp = maxfp;
+        }
+        if (ret_fp) {
+            *ret_fp = fp;
+        }
+        if (ret_used) {
+            *ret_used = used;
+        }
+    } else {
+        PRINT((m->user_data, "max system bytes = %10lu\n", (unsigned long)(maxfp)));
+        PRINT((m->user_data, "system bytes     = %10lu\n", (unsigned long)(fp)));
+        PRINT((m->user_data, "in use bytes     = %10lu\n", (unsigned long)(used)));
+    }
 
     POSTACTION(m);
   }
@@ -2389,16 +2402,24 @@ void* mspace_memalign(mspace msp, size_t alignment, size_t bytes) {
   return internal_memalign(ms, alignment, bytes);
 }
 
-void mspace_malloc_stats(mspace msp) {
+void mspace_malloc_stats_return(mspace msp, size_t *ret_maxfp, size_t *ret_fp,
+                                size_t *ret_used)
+{
+
   mstate ms = (mstate)msp;
   if (ok_magic(ms)) {
-    internal_malloc_stats(ms);
+    internal_malloc_stats(ms, ret_maxfp, ret_fp, ret_used);
   }
   else {
     USAGE_ERROR_ACTION(ms,ms);
   }
 }
 
+
+void mspace_malloc_stats(mspace msp) {
+    mspace_malloc_stats_return(msp, NULL, NULL, NULL);
+}
+
 size_t mspace_footprint(mspace msp) {
   size_t result;
   mstate ms = (mstate)msp;
diff --git a/src/mspace.h b/src/mspace.h
index 8f5ba83..46a6a56 100644
--- a/src/mspace.h
+++ b/src/mspace.h
@@ -131,9 +131,12 @@ struct mallinfo mspace_mallinfo(mspace msp);
 
 /*
   mspace_malloc_stats behaves as malloc_stats, but reports
-  properties of the given space.
+  properties of the given space. The return variant returns instead of
+  printing the three quantities, maxfp, fp, and used.
 */
 void mspace_malloc_stats(mspace msp);
+void mspace_malloc_stats_return(mspace msp, size_t *ret_maxfp, size_t *ret_fp,
+                                size_t *ret_used);
 
 /*
   mspace_trim behaves as malloc_trim, but
-- 
1.7.10.1