commit c8154bde8758d1ffdd0ffdbdeac7ac9daa1a09ff
author Shinichiro Hamaji <shinichiro.hamaji@gmail.com> Tue Jan 26 17:43:19 2016 +0900
committer Shinichiro Hamaji <shinichiro.hamaji@gmail.com> Tue Jan 26 17:43:19 2016 +0900
tree 2a3e62f8f5eb56f4563242fab0d091f86aca2d55
parent 12f41b62362fa5ef185b3a90da96918ae3b88428

[C++] Fix a race in stats.cc

stats.cc

diff --git a/stats.cc b/stats.cc
index ec11e7f..ec509d8 100644
--- a/stats.cc
+++ b/stats.cc
@@ -27,6 +27,7 @@
 
 namespace {
 
+mutex g_mu;
 vector<Stats*>* g_stats;
 DEFINE_THREAD_LOCAL(double, g_start_time);
 
@@ -34,6 +35,7 @@
 
 Stats::Stats(const char* name)
     : name_(name), elapsed_(0), cnt_(0) {
+  unique_lock<mutex> lock(g_mu);
   if (g_stats == NULL)
     g_stats = new vector<Stats*>;
   g_stats->push_back(this);