From 582c687b4ca18899e811dfbad3075d5b2a2c46df Mon Sep 17 00:00:00 2001
From: vjpai <vpai@google.com>
Date: Mon, 27 Jul 2015 16:39:28 -0700
Subject: [PATCH] Remove use of C++11 randomization engines
---
test/cpp/qps/interarrival.h | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/test/cpp/qps/interarrival.h b/test/cpp/qps/interarrival.h
index f90a17a894..a4fecb7bab 100644
--- a/test/cpp/qps/interarrival.h
+++ b/test/cpp/qps/interarrival.h
@@ -36,7 +36,8 @@
#include <chrono>
#include <cmath>
-#include <random>
+#include <cstdlib>
+#include <vector>
#include <grpc++/config.h>
@@ -141,17 +142,16 @@ class ParetoDist GRPC_FINAL : public RandomDist {
// in an efficient re-entrant way. The random table is built at construction
// time, and each call must include the thread id of the invoker
-typedef std::default_random_engine qps_random_engine;
-
class InterarrivalTimer {
public:
InterarrivalTimer() {}
void init(const RandomDist& r, int threads, int entries = 1000000) {
- qps_random_engine gen;
- std::uniform_real_distribution<double> uniform(0.0, 1.0);
for (int i = 0; i < entries; i++) {
+ // rand is the only choice that is portable across POSIX and Windows
+ // and that supports new and old compilers
+ double uniform_0_1 = rand() / RAND_MAX;
random_table_.push_back(std::chrono::nanoseconds(
- static_cast<int64_t>(1e9 * r(uniform(gen)))));
+ static_cast<int64_t>(1e9 * r(uniform_0_1))));
}
// Now set up the thread positions
for (int i = 0; i < threads; i++) {
--
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