From 6463dcfb0779263d82b5f9cef7b957dd426cf2bd Mon Sep 17 00:00:00 2001
From: Douglas Gregor <doug.gregor@gmail.com>
Date: Tue, 29 Jan 2002 13:38:30 +0000
Subject: [PATCH] regex_timer.cpp:   - Head off some infinite looping on some
 platforms

[SVN r12550]
---
 example/timer/regex_timer.cpp | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/example/timer/regex_timer.cpp b/example/timer/regex_timer.cpp
index 280c6eaf..ee927571 100644
--- a/example/timer/regex_timer.cpp
+++ b/example/timer/regex_timer.cpp
@@ -188,6 +188,7 @@ int main(int argc, char**argv)
          regex_search(s2, sm, ex);
 
          // measure time interval for reg_expression<char>
+         int trials = 30;
          do{
             iters *= (tim > 0.001) ? (1.1/tim) : 100;
             t.restart();
@@ -196,7 +197,7 @@ int main(int argc, char**argv)
                result = regex_search(s2, sm, ex);
             }
             tim = t.elapsed();
-         }while((tim < t.elapsed_min() * 1000) || (tim < 1));
+         }while(((tim < t.elapsed_min() * 1000) || (tim < 1)) && trials--);
 
          cout << "regex time: " << (tim * 1000000 / iters) << "us" << endl;
          if(result)
@@ -258,6 +259,7 @@ int main(int argc, char**argv)
          // measure time interval for reg_expression<char> using a deque
          iters = 10;
          tim = 1.1;
+         trials = 30;
          // cache load:
          regex_search(ds.begin(), ds.end(), dm, ex);
          do{
@@ -268,7 +270,7 @@ int main(int argc, char**argv)
                result = regex_search(ds.begin(), ds.end(), dm, ex);
             }
             tim = t.elapsed();
-         }while((tim < t.elapsed_min() * 1000) || (tim < 1));
+         }while(((tim < t.elapsed_min() * 1000) || (tim < 1)) && trials--);
          cout << "regex time (search over std::deque<char>): " << (tim * 1000000 / iters) << "us" << endl;
 
          if(result)
@@ -295,6 +297,7 @@ int main(int argc, char**argv)
          // measure time interval for POSIX matcher:
          iters = 10;
          tim = 1.1;
+         trials = 30;
          // cache load:
          regexec(&r, s2.c_str(), nsubs, matches.get(), 0);
          do{
@@ -302,10 +305,11 @@ int main(int argc, char**argv)
             t.restart();
             for(i = 0; i < iters; ++i)
             {
+               std::cerr << "Iteration #" << i << "/" << iters << std::endl;
                result = regexec(&r, s2.c_str(), nsubs, matches.get(), 0);
             }
             tim = t.elapsed();
-         }while((tim < t.elapsed_min() * 1000) || (tim < 1));
+         }while(((tim < t.elapsed_min() * 1000) || (tim < 1)) && trials--);
          cout << "POSIX regexec time: " << (tim * 1000000 / iters) << "us" << endl;
 
          if(result == 0)