From fae86c38bca5c960462e53975314a0749db5d17d Mon Sep 17 00:00:00 2001
From: MarcoFalke <falke.marco@gmail.com>
Date: Fri, 21 Feb 2020 09:48:27 -0800
Subject: [PATCH] util: Remove unused MilliSleep

---
 build_msvc/bitcoin_config.h  |  6 -----
 configure.ac                 | 51 ------------------------------------
 src/test/scheduler_tests.cpp | 15 ++---------
 src/util/time.cpp            | 19 --------------
 src/util/time.h              |  2 --
 5 files changed, 2 insertions(+), 91 deletions(-)

diff --git a/build_msvc/bitcoin_config.h b/build_msvc/bitcoin_config.h
index 3178f2a3d8..47c0a5f407 100644
--- a/build_msvc/bitcoin_config.h
+++ b/build_msvc/bitcoin_config.h
@@ -258,12 +258,6 @@
 /* Define if the visibility attribute is supported. */
 #define HAVE_VISIBILITY_ATTRIBUTE 1
 
-/* Define this symbol if boost sleep works */
-/* #undef HAVE_WORKING_BOOST_SLEEP */
-
-/* Define this symbol if boost sleep_for works */
-#define HAVE_WORKING_BOOST_SLEEP_FOR 1
-
 /* Define to the sub-directory where libtool stores uninstalled libraries. */
 #define LT_OBJDIR ".libs/"
 
diff --git a/configure.ac b/configure.ac
index d0fcf48713..e757940c3e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1231,57 +1231,6 @@ AC_LINK_IFELSE([AC_LANG_PROGRAM([[
 LIBS="$TEMP_LIBS"
 CPPFLAGS="$TEMP_CPPFLAGS"
 
-dnl Boost >= 1.50 uses sleep_for rather than the now-deprecated sleep, however
-dnl it was broken from 1.50 to 1.52 when backed by nanosleep. Use sleep_for if
-dnl a working version is available, else fall back to sleep. sleep was removed
-dnl after 1.56.
-dnl If neither is available, abort.
-TEMP_LIBS="$LIBS"
-LIBS="$BOOST_LIBS $LIBS"
-TEMP_CPPFLAGS="$CPPFLAGS"
-CPPFLAGS="$CPPFLAGS $BOOST_CPPFLAGS"
-AC_LINK_IFELSE([AC_LANG_PROGRAM([[
-  #include <boost/thread/thread.hpp>
-  #include <boost/version.hpp>
-  ]],[[
-  #if BOOST_VERSION >= 105000 && (!defined(BOOST_HAS_NANOSLEEP) || BOOST_VERSION >= 105200)
-      boost::this_thread::sleep_for(boost::chrono::milliseconds(0));
-  #else
-   choke me
-  #endif
-  ]])],
-  [boost_sleep=yes;
-     AC_DEFINE(HAVE_WORKING_BOOST_SLEEP_FOR, 1, [Define this symbol if boost sleep_for works])],
-  [boost_sleep=no])
-LIBS="$TEMP_LIBS"
-CPPFLAGS="$TEMP_CPPFLAGS"
-
-if test x$boost_sleep != xyes; then
-TEMP_LIBS="$LIBS"
-LIBS="$BOOST_LIBS $LIBS"
-TEMP_CPPFLAGS="$CPPFLAGS"
-CPPFLAGS="$CPPFLAGS $BOOST_CPPFLAGS"
-AC_LINK_IFELSE([AC_LANG_PROGRAM([[
-  #include <boost/version.hpp>
-  #include <boost/thread.hpp>
-  #include <boost/date_time/posix_time/posix_time_types.hpp>
-  ]],[[
-  #if BOOST_VERSION <= 105600
-      boost::this_thread::sleep(boost::posix_time::milliseconds(0));
-  #else
-   choke me
-  #endif
-  ]])],
-  [boost_sleep=yes; AC_DEFINE(HAVE_WORKING_BOOST_SLEEP, 1, [Define this symbol if boost sleep works])],
-  [boost_sleep=no])
-LIBS="$TEMP_LIBS"
-CPPFLAGS="$TEMP_CPPFLAGS"
-fi
-
-if test x$boost_sleep != xyes; then
-  AC_MSG_ERROR(No working boost sleep implementation found.)
-fi
-
 fi
 
 if test x$use_pkgconfig = xyes; then
diff --git a/src/test/scheduler_tests.cpp b/src/test/scheduler_tests.cpp
index a6cb34cf28..058dd1deda 100644
--- a/src/test/scheduler_tests.cpp
+++ b/src/test/scheduler_tests.cpp
@@ -4,6 +4,7 @@
 
 #include <random.h>
 #include <scheduler.h>
+#include <util/time.h>
 
 #include <boost/thread.hpp>
 #include <boost/test/unit_test.hpp>
@@ -23,18 +24,6 @@ static void microTask(CScheduler& s, boost::mutex& mutex, int& counter, int delt
     }
 }
 
-static void MicroSleep(uint64_t n)
-{
-#if defined(HAVE_WORKING_BOOST_SLEEP_FOR)
-    boost::this_thread::sleep_for(boost::chrono::microseconds(n));
-#elif defined(HAVE_WORKING_BOOST_SLEEP)
-    boost::this_thread::sleep(boost::posix_time::microseconds(n));
-#else
-    //should never get here
-    #error missing boost sleep implementation
-#endif
-}
-
 BOOST_AUTO_TEST_CASE(manythreads)
 {
     // Stress test: hundreds of microsecond-scheduled tasks,
@@ -81,7 +70,7 @@ BOOST_AUTO_TEST_CASE(manythreads)
     for (int i = 0; i < 5; i++)
         microThreads.create_thread(std::bind(&CScheduler::serviceQueue, &microTasks));
 
-    MicroSleep(600);
+    UninterruptibleSleep(std::chrono::microseconds{600});
     now = boost::chrono::system_clock::now();
 
     // More threads and more tasks:
diff --git a/src/util/time.cpp b/src/util/time.cpp
index 5c1182850e..f6d0dd4da6 100644
--- a/src/util/time.cpp
+++ b/src/util/time.cpp
@@ -11,7 +11,6 @@
 
 #include <atomic>
 #include <boost/date_time/posix_time/posix_time.hpp>
-#include <boost/thread.hpp>
 #include <ctime>
 #include <thread>
 
@@ -76,24 +75,6 @@ int64_t GetSystemTimeInSeconds()
     return GetTimeMicros()/1000000;
 }
 
-void MilliSleep(int64_t n)
-{
-
-/**
- * Boost's sleep_for was uninterruptible when backed by nanosleep from 1.50
- * until fixed in 1.52. Use the deprecated sleep method for the broken case.
- * See: https://svn.boost.org/trac/boost/ticket/7238
- */
-#if defined(HAVE_WORKING_BOOST_SLEEP_FOR)
-    boost::this_thread::sleep_for(boost::chrono::milliseconds(n));
-#elif defined(HAVE_WORKING_BOOST_SLEEP)
-    boost::this_thread::sleep(boost::posix_time::milliseconds(n));
-#else
-//should never get here
-#error missing boost sleep implementation
-#endif
-}
-
 std::string FormatISO8601DateTime(int64_t nTime) {
     struct tm ts;
     time_t time_val = nTime;
diff --git a/src/util/time.h b/src/util/time.h
index 445ca3acb3..77de1e047d 100644
--- a/src/util/time.h
+++ b/src/util/time.h
@@ -38,8 +38,6 @@ void SetMockTime(int64_t nMockTimeIn);
 /** For testing */
 int64_t GetMockTime();
 
-void MilliSleep(int64_t n);
-
 /** Return system time (or mocked time, if set) */
 template <typename T>
 T GetTime();