From 126cc8829c003d483839fd230f979e47dcf856ae Mon Sep 17 00:00:00 2001
From: "Matthias P. Braendli" <matthias.braendli@mpb.li>
Date: Sat, 5 Mar 2016 17:28:24 +0100
Subject: Replace platform specific simul:// by C++11 chrono

---
 src/dabOutput/dabOutput.h        |  4 +++-
 src/dabOutput/dabOutputSimul.cpp | 27 ++++++++++++---------------
 2 files changed, 15 insertions(+), 16 deletions(-)

diff --git a/src/dabOutput/dabOutput.h b/src/dabOutput/dabOutput.h
index 2c4d1ef..6756027 100644
--- a/src/dabOutput/dabOutput.h
+++ b/src/dabOutput/dabOutput.h
@@ -36,7 +36,9 @@
 #include <stdexcept>
 #include <signal.h>
 #include <vector>
+#include <chrono>
 #include <memory>
+
 #ifdef _WIN32
 #   include <io.h>
 #   ifdef __MINGW32__
@@ -305,7 +307,7 @@ class DabOutputSimul : public DabOutput
 #ifdef _WIN32
         DWORD startTime_;
 #else
-        struct timespec startTime_;
+        std::chrono::steady_clock::time_point startTime_;
 #endif
 };
 
diff --git a/src/dabOutput/dabOutputSimul.cpp b/src/dabOutput/dabOutputSimul.cpp
index 2317750..04ce536 100644
--- a/src/dabOutput/dabOutputSimul.cpp
+++ b/src/dabOutput/dabOutputSimul.cpp
@@ -28,6 +28,8 @@
 #include <cstdio>
 #include <fcntl.h>
 #include <limits.h>
+#include <chrono>
+#include <thread>
 #ifdef _WIN32
 #   include <io.h>
 #   ifdef __MINGW32__
@@ -49,7 +51,7 @@ int DabOutputSimul::Open(const char* name)
 #ifdef _WIN32
     startTime_ = GetTickCount();
 #else
-    clock_gettime(CLOCK_MONOTONIC, &startTime_);
+    startTime_ = std::chrono::steady_clock::now();
 #endif
 
     return 0;
@@ -57,11 +59,10 @@ int DabOutputSimul::Open(const char* name)
 
 int DabOutputSimul::Write(void* buffer, int size)
 {
+#ifdef _WIN32
     unsigned long current;
     unsigned long start;
     unsigned long waiting;
-
-#ifdef _WIN32
     current = GetTickCount();
     start = this->startTime_;
     if (current < start) {
@@ -75,20 +76,16 @@ int DabOutputSimul::Write(void* buffer, int size)
     }
     this->startTime_ += 24;
 #else
-    struct timespec curTime;
-    clock_gettime(CLOCK_MONOTONIC, &curTime);
-    current = (1000000000ul * curTime.tv_sec) + curTime.tv_nsec;
-    start = (1000000000ul * this->startTime_.tv_sec) + this->startTime_.tv_nsec;
-    waiting = 24000000ul - (current - start);
-    if ((current - start) < 24000000ul) {
-        usleep(waiting / 1000);
-    }
+    auto curTime = std::chrono::steady_clock::now();
+
+    auto diff = curTime - startTime_;
+    auto waiting = std::chrono::milliseconds(24) - diff;
 
-    this->startTime_.tv_nsec += 24000000;
-    if (this->startTime_.tv_nsec >= 1000000000) {
-        this->startTime_.tv_nsec -= 1000000000;
-        ++this->startTime_.tv_sec;
+    if (diff < std::chrono::milliseconds(24)) {
+            std::this_thread::sleep_for(waiting);
     }
+
+    startTime_ += std::chrono::milliseconds(24);
 #endif
 
     return size;
-- 
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