replace VS implementation of gettimeofday with std::chrono::steady_cl…

…ock::now(); fixes #2038

CMakeLists.txt

@@ -173,7 +173,6 @@ include_directories(src/dict)
 include_directories(src/lstm)
 include_directories(src/opencl)
 include_directories(src/textord)
-include_directories(src/vs2010/port)
 include_directories(src/viewer)
 include_directories(src/wordrec)
 
@@ -210,12 +209,6 @@ file(GLOB tesseract_hdr
     src/viewer/*.h
     src/wordrec/*.h
 )
-if (WIN32)
-    file(GLOB tesseract_win32_src "src/vs2010/port/*.cpp")
-    file(GLOB tesseract_win32_hdr "src/vs2010/port/*.h")
-    set(tesseract_src ${tesseract_src} ${tesseract_win32_src})
-    set(tesseract_hdr ${tesseract_hdr} ${tesseract_win32_hdr})
-endif()
 
 set(tesseract_src ${tesseract_src}
     src/api/baseapi.cpp

cmake/SourceGroups.cmake

@@ -34,5 +34,4 @@ source_group("lstm"         "${SSRC}/lstm/${H_CPP}")
 source_group("opencl"       "${SSRC}/opencl/${H_CPP}")
 source_group("textord"      "${SSRC}/textord/${H_CPP}")
 source_group("viewer"       "${SSRC}/viewer/${H_CPP}")
-source_group("port"         "${SSRC}/vs2010/port/${H_CPP}")
 source_group("wordrec"      "${SSRC}/wordrec/${H_CPP}")

cppan.yml

@@ -64,8 +64,6 @@ projects:
           - src/viewer/.*\.h
           - src/wordrec/.*\.h
 
-          - src/vs2010/port/.*
-
         exclude_from_build:
           - src/api/tesseractmain.cpp
           - src/viewer/svpaint.cpp
@@ -81,7 +79,6 @@ projects:
             - src/lstm
             - src/opencl
             - src/textord
-            - src/vs2010/port
             - src/viewer
             - src/wordrec
           #public:
@@ -140,8 +137,6 @@ projects:
                         ${SDIR}/src/arch/intsimdmatrixavx2.cpp
                         PROPERTIES COMPILE_FLAGS "/arch:AVX2")
                 endif()
-            else()
-                remove_src_dir(src/vs2010/port/*)
             endif()
 
         options:

src/ccutil/ocrclass.h

@@ -26,15 +26,8 @@
 
 #ifndef            CCUTIL_OCRCLASS_H_
 #define            CCUTIL_OCRCLASS_H_
-
-#ifndef __GNUC__
-#ifdef _WIN32
-#include          "gettimeofday.h"
-#endif
-#else
-#include          <sys/time.h>
-#endif
 #include          <ctime>
+#include          <chrono>
 #include          "host.h"
 
 /*Maximum lengths of various strings*/
@@ -130,7 +123,8 @@ class ETEXT_DESC {             // output header
   PROGRESS_FUNC progress_callback;  /// called whenever progress increases
   PROGRESS_FUNC2 progress_callback2;/// monitor-aware progress callback
   void* cancel_this;                /// this or other data for cancel
-  struct timeval end_time;          /// Time to stop. Expected to be set only
+  std::chrono::steady_clock::time_point  end_time;
+                                    /// Time to stop. Expected to be set only
                                     /// by call to set_deadline_msecs().
   EANYCODE_CHAR text[1];            /// character data
 
@@ -144,29 +138,25 @@ class ETEXT_DESC {             // output header
         progress_callback(nullptr),
         progress_callback2(&default_progress_func),
         cancel_this(nullptr) {
-    end_time.tv_sec = 0;
-    end_time.tv_usec = 0;
+    end_time = std::chrono::time_point<std::chrono::steady_clock,
+                                       std::chrono::milliseconds>();
   }
 
   // Sets the end time to be deadline_msecs milliseconds from now.
   void set_deadline_msecs(int32_t deadline_msecs) {
-    gettimeofday(&end_time, nullptr);
-    int32_t deadline_secs = deadline_msecs / 1000;
-    end_time.tv_sec += deadline_secs;
-    end_time.tv_usec += (deadline_msecs -  deadline_secs * 1000) * 1000;
-    if (end_time.tv_usec > 1000000) {
-      end_time.tv_usec -= 1000000;
-      ++end_time.tv_sec;
+    if (deadline_msecs > 0) {
+      end_time = std::chrono::steady_clock::now() +
+               std::chrono::milliseconds(deadline_msecs);
     }
   }
 
   // Returns false if we've not passed the end_time, or have not set a deadline.
   bool deadline_exceeded() const {
-    if (end_time.tv_sec == 0 && end_time.tv_usec == 0) return false;
-    struct timeval now;
-    gettimeofday(&now, nullptr);
-    return (now.tv_sec > end_time.tv_sec || (now.tv_sec == end_time.tv_sec &&
-                                             now.tv_usec > end_time.tv_usec));
+    if (end_time.time_since_epoch() ==
+        std::chrono::steady_clock::duration::zero())
+      return false;
+    auto now = std::chrono::steady_clock::now();
+    return (now > end_time);
   }
 
 private: