Squashed 'subtree/rabit/' changes from d4ec037..28ca7be

28ca7be add linear readme
ca4b20f add linear readme
1133628 add linear readme
6a11676 update docs
a607047 Update build.sh
2c1cfd8 complete yarn
4f28e32 change formater
2fbda81 fix stdin input
3258bcf checkin yarn master
67ebf81 allow setup from env variables
9b6bf57 fix hdfs
395d5c2 add make system
88ce767 refactor io, initial hdfs file access need test
19be870 chgs
a1bd3c6 Merge branch 'master' of ssh://github.com/tqchen/rabit
1a573f9 introduce input split
29476f1 fix timer issue

git-subtree-dir: subtree/rabit
git-subtree-split: 28ca7becbd

include/rabit/io.h

@@ -23,6 +23,8 @@ class ISeekStream: public IStream {
   virtual void Seek(size_t pos) = 0;
   /*! \brief tell the position of the stream */
   virtual size_t Tell(void) = 0;
+  /*! \return whether we are at end of file */
+  virtual bool AtEnd(void) const = 0;
 };
 
 /*! \brief fixed size memory buffer */
@@ -55,7 +57,9 @@ struct MemoryFixSizeBuffer : public ISeekStream {
   virtual size_t Tell(void) {
     return curr_ptr_;
   }
-
+  virtual bool AtEnd(void) const {
+    return curr_ptr_ == buffer_size_;
+  }
  private:
   /*! \brief in memory buffer */
   char *p_buffer_;
@@ -95,7 +99,9 @@ struct MemoryBufferStream : public ISeekStream {
   virtual size_t Tell(void) {
     return curr_ptr_;
   }
-
+  virtual bool AtEnd(void) const {
+    return curr_ptr_ == p_buffer_->length();
+  }
  private:
   /*! \brief in memory buffer */
   std::string *p_buffer_;

include/rabit/timer.h

@@ -3,9 +3,13 @@
  * \brief This file defines the utils for timing
  * \author Tianqi Chen, Nacho, Tianyi
  */
-#ifndef RABIT_TIMER_H
-#define RABIT_TIMER_H
+#ifndef RABIT_TIMER_H_
+#define RABIT_TIMER_H_
 #include <time.h>
+#ifdef __MACH__
+#include <mach/clock.h>
+#include <mach/mach.h>
+#endif
 #include "./utils.h"
 
 namespace rabit {
@@ -14,10 +18,19 @@ namespace utils {
  * \brief return time in seconds, not cross platform, avoid to use this in most places
  */
 inline double GetTime(void) {
+  #ifdef __MACH__ 
+  clock_serv_t cclock;
+  mach_timespec_t mts;
+  host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &cclock);
+  utils::Check(clock_get_time(cclock, &mts) == 0, "failed to get time");
+  mach_port_deallocate(mach_task_self(), cclock);
+  return static_cast<double>(mts.tv_sec) + static_cast<double>(mts.tv_nsec) * 1e-9;
+  #else
   timespec ts;
   utils::Check(clock_gettime(CLOCK_REALTIME, &ts) == 0, "failed to get time");
   return static_cast<double>(ts.tv_sec) + static_cast<double>(ts.tv_nsec) * 1e-9;
+  #endif
 }
-}
-}
-#endif
+}  // namespace utils
+}  // namespace rabit
+#endif  // RABIT_TIMER_H_