Rename TARGET_OS_* to HOST_OS_*.

runtime/bin/utils_macos.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/globals.h"
-#if defined(TARGET_OS_MACOS)
+#if defined(HOST_OS_MACOS)
 
 #include <errno.h>           // NOLINT
 #include <mach/clock.h>      // NOLINT
 #include <mach/mach.h>       // NOLINT
 #include <mach/mach_time.h>  // NOLINT
 #include <netdb.h>           // NOLINT
-#if TARGET_OS_IOS
+#if HOST_OS_IOS
 #include <sys/sysctl.h>  // NOLINT
 #endif
 #include <sys/time.h>  // NOLINT
 #include <time.h>      // NOLINT
 
 #include "bin/utils.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
 
 namespace dart {
@@ skipping 93 matching lines @@
   kern_return_t kr = mach_timebase_info(&timebase_info);
   ASSERT(KERN_SUCCESS == kr);
 }
 
 
 int64_t TimerUtils::GetCurrentMonotonicMillis() {
   return GetCurrentMonotonicMicros() / 1000;
 }
 
 
-#if TARGET_OS_IOS
+#if HOST_OS_IOS
 static int64_t GetCurrentTimeMicros() {
   // gettimeofday has microsecond resolution.
   struct timeval tv;
   if (gettimeofday(&tv, NULL) < 0) {
     UNREACHABLE();
     return 0;
   }
   return (static_cast<int64_t>(tv.tv_sec) * 1000000) + tv.tv_usec;
 }
-#endif  // TARGET_OS_IOS
+#endif  // HOST_OS_IOS
 
 
 int64_t TimerUtils::GetCurrentMonotonicMicros() {
-#if TARGET_OS_IOS
+#if HOST_OS_IOS
   // On iOS mach_absolute_time stops while the device is sleeping. Instead use
   // now - KERN_BOOTTIME to get a time difference that is not impacted by clock
   // changes. KERN_BOOTTIME will be updated by the system whenever the system
   // clock change.
   struct timeval boottime;
   int mib[2] = {CTL_KERN, KERN_BOOTTIME};
   size_t size = sizeof(boottime);
   int kr = sysctl(mib, sizeof(mib) / sizeof(mib[0]), &boottime, &size, NULL, 0);
   ASSERT(KERN_SUCCESS == kr);
   int64_t now = GetCurrentTimeMicros();
   int64_t origin = boottime.tv_sec * kMicrosecondsPerSecond;
   origin += boottime.tv_usec;
   return now - origin;
 #else
   ASSERT(timebase_info.denom != 0);
   // timebase_info converts absolute time tick units into nanoseconds.  Convert
   // to microseconds.
   int64_t result = mach_absolute_time() / kNanosecondsPerMicrosecond;
   result *= timebase_info.numer;
   result /= timebase_info.denom;
   return result;
-#endif  // TARGET_OS_IOS
+#endif  // HOST_OS_IOS
 }
 
 
 void TimerUtils::Sleep(int64_t millis) {
   struct timespec req;  // requested.
   struct timespec rem;  // remainder.
   int64_t micros = millis * kMicrosecondsPerMillisecond;
   int64_t seconds = micros / kMicrosecondsPerSecond;
   micros = micros - seconds * kMicrosecondsPerSecond;
   int64_t nanos = micros * kNanosecondsPerMicrosecond;
   req.tv_sec = seconds;
   req.tv_nsec = nanos;
   while (true) {
     int r = nanosleep(&req, &rem);
     if (r == 0) {
       break;
     }
     // We should only ever see an interrupt error.
     ASSERT(errno == EINTR);
     // Copy remainder into requested and repeat.
     req = rem;
   }
 }
 
 }  // namespace bin
 }  // namespace dart
 
-#endif  // defined(TARGET_OS_MACOS)
+#endif  // defined(HOST_OS_MACOS)