Remove preemption thread and API

src/d8.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1356 matching lines @@
       options.stress_deopt = false;
     } else if (strcmp(argv[i], "--shell") == 0) {
       options.interactive_shell = true;
       argv[i] = NULL;
     } else if (strcmp(argv[i], "--test") == 0) {
       options.test_shell = true;
       argv[i] = NULL;
     } else if (strcmp(argv[i], "--send-idle-notification") == 0) {
       options.send_idle_notification = true;
       argv[i] = NULL;
-    } else if (strcmp(argv[i], "--preemption") == 0) {
-#ifdef V8_SHARED
-      printf("D8 with shared library does not support multi-threading\n");
-      return false;
-#else
-      options.use_preemption = true;
-      argv[i] = NULL;
-#endif  // V8_SHARED
-    } else if (strcmp(argv[i], "--nopreemption") == 0) {
-#ifdef V8_SHARED
-      printf("D8 with shared library does not support multi-threading\n");
-      return false;
-#else
-      options.use_preemption = false;
-      argv[i] = NULL;
-#endif  // V8_SHARED
-    } else if (strcmp(argv[i], "--preemption-interval") == 0) {
-#ifdef V8_SHARED
-      printf("D8 with shared library does not support multi-threading\n");
-      return false;
-#else
-      if (++i < argc) {
-        argv[i-1] = NULL;
-        char* end = NULL;
-        options.preemption_interval = strtol(argv[i], &end, 10);  // NOLINT
-        if (options.preemption_interval <= 0
-            || *end != '\0'
-            || errno == ERANGE) {
-          printf("Invalid value for --preemption-interval '%s'\n", argv[i]);
-          return false;
-        }
-        argv[i] = NULL;
-      } else {
-        printf("Missing value for --preemption-interval\n");
-        return false;
-      }
-#endif  // V8_SHARED
     } else if (strcmp(argv[i], "-f") == 0) {
       // Ignore any -f flags for compatibility with other stand-alone
       // JavaScript engines.
       continue;
     } else if (strcmp(argv[i], "--isolate") == 0) {
 #ifdef V8_SHARED
       printf("D8 with shared library does not support multi-threading\n");
       return false;
 #endif  // V8_SHARED
       options.num_isolates++;
@@ skipping 118 matching lines @@
         options.isolate_sources[0].Execute(isolate);
       }
     }
     if (!options.last_run) {
       if (options.send_idle_notification) {
         const int kLongIdlePauseInMs = 1000;
         V8::ContextDisposedNotification();
         V8::IdleNotification(kLongIdlePauseInMs);
       }
     }
-
-#ifndef V8_SHARED
-    // Start preemption if threads have been created and preemption is enabled.
-    if (threads.length() > 0
-        && options.use_preemption) {
-      Locker::StartPreemption(isolate, options.preemption_interval);
-    }
-#endif  // V8_SHARED
   }
 
 #ifndef V8_SHARED
   for (int i = 1; i < options.num_isolates; ++i) {
     options.isolate_sources[i].WaitForThread();
   }
 
   for (int i = 0; i < threads.length(); i++) {
     i::Thread* thread = threads[i];
     thread->Join();
     delete thread;
   }
-
-  if (threads.length() > 0 && options.use_preemption) {
-    Locker lock(isolate);
-    Locker::StopPreemption(isolate);
-  }
 #endif  // V8_SHARED
   return 0;
 }
 
 
 #ifdef V8_SHARED
 static void SetStandaloneFlagsViaCommandLine() {
   int fake_argc = 2;
   char **fake_argv = new char*[2];
   fake_argv[0] = NULL;
@@ skipping 174 matching lines @@
 }
 
 }  // namespace v8
 
 
 #ifndef GOOGLE3
 int main(int argc, char* argv[]) {
   return v8::Shell::Main(argc, argv);
 }
 #endif