Remove usage of Locker/Unlocker where possible.

samples/lineprocessor.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 51 matching lines @@
  * and print converted lines to output itself. This a sample script:
 
 while (true) {
   var line = read_line();
   if (!line) {
     break;
   }
   var res = line + " | " + line;
   print(res);
 }
-
- *
- * When run with "-p" argument, the program starts V8 Debugger Agent and
- * allows remote debugger to attach and debug JavaScript code.
- *
- * Interesting aspects:
- * 1. Wait for remote debugger to attach
- * Normally the program compiles custom script and immediately runs it.
- * If programmer needs to debug script from the very beginning, he should
- * run this sample program with "--wait-for-connection" command line parameter.
- * This way V8 will suspend on the first statement and wait for
- * debugger to attach.
- *
- * 2. Unresponsive V8
- * V8 Debugger Agent holds a connection with remote debugger, but it does
- * respond only when V8 is running some script. In particular, when this program
- * is waiting for input, all requests from debugger get deferred until V8
- * is called again. See how "--callback" command-line parameter in this sample
- * fixes this issue.
  */
 
 enum MainCycleType {
   CycleInCpp,
   CycleInJs
 };
 
 const char* ToCString(const v8::String::Utf8Value& value);
 void ReportException(v8::Isolate* isolate, v8::TryCatch* handler);
 v8::Handle<v8::String> ReadFile(v8::Isolate* isolate, const char* name);
 v8::Handle<v8::String> ReadLine();
 
 void Print(const v8::FunctionCallbackInfo<v8::Value>& args);
 void ReadLine(const v8::FunctionCallbackInfo<v8::Value>& args);
 bool RunCppCycle(v8::Handle<v8::Script> script,
                  v8::Local<v8::Context> context,
                  bool report_exceptions);
 
 
 v8::Persistent<v8::Context> debug_message_context;
 
 int RunMain(int argc, char* argv[]) {
   v8::V8::SetFlagsFromCommandLine(&argc, argv, true);
   v8::Isolate* isolate = v8::Isolate::New();
   v8::Isolate::Scope isolate_scope(isolate);
-  v8::Locker locker(isolate);
   v8::HandleScope handle_scope(isolate);
 
   v8::Handle<v8::String> script_source;
   v8::Handle<v8::Value> script_name;
   int script_param_counter = 0;
 
   MainCycleType cycle_type = CycleInCpp;
 
   for (int i = 1; i < argc; i++) {
     const char* str = argv[i];
@@ skipping 90 matching lines @@
     // All is already done.
   }
   return 0;
 }
 
 
 bool RunCppCycle(v8::Handle<v8::Script> script,
                  v8::Local<v8::Context> context,
                  bool report_exceptions) {
   v8::Isolate* isolate = context->GetIsolate();
-  v8::Locker lock(isolate);
 
   v8::Handle<v8::String> fun_name =
       v8::String::NewFromUtf8(isolate, "ProcessLine");
   v8::Handle<v8::Value> process_val = context->Global()->Get(fun_name);
 
   // If there is no Process function, or if it is not a function,
   // bail out
   if (!process_val->IsFunction()) {
     printf("Error: Script does not declare 'ProcessLine' global function.\n");
     return 1;
@@ skipping 137 matching lines @@
   args.GetReturnValue().Set(ReadLine());
 }
 
 
 v8::Handle<v8::String> ReadLine() {
   const int kBufferSize = 1024 + 1;
   char buffer[kBufferSize];
 
   char* res;
   {
-    v8::Unlocker unlocker(v8::Isolate::GetCurrent());
     res = fgets(buffer, kBufferSize, stdin);
   }
   v8::Isolate* isolate = v8::Isolate::GetCurrent();
   if (res == NULL) {
     v8::Handle<v8::Primitive> t = v8::Undefined(isolate);
     return v8::Handle<v8::String>::Cast(t);
   }
   // Remove newline char
   for (char* pos = buffer; *pos != '\0'; pos++) {
     if (*pos == '\n') {
       *pos = '\0';
       break;
     }
   }
   return v8::String::NewFromUtf8(isolate, buffer);
 }