Add Process.runSync for running processe synchronously.

runtime/bin/process.h

 // 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.
 
 #ifndef BIN_PROCESS_H_
 #define BIN_PROCESS_H_
 
 #include "bin/builtin.h"
 #include "bin/thread.h"
 #include "platform/globals.h"
 
 
 namespace dart {
 namespace bin {
 
+class ProcessResult {
+ public:
+  ProcessResult()
+      : stdout_data_(NULL), stdout_length_(0),
+        stderr_data_(NULL), stderr_length_(0), exit_code_(0) {}
+
+  void SetStdoutData(uint8_t* buffer, intptr_t length) {
+    stdout_data_ = buffer;
+    stdout_length_ = length;
+  }
+
+  void SetStderrData(uint8_t* buffer, intptr_t length) {
+    stderr_data_ = buffer;
+    stderr_length_ = length;
+  }
+
+  void set_exit_code(intptr_t exit_code) { exit_code_ = exit_code; }
+
+  uint8_t* stdout_data() { return stdout_data_; }
+  intptr_t stdout_length() { return stdout_length_; }
+  uint8_t* stderr_data() { return stderr_data_; }
+  intptr_t stderr_length() { return stderr_length_; }
+  intptr_t exit_code() { return exit_code_; }
+
+ private:
+  uint8_t* stdout_data_;
+  intptr_t stdout_length_;
+  uint8_t* stderr_data_;
+  intptr_t stderr_length_;
+  intptr_t exit_code_;
+
+  DISALLOW_ALLOCATION();
+};
+
+
 class Process {
  public:
   // Start a new process providing access to stdin, stdout, stderr and
   // process exit streams.
   static int Start(const char* path,
                    char* arguments[],
                    intptr_t arguments_length,
                    const char* working_directory,
                    char* environment[],
                    intptr_t environment_length,
                    intptr_t* in,
                    intptr_t* out,
                    intptr_t* err,
                    intptr_t* id,
                    intptr_t* exit_handler,
                    char** os_error_message);
 
+  static bool Wait(intptr_t id,
+                   intptr_t in,
+                   intptr_t out,
+                   intptr_t err,
+                   intptr_t exit_handler,
+                   ProcessResult* result);
+
   // Kill a process with a given pid.
   static bool Kill(intptr_t id, int signal);
 
   // Terminate the exit code handler thread. Does not return before
   // the thread has terminated.
   static void TerminateExitCodeHandler();
 
   static int GlobalExitCode() {
     MutexLocker ml(global_exit_code_mutex_);
     return global_exit_code_;
@@ skipping 16 matching lines @@
   static dart::Mutex* global_exit_code_mutex_;
 
   DISALLOW_ALLOCATION();
   DISALLOW_IMPLICIT_CONSTRUCTORS(Process);
 };
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // BIN_PROCESS_H_