Add chrome to the repository.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@15 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 118 insertions, 0 deletions

diff --git a/chrome/common/process_watcher.cc b/chrome/common/process_watcher.cc
new file mode 100644
index 0000000..5163fbd
--- /dev/null
+++ b/chrome/common/process_watcher.cc
@@ -0,0 +1,118 @@
+// Copyright 2008, Google Inc.
+// 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 with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "chrome/common/process_watcher.h"
+
+#include "base/message_loop.h"
+#include "chrome/app/result_codes.h"
+#include "chrome/common/env_util.h"
+#include "chrome/common/env_vars.h"
+
+// Maximum amount of time (in milliseconds) to wait for the process to exit.
+static const int kWaitInterval = 2000;
+
+namespace {
+
+class TimerExpiredTask : public Task, public MessageLoop::Watcher {
+ public:
+  explicit TimerExpiredTask(ProcessHandle process) : process_(process) {
+    MessageLoop::current()->WatchObject(process_, this);
+  }
+
+  virtual ~TimerExpiredTask() {
+    if (process_) {
+      KillProcess();
+      DCHECK(!process_) << "Make sure to close the handle.";
+    }
+  }
+
+  // Task ---------------------------------------------------------------------
+
+  virtual void Run() {
+    if (process_)
+      KillProcess();
+  }
+
+  // MessageLoop::Watcher -----------------------------------------------------
+
+  virtual void OnObjectSignaled(HANDLE object) {
+    if (MessageLoop::current()) {
+      // When we're called from our destructor, the message loop is in the
+      // process of being torn down.  Only touch the message loop if it is
+      // still running.
+      MessageLoop::current()->WatchObject(process_, NULL);  // Stop watching.
+    }
+
+    CloseHandle(process_);
+    process_ = NULL;
+  }
+
+ private:
+  void KillProcess() {
+    if (env_util::HasEnvironmentVariable(env_vars::kHeadless)) {
+     // If running the distributed tests, give the renderer a little time to figure out
+     // that the channel is shutdown and unwind.
+     if (WaitForSingleObject(process_, kWaitInterval) == WAIT_OBJECT_0) {
+       OnObjectSignaled(process_);
+       return;
+     }
+    }
+
+    // OK, time to get frisky.  We don't actually care when the process
+    // terminates.  We just care that it eventually terminates, and that's what
+    // TerminateProcess should do for us. Don't check for the result code since
+    // it fails quite often. This should be investigated eventually.
+    TerminateProcess(process_, ResultCodes::HUNG);
+
+    // Now, just cleanup as if the process exited normally.
+    OnObjectSignaled(process_);
+  }
+
+  // The process that we are watching.
+  ProcessHandle process_;
+
+  DISALLOW_EVIL_CONSTRUCTORS(TimerExpiredTask);
+};
+
+}  // namespace
+
+// static
+void ProcessWatcher::EnsureProcessTerminated(ProcessHandle process) {
+  DCHECK(process != GetCurrentProcess());
+
+  // If already signaled, then we are done!
+  if (WaitForSingleObject(process, 0) == WAIT_OBJECT_0) {
+    CloseHandle(process);
+    return;
+  }
+
+  MessageLoop::current()->PostDelayedTask(FROM_HERE,
+                                          new TimerExpiredTask(process),
+                                          kWaitInterval);
+}