Add base to the repository.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@8 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 104 insertions, 0 deletions

diff --git a/base/shared_event.cc b/base/shared_event.cc
new file mode 100644
index 0000000..e0870cf
--- /dev/null
+++ b/base/shared_event.cc
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+// 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 "base/shared_event.h"
+#include "base/logging.h"
+#include "base/time.h"
+
+SharedEvent::~SharedEvent() {
+  Close();
+}
+
+bool SharedEvent::Create(bool manual_reset, bool initial_state) {
+  DCHECK(!event_handle_);
+  event_handle_ = CreateEvent(NULL /* security attributes */, manual_reset,
+                              initial_state, NULL /* name */);
+  DCHECK(event_handle_);
+  return !!event_handle_;
+}
+
+void SharedEvent::Close() {
+  if (event_handle_) {
+    BOOL rv = CloseHandle(event_handle_);
+    DCHECK(rv);
+    event_handle_ = NULL;
+  }
+}
+
+bool SharedEvent::SetSignaledState(bool signaled) {
+  DCHECK(event_handle_);
+  BOOL rv;
+  if (signaled) {
+    rv = SetEvent(event_handle_);
+  } else {
+    rv = ResetEvent(event_handle_);
+  }
+  return rv ? true : false;
+}
+
+bool SharedEvent::IsSignaled() {
+  DCHECK(event_handle_);
+  DWORD event_state = ::WaitForSingleObject(event_handle_, 0);
+  DCHECK(WAIT_OBJECT_0 == event_state || WAIT_TIMEOUT == event_state);
+  return event_state == WAIT_OBJECT_0;
+}
+
+bool SharedEvent::WaitUntilSignaled(const TimeDelta& timeout) {
+  DCHECK(event_handle_);
+  DWORD event_state = ::WaitForSingleObject(event_handle_,
+      static_cast<DWORD>(timeout.InMillisecondsF()));
+  return event_state == WAIT_OBJECT_0;
+}
+
+bool SharedEvent::WaitForeverUntilSignaled() {
+  DCHECK(event_handle_);
+  DWORD event_state = ::WaitForSingleObject(event_handle_,
+                                            INFINITE);
+  return event_state == WAIT_OBJECT_0;
+}
+
+bool SharedEvent::ShareToProcess(ProcessHandle process,
+                                 SharedEventHandle *new_handle) {
+  DCHECK(event_handle_);
+  HANDLE event_handle_copy;
+  BOOL rv = DuplicateHandle(GetCurrentProcess(), event_handle_, process,
+      &event_handle_copy, 0, FALSE, DUPLICATE_SAME_ACCESS);
+
+  if (rv)
+    *new_handle = event_handle_copy;
+  return rv ? true : false;
+}
+
+bool SharedEvent::GiveToProcess(ProcessHandle process,
+                                SharedEventHandle *new_handle) {
+  bool rv = ShareToProcess(process, new_handle);
+  if (rv)
+    Close();
+  return rv;
+}