1 files changed, 98 insertions, 0 deletions
diff --git a/sandbox/src/win2k_threadpool.cc b/sandbox/src/win2k_threadpool.cc
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+++ b/sandbox/src/win2k_threadpool.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 "sandbox/src/win2k_threadpool.h"
+
+#include "base/logging.h"
+#include "sandbox/src/win_utils.h"
+
+namespace sandbox {
+
+bool Win2kThreadPool::RegisterWait(const void* client, HANDLE waitable_object,
+                                   CrossCallIPCCallback callback,
+                                   void* context) {
+  if (0 == client) {
+    return false;
+  }
+  HANDLE pool_object = NULL;
+  // create a wait for a kernel object, with no timeout
+  if (!::RegisterWaitForSingleObject(&pool_object, waitable_object, callback,
+                                     context, INFINITE, WT_EXECUTEDEFAULT)) {
+    return false;
+  }
+  PoolObject pool_obj = {client, pool_object};
+  AutoLock lock(&lock_);
+  pool_objects_.push_back(pool_obj);
+  return true;
+}
+
+bool Win2kThreadPool::UnRegisterWaits(void* cookie) {
+  if (0 == cookie) {
+    return false;
+  }
+  AutoLock lock(&lock_);
+  PoolObjects::iterator it;
+  for (it = pool_objects_.begin(); it != pool_objects_.end(); ++it) {
+    if (it->cookie == cookie) {
+      if (!::UnregisterWaitEx(it->wait, INVALID_HANDLE_VALUE))
+        return false;
+      it->cookie = 0;
+    }
+  }
+  return true;
+}
+
+size_t Win2kThreadPool::OutstandingWaits() {
+  size_t count =0;
+  AutoLock lock(&lock_);
+  PoolObjects::iterator it;
+  for (it = pool_objects_.begin(); it != pool_objects_.end(); ++it) {
+    if (it->cookie != 0) {
+      ++count;
+    }
+  }
+  return count;
+}
+
+Win2kThreadPool::~Win2kThreadPool() {
+  // time to close all the pool wait handles. This frees the thread pool so
+  // it can throttle down the number of 'ready' threads.
+  AutoLock lock(&lock_);
+  PoolObjects::iterator it;
+  for (it = pool_objects_.begin(); it != pool_objects_.end(); ++it) {
+    if (0 != it->cookie) {
+      if (FALSE == ::UnregisterWait(it->wait)) {
+        NOTREACHED();
+      }
+      it->cookie = 0;
+    }
+  }
+}
+
+}  // namespace sandbox