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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
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