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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "sandbox/win/src/threadpool.h"
#include <stddef.h>
#include "sandbox/win/src/win_utils.h"
namespace sandbox {
ThreadPool::ThreadPool() {
::InitializeCriticalSection(&lock_);
}
bool ThreadPool::RegisterWait(const void* cookie,
HANDLE waitable_object,
CrossCallIPCCallback callback,
void* context) {
if (0 == cookie) {
return false;
}
HANDLE pool_object = nullptr;
// 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 = {cookie, pool_object};
AutoLock lock(&lock_);
pool_objects_.push_back(pool_obj);
return true;
}
bool ThreadPool::UnRegisterWaits(void* cookie) {
if (0 == cookie) {
return false;
}
std::vector<HANDLE> finished_waits;
{
AutoLock lock(&lock_);
PoolObjects::iterator it = pool_objects_.begin();
while (it != pool_objects_.end()) {
if (it->cookie == cookie) {
HANDLE wait = it->wait;
it = pool_objects_.erase(it);
finished_waits.push_back(wait);
} else {
++it;
}
}
}
bool success = true;
for (HANDLE wait : finished_waits) {
success &= (::UnregisterWaitEx(wait, INVALID_HANDLE_VALUE) != 0);
}
return success;
}
size_t ThreadPool::OutstandingWaits() {
AutoLock lock(&lock_);
return pool_objects_.size();
}
ThreadPool::~ThreadPool() {
// Here we used to unregister all the pool wait handles. Now, following the
// rest of the code we avoid lengthy or blocking calls given that the process
// is being torn down.
::DeleteCriticalSection(&lock_);
}
} // namespace sandbox
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