jdk

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/*
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 * Copyright (c) 2018, 2023, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#include "precompiled.hpp"
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#include "semaphore_windows.hpp"
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#include "utilities/debug.hpp"
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#include <windows.h>
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#include <errno.h>
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WindowsSemaphore::WindowsSemaphore(uint value) {
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  _semaphore = ::CreateSemaphore(nullptr, value, LONG_MAX, nullptr);
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  guarantee(_semaphore != nullptr, "CreateSemaphore failed with error code: %lu", GetLastError());
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}
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WindowsSemaphore::~WindowsSemaphore() {
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  ::CloseHandle(_semaphore);
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}
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void WindowsSemaphore::signal(uint count) {
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  if (count > 0) {
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    BOOL ret = ::ReleaseSemaphore(_semaphore, count, nullptr);
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    assert(ret != 0, "ReleaseSemaphore failed with error code: %lu", GetLastError());
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  }
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}
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void WindowsSemaphore::wait() {
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  DWORD ret = ::WaitForSingleObject(_semaphore, INFINITE);
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  assert(ret != WAIT_FAILED,   "WaitForSingleObject failed with error code: %lu", GetLastError());
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  assert(ret == WAIT_OBJECT_0, "WaitForSingleObject failed with return value: %lu", ret);
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}
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bool WindowsSemaphore::trywait() {
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  DWORD ret = ::WaitForSingleObject(_semaphore, 0);
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  assert(ret != WAIT_FAILED,   "WaitForSingleObject failed with error code: %lu", GetLastError());
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  return ret == WAIT_OBJECT_0;
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}
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