/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/*  Fluent Bit
 *  ==========
 *  Copyright (C) 2015-2022 The Fluent Bit Authors
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

#include <Windows.h>
#include <stdlib.h>
#include <stdint.h>
#include <fcntl.h>
#include <io.h>
#include "interface.h"

/*
 * POSIX IO emulation tailored for in_tail's usage.
 *
 * open(2) that does not acquire an exclusive lock.
 */

int win32_open(const char *path, int flags)
{
    HANDLE h;
    h = CreateFileA(path,
                    GENERIC_READ,
                    FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE,
                    NULL,           /* lpSecurityAttributes */
                    OPEN_EXISTING,  /* dwCreationDisposition */
                    0,              /* dwFlagsAndAttributes */
                    NULL);          /* hTemplateFile */
    if (h == INVALID_HANDLE_VALUE) {
        return -1;
    }
    return _open_osfhandle((intptr_t) h, _O_RDONLY);
}