//===-- include/flang/Runtime/extensions.h ----------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

// These C-coded entry points with Fortran-mangled names implement legacy
// extensions that will eventually be implemented in Fortran.

#ifndef FORTRAN_RUNTIME_EXTENSIONS_H_
#define FORTRAN_RUNTIME_EXTENSIONS_H_

#include "flang/Runtime/entry-names.h"

#define FORTRAN_PROCEDURE_NAME(name) name##_

#include "flang/Runtime/entry-names.h"
#include <cstddef>
#include <cstdint>

#ifdef _WIN32
// UID and GID don't exist on Windows, these exist to avoid errors.
typedef std::uint32_t uid_t;
typedef std::uint32_t gid_t;
#else
#include "sys/types.h" //pid_t
#endif

extern "C" {

// CALL FLUSH(n) antedates the Fortran 2003 FLUSH statement.
void FORTRAN_PROCEDURE_NAME(flush)(const int &unit);

// GNU extension subroutine FDATE
void FORTRAN_PROCEDURE_NAME(fdate)(char *string, std::int64_t length);

void RTNAME(Free)(std::intptr_t ptr);

// GNU Fortran 77 compatibility function IARGC.
std::int32_t FORTRAN_PROCEDURE_NAME(iargc)();

// GNU Fortran 77 compatibility subroutine GETARG(N, ARG).
void FORTRAN_PROCEDURE_NAME(getarg)(
    std::int32_t &n, char *arg, std::int64_t length);

// Calls getgid()
gid_t RTNAME(GetGID)();

// Calls getuid()
uid_t RTNAME(GetUID)();

// GNU extension subroutine GETLOG(C).
void FORTRAN_PROCEDURE_NAME(getlog)(char *name, std::int64_t length);

std::intptr_t RTNAME(Malloc)(std::size_t size);

// GNU extension function STATUS = SIGNAL(number, handler)
std::int64_t RTNAME(Signal)(std::int64_t number, void (*handler)(int));

// GNU extension subroutine SLEEP(SECONDS)
void RTNAME(Sleep)(std::int64_t seconds);

// GNU extension function ACCESS(NAME, MODE)
// TODO: not supported on Windows
#ifndef _WIN32
std::int64_t FORTRAN_PROCEDURE_NAME(access)(const char *name,
    std::int64_t nameLength, const char *mode, std::int64_t modeLength);
#endif

} // extern "C"
#endif // FORTRAN_RUNTIME_EXTENSIONS_H_
