Create unistd.h

[asmertpc-cloud]

fix for windows

[matthewdouglas]

Hi,

Can you please clarify what it is that is being fixed for Windows? What parts of unistd.h are actually needed? I assume this is for AMD GPUs on Windows, is that right? Preferably dependencies like #1834 and #1835 would be included in the same PR; but ideally I would not want to add any more code than necessary.

[asmertpc-cloud]

Hi
Sorry, I'm not quite comfortable with Git yet.
You're right, it's for AMD GPUs running Windows.
I closed #1834 and #1835, but calling unistd.h needs to be done like this.

#ifndef _UNISTD_H
#define _UNISTD_H`

/* Checking that we're on Windows */
#if defined(_WIN32) || defined(_WIN64)

#include <io.h>
#include <process.h>
#include <direct.h>
#include <stdlib.h>

/* Access Constants (POSIX -> Windows) /
#define F_OK 0
#define X_OK 1 / В Windows реально нет проверки на исполнение через access */
#define W_OK 2
#define R_OK 4

/* Standard Descriptors */
#define STDIN_FILENO 0
#define STDOUT_FILENO 1
#define STDERR_FILENO 2

/*
Macros for functions.
We use host for HIP compatibility,
so the compiler knows where these functions are available.
*/
#ifdef __cplusplus
extern "C" {
#endif

#define access _access
#define chdir _chdir
#define close _close
#define dup _dup
#define dup2 _dup2
#define getpid _getpid
#define isatty _isatty
#define lseek _lseek
#define read _read
#define rmdir _rmdir
#define unlink _unlink
#define write _write

#ifdef _MSC_VER
/* MSVC doesn't have a sleep function; we use the Windows API. */
#ifndef NOMINMAX
#define NOMINMAX
#endif
#include <windows.h>
#define sleep(x) Sleep((x) * 1000)
#define usleep(x) Sleep((x) / 1000)
#endif

#ifdef __cplusplus
}
#endif

#else
/* If we're not on Windows, we just pass in the real unistd.h. */
#include <unistd.h>
#endif

#endif /* _UNISTD_H */

[Jason-123-cyber]

Ty

[rwfsmith]

Is it even using anything in unistd.h? I created a PR to build for AMD on Windows and I just have it ignore that include, which builds and runs successfully.