-#ifndef _UNISTD_H
/*
- * This file is part of the Mingw32 package.
+ * unistd.h
+ *
+ * Standard header file declaring MinGW's POSIX compatibility features.
+ *
+ * $Id$
+ *
+ * Written by Rob Savoye <rob@cygnus.com>
+ * Modified by Earnie Boyd <earnie@users.sourceforge.net>
+ * Danny Smith <dannysmith@users.sourceforge.net>
+ * Ramiro Polla <ramiro@lisha.ufsc.br>
+ * Gregory McGarry <gregorymcgarry@users.sourceforge.net>
+ * Keith Marshall <keithmarshall@users.sourceforge.net>
+ * Copyright (C) 1997, 1999, 2002-2004, 2007-2009, 2014-2016,
+ * MinGW.org Project.
+ *
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice, this permission notice, and the following
+ * disclaimer shall be included in all copies or substantial portions of
+ * the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OF OR OTHER
+ * DEALINGS IN THE SOFTWARE.
*
- * unistd.h maps (roughly) to io.h
- * Other headers included by unistd.h may be selectively processed;
+ */
+#ifndef _UNISTD_H
+#define _UNISTD_H 1
+#pragma GCC system_header
+
+/* All MinGW headers MUST include _mingw.h before anything else,
+ * to ensure proper initialization of feature test macros.
+ */
+#include <_mingw.h>
+
+/* unistd.h maps (roughly) to Microsoft's <io.h>
+ * Other headers included by <unistd.h> may be selectively processed;
* __UNISTD_H_SOURCED__ enables such selective processing.
*/
-#define _UNISTD_H
#define __UNISTD_H_SOURCED__ 1
#include <io.h>
#include <process.h>
#include <getopt.h>
-/* These are also defined in stdio.h. */
-#ifndef SEEK_SET
-#define SEEK_SET 0
-#endif
+/* These are defined in stdio.h. POSIX also requires that they
+ * are to be consistently defined here; don't guard against prior
+ * definitions, as this might conceal inconsistencies.
+ */
+#define SEEK_SET 0
+#define SEEK_CUR 1
+#define SEEK_END 2
-#ifndef SEEK_CUR
-#define SEEK_CUR 1
-#endif
+#if _POSIX_C_SOURCE
+/* POSIX process/thread suspension functions; all are supported by a
+ * common MinGW API in libmingwex.a, providing for suspension periods
+ * ranging from mean values of ~7.5 milliseconds, (see the comments in
+ * <time.h>), extending up to a maximum of ~136 years.
+ *
+ * Note that, whereas POSIX supports early wake-up of any suspended
+ * process/thread, in response to a signal, this implementation makes
+ * no attempt to emulate this signalling behaviour, (since signals are
+ * not well supported by Windows); thus, unless impeded by an invalid
+ * argument, this implementation always returns an indication as if
+ * the sleeping period ran to completion.
+ */
+_BEGIN_C_DECLS
+
+__cdecl __MINGW_NOTHROW
+int __mingw_sleep( unsigned long, unsigned long );
-#ifndef SEEK_END
-#define SEEK_END 2
+/* The nanosleep() function provides the most general purpose API for
+ * process/thread suspension; it is declared in <time.h>, (where it is
+ * accompanied by an in-line implementation), rather than here, and it
+ * provides for specification of suspension periods in the range from
+ * ~7.5 ms mean, (on WinNT derivatives; ~27.5 ms on Win9x), extending
+ * up to ~136 years, (effectively eternity).
+ *
+ * The usleep() function, and its associated useconds_t type specifier
+ * were made obsolete in POSIX.1-2008; declared here, only for backward
+ * compatibility, its continued use is not recommended. (It is limited
+ * to specification of suspension periods ranging from ~7.5 ms mean up
+ * to a maximum of 999,999 microseconds only).
+ */
+typedef unsigned long useconds_t __MINGW_ATTRIB_DEPRECATED;
+int __cdecl __MINGW_NOTHROW usleep( useconds_t )__MINGW_ATTRIB_DEPRECATED;
+
+#ifndef __NO_INLINE__
+__CRT_INLINE __LIBIMPL__(( FUNCTION = usleep ))
+int usleep( useconds_t period ){ return __mingw_sleep( 0, 1000 * period ); }
#endif
-_BEGIN_C_DECLS
+/* The sleep() function is, perhaps, the most commonly used of all the
+ * process/thread suspension APIs; it provides support for specification
+ * of suspension periods ranging from 1 second to ~136 years. (However,
+ * POSIX recommends limiting the maximum period to 65535 seconds, to
+ * maintain portability to platforms with only 16-bit ints).
+ */
+unsigned __cdecl __MINGW_NOTHROW sleep( unsigned );
-#if !defined __NO_ISOCEXT
-#include <sys/types.h> /* For useconds_t. */
+#ifndef __NO_INLINE__
+__CRT_INLINE __LIBIMPL__(( FUNCTION = sleep ))
+unsigned sleep( unsigned period ){ return __mingw_sleep( period, 0 ); }
+#endif
-int __cdecl __MINGW_NOTHROW usleep(useconds_t useconds);
-#endif /* Not __NO_ISOCEXT */
-/* This is defined both as a real library function, to allow autoconf
- * to verify its existence, and as a potentially inline implementation.
+/* POSIX ftruncate() function.
+ *
+ * Microsoft's _chsize() function is incorrectly described, on MSDN,
+ * as a preferred replacement for the POSIX chsize() function. There
+ * never was any such POSIX function; the actual POSIX equivalent is
+ * the ftruncate() function.
*/
-int ftruncate(int, off_t);
+int __cdecl ftruncate( int, off_t );
+
#ifndef __NO_INLINE__
__CRT_INLINE __JMPSTUB__(( FUNCTION = ftruncate, REMAPPED = _chsize ))
-int ftruncate(int __fd, off_t __length)
-{ return _chsize (__fd, __length); }
+int ftruncate( int __fd, off_t __length ){ return _chsize( __fd, __length ); }
#endif
_END_C_DECLS
+#endif /* _POSIX_C_SOURCE */
+
#undef __UNISTD_H_SOURCED__
-#endif /* _UNISTD_H */
+#endif /* ! _UNISTD_H: $RCSfile$: end of file */
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