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| author | alk3pInjection <webmaster@raspii.tech> | 2024-02-04 16:16:35 +0800 |
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| committer | alk3pInjection <webmaster@raspii.tech> | 2024-02-04 16:16:35 +0800 |
| commit | abdaadbcae30fe0c9a66c7516798279fdfd97750 (patch) | |
| tree | 00a54a6e25601e43876d03c1a4a12a749d4a914c /share/doc/gfortran/FLUSH.html | |
https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads
Change-Id: I7303388733328cd98ab9aa3c30236db67f2e9e9c
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diff --git a/share/doc/gfortran/FLUSH.html b/share/doc/gfortran/FLUSH.html new file mode 100644 index 0000000..9396f48 --- /dev/null +++ b/share/doc/gfortran/FLUSH.html @@ -0,0 +1,157 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> +<html> +<!-- Copyright (C) 1999-2023 Free Software Foundation, Inc. + +Permission is granted to copy, distribute and/or modify this document +under the terms of the GNU Free Documentation License, Version 1.3 or +any later version published by the Free Software Foundation; with the +Invariant Sections being "Funding Free Software", the Front-Cover +Texts being (a) (see below), and with the Back-Cover Texts being (b) +(see below). A copy of the license is included in the section entitled +"GNU Free Documentation License". + +(a) The FSF's Front-Cover Text is: + +A GNU Manual + +(b) The FSF's Back-Cover Text is: + +You have freedom to copy and modify this GNU Manual, like GNU + software. Copies published by the Free Software Foundation raise + funds for GNU development. --> +<!-- Created by GNU Texinfo 5.1, http://www.gnu.org/software/texinfo/ --> +<head> +<title>The GNU Fortran Compiler: FLUSH</title> + +<meta name="description" content="The GNU Fortran Compiler: FLUSH"> +<meta name="keywords" content="The GNU Fortran Compiler: FLUSH"> +<meta name="resource-type" content="document"> +<meta name="distribution" content="global"> +<meta name="Generator" content="makeinfo"> +<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> +<link href="index.html#Top" rel="start" title="Top"> +<link href="Option-Index.html#Option-Index" rel="index" title="Option Index"> +<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> +<link href="Intrinsic-Procedures.html#Intrinsic-Procedures" rel="up" title="Intrinsic Procedures"> +<link href="FNUM.html#FNUM" rel="next" title="FNUM"> +<link href="FLOOR.html#FLOOR" rel="previous" title="FLOOR"> +<style type="text/css"> +<!-- +a.summary-letter {text-decoration: none} +blockquote.smallquotation {font-size: smaller} +div.display {margin-left: 3.2em} +div.example {margin-left: 3.2em} +div.indentedblock {margin-left: 3.2em} +div.lisp {margin-left: 3.2em} +div.smalldisplay {margin-left: 3.2em} +div.smallexample {margin-left: 3.2em} +div.smallindentedblock {margin-left: 3.2em; font-size: smaller} +div.smalllisp {margin-left: 3.2em} +kbd {font-style:oblique} +pre.display {font-family: inherit} +pre.format {font-family: inherit} +pre.menu-comment {font-family: serif} +pre.menu-preformatted {font-family: serif} +pre.smalldisplay {font-family: inherit; font-size: smaller} +pre.smallexample {font-size: smaller} +pre.smallformat {font-family: inherit; font-size: smaller} +pre.smalllisp {font-size: smaller} +span.nocodebreak {white-space:nowrap} +span.nolinebreak {white-space:nowrap} +span.roman {font-family:serif; font-weight:normal} +span.sansserif {font-family:sans-serif; font-weight:normal} +ul.no-bullet {list-style: none} +--> +</style> + + +</head> + +<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000"> +<a name="FLUSH"></a> +<div class="header"> +<p> +Next: <a href="FNUM.html#FNUM" accesskey="n" rel="next">FNUM</a>, Previous: <a href="FLOOR.html#FLOOR" accesskey="p" rel="previous">FLOOR</a>, Up: <a href="Intrinsic-Procedures.html#Intrinsic-Procedures" accesskey="u" rel="up">Intrinsic Procedures</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p> +</div> +<hr> +<a name="FLUSH-_002d_002d_002d-Flush-I_002fO-unit_0028s_0029"></a> +<h3 class="section">8.110 <code>FLUSH</code> — Flush I/O unit(s)</h3> +<a name="index-FLUSH"></a> +<a name="index-file-operation_002c-flush"></a> + +<dl compact="compact"> +<dt><em>Description</em>:</dt> +<dd><p>Flushes Fortran unit(s) currently open for output. Without the optional +argument, all units are flushed, otherwise just the unit specified. +</p> +</dd> +<dt><em>Standard</em>:</dt> +<dd><p>GNU extension +</p> +</dd> +<dt><em>Class</em>:</dt> +<dd><p>Subroutine +</p> +</dd> +<dt><em>Syntax</em>:</dt> +<dd><p><code>CALL FLUSH(UNIT)</code> +</p> +</dd> +<dt><em>Arguments</em>:</dt> +<dd><table> +<tr><td width="15%"><var>UNIT</var></td><td width="70%">(Optional) The type shall be <code>INTEGER</code>.</td></tr> +</table> + +</dd> +<dt><em>Note</em>:</dt> +<dd><p>Beginning with the Fortran 2003 standard, there is a <code>FLUSH</code> +statement that should be preferred over the <code>FLUSH</code> intrinsic. +</p> +<p>The <code>FLUSH</code> intrinsic and the Fortran 2003 <code>FLUSH</code> statement +have identical effect: they flush the runtime library’s I/O buffer so +that the data becomes visible to other processes. This does not guarantee +that the data is committed to disk. +</p> +<p>On POSIX systems, you can request that all data is transferred to the +storage device by calling the <code>fsync</code> function, with the POSIX file +descriptor of the I/O unit as argument (retrieved with GNU intrinsic +<code>FNUM</code>). The following example shows how: +</p> +<div class="smallexample"> +<pre class="smallexample"> ! Declare the interface for POSIX fsync function + interface + function fsync (fd) bind(c,name="fsync") + use iso_c_binding, only: c_int + integer(c_int), value :: fd + integer(c_int) :: fsync + end function fsync + end interface + + ! Variable declaration + integer :: ret + + ! Opening unit 10 + open (10,file="foo") + + ! ... + ! Perform I/O on unit 10 + ! ... + + ! Flush and sync + flush(10) + ret = fsync(fnum(10)) + + ! Handle possible error + if (ret /= 0) stop "Error calling FSYNC" +</pre></div> + +</dd> +</dl> + + + + + + +</body> +</html> |