diff options
Diffstat (limited to 'share/doc/gfortran/C_005fLOC.html')
| -rw-r--r-- | share/doc/gfortran/C_005fLOC.html | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/share/doc/gfortran/C_005fLOC.html b/share/doc/gfortran/C_005fLOC.html new file mode 100644 index 0000000..6ef6bd4 --- /dev/null +++ b/share/doc/gfortran/C_005fLOC.html @@ -0,0 +1,136 @@ +<!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: C_LOC</title> + +<meta name="description" content="The GNU Fortran Compiler: C_LOC"> +<meta name="keywords" content="The GNU Fortran Compiler: C_LOC"> +<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="C_005fSIZEOF.html#C_005fSIZEOF" rel="next" title="C_SIZEOF"> +<link href="C_005fFUNLOC.html#C_005fFUNLOC" rel="previous" title="C_FUNLOC"> +<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="C_005fLOC"></a> +<div class="header"> +<p> +Next: <a href="C_005fSIZEOF.html#C_005fSIZEOF" accesskey="n" rel="next">C_SIZEOF</a>, Previous: <a href="C_005fFUNLOC.html#C_005fFUNLOC" accesskey="p" rel="previous">C_FUNLOC</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="C_005fLOC-_002d_002d_002d-Obtain-the-C-address-of-an-object"></a> +<h3 class="section">8.56 <code>C_LOC</code> — Obtain the C address of an object</h3> +<a name="index-C_005fLOC"></a> +<a name="index-procedure-pointer_002c-convert-C-to-Fortran"></a> + +<dl compact="compact"> +<dt><em>Description</em>:</dt> +<dd><p><code>C_LOC(X)</code> determines the C address of the argument. +</p> +</dd> +<dt><em>Standard</em>:</dt> +<dd><p>Fortran 2003 and later +</p> +</dd> +<dt><em>Class</em>:</dt> +<dd><p>Inquiry function +</p> +</dd> +<dt><em>Syntax</em>:</dt> +<dd><p><code>RESULT = C_LOC(X)</code> +</p> +</dd> +<dt><em>Arguments</em>:</dt> +<dd><table> +<tr><td width="10%"><var>X</var></td><td width="75%">Shall have either the POINTER or TARGET attribute. It shall not be a coindexed object. It shall either be a variable with interoperable type and kind type parameters, or be a scalar, nonpolymorphic variable with no length type parameters.</td></tr> +</table> + +</dd> +<dt><em>Return value</em>:</dt> +<dd><p>The return value is of type <code>C_PTR</code> and contains the C address +of the argument. +</p> +</dd> +<dt><em>Example</em>:</dt> +<dd><div class="smallexample"> +<pre class="smallexample">subroutine association_test(a,b) + use iso_c_binding, only: c_associated, c_loc, c_ptr + implicit none + real, pointer :: a + type(c_ptr) :: b + if(c_associated(b, c_loc(a))) & + stop 'b and a do not point to same target' +end subroutine association_test +</pre></div> + +</dd> +<dt><em>See also</em>:</dt> +<dd><p><a href="C_005fASSOCIATED.html#C_005fASSOCIATED">C_ASSOCIATED</a>, <br> +<a href="C_005fFUNLOC.html#C_005fFUNLOC">C_FUNLOC</a>, <br> +<a href="C_005fF_005fPOINTER.html#C_005fF_005fPOINTER">C_F_POINTER</a>, <br> +<a href="C_005fF_005fPROCPOINTER.html#C_005fF_005fPROCPOINTER">C_F_PROCPOINTER</a> +</p></dd> +</dl> + + + + + +</body> +</html> |