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| <title>The GNU Fortran Compiler: C_FUNLOC</title> |
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| <a name="C_005fFUNLOC-_002d_002d_002d-Obtain-the-C-address-of-a-procedure"></a> |
| <h3 class="section">8.42 <code>C_FUNLOC</code> — Obtain the C address of a procedure</h3> |
| <a name="index-C_005fFUNLOC"></a> |
| <a name="index-pointer_002c-C-address-of-procedures"></a> |
| |
| <dl compact="compact"> |
| <dt><em>Description</em>:</dt> |
| <dd><p><code>C_FUNLOC(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_FUNLOC(x)</code> |
| </p> |
| </dd> |
| <dt><em>Arguments</em>:</dt> |
| <dd><table> |
| <tr><td width="15%"><var>x</var></td><td width="70%">Interoperable function or pointer to such function.</td></tr> |
| </table> |
| |
| </dd> |
| <dt><em>Return value</em>:</dt> |
| <dd><p>The return value is of type <code>C_FUNPTR</code> and contains the C address |
| of the argument. |
| </p> |
| </dd> |
| <dt><em>Example</em>:</dt> |
| <dd><div class="smallexample"> |
| <pre class="smallexample">module x |
| use iso_c_binding |
| implicit none |
| contains |
| subroutine sub(a) bind(c) |
| real(c_float) :: a |
| a = sqrt(a)+5.0 |
| end subroutine sub |
| end module x |
| program main |
| use iso_c_binding |
| use x |
| implicit none |
| interface |
| subroutine my_routine(p) bind(c,name='myC_func') |
| import :: c_funptr |
| type(c_funptr), intent(in) :: p |
| end subroutine |
| end interface |
| call my_routine(c_funloc(sub)) |
| end program main |
| </pre></div> |
| |
| </dd> |
| <dt><em>See also</em>:</dt> |
| <dd><p><a href="C_005fASSOCIATED.html#C_005fASSOCIATED">C_ASSOCIATED</a>, <a href="C_005fLOC.html#C_005fLOC">C_LOC</a>, <a href="C_005fF_005fPOINTER.html#C_005fF_005fPOINTER">C_F_POINTER</a>, <a href="C_005fF_005fPROCPOINTER.html#C_005fF_005fPROCPOINTER">C_F_PROCPOINTER</a> |
| </p></dd> |
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