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| <title>The GNU Fortran Compiler: CO_BROADCAST</title> |
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| <a name="CO_005fBROADCAST-_002d_002d_002d-Copy-a-value-to-all-images-the-current-set-of-images"></a> |
| <h3 class="section">9.59 <code>CO_BROADCAST</code> — Copy a value to all images the current set of images</h3> |
| <a name="index-CO_005fBROADCAST"></a> |
| <a name="index-Collectives_002c-value-broadcasting"></a> |
| |
| <dl compact="compact"> |
| <dt><em>Description</em>:</dt> |
| <dd><p><code>CO_BROADCAST</code> copies the value of argument <var>A</var> on the image with |
| image index <code>SOURCE_IMAGE</code> to all images in the current team. <var>A</var> |
| becomes defined as if by intrinsic assignment. If the execution was |
| successful and <var>STAT</var> is present, it is assigned the value zero. If the |
| execution failed, <var>STAT</var> gets assigned a nonzero value and, if present, |
| <var>ERRMSG</var> gets assigned a value describing the occurred error. |
| </p> |
| </dd> |
| <dt><em>Standard</em>:</dt> |
| <dd><p>Technical Specification (TS) 18508 or later |
| </p> |
| </dd> |
| <dt><em>Class</em>:</dt> |
| <dd><p>Collective subroutine |
| </p> |
| </dd> |
| <dt><em>Syntax</em>:</dt> |
| <dd><p><code>CALL CO_BROADCAST(A, SOURCE_IMAGE [, STAT, ERRMSG])</code> |
| </p> |
| </dd> |
| <dt><em>Arguments</em>:</dt> |
| <dd><table> |
| <tr><td width="15%"><var>A</var></td><td width="70%">INTENT(INOUT) argument; shall have the same |
| dynamic type and type paramters on all images of the current team. If it |
| is an array, it shall have the same shape on all images.</td></tr> |
| <tr><td width="15%"><var>SOURCE_IMAGE</var></td><td width="70%">a scalar integer expression. |
| It shall have the same the same value on all images and refer to an |
| image of the current team.</td></tr> |
| <tr><td width="15%"><var>STAT</var></td><td width="70%">(optional) a scalar integer variable</td></tr> |
| <tr><td width="15%"><var>ERRMSG</var></td><td width="70%">(optional) a scalar character variable</td></tr> |
| </table> |
| |
| </dd> |
| <dt><em>Example</em>:</dt> |
| <dd><div class="smallexample"> |
| <pre class="smallexample">program test |
| integer :: val(3) |
| if (this_image() == 1) then |
| val = [1, 5, 3] |
| end if |
| call co_broadcast (val, source_image=1) |
| print *, this_image, ":", val |
| end program test |
| </pre></div> |
| |
| </dd> |
| <dt><em>See also</em>:</dt> |
| <dd><p><a href="CO_005fMAX.html#CO_005fMAX">CO_MAX</a>, <a href="CO_005fMIN.html#CO_005fMIN">CO_MIN</a>, <a href="CO_005fSUM.html#CO_005fSUM">CO_SUM</a>, <a href="CO_005fREDUCE.html#CO_005fREDUCE">CO_REDUCE</a> |
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