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<title>The GNU Fortran Compiler: _gfortran_caf_send</title>
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<p>
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Next: <a href="_005fgfortran_005fcaf_005fget.html#g_t_005fgfortran_005fcaf_005fget" accesskey="n" rel="next">_gfortran_caf_get</a>, Previous: <a href="_005fgfortran_005fcaf_005fderegister.html#g_t_005fgfortran_005fcaf_005fderegister" accesskey="p" rel="prev">_gfortran_caf_deregister</a>, Up: <a href="Function-ABI-Documentation.html#Function-ABI-Documentation" accesskey="u" rel="up">Function ABI Documentation</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>
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<a name="g_t_005fgfortran_005fcaf_005fsend-_002d_002d_002d-Sending-data-from-a-local-image-to-a-remote-image"></a>
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<h4 class="subsection">8.2.7 <code>_gfortran_caf_send</code> — Sending data from a local image to a remote image</h4>
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<a name="index-Coarray_002c-_005fgfortran_005fcaf_005fsend"></a>
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<dl compact="compact">
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<dt><em>Description</em>:</dt>
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<dd><p>Called to send a scalar, an array section or whole array from a local
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to a remote image identified by the image_index.
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</p>
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</dd>
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<dt><em>Syntax</em>:</dt>
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<dd><p><code>void _gfortran_caf_send (caf_token_t token, size_t offset,
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int image_index, gfc_descriptor_t *dest, caf_vector_t *dst_vector,
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gfc_descriptor_t *src, int dst_kind, int src_kind, bool may_require_tmp)</code>
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</p>
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</dd>
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<dt><em>Arguments</em>:</dt>
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<dd><table>
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<tr><td width="15%"><var>token</var></td><td width="70%">intent(in) An opaque pointer identifying the coarray.</td></tr>
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<tr><td width="15%"><var>offset</var></td><td width="70%">By which amount of bytes the actual data is shifted
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compared to the base address of the coarray.</td></tr>
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<tr><td width="15%"><var>image_index</var></td><td width="70%">The ID of the remote image; must be a positive
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number.</td></tr>
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<tr><td width="15%"><var>dest</var></td><td width="70%">intent(in) Array descriptor for the remote image for the
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bounds and the size. The base_addr shall not be accessed.</td></tr>
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<tr><td width="15%"><var>dst_vector</var></td><td width="70%">intent(int) If not NULL, it contains the vector
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subscript of the destination array; the values are relative to the dimension
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triplet of the dest argument.</td></tr>
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<tr><td width="15%"><var>src</var></td><td width="70%">intent(in) Array descriptor of the local array to be
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transferred to the remote image</td></tr>
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<tr><td width="15%"><var>dst_kind</var></td><td width="70%">Kind of the destination argument</td></tr>
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<tr><td width="15%"><var>src_kind</var></td><td width="70%">Kind of the source argument</td></tr>
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<tr><td width="15%"><var>may_require_tmp</var></td><td width="70%">The variable is false it is known at compile
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time that the <var>dest</var> and <var>src</var> either cannot overlap or overlap (fully
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or partially) such that walking <var>src</var> and <var>dest</var> in element wise
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element order (honoring the stride value) will not lead to wrong results.
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Otherwise, the value is true.</td></tr>
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</table>
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</dd>
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<dt><em>NOTES</em></dt>
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<dd><p>It is permitted to have image_id equal the current image; the memory of the
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send-to and the send-from might (partially) overlap in that case. The
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implementation has to take care that it handles this case, e.g. using
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<code>memmove</code> which handles (partially) overlapping memory. If
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<var>may_require_tmp</var> is true, the library might additionally create a
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temporary variable, unless additional checks show that this is not required
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(e.g. because walking backward is possible or because both arrays are
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contiguous and <code>memmove</code> takes care of overlap issues).
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</p>
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<p>Note that the assignment of a scalar to an array is permitted. In addition,
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the library has to handle numeric-type conversion and for strings, padding
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and different character kinds.
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</p></dd>
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</dl>
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Next: <a href="_005fgfortran_005fcaf_005fget.html#g_t_005fgfortran_005fcaf_005fget" accesskey="n" rel="next">_gfortran_caf_get</a>, Previous: <a href="_005fgfortran_005fcaf_005fderegister.html#g_t_005fgfortran_005fcaf_005fderegister" accesskey="p" rel="prev">_gfortran_caf_deregister</a>, Up: <a href="Function-ABI-Documentation.html#Function-ABI-Documentation" accesskey="u" rel="up">Function ABI Documentation</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>
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