mirror of
https://github.com/HDFGroup/hdf5.git
synced 2025-02-11 16:01:00 +08:00
221 lines
7.2 KiB
HTML
221 lines
7.2 KiB
HTML
<html>
|
|
<head><title>
|
|
HDF5/H5 Draft API Specification
|
|
</title></head>
|
|
|
|
<body>
|
|
|
|
<hr>
|
|
<center>
|
|
<a href="RM_H5Front.html">HDF5 Reference Manual</a>
|
|
H5
|
|
<a href="RM_H5A.html">H5A</a>
|
|
<a href="RM_H5D.html">H5D</a>
|
|
<a href="RM_H5E.html">H5E</a>
|
|
<a href="RM_H5F.html">H5F</a>
|
|
<a href="RM_H5G.html">H5G</a>
|
|
<a href="RM_H5P.html">H5P</a>
|
|
<a href="RM_H5S.html">H5S</a>
|
|
<a href="RM_H5T.html">H5T</a>
|
|
<a href="RM_H5Z.html">H5Z</a>
|
|
<a href="Glossary.html">Glossary</a>
|
|
</center>
|
|
<hr>
|
|
|
|
<center>
|
|
<h1>H5: General Library Functions</h1>
|
|
</center>
|
|
|
|
These functions serve general-purpose needs of the HDF5 library
|
|
and it users.
|
|
|
|
<table border=0>
|
|
<tr><td valign=top>
|
|
<ul>
|
|
<li><a href="#Library-Open">H5open</a>
|
|
<li><a href="#Library-Close">H5close</a>
|
|
</ul>
|
|
</td><td> </td><td valign=top>
|
|
<ul>
|
|
<li><a href="#Library-Version">H5version</a>
|
|
<li><a href="#Library-VersCheck">H5vers_check</a>
|
|
</ul>
|
|
</td><td> </td><td valign=top>
|
|
<ul>
|
|
<li><a href="#Library-DontAtExit">H5dont_atexit</a>
|
|
</ul>
|
|
</td></tr>
|
|
</table>
|
|
|
|
|
|
<hr>
|
|
<dl>
|
|
<dt><strong>Name:</strong> <a name="Library-Open">H5open</a>
|
|
<dt><strong>Signature:</strong>
|
|
<dd><em>herr_t</em> <code>H5open</code>(<em>void</em>)
|
|
<dt><strong>Purpose:</strong>
|
|
<dd>Flushes all data to disk, closes file identifiers, and cleans up memory.
|
|
<dt><strong>Description:</strong>
|
|
<dd><code>H5open</code> initialize the library. This function is
|
|
normally called automatically, but if you find that an
|
|
HDF5 library function is failing inexplicably, try calling
|
|
this function first.
|
|
<dt><strong>Parameters:</strong>
|
|
<dl>
|
|
<dt>None.
|
|
</dl>
|
|
<dt><strong>Returns:</strong>
|
|
<dd>Returns SUCCEED (0) if successful;
|
|
otherwise FAIL (-1).
|
|
</dl>
|
|
|
|
|
|
<hr>
|
|
<dl>
|
|
<dt><strong>Name:</strong> <a name="Library-Close">H5close</a>
|
|
<dt><strong>Signature:</strong>
|
|
<dd><em>herr_t</em> <code>H5close</code>(<em>void</em>)
|
|
<dt><strong>Purpose:</strong>
|
|
<dd>Flushes all data to disk, closes file identifiers, and cleans up memory.
|
|
<dt><strong>Description:</strong>
|
|
<dd><code>H5close</code> flushes all data to disk,
|
|
closes all file identifiers, and cleans up all memory used by
|
|
the library. This function is generall called when the
|
|
application calls <code>exit</code>, but may be called earlier
|
|
in event of an emergency shutdown or out of desire to free all
|
|
resources used by the HDF5 library.
|
|
<dt><strong>Parameters:</strong>
|
|
<dl>
|
|
<dt>None.
|
|
</dl>
|
|
<dt><strong>Returns:</strong>
|
|
<dd>Returns SUCCEED (0) if successful;
|
|
otherwise FAIL (-1).
|
|
</dl>
|
|
|
|
|
|
<hr>
|
|
<dl>
|
|
<dt><strong>Name:</strong> <a name="Library-DontAtExit">H5dont_atexit</a>
|
|
<dt><strong>Signature:</strong>
|
|
<dd><em>herr_t</em> <code>H5dont_atexit</code>(<em>void</em>)
|
|
<dt><strong>Purpose:</strong>
|
|
<dd>Instructs library not to install <code>atexit</code> cleanup routine.
|
|
<dt><strong>Description:</strong>
|
|
<dd><code>H5dont_atexit</code> indicates to the library that an
|
|
<code>atexit()</code> cleanup routine should not be installed.
|
|
The major purpose for this is in situations where the
|
|
library is dynamically linked into an application and is
|
|
un-linked from the application before <code>exit()</code> gets
|
|
called. In those situations, a routine installed with
|
|
<code>atexit()</code> would jump to a routine which was
|
|
no longer in memory, causing errors.
|
|
<p>
|
|
In order to be effective, this routine <em>must</em> be called
|
|
before any other HDF function calls, and must be called each
|
|
time the library is loaded/linked into the application
|
|
(the first time and after it's been un-loaded).
|
|
<dt><strong>Parameters:</strong>
|
|
<dl>
|
|
<dt>None.
|
|
</dl>
|
|
<dt><strong>Returns:</strong>
|
|
<dd>Returns SUCCEED (0) if successful;
|
|
otherwise FAIL (-1).
|
|
</dl>
|
|
|
|
|
|
<hr>
|
|
<dl>
|
|
<dt><strong>Name:</strong> <a name="Library-Version">H5version</a>
|
|
<dt><strong>Signature:</strong>
|
|
<dd><em>herr_t</em> <code>H5version</code>(<em>unsigned *</em><code>majnum</code>,
|
|
<em>unsigned *</em><code>minnum</code>,
|
|
<em>unsigned *</em><code>relnum</code>,
|
|
<em>unsigned *</em><code>patnum</code>
|
|
)
|
|
<dt><strong>Purpose:</strong>
|
|
<dd>
|
|
<dt><strong>Description:</strong>
|
|
<dd><code>H5version</code> retrieves the major, minor, release, and
|
|
patch versions of the library which is linked to the application.
|
|
<dt><strong>Parameters:</strong>
|
|
<dl>
|
|
<dt><em>unsigned *</em><code>majnum</code>
|
|
<dd>The major version of the library.
|
|
<dt><em>unsigned *</em><code>minnum</code>
|
|
<dd>The minor version of the library.
|
|
<dt><em>unsigned *</em><code>relnum</code>
|
|
<dd>The release number of the library.
|
|
<dt><em>unsigned *</em><code>patnum</code>
|
|
<dd>The patch number of the library.
|
|
</dl>
|
|
<dt><strong>Returns:</strong>
|
|
<dd>Returns SUCCEED (0) if successful;
|
|
otherwise FAIL (-1).
|
|
</dl>
|
|
|
|
|
|
<hr>
|
|
<dl>
|
|
<dt><strong>Name:</strong> <a name="Library-VersCheck">H5vers_check</a>
|
|
<dt><strong>Signature:</strong>
|
|
<dd><em>herr_t</em> <code>H5vers_check</code>(<em>unsigned *</em><code>majnum</code>,
|
|
<em>unsigned *</em><code>minnum</code>,
|
|
<em>unsigned *</em><code>relnum</code>,
|
|
<em>unsigned *</em><code>patnum</code>
|
|
)
|
|
<dt><strong>Purpose:</strong>
|
|
<dd>
|
|
<dt><strong>Description:</strong>
|
|
<dd><code>H5vers_check</code> verifies that the arguments match the
|
|
version numbers compiled into the library. This function is intended
|
|
to be called from user to verify that the versions of header files
|
|
compiled into the application match the version of the HDF5 library.
|
|
<p>
|
|
Due to the risks of data corruption or segmentation faults,
|
|
<code>H5vers_check</code> causes the application to abort if the
|
|
version numbers do not match.
|
|
<dt><strong>Parameters:</strong>
|
|
<dl>
|
|
<dt><em>unsigned *</em><code>majnum</code>
|
|
<dd>The major version of the library.
|
|
<dt><em>unsigned *</em><code>minnum</code>
|
|
<dd>The minor version of the library.
|
|
<dt><em>unsigned *</em><code>relnum</code>
|
|
<dd>The release number of the library.
|
|
<dt><em>unsigned *</em><code>patnum</code>
|
|
<dd>The patch number of the library.
|
|
</dl>
|
|
<dt><strong>Returns:</strong>
|
|
<dd>Returns SUCCEED (0) if successful.
|
|
Upon failure, this function causes the application to abort.
|
|
</dl>
|
|
|
|
|
|
<hr>
|
|
<center>
|
|
<a href="RM_H5Front.html">HDF5 Reference Manual</a>
|
|
H5
|
|
<a href="RM_H5A.html">H5A</a>
|
|
<a href="RM_H5D.html">H5D</a>
|
|
<a href="RM_H5E.html">H5E</a>
|
|
<a href="RM_H5F.html">H5F</a>
|
|
<a href="RM_H5G.html">H5G</a>
|
|
<a href="RM_H5P.html">H5P</a>
|
|
<a href="RM_H5S.html">H5S</a>
|
|
<a href="RM_H5T.html">H5T</a>
|
|
<a href="RM_H5Z.html">H5Z</a>
|
|
<a href="Glossary.html">Glossary</a>
|
|
</center>
|
|
<hr>
|
|
|
|
<address>
|
|
<a href="mailto:hdfhelp@ncsa.uiuc.edu">HDF Help Desk</a>
|
|
|
|
<br>
|
|
Last modified: 14 July 1998
|
|
|
|
</body>
|
|
</html>
|