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| author | Frank Baker <fbaker@hdfgroup.org> | 2003-03-24 21:09:42 (GMT) |
|---|---|---|
| committer | Frank Baker <fbaker@hdfgroup.org> | 2003-03-24 21:09:42 (GMT) |
| commit | 32be22e7939080bdc5f259a860cb6860ad3373d7 (patch) | |
| tree | b43e15950f0037dcf2b1d0dc6ee2108f23f95cd8 /doc/html/RM_H5P.html | |
| parent | 06ee92414dd1e9b5e64ee1c7f1fc4141ef01cdff (diff) | |
| download | hdf5-32be22e7939080bdc5f259a860cb6860ad3373d7.zip hdf5-32be22e7939080bdc5f259a860cb6860ad3373d7.tar.gz hdf5-32be22e7939080bdc5f259a860cb6860ad3373d7.tar.bz2 | |
[svn-r6520]
Purpose:
Adding descriptions of new library features to the RM
Description:
H5Pset_fapl_log: Added new 'buf_size' parameter.
New 'flags' parameter replaced 'verbosity' parameter,
requiring new table describing 20 available flags.
H5Pset_filter: Added valid 'filter' parameter values.
Modified for Fletcher32 EDC filter.
H5Pget_filter: Added return value descriptions.
H5Pset_layout & H5Pget_layout: Modified for compact datasets.
Added the following new functions:
H5Pset_fletcher32
H5Pset_edc_check & H5Pget_edc_check
H5Pset_filter_callback
H5Pset_shuffle
Platforms tested:
Safari
IE 6
Diffstat (limited to 'doc/html/RM_H5P.html')
| -rw-r--r-- | doc/html/RM_H5P.html | 611 |
1 files changed, 555 insertions, 56 deletions
diff --git a/doc/html/RM_H5P.html b/doc/html/RM_H5P.html index 685c1bb..450599c 100644 --- a/doc/html/RM_H5P.html +++ b/doc/html/RM_H5P.html @@ -3,7 +3,8 @@ HDF5/H5P API Specification </title> -<!-- #BeginLibraryItem "/ed_libs/styles_RM.lbi" --><link href="ed_styles/RMelect.css" rel="stylesheet" type="text/css"><!-- #EndLibraryItem --></head> +<!-- #BeginLibraryItem "/ed_libs/styles_RM.lbi" --><link href="ed_styles/RMelect.css" rel="stylesheet" type="text/css"><!-- #EndLibraryItem --> +</head> <body bgcolor="#FFFFFF"> @@ -42,13 +43,15 @@ And in this document, the </table> </center> <hr> -<!-- #EndLibraryItem --><center> +<!-- #EndLibraryItem --> + +<center> <h1>H5P: Property List Interface</h1> </center> <h2>Property List API Functions</h2> -These functions manipulate property list objects to allow objects which require -many different parameters to be easily manipulated. +These functions manipulate property list objects to allow objects +which require many different parameters to be easily manipulated. <p> @@ -170,6 +173,8 @@ many different parameters to be easily manipulated. <li><a href="#Property-SetFilter">H5Pset_filter</a> <li><a href="#Property-GetNFilters">H5Pget_nfilters</a> <li><a href="#Property-GetFilter">H5Pget_filter</a> + <li><a href="#Property-SetFletcher32">H5Pset_fletcher32</a> + <li><a href="#Property-SetShuffle">H5Pset_shuffle</a> <li><a href="#Property-SetExternal">H5Pset_external</a> <li><a href="#Property-GetExternalCount">H5Pget_external_count</a> <li><a href="#Property-GetExternal">H5Pget_external</a> @@ -181,6 +186,9 @@ many different parameters to be easily manipulated. <li><a href="#Property-GetBuffer">H5Pget_buffer</a> <li><a href="#Property-SetPreserve">H5Pset_preserve</a> <li><a href="#Property-GetPreserve">H5Pget_preserve</a> + <li><a href="#Property-SetEdcCheck">H5Pset_edc_check</a> + <li><a href="#Property-GetEdcCheck">H5Pget_edc_check</a> + <li><a href="#Property-SetFilterCallback">H5Pset_filter_callback</a> <li><a href="#Property-SetHyperCache">H5Pset_hyper_cache</a> <li><a href="#Property-GetHyperCache">H5Pget_hyper_cache</a> <li><a href="#Property-SetBTreeRatios">H5Pset_btree_ratios</a> @@ -2427,24 +2435,25 @@ facilitate moving easily between them.</i> <em>H5D_layout_t</em> <code>layout</code> ) <dt><strong>Purpose:</strong> - <dd>Sets the type of storage used store the raw data for a dataset. + <dd>Sets the type of storage used to store the raw data for a dataset. <dt><strong>Description:</strong> - <dd><code>H5Pset_layout</code> sets the type of storage used store the + <dd><code>H5Pset_layout</code> sets the type of storage used to store the raw data for a dataset. This function is only valid for dataset creation property lists. - Valid parameters for <code>layout</code> are: + <p> + Valid values for <code>layout</code> are: <ul><dl> - <dt>H5D_COMPACT <i><b>(Not yet implemented.)</b></i> - <dd>Store raw data and object header contiguously in file. + <dt>H5D_COMPACT + <dd>Store raw data in the dataset object header in file. This should only be used for very small amounts of raw - data (suggested less than 1KB). + data. + The current limit is approximately 64K (HDF5 Release 1.6). <dt>H5D_CONTIGUOUS - <dd>Store raw data separately from object header in one + <dd>Store raw data separately from the object header in one large chunk in the file. <dt>H5D_CHUNKED - <dd>Store raw data separately from object header in one - large chunk in the file and store chunks of the raw - data in separate locations in the file. + <dd>Store raw data separately from the object header as + chunks of data in separate locations in the file. </dl></ul> <dt><strong>Parameters:</strong> <dl> @@ -2476,26 +2485,29 @@ facilitate moving easily between them.</i> <dt><strong>Description:</strong> <dd><code>H5Pget_layout</code> returns the layout of the raw data for a dataset. This function is only valid for dataset creation - property lists. Valid types for <code>layout</code> are: - <ul> <dl> - <dt>H5D_COMPACT <i><b>(Not yet implemented.)</b></i> - <dd>Raw data and object header stored contiguously in file. - <dt>H5D_CONTIGUOUS - <dd>Raw data stored separately from object header in one - large chunk in the file. - <dt>H5D_CHUNKED - <dd>Raw data stored separately from object header in - chunks in separate locations in the file. - </dl> </ul> + property lists. + <dt><strong>Parameters:</strong> <dl> <dt><em>hid_t</em> <code>plist</code> <dd>IN: Identifier for property list to query. </dl> <dt><strong>Returns:</strong> - <dd>Returns the layout type of a a dataset creation property list - if successful. - Otherwise returns H5D_LAYOUT_ERROR (-1). + <dd>Returns the layout type (a non-negative value) + of a dataset creation property list if successful. + Valid return values are: + <ul> <dl> + <dt>H5D_COMPACT + <dd>Raw data is stored in the object header in the file. + <dt>H5D_CONTIGUOUS + <dd>Raw data is stored separately from the object header in + one contiguous chunk in the file. + <dt>H5D_CHUNKED + <dd>Raw data is stored separately from the object header in + chunks in separate locations in the file. + </dl> </ul> + <p> + Otherwise, returns a negative value indicating faliure. <dt><strong>Non-C API(s):</strong> <dd><a href="fortran/h5p_FORTRAN.html#h5pget_layout_f" target="FortranWin"><img src="Graphics/FORTRAN.gif" border=0></a> @@ -2941,10 +2953,9 @@ facilitate moving easily between them.</i> the following fields specifying certain general properties of the filter: <center> - <table align=center width="80%"> + <table align=center width="75%"> <tr valign=top> - <td valign=top><code>H5Z_FLAG_OPTIONAL</code></td> - <td> </td> + <td valign=top><code>H5Z_FLAG_OPTIONAL</code> </td> <td valign=top>If this bit is set then the filter is optional. If the filter fails (see below) during an <code>H5Dwrite</code> operation then the filter is @@ -2952,17 +2963,43 @@ facilitate moving easily between them.</i> it failed; the filter will not participate in the pipeline during an <code>H5Dread</code> of the chunk. This is commonly used for compression filters: if the - compression result would be larger than the input then + filter result would be larger than the input, then the compression filter returns failure and the uncompressed data is stored in the file. If this bit is - clear and a filter fails then <code>H5Dwrite</code> - or <code>H5Dread</code> also fails.</td> + clear and a filter fails, then <code>H5Dwrite</code> + or <code>H5Dread</code> also fails. + <p> + This flag is mandatory for the Fletcher32 checksum filter.</td> </tr> </table> </center> + <p> + The <code>filter</code> parameter specifies the filter to be set. + Valid values are as follows: + + <center> + <table width=75%> + <tr valign=top align=left><td> + <code>H5Z_FILTER_DEFLATE</code> + </td><td> + Data compression filter, employing the gzip algorithm + </td></tr> + <tr valign=top align=left><td> + <code>H5Z_FILTER_SHUFFLE</code> + </td><td> + Data shuffling filter + </td></tr> + <tr valign=top align=left><td> + <code>H5Z_FILTER_FLETCHER32 </code> + </td><td> + Error detection filter, employing the Fletcher32 checksum algorithm + </td></tr> + </table> + </center> + <dt><strong>Note:</strong> <dd>This function currently supports only the permanent filter - pipeline; <code>plist_id</code> must be a dataset creation + pipeline; <code>plist</code> must be a dataset creation property list. <dt><strong>Parameters:</strong> <dl> @@ -3103,8 +3140,27 @@ facilitate moving easily between them.</i> <dd>OUT: Name of the filter. </dl> <dt><strong>Returns:</strong> - <dd>Returns the filter identification number if successful. - Otherwise returns H5Z_FILTER_ERROR (-1). + <dd>Returns the filter identifier if successful: + <center> + <table width=75%> + <tr valign=top align=left><td> + <code>H5Z_FILTER_DEFLATE</code> + </td><td> + Data compression filter, employing the gzip algorithm + </td></tr> + <tr valign=top align=left><td> + <code>H5Z_FILTER_SHUFFLE</code> + </td><td> + Data shuffling filter + </td></tr> + <tr valign=top align=left><td> + <code>H5Z_FILTER_FLETCHER32 </code> + </td><td> + Error detection filter, employing the Fletcher32 checksum algorithm + </td></tr> + </table> + </center> + Otherwise returns a negative value. <dt><strong>Non-C API(s):</strong> <dd><a href="fortran/h5p_FORTRAN.html#h5pget_filter_f" target="FortranWin"><img src="Graphics/FORTRAN.gif" border=0></a> @@ -3115,6 +3171,248 @@ facilitate moving easily between them.</i> </dl> + + + + + + +<hr> +<dl> + <dt><strong>Name:</strong> <a name="Property-SetShuffle">H5Pset_shuffle</a> + <dt><strong>Signature:</strong> + <dd><em>herr_t</em> <code>H5Pset_shuffle</code>(<em>hid_t</em> <code>plist</code>, + <em>unsigned int</em> <code>bytes_in_type</code>) + <dt><strong>Purpose:</strong> + <dd>Sets up use of the shuffle filter. + <dt><strong>Description:</strong> + <dd><code>H5Pset_shuffle</code> sets the shuffle filter, + <code>H5Z_FILTER_SHUFFLE</code>, + in the dataset creation property list <code>plist</code>. + <p> + The parameter <code>bytes_in_type</code>indicates the size + in bytes of the dataset's datatype. + If the datatype is a struct, <code>bytes_in_type</code> + specifies the size in bytes of the entire struct. + <p> + The shuffle filter <span class=termEmphasis>de-interlaces</span> + a block of data by reordering the bytes. + All the bytes from one consistent byte position of + each data element are placed together in one block; + all bytes from a second consistent byte position of + each data element are placed together in one block; etc. + For example, given three data elements of a 4-byte datatype + stored as <code>012301230123</code>, + shuffling will re-order data as <code>000111222333</code>. + This can be a valuable step in an effective compression + algorithm because the bytes in each byte position are often + closely related to each other and putting them together + can increase the compression ratio. + <dt><strong>Parameters:</strong> + <dl> + <dt><em>hid_t</em> <code>plist</code> + <dd>IN: Dataset creation property list identifier. + <dt><em>unsigned int</em> <code>bytes_in_type</code> + <dd>IN: Size of datatype in bytes. + </dl> + <dt><strong>Returns:</strong> + <dd>Returns a non-negative value if successful; + otherwise returns a negative value. + <!-- + <dt><strong>Non-C API(s):</strong> + <dd><a href="fortran/h5p_FORTRAN.html#h5pget_nfilters_f" + target="FortranWin"><img src="Graphics/FORTRAN.gif" border=0></a> + --> <!-- + <img src="Graphics/Java.gif"> + <img src="Graphics/C++.gif"> + --> +</dl> + +<hr> +<dl> + <dt><strong>Name:</strong> <a name="Property-SetFletcher32">H5Pset_fletcher32</a> + <dt><strong>Signature:</strong> + <dd><em>herr_t</em> <code>H5Pset_fletcher32</code>(<em>hid_t</em> <code>plist</code>) + <dt><strong>Purpose:</strong> + <dd>Sets up use of the Fletcher32 checksum filter. + <dt><strong>Description:</strong> + <dd><code>H5Pset_fletcher32</code> sets the Fletcher32 checksum filter + in the dataset creation property list <code>plist</code>. + <dt><strong>Note:</strong> + <dd>The initial error detection implementation supports + error detection for chunked datasets only. + <dt><strong>Parameters:</strong> + <dl> + <dt><em>hid_t</em> <code>plist</code> + <dd>IN: Dataset creation property list identifier. + </dl> + <dt><strong>Returns:</strong> + <dd>Returns a non-negative value if successful; + otherwise returns a negative value. + <!-- + <dt><strong>Non-C API(s):</strong> + <dd><a href="fortran/h5p_FORTRAN.html#h5pget_nfilters_f" + target="FortranWin"><img src="Graphics/FORTRAN.gif" border=0></a> + --> <!-- + <img src="Graphics/Java.gif"> + <img src="Graphics/C++.gif"> + --> +</dl> + +<hr> +<dl> + <dt><strong>Name:</strong> <a name="Property-SetEdcCheck">H5Pset_edc_check</a> + <dt><strong>Signature:</strong> + <dd><em>herr_t</em> <code>H5Pset_edc_check</code>(<em>hid_t</em> <code>plist</code>, + <em>H5Z_EDC_t</em> <code>check</code>) + <dt><strong>Purpose:</strong> + <dd>Sets whether to enable error-detection when reading a dataset. + <dt><strong>Description:</strong> + <dd><code>H5Pset_edc_check</code> sets the dataset transfer property + list <code>plist</code> to enable or disable error detection + when reading data. + <p> + Whether error detection is enabled or disabled is specified + in the <code>check</code> parameter. + Valid values are as follows: + <table border="0"> + <tr><td> </td><td> + <code>H5Z_ENABLE_EDC</code> + <br> + <code>H5Z_DISABLE_EDC</code> (default) + </td></tr> + </table> + <p> + The error detection algorithm used is the algorithm previously + specified in the corresponding dataset creation property list. + <p> + This function does not affect the use of error detection when + writing data. + <dt><strong>Note:</strong> + <dd>The initial error detection implementation, Fletcher32 checksum, + supports error detection for chunked datasets only. + <dt><strong>Parameters:</strong> + <dl> + <dt><em>hid_t</em> <code>plist</code> + <dd>IN: Dataset transfer property list identifier. + <dt><em>H5Z_EDC_t</em> <code>check</code> + <dd>IN: Specifies whether error checking is enabled or disabled + for dataset read operations. + </dl> + <dt><strong>Returns:</strong> + <dd>Returns a non-negative value if successful; + otherwise returns a negative value. + <!-- + <dt><strong>Non-C API(s):</strong> + <dd><a href="fortran/h5p_FORTRAN.html#h5pget_nfilters_f" + target="FortranWin"><img src="Graphics/FORTRAN.gif" border=0></a> + --> <!-- + <img src="Graphics/Java.gif"> + <img src="Graphics/C++.gif"> + --> +</dl> + +<hr> +<dl> + <dt><strong>Name:</strong> <a name="Property-GetEdcCheck">H5Pget_edc_check</a> + <dt><strong>Signature:</strong> + <dd><em>H5Z_EDC_t</em> <code>H5Pget_edc_check</code>(<em>hid_t</em> <code>plist</code>) + <dt><strong>Purpose:</strong> + <dd>Determines whether error-detection is enabled for dataset reads. + <dt><strong>Description:</strong> + <dd><code>H5Pget_edc_check</code> queries the dataset transfer property + list <code>plist</code> to determine whether error detection + is enabled for data read operations. + <dt><strong>Parameters:</strong> + <dl> + <dt><em>hid_t</em> <code>plist</code> + <dd>IN: Dataset transfer property list identifier. + </dl> + <dt><strong>Returns:</strong> + <dd>Returns <code>H5P_ENABLE_EDC</code> or <code>H5P_DISABLE_EDC</code> + if successful; + otherwise returns a negative value. + <!-- + <dt><strong>Non-C API(s):</strong> + <dd><a href="fortran/h5p_FORTRAN.html#h5pget_nfilters_f" + target="FortranWin"><img src="Graphics/FORTRAN.gif" border=0></a> + --> <!-- + <img src="Graphics/Java.gif"> + <img src="Graphics/C++.gif"> + --> +</dl> + +<hr> +<dl> + <dt><strong>Name:</strong> <a name="Property-SetFilterCallback">H5Pset_filter_callback</a> + <dt><strong>Signature:</strong> + <dd><em>herr_t</em> <code>H5Pset_filter_callback</code>(<em>hid_t</em> <code>plist</code>, + <em>H5Z_filter_func_t</em> <code>func</code>, + <em>void *</em><code>op_data</code>) + <dt><strong>Purpose:</strong> + <dd>Sets user-defined filter callback function. + <dt><strong>Description:</strong> + <dd><code>H5Pset_filter_callback</code> sets the user-defined + filter callback function <code>func</code> in the + dataset transfer property list <code>plist</code>. + <p> + The parameter <code>op_data</code> is a pointer to user-defined + input data for the callback function and will be passed through + to the callback function. + <p> + The callback function <code>func</code> defines the actions + an application is to take when a filter fails. + The function prototype is as follows: + <dir> + <code>typedef</code> <em>H5Z_cb_return_t</em> (<code>H5Z_filter_func_t</code>) + (<em>H5Z_filter_t</em> <code>filter</code>, + <em>void *</em><code>buf</code>, + <em>size_t</em> <code>buf_size</code>, + <em>void *</em><code>op_data</code>) + </dir> + <p> + where <code>filter</code> indicates which filter has failed, + <code>buf</code> and <code>buf_size</code> are used to pass in + the failed data, + and <code>op_data</code> is the required input data for this + callback function. + <p> + Valid callback function return values are + <code>H5Z_CB_FAIL</code> and <code>H5Z_CB_CONT</code>. + <dt><strong>Parameters:</strong> + <dl> + <dt><em>hid_t</em> <code>plist</code> + <dd>IN: Dataset transfer property list identifier. + <dt><em>H5Z_filter_func_t</em> <code>func</code> + <dd>IN: User-defined filter callback function. + <dt><em>void *</em><code>op_data</code> + <dd>IN: User-defined input data for the callback function. + </dl> + <dt><strong>Returns:</strong> + <dd>Returns a non-negative value if successful; + otherwise returns a negative value. + <!-- + <dt><strong>Non-C API(s):</strong> + <dd><a href="fortran/h5p_FORTRAN.html#h5pget_nfilters_f" + target="FortranWin"><img src="Graphics/FORTRAN.gif" border=0></a> + --> <!-- + <img src="Graphics/Java.gif"> + <img src="Graphics/C++.gif"> + --> +</dl> + + + + + + + + + + + + + <hr> <dl> <dt><strong>Name:</strong> <a name="Property-SetMetaBlockSize">H5Pset_meta_block_size</a> @@ -4346,8 +4644,9 @@ facilitate moving easily between them.</i> <dt><strong>Signature:</strong> <dd><em>herr_t</em> <code>H5Pset_fapl_log</code>( <em>hid_t</em> <code>fapl_id</code>, - <em>char *</em><code>logfile</code>, - <em>int</em> <code>verbosity</code> + <em>const char *</em><code>logfile</code>, + <em>unsigned int</em> <code>flags</code>, + <em>size_t</em> <code>buf_size</code> ) <dt><strong>Purpose:</strong> <dd>Sets up the use of the logging driver. @@ -4355,35 +4654,231 @@ facilitate moving easily between them.</i> <dd><code>H5Pset_fapl_log</code> modifies the file access property list to use the logging driver <code>H5FD_LOG</code>. - There are no driver-specific properties. <p> <code>logfile</code> is the name of the file in which the logging entries are to be recorded. <p> - <code>verbosity</code> indicates the extent of the logging - activity intended. Valid values are as follows: + The actions to be logged are specified in the parameter <code>flags</code> + using the pre-defined constants described in the following table. + Multiple flags can be set through the use of an logical OR contained + in parentheses. For example, logging read and write locations would + be specified as <code>(H5FD_LOG_LOC_READ|H5FD_LOG_LOC_WRITE)</code>. + <!--The <code>flags</code> parameter contains a 2-byte hexadecimal value + which is computed from the following elements:--> <center> - <table width=75%> + <table width=100%> <tr valign=top align=left><td> - <code>0</code> + <hr> + <b>Flag</b> + <!--</td><td width="20%"> + <hr> + <b>Hex value</b>--> </td><td> - Performs no logging. + <hr> + <b>Description</b> + </td></tr> + + <tr valign=top align=left><td> + <hr> + <code>H5FD_LOG_LOC_READ</code> + <!--</td><td> + <code>0x0001</code>--> + </td><td rowspan="3"> + <hr> + Track the location and length of every read, write, or seek operation. + </td></tr> + <tr valign=top align=left><td> + <code>H5FD_LOG_LOC_WRITE </code> + <!--</td><td> + <code>0x0002 </code>--> </td></tr> <tr valign=top align=left><td> - <code>1</code> + <code>H5FD_LOG_LOC_SEEK</code> + <!--</td><td> + <code>0x0004</code>--> + </td></tr> + <tr valign=top align=left><td> + <code>H5FD_LOG_LOC_IO</code> + <!--</td><td> + <code>0x0007</code>--> </td><td> - Records where writes and reads occur in the file. + Track all I/O locations and lengths. + The logical equivalent of the following: </td></tr> <tr valign=top align=left><td> - <code>2</code> + <code> </code> </td><td> - Records where writes and reads occur in the file and what - kind of data is written at each location: raw data or any of - several types of metadata (object headers, superblock, - B-tree data, local headers, or global headers). + <code>(H5FD_LOG_LOC_READ | H5FD_LOG_LOC_WRITE | H5FD_LOG_LOC_SEEK)</code> </td></tr> + + <tr valign=top align=left><td> + <hr> + <code>H5FD_LOG_FILE_READ</code> + <!--</td><td> + <code>0x0008</code>--> + </td><td rowspan="2"> + <hr> + Track the number of times each byte is read or written. + </td></tr> + <tr valign=top align=left><td> + <code>H5FD_LOG_FILE_WRITE </code> + <!--</td><td> + <code>0x0010</code>--> + </td></tr> + <tr valign=top align=left><td> + <code>H5FD_LOG_FILE_IO</code> + <!--</td><td> + <code>0x0018</code>--> + </td><td> + Track the number of times each byte is read and written. + The logical equivalent of the following: + </td></tr> + <tr valign=top align=left><td> + <code> </code> + </td><td> + <code>(H5FD_LOG_FILE_READ | H5FD_LOG_FILE_WRITE)</code> + </td></tr> + + <tr valign=top align=left><td> + <hr> + <code>H5FD_LOG_FLAVOR</code> + <!--</td><td> + <code>0x0020</code>--> + </td><td> + <hr> + Track the type, or flavor, of information stored at each byte. + </td></tr> + + <tr valign=top align=left><td> + <hr> + <code>H5FD_LOG_NUM_READ</code> + <!--</td><td> + <code>0x0040</code>--> + </td><td rowspan="3"> + <hr> + Track the total number of read, write, or seek operations that occur. + </td></tr> + <tr valign=top align=left><td> + <code>H5FD_LOG_NUM_WRITE</code> + <!--</td><td> + <code>0x0080</code>--> + </td></tr> + <tr valign=top align=left><td> + <code>H5FD_LOG_NUM_SEEK</code> + <!--</td><td> + <code>0x0100</code>--> + </td></tr> + <tr valign=top align=left><td> + <code>H5FD_LOG_NUM_IO</code> + <!--</td><td> + <code>0x01C0</code>--> + </td><td> + Track the total number of all types of I/O operations. + The logical equivalent of the following: + </td></tr> + <tr valign=top align=left><td> + <code> </code> + </td><td> + <code>(H5FD_LOG_NUM_READ | H5FD_LOG_NUM_WRITE | H5FD_LOG_NUM_SEEK)</code> + </td></tr> + + <tr valign=top align=left><td> + <hr> + <code>H5FD_LOG_TIME_OPEN</code> + <!--</td><td> + <code>0x0200</code>--> + </td><td rowspan="5"> + <hr> + Track the time spent in open, read, write, seek, or close operations. + <dir> + <span class="termEmphasis"><i> + Not implemented in this release: open and read + <br> + Partially implemented: write and seek + <br> + Fully implemented: close</i></span> + </dir> + </td></tr> + <tr valign=top align=left><td> + <code>H5FD_LOG_TIME_READ</code> + <!--</td><td> + <code>0x0400</code>--> + </td></tr> + <tr valign=top align=left><td> + <code>H5FD_LOG_TIME_WRITE</code> + <!--</td><td> + <code>0x0800</code>--> + </td></tr> + <tr valign=top align=left><td> + <code>H5FD_LOG_TIME_SEEK</code> + <!--</td><td> + <code>0x1000</code>--> + </td></tr> + <tr valign=top align=left><td> + <code>H5FD_LOG_TIME_CLOSE</code> + <!--</td><td> + <code>0x2000</code>--> + </td></tr> + <tr valign=top align=left><td> + <code>H5FD_LOG_TIME_IO</code> + <!--</td><td> + <code>0x3E00</code>--> + </td><td> + Track the time spent in each of the above operations. + The logical equivalent of the following: + </td></tr> + <tr valign=top align=left><td> + <code> </code> + </td><td> + <code>(H5FD_LOG_TIME_OPEN | H5FD_LOG_TIME_READ | H5FD_LOG_TIME_WRITE + | H5FD_LOG_TIME_SEEK | H5FD_LOG_TIME_CLOSE)</code> + </td></tr> + + <tr valign=top align=left><td> + <hr> + <code>H5FD_LOG_ALLOC</code> + <!--</td><td> + <code>0x4000</code>--> + </td><td> + <hr> + Track the allocation of space in the file. + </td></tr> + + <tr valign=top align=left><td> + <hr> + <code>H5FD_LOG_ALL</code> + <!--</td><td> + <code>0xFFFF -- all possible + <br>0x8FFF -- all current at r1.6</code>--> + </td><td> + <hr> + Track everything. + The logical equivalent of the following: + </td></tr> + <tr valign=top align=left><td> + <code> </code> + </td><td> + <code>(H5FD_LOG_ALLOC | H5FD_LOG_TIME_IO | H5FD_LOG_NUM_IO | H5FD_LOG_FLAVOR + |H5FD_LOG_FILE_IO | H5FD_LOG_LOC_IO)</code> + </td></tr> + + <tr valign=top align=left><td> + <hr> + </td><td> + <hr> + </td></tr> + </table> </center> + + <p> + The logging driver can track the number of times + each byte in the file is read from or written to + (using <code>H5FD_LOG_FILE_READ</code> and <code>H5FD_LOG_FILE_WRITE</code>) + and what kind of data is at that location + (e.g., meta data, raw data; using <code>H5FD_LOG_FLAVOR</code>). + This information is tracked in a buffer of size <code>buf_size</code>, + which must be at least the size in bytes of the file to be logged. <dt><strong>Parameters:</strong> <dl> @@ -4391,8 +4886,10 @@ facilitate moving easily between them.</i> <dd>IN: File access property list identifier. <dt><em>char *</em><code>logfile</code> <dd>IN: Name of the log file. - <dt><em>int</em> <code>verbosity</code> - <dd>IN: The extent of logging activity intended. + <dt><em>unsigned int</em> <code>flags</code> + <dd>IN: Flags specifying the types of logging activity. + <dt><em>size_t</em> <code>buf_size</code> + <dd>IN: The size of the logging buffer. </dl> <dt><strong>Returns:</strong> <dd>Returns non-negative if successful. @@ -5802,13 +6299,15 @@ And in this document, the </table> </center> <hr> -<!-- #EndLibraryItem --><!-- #BeginLibraryItem "/ed_libs/Footer.lbi" --><address> +<!-- #EndLibraryItem --> + +<!-- #BeginLibraryItem "/ed_libs/Footer.lbi" --><address> <a href="mailto:hdfhelp@ncsa.uiuc.edu">HDF Help Desk</a> <br> Describes HDF5 Release 1.5, Unreleased Development Branch </address><!-- #EndLibraryItem --> -Last modified: 1 October 2002 +Last modified: 20 March 2003 </body> </html> |