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    <innerclass refid="classgr__buffer" prot="public">gr_buffer</innerclass>
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        <definition>gr_buffer_sptr gr_make_buffer</definition>
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        <name>gr_make_buffer</name>
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          <type>int</type>
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          <type>size_t</type>
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          <type><ref refid="classboost_1_1shared__ptr" kindref="compound">gr_block_sptr</ref></type>
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<para>Allocate a buffer that holds at least <computeroutput>nitems</computeroutput> of size <computeroutput>sizeof_item</computeroutput>. </para>        </briefdescription>
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<para>The total size of the buffer will be rounded up to a system dependent boundary. This is typically the system page size, but under MS windows is 64KB.</para><para><parameterlist kind="param"><parameteritem>
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<parametername>nitems</parametername>
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<para>is the minimum number of items the buffer will hold. </para></parameterdescription>
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<parametername>sizeof_item</parametername>
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<para>is the size of an item in bytes. </para></parameterdescription>
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<parametername>link</parametername>
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<para>is the block that writes to this buffer. </para></parameterdescription>
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<para>Create a new <ref refid="classgr__buffer__reader" kindref="compound">gr_buffer_reader</ref> and attach it to buffer <computeroutput>buf</computeroutput>. </para>        </briefdescription>
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<para><parameterlist kind="param"><parameteritem>
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<parametername>buf</parametername>
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<para>is the buffer the <computeroutput><ref refid="classgr__buffer__reader" kindref="compound">gr_buffer_reader</ref></computeroutput> reads from. </para></parameterdescription>
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<parameteritem>
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<parametername>nzero_preload</parametername>
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<parameterdescription>
<para>-- number of zero items to &quot;preload&quot; into buffer. </para></parameterdescription>
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<parametername>link</parametername>
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<para>is the block that reads from the buffer using this <ref refid="classgr__buffer__reader" kindref="compound">gr_buffer_reader</ref>. </para></parameterdescription>
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<para>returns # of gr_buffers currently allocated </para>        </briefdescription>
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<para>returns # of gr_buffer_readers currently allocated </para>        </briefdescription>
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