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<div class="headertitle"><div class="title">bitops.h File Reference<div class="ingroups"><a class="el" href="group__l4util__api.html">Utility Functions</a> » <a class="el" href="group__l4util__bitops.html">Bit Manipulation</a></div></div></div>
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<p>bit manipulation functions
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<a href="#details">More...</a></p>
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<div class="textblock"><code>#include <<a class="el" href="l4_2sys_2l4int_8h_source.html">l4/sys/l4int.h</a>></code><br />
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<code>#include <<a class="el" href="compiler_8h_source.html">l4/sys/compiler.h</a>></code><br />
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<code>#include <l4/util/bitops_arch.h></code><br />
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<code>#include <<a class="el" href="l4_2util_2atomic_8h_source.html">l4/util/atomic.h</a>></code><br />
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</div><div class="textblock"><div id="dynsection-0" onclick="return dynsection.toggleVisibility(this)" class="dynheader closed" style="cursor:pointer;"><span class="dynarrow"><span class="arrowhead closed"></span></span>Include dependency graph for bitops.h:</div>
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<div class="center"><iframe scrolling="no" loading="lazy" frameborder="0" src="bitops_8h__incl.svg" width="367" height="256"><p><b>This browser is not able to show SVG: try Firefox, Chrome, Safari, or Opera instead.</b></p></iframe></div>
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<div class="center"><iframe scrolling="no" loading="lazy" frameborder="0" src="bitops_8h__dep__incl.svg" width="391" height="212"><p><b>This browser is not able to show SVG: try Firefox, Chrome, Safari, or Opera instead.</b></p></iframe></div>
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<p><a href="bitops_8h_source.html">Go to the source code of this file.</a></p>
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<table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 id="header-define-members" class="groupheader"><a id="define-members" name="define-members"></a>
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Macros</h2></td></tr>
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<tr class="memitem:ae04f8fdb0ba7298bd9622fdeaec84af1" id="r_ae04f8fdb0ba7298bd9622fdeaec84af1"><td class="memItemLeft" align="right" valign="top"><a id="ae04f8fdb0ba7298bd9622fdeaec84af1" name="ae04f8fdb0ba7298bd9622fdeaec84af1"></a>
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#define </td><td class="memItemRight" valign="bottom"><b>l4util_test_and_clear_bit</b>(b, dest)</td></tr>
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<tr class="memdesc:ae04f8fdb0ba7298bd9622fdeaec84af1"><td class="mdescLeft"> </td><td class="mdescRight">define some more usual names <br /></td></tr>
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</table><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 id="header-func-members" class="groupheader"><a id="func-members" name="func-members"></a>
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Functions</h2></td></tr>
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<tr class="memitem:ga1e5017ce33e0af71dc00a526ffa46f0b" id="r_ga1e5017ce33e0af71dc00a526ffa46f0b"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__l4util__bitops.html#ga1e5017ce33e0af71dc00a526ffa46f0b">l4util_set_bit</a> (int b, volatile <a class="el" href="group__l4__basic__types.html#ga1c2c4b333f75b1d05b59855910f2b9cb">l4_umword_t</a> *dest)</td></tr>
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<tr class="memdesc:ga1e5017ce33e0af71dc00a526ffa46f0b"><td class="mdescLeft"> </td><td class="mdescRight">Set bit in memory. <br /></td></tr>
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<tr class="memitem:gab1ab1fd14748d27abd7862942b5ae46b" id="r_gab1ab1fd14748d27abd7862942b5ae46b"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__l4util__bitops.html#gab1ab1fd14748d27abd7862942b5ae46b">l4util_clear_bit</a> (int b, volatile <a class="el" href="group__l4__basic__types.html#ga1c2c4b333f75b1d05b59855910f2b9cb">l4_umword_t</a> *dest)</td></tr>
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<tr class="memdesc:gab1ab1fd14748d27abd7862942b5ae46b"><td class="mdescLeft"> </td><td class="mdescRight">Clear bit in memory. <br /></td></tr>
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<tr class="memitem:gaf84c2a88f1ff6e02fd813a5c8c8210ea" id="r_gaf84c2a88f1ff6e02fd813a5c8c8210ea"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__l4util__bitops.html#gaf84c2a88f1ff6e02fd813a5c8c8210ea">l4util_complement_bit</a> (int b, volatile <a class="el" href="group__l4__basic__types.html#ga1c2c4b333f75b1d05b59855910f2b9cb">l4_umword_t</a> *dest)</td></tr>
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<tr class="memdesc:gaf84c2a88f1ff6e02fd813a5c8c8210ea"><td class="mdescLeft"> </td><td class="mdescRight">Complement bit in memory. <br /></td></tr>
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<tr class="memitem:gab7c484d395cb55509f16ad13adff2e92" id="r_gab7c484d395cb55509f16ad13adff2e92"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__l4util__bitops.html#gab7c484d395cb55509f16ad13adff2e92">l4util_test_bit</a> (int b, const volatile <a class="el" href="group__l4__basic__types.html#ga1c2c4b333f75b1d05b59855910f2b9cb">l4_umword_t</a> *dest)</td></tr>
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<tr class="memdesc:gab7c484d395cb55509f16ad13adff2e92"><td class="mdescLeft"> </td><td class="mdescRight">Test bit (return value of bit). <br /></td></tr>
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<tr class="memitem:gaa19a970e0ccba655837ac519d5adfdf0" id="r_gaa19a970e0ccba655837ac519d5adfdf0"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__l4util__bitops.html#gaa19a970e0ccba655837ac519d5adfdf0">l4util_bts</a> (int b, volatile <a class="el" href="group__l4__basic__types.html#ga1c2c4b333f75b1d05b59855910f2b9cb">l4_umword_t</a> *dest)</td></tr>
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<tr class="memdesc:gaa19a970e0ccba655837ac519d5adfdf0"><td class="mdescLeft"> </td><td class="mdescRight">Bit test and set. <br /></td></tr>
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<tr class="memitem:ga54de534dc4cb8daba99590f38edfd12c" id="r_ga54de534dc4cb8daba99590f38edfd12c"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__l4util__bitops.html#ga54de534dc4cb8daba99590f38edfd12c">l4util_btr</a> (int b, volatile <a class="el" href="group__l4__basic__types.html#ga1c2c4b333f75b1d05b59855910f2b9cb">l4_umword_t</a> *dest)</td></tr>
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<tr class="memdesc:ga54de534dc4cb8daba99590f38edfd12c"><td class="mdescLeft"> </td><td class="mdescRight">Bit test and reset. <br /></td></tr>
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<tr class="memitem:ga473ec530a3eb2d06a2d13a9df3184229" id="r_ga473ec530a3eb2d06a2d13a9df3184229"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__l4util__bitops.html#ga473ec530a3eb2d06a2d13a9df3184229">l4util_btc</a> (int b, volatile <a class="el" href="group__l4__basic__types.html#ga1c2c4b333f75b1d05b59855910f2b9cb">l4_umword_t</a> *dest)</td></tr>
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<tr class="memdesc:ga473ec530a3eb2d06a2d13a9df3184229"><td class="mdescLeft"> </td><td class="mdescRight">Bit test and complement. <br /></td></tr>
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<tr class="memitem:ga530be11fa91000db4c4539558e115bd2" id="r_ga530be11fa91000db4c4539558e115bd2"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__l4util__bitops.html#ga530be11fa91000db4c4539558e115bd2">l4util_bsr</a> (<a class="el" href="group__l4__basic__types.html#ga1c2c4b333f75b1d05b59855910f2b9cb">l4_umword_t</a> word)</td></tr>
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<tr class="memdesc:ga530be11fa91000db4c4539558e115bd2"><td class="mdescLeft"> </td><td class="mdescRight">Bit scan reverse. <br /></td></tr>
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<tr class="memitem:ga3906818d29569abd0c82fc7ec35687f7" id="r_ga3906818d29569abd0c82fc7ec35687f7"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__l4util__bitops.html#ga3906818d29569abd0c82fc7ec35687f7">l4util_bsf</a> (<a class="el" href="group__l4__basic__types.html#ga1c2c4b333f75b1d05b59855910f2b9cb">l4_umword_t</a> word)</td></tr>
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<tr class="memdesc:ga3906818d29569abd0c82fc7ec35687f7"><td class="mdescLeft"> </td><td class="mdescRight">Bit scan forward. <br /></td></tr>
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<tr class="memitem:ga6372526aa85a7f0d425ab706aa5e29d0" id="r_ga6372526aa85a7f0d425ab706aa5e29d0"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__l4util__bitops.html#ga6372526aa85a7f0d425ab706aa5e29d0">l4util_find_first_set_bit</a> (const void *dest, <a class="el" href="group__l4__basic__types.html#ga08c1e83a068ded7add134b188cd44967">l4_size_t</a> size)</td></tr>
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<tr class="memdesc:ga6372526aa85a7f0d425ab706aa5e29d0"><td class="mdescLeft"> </td><td class="mdescRight">Find the first set bit in a memory region. <br /></td></tr>
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<tr class="memitem:gaac1a9ad2db5efada47175656682e0eb7" id="r_gaac1a9ad2db5efada47175656682e0eb7"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__l4util__bitops.html#gaac1a9ad2db5efada47175656682e0eb7">l4util_find_first_zero_bit</a> (const void *dest, <a class="el" href="group__l4__basic__types.html#ga08c1e83a068ded7add134b188cd44967">l4_size_t</a> size)</td></tr>
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<tr class="memdesc:gaac1a9ad2db5efada47175656682e0eb7"><td class="mdescLeft"> </td><td class="mdescRight">Find the first zero bit in a memory region. <br /></td></tr>
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<tr class="memitem:ga30375b2869622616b5b5957261e9cb64" id="r_ga30375b2869622616b5b5957261e9cb64"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__l4util__bitops.html#ga30375b2869622616b5b5957261e9cb64">l4util_next_power2</a> (unsigned long val)</td></tr>
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<tr class="memdesc:ga30375b2869622616b5b5957261e9cb64"><td class="mdescLeft"> </td><td class="mdescRight">Find the next power of 2 for a given number. <br /></td></tr>
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</table>
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<a name="details" id="details"></a><h2 id="header-details" class="groupheader">Detailed Description</h2>
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<div class="textblock"><p>bit manipulation functions </p>
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<dl class="section date"><dt>Date</dt><dd>07/03/2001 </dd></dl>
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<dl class="section author"><dt>Author</dt><dd>Lars Reuther <a href="#" onclick="location.href='mai'+'lto:'+'reu'+'th'+'er@'+'os'+'.in'+'f.'+'tu-'+'dr'+'esd'+'en'+'.de'; return false;">reuth<span class="obfuscator">.nosp@m.</span>er@o<span class="obfuscator">.nosp@m.</span>s.inf<span class="obfuscator">.nosp@m.</span>.tu-<span class="obfuscator">.nosp@m.</span>dresd<span class="obfuscator">.nosp@m.</span>en.d<span class="obfuscator">.nosp@m.</span>e</a> </dd></dl>
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<p class="definition">Definition in file <a class="el" href="bitops_8h_source.html">bitops.h</a>.</p>
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<li class="navelem"><b>l4</b></li><li class="navelem"><b>util</b></li><li class="navelem"><a href="bitops_8h.html">bitops.h</a></li>
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