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<pre><a name="line-1"></a><span class='hs-comment'>{-# LINE 1 "Network/Socket/ByteString/MsgHdr.hsc" #-}</span>
<a name="line-2"></a><span class='hs-comment'>{-# LANGUAGE CPP #-}</span>
<a name="line-3"></a><span class='hs-comment'>{-# LINE 2 "Network/Socket/ByteString/MsgHdr.hsc" #-}</span>
<a name="line-4"></a><span class='hs-comment'>{-# OPTIONS_GHC -funbox-strict-fields #-}</span>
<a name="line-5"></a>
<a name="line-6"></a><span class='hs-comment'>-- | Support module for the POSIX 'sendmsg' system call.</span>
<a name="line-7"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Network</span><span class='hs-varop'>.</span><span class='hs-conid'>Socket</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-varop'>.</span><span class='hs-conid'>MsgHdr</span>
<a name="line-8"></a> <span class='hs-layout'>(</span> <span class='hs-conid'>MsgHdr</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-9"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-10"></a>
<a name="line-11"></a>
<a name="line-12"></a><span class='hs-comment'>{-# LINE 10 "Network/Socket/ByteString/MsgHdr.hsc" #-}</span>
<a name="line-13"></a>
<a name="line-14"></a><span class='hs-comment'>{-# LINE 11 "Network/Socket/ByteString/MsgHdr.hsc" #-}</span>
<a name="line-15"></a>
<a name="line-16"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Types</span> <span class='hs-layout'>(</span><span class='hs-conid'>CInt</span><span class='hs-layout'>,</span> <span class='hs-conid'>CSize</span><span class='hs-layout'>,</span> <span class='hs-conid'>CUInt</span><span class='hs-layout'>)</span>
<a name="line-17"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>Ptr</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span><span class='hs-layout'>)</span>
<a name="line-18"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>Storable</span> <span class='hs-layout'>(</span><span class='hs-conid'>Storable</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-19"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Network</span><span class='hs-varop'>.</span><span class='hs-conid'>Socket</span> <span class='hs-layout'>(</span><span class='hs-conid'>SockAddr</span><span class='hs-layout'>)</span>
<a name="line-20"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Network</span><span class='hs-varop'>.</span><span class='hs-conid'>Socket</span><span class='hs-varop'>.</span><span class='hs-conid'>Internal</span> <span class='hs-layout'>(</span><span class='hs-varid'>zeroMemory</span><span class='hs-layout'>)</span>
<a name="line-21"></a>
<a name="line-22"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Network</span><span class='hs-varop'>.</span><span class='hs-conid'>Socket</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-varop'>.</span><span class='hs-conid'>IOVec</span> <span class='hs-layout'>(</span><span class='hs-conid'>IOVec</span><span class='hs-layout'>)</span>
<a name="line-23"></a>
<a name="line-24"></a><a name="MsgHdr"></a><span class='hs-comment'>-- We don't use msg_control, msg_controllen, and msg_flags as these</span>
<a name="line-25"></a><a name="MsgHdr"></a><span class='hs-comment'>-- don't exist on OpenSolaris.</span>
<a name="line-26"></a><a name="MsgHdr"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>MsgHdr</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>MsgHdr</span>
<a name="line-27"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>msgName</span> <span class='hs-keyglyph'>::</span> <span class='hs-varop'>!</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>SockAddr</span><span class='hs-layout'>)</span>
<a name="line-28"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>msgNameLen</span> <span class='hs-keyglyph'>::</span> <span class='hs-varop'>!</span><span class='hs-conid'>CUInt</span>
<a name="line-29"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>msgIov</span> <span class='hs-keyglyph'>::</span> <span class='hs-varop'>!</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>IOVec</span><span class='hs-layout'>)</span>
<a name="line-30"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>msgIovLen</span> <span class='hs-keyglyph'>::</span> <span class='hs-varop'>!</span><span class='hs-conid'>CSize</span>
<a name="line-31"></a> <span class='hs-layout'>}</span>
<a name="line-32"></a>
<a name="line-33"></a><a name="instance%20Storable%20MsgHdr"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Storable</span> <span class='hs-conid'>MsgHdr</span> <span class='hs-keyword'>where</span>
<a name="line-34"></a> <span class='hs-varid'>sizeOf</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-num'>56</span><span class='hs-layout'>)</span>
<a name="line-35"></a><span class='hs-comment'>{-# LINE 31 "Network/Socket/ByteString/MsgHdr.hsc" #-}</span>
<a name="line-36"></a> <span class='hs-varid'>alignment</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>alignment</span> <span class='hs-layout'>(</span><span class='hs-varid'>undefined</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CInt</span><span class='hs-layout'>)</span>
<a name="line-37"></a>
<a name="line-38"></a> <span class='hs-varid'>peek</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-39"></a> <span class='hs-varid'>name</span> <span class='hs-keyglyph'><-</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>hsc_ptr</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>peekByteOff</span> <span class='hs-varid'>hsc_ptr</span> <span class='hs-num'>0</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>p</span>
<a name="line-40"></a><span class='hs-comment'>{-# LINE 35 "Network/Socket/ByteString/MsgHdr.hsc" #-}</span>
<a name="line-41"></a> <span class='hs-varid'>nameLen</span> <span class='hs-keyglyph'><-</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>hsc_ptr</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>peekByteOff</span> <span class='hs-varid'>hsc_ptr</span> <span class='hs-num'>8</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>p</span>
<a name="line-42"></a><span class='hs-comment'>{-# LINE 36 "Network/Socket/ByteString/MsgHdr.hsc" #-}</span>
<a name="line-43"></a> <span class='hs-varid'>iov</span> <span class='hs-keyglyph'><-</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>hsc_ptr</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>peekByteOff</span> <span class='hs-varid'>hsc_ptr</span> <span class='hs-num'>16</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>p</span>
<a name="line-44"></a><span class='hs-comment'>{-# LINE 37 "Network/Socket/ByteString/MsgHdr.hsc" #-}</span>
<a name="line-45"></a> <span class='hs-varid'>iovLen</span> <span class='hs-keyglyph'><-</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>hsc_ptr</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>peekByteOff</span> <span class='hs-varid'>hsc_ptr</span> <span class='hs-num'>24</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>p</span>
<a name="line-46"></a><span class='hs-comment'>{-# LINE 38 "Network/Socket/ByteString/MsgHdr.hsc" #-}</span>
<a name="line-47"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>MsgHdr</span> <span class='hs-varid'>name</span> <span class='hs-varid'>nameLen</span> <span class='hs-varid'>iov</span> <span class='hs-varid'>iovLen</span>
<a name="line-48"></a>
<a name="line-49"></a> <span class='hs-varid'>poke</span> <span class='hs-varid'>p</span> <span class='hs-varid'>mh</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-50"></a> <span class='hs-comment'>-- We need to zero the msg_control, msg_controllen, and msg_flags</span>
<a name="line-51"></a> <span class='hs-comment'>-- fields, but they only exist on some platforms (e.g. not on</span>
<a name="line-52"></a> <span class='hs-comment'>-- Solaris). Instead of using CPP, we zero the entire struct.</span>
<a name="line-53"></a> <span class='hs-varid'>zeroMemory</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-num'>56</span><span class='hs-layout'>)</span>
<a name="line-54"></a><span class='hs-comment'>{-# LINE 45 "Network/Socket/ByteString/MsgHdr.hsc" #-}</span>
<a name="line-55"></a> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>hsc_ptr</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>pokeByteOff</span> <span class='hs-varid'>hsc_ptr</span> <span class='hs-num'>0</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-varid'>msgName</span> <span class='hs-varid'>mh</span><span class='hs-layout'>)</span>
<a name="line-56"></a><span class='hs-comment'>{-# LINE 46 "Network/Socket/ByteString/MsgHdr.hsc" #-}</span>
<a name="line-57"></a> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>hsc_ptr</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>pokeByteOff</span> <span class='hs-varid'>hsc_ptr</span> <span class='hs-num'>8</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-varid'>msgNameLen</span> <span class='hs-varid'>mh</span><span class='hs-layout'>)</span>
<a name="line-58"></a><span class='hs-comment'>{-# LINE 47 "Network/Socket/ByteString/MsgHdr.hsc" #-}</span>
<a name="line-59"></a> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>hsc_ptr</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>pokeByteOff</span> <span class='hs-varid'>hsc_ptr</span> <span class='hs-num'>16</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-varid'>msgIov</span> <span class='hs-varid'>mh</span><span class='hs-layout'>)</span>
<a name="line-60"></a><span class='hs-comment'>{-# LINE 48 "Network/Socket/ByteString/MsgHdr.hsc" #-}</span>
<a name="line-61"></a> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>hsc_ptr</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>pokeByteOff</span> <span class='hs-varid'>hsc_ptr</span> <span class='hs-num'>24</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-varid'>msgIovLen</span> <span class='hs-varid'>mh</span><span class='hs-layout'>)</span>
<a name="line-62"></a><span class='hs-comment'>{-# LINE 49 "Network/Socket/ByteString/MsgHdr.hsc" #-}</span>
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