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<pre><a name="line-1"></a><span class='hs-comment'>{-# LINE 1 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-2"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-3"></a><span class='hs-comment'>{-# LINE 2 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-4"></a><span class='hs-comment'>-- |</span>
<a name="line-5"></a><span class='hs-comment'>-- Module : System.CPUTime</span>
<a name="line-6"></a><span class='hs-comment'>-- Copyright : (c) The University of Glasgow 2001</span>
<a name="line-7"></a><span class='hs-comment'>-- License : BSD-style (see the file libraries/base/LICENSE)</span>
<a name="line-8"></a><span class='hs-comment'>-- </span>
<a name="line-9"></a><span class='hs-comment'>-- Maintainer : libraries@haskell.org</span>
<a name="line-10"></a><span class='hs-comment'>-- Stability : provisional</span>
<a name="line-11"></a><span class='hs-comment'>-- Portability : portable</span>
<a name="line-12"></a><span class='hs-comment'>--</span>
<a name="line-13"></a><span class='hs-comment'>-- The standard CPUTime library.</span>
<a name="line-14"></a><span class='hs-comment'>--</span>
<a name="line-15"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-16"></a>
<a name="line-17"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>CPUTime</span>
<a name="line-18"></a> <span class='hs-layout'>(</span>
<a name="line-19"></a> <span class='hs-varid'>getCPUTime</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: IO Integer</span>
<a name="line-20"></a> <span class='hs-varid'>cpuTimePrecision</span> <span class='hs-comment'>-- :: Integer</span>
<a name="line-21"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-22"></a>
<a name="line-23"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Prelude</span>
<a name="line-24"></a>
<a name="line-25"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Ratio</span>
<a name="line-26"></a>
<a name="line-27"></a>
<a name="line-28"></a><span class='hs-comment'>{-# LINE 28 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-29"></a>
<a name="line-30"></a>
<a name="line-31"></a><span class='hs-comment'>{-# LINE 32 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-32"></a>
<a name="line-33"></a>
<a name="line-34"></a><span class='hs-comment'>{-# LINE 34 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-35"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span> <span class='hs-varid'>hiding</span> <span class='hs-layout'>(</span><span class='hs-varid'>unsafePerformIO</span><span class='hs-layout'>)</span>
<a name="line-36"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>C</span>
<a name="line-37"></a>
<a name="line-38"></a><span class='hs-comment'>{-# LINE 37 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-39"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Unsafe</span> <span class='hs-layout'>(</span><span class='hs-varid'>unsafePerformIO</span><span class='hs-layout'>)</span>
<a name="line-40"></a>
<a name="line-41"></a><span class='hs-comment'>{-# LINE 39 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-42"></a>
<a name="line-43"></a>
<a name="line-44"></a><span class='hs-comment'>{-# LINE 41 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-45"></a>
<a name="line-46"></a><span class='hs-comment'>-- For _SC_CLK_TCK</span>
<a name="line-47"></a>
<a name="line-48"></a><span class='hs-comment'>{-# LINE 44 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-49"></a>
<a name="line-50"></a><span class='hs-comment'>{-# LINE 45 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-51"></a>
<a name="line-52"></a><span class='hs-comment'>{-# LINE 46 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-53"></a>
<a name="line-54"></a><span class='hs-comment'>-- For struct rusage</span>
<a name="line-55"></a>
<a name="line-56"></a><span class='hs-comment'>{-# LINE 49 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-57"></a>
<a name="line-58"></a><span class='hs-comment'>{-# LINE 50 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-59"></a>
<a name="line-60"></a><span class='hs-comment'>{-# LINE 51 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-61"></a>
<a name="line-62"></a><span class='hs-comment'>{-# LINE 52 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-63"></a>
<a name="line-64"></a><span class='hs-comment'>{-# LINE 53 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-65"></a>
<a name="line-66"></a><span class='hs-comment'>-- For FILETIME etc. on Windows</span>
<a name="line-67"></a>
<a name="line-68"></a><span class='hs-comment'>{-# LINE 58 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-69"></a>
<a name="line-70"></a><span class='hs-comment'>-- for CLK_TCK</span>
<a name="line-71"></a>
<a name="line-72"></a><span class='hs-comment'>{-# LINE 61 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-73"></a>
<a name="line-74"></a><span class='hs-comment'>{-# LINE 62 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-75"></a>
<a name="line-76"></a><span class='hs-comment'>{-# LINE 63 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-77"></a>
<a name="line-78"></a><span class='hs-comment'>-- for struct tms</span>
<a name="line-79"></a>
<a name="line-80"></a><span class='hs-comment'>{-# LINE 66 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-81"></a>
<a name="line-82"></a><span class='hs-comment'>{-# LINE 67 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-83"></a>
<a name="line-84"></a><span class='hs-comment'>{-# LINE 68 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-85"></a>
<a name="line-86"></a>
<a name="line-87"></a><span class='hs-comment'>{-# LINE 70 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-88"></a>
<a name="line-89"></a>
<a name="line-90"></a><a name="realToInteger"></a><span class='hs-comment'>{-# LINE 72 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-91"></a><span class='hs-definition'>realToInteger</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Real</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Integer</span>
<a name="line-92"></a><span class='hs-definition'>realToInteger</span> <span class='hs-varid'>ct</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>round</span> <span class='hs-layout'>(</span><span class='hs-varid'>realToFrac</span> <span class='hs-varid'>ct</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Double</span><span class='hs-layout'>)</span>
<a name="line-93"></a> <span class='hs-comment'>-- CTime, CClock, CUShort etc are in Real but not Fractional, </span>
<a name="line-94"></a> <span class='hs-comment'>-- so we must convert to Double before we can round it</span>
<a name="line-95"></a>
<a name="line-96"></a><span class='hs-comment'>{-# LINE 77 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-97"></a>
<a name="line-98"></a>
<a name="line-99"></a><span class='hs-comment'>{-# LINE 79 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-100"></a><span class='hs-comment'>-- -----------------------------------------------------------------------------</span>
<a name="line-101"></a><span class='hs-comment'>-- |Computation 'getCPUTime' returns the number of picoseconds CPU time</span>
<a name="line-102"></a><span class='hs-comment'>-- used by the current program. The precision of this result is</span>
<a name="line-103"></a><span class='hs-comment'>-- implementation-dependent.</span>
<a name="line-104"></a>
<a name="line-105"></a><a name="getCPUTime"></a><span class='hs-definition'>getCPUTime</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Integer</span>
<a name="line-106"></a><span class='hs-definition'>getCPUTime</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-107"></a>
<a name="line-108"></a>
<a name="line-109"></a><span class='hs-comment'>{-# LINE 88 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-110"></a><span class='hs-comment'>-- getrusage() is right royal pain to deal with when targetting multiple</span>
<a name="line-111"></a><span class='hs-comment'>-- versions of Solaris, since some versions supply it in libc (2.3 and 2.5),</span>
<a name="line-112"></a><span class='hs-comment'>-- while 2.4 has got it in libucb (I wouldn't be too surprised if it was back</span>
<a name="line-113"></a><span class='hs-comment'>-- again in libucb in 2.6..)</span>
<a name="line-114"></a><span class='hs-comment'>--</span>
<a name="line-115"></a><span class='hs-comment'>-- Avoid the problem by resorting to times() instead.</span>
<a name="line-116"></a><span class='hs-comment'>--</span>
<a name="line-117"></a>
<a name="line-118"></a><span class='hs-comment'>{-# LINE 96 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-119"></a> <span class='hs-varid'>allocaBytes</span> <span class='hs-layout'>(</span><span class='hs-num'>72</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>p_rusage</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-120"></a><span class='hs-comment'>{-# LINE 97 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-121"></a> <span class='hs-varid'>throwErrnoIfMinus1_</span> <span class='hs-str'>"getrusage"</span> <span class='hs-varop'>$</span> <span class='hs-varid'>getrusage</span> <span class='hs-layout'>(</span><span class='hs-num'>0</span><span class='hs-layout'>)</span> <span class='hs-varid'>p_rusage</span>
<a name="line-122"></a><span class='hs-comment'>{-# LINE 98 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-123"></a>
<a name="line-124"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>ru_utime</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'>hsc_ptr</span> <span class='hs-varop'>`plusPtr`</span> <span class='hs-num'>0</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>p_rusage</span>
<a name="line-125"></a><span class='hs-comment'>{-# LINE 100 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-126"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>ru_stime</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'>hsc_ptr</span> <span class='hs-varop'>`plusPtr`</span> <span class='hs-num'>8</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>p_rusage</span>
<a name="line-127"></a><span class='hs-comment'>{-# LINE 101 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-128"></a> <span class='hs-varid'>u_sec</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'>ru_utime</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CTime</span>
<a name="line-129"></a><span class='hs-comment'>{-# LINE 102 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-130"></a> <span class='hs-varid'>u_usec</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'>4</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>ru_utime</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CTime</span>
<a name="line-131"></a><span class='hs-comment'>{-# LINE 103 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-132"></a> <span class='hs-varid'>s_sec</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'>ru_stime</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CTime</span>
<a name="line-133"></a><span class='hs-comment'>{-# LINE 104 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-134"></a> <span class='hs-varid'>s_usec</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'>4</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>ru_stime</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CTime</span>
<a name="line-135"></a><span class='hs-comment'>{-# LINE 105 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-136"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>realToInteger</span> <span class='hs-varid'>u_sec</span> <span class='hs-varop'>*</span> <span class='hs-num'>1000000</span> <span class='hs-varop'>+</span> <span class='hs-varid'>realToInteger</span> <span class='hs-varid'>u_usec</span> <span class='hs-varop'>+</span>
<a name="line-137"></a> <span class='hs-varid'>realToInteger</span> <span class='hs-varid'>s_sec</span> <span class='hs-varop'>*</span> <span class='hs-num'>1000000</span> <span class='hs-varop'>+</span> <span class='hs-varid'>realToInteger</span> <span class='hs-varid'>s_usec</span><span class='hs-layout'>)</span>
<a name="line-138"></a> <span class='hs-varop'>*</span> <span class='hs-num'>1000000</span><span class='hs-layout'>)</span>
<a name="line-139"></a>
<a name="line-140"></a><a name="CRUsage"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>CRUsage</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>()</span>
<a name="line-141"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-keyword'>unsafe</span> <span class='hs-varid'>getrusage</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>CRUsage</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-142"></a>
<a name="line-143"></a><span class='hs-comment'>{-# LINE 129 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-144"></a>
<a name="line-145"></a>
<a name="line-146"></a><span class='hs-comment'>{-# LINE 163 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-147"></a>
<a name="line-148"></a><span class='hs-comment'>{-# LINE 164 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-149"></a>
<a name="line-150"></a><span class='hs-comment'>-- |The 'cpuTimePrecision' constant is the smallest measurable difference</span>
<a name="line-151"></a><span class='hs-comment'>-- in CPU time that the implementation can record, and is given as an</span>
<a name="line-152"></a><span class='hs-comment'>-- integral number of picoseconds.</span>
<a name="line-153"></a>
<a name="line-154"></a>
<a name="line-155"></a><a name="cpuTimePrecision"></a><span class='hs-comment'>{-# LINE 170 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-156"></a><span class='hs-definition'>cpuTimePrecision</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Integer</span>
<a name="line-157"></a><span class='hs-definition'>cpuTimePrecision</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>round</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-num'>1000000000000</span><span class='hs-keyglyph'>::</span><span class='hs-conid'>Integer</span><span class='hs-layout'>)</span> <span class='hs-varop'>%</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-layout'>(</span><span class='hs-varid'>clockTicks</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-158"></a>
<a name="line-159"></a><span class='hs-comment'>{-# LINE 173 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-160"></a>
<a name="line-161"></a>
<a name="line-162"></a><a name="clockTicks"></a><span class='hs-comment'>{-# LINE 175 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-163"></a><span class='hs-definition'>clockTicks</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span>
<a name="line-164"></a><span class='hs-definition'>clockTicks</span> <span class='hs-keyglyph'>=</span>
<a name="line-165"></a>
<a name="line-166"></a><span class='hs-comment'>{-# LINE 180 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-167"></a> <span class='hs-varid'>unsafePerformIO</span> <span class='hs-layout'>(</span><span class='hs-varid'>sysconf</span> <span class='hs-layout'>(</span><span class='hs-num'>2</span><span class='hs-layout'>)</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fromIntegral</span><span class='hs-layout'>)</span>
<a name="line-168"></a><span class='hs-comment'>{-# LINE 181 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-169"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-keyword'>unsafe</span> <span class='hs-varid'>sysconf</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CLong</span>
<a name="line-170"></a>
<a name="line-171"></a><span class='hs-comment'>{-# LINE 183 "libraries/base/./System/CPUTime.hsc" #-}</span>
<a name="line-172"></a>
<a name="line-173"></a><span class='hs-comment'>{-# LINE 184 "libraries/base/./System/CPUTime.hsc" #-}</span>
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