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<h3>
Marge Bot pushed to branch master
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
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<h4>
Commits:
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<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/1b975aedb1b74b8694d14ba8fdc5955497f8f31c">1b975aed</a></strong>
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<span>by Andrew Martin</span>
<i>at 2020-06-04T04:36:03-04:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Allow finalizeForeignPtr to be called on FinalPtr/PlainPtr.
MR 2165 (commit 49301ad6226d9a83d110bee8c419615dd94f5ded) regressed
finalizeForeignPtr by throwing exceptions when PlainPtr was encounterd.
This regression did not make it into a release of GHC. Here, the
original behavior is restored, and FinalPtr is given the same treatment
as PlainPtr.
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<h4>1 changed file:</h4>
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<a href="#269448746b2d7046ede74979e927b8642db7271f">
libraries/base/GHC/ForeignPtr.hs
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<h4>Changes:</h4>
<li id="269448746b2d7046ede74979e927b8642db7271f">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/1b975aedb1b74b8694d14ba8fdc5955497f8f31c#269448746b2d7046ede74979e927b8642db7271f"><strong>libraries/base/GHC/ForeignPtr.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -572,12 +572,14 @@ plusForeignPtr (ForeignPtr addr c) (I# d) = ForeignPtr (plusAddr# addr d) c</td>
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572
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<pre style="margin: 0;"> <span id="LC572" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC573" class="line" lang="haskell"><span class="cd">-- | Causes the finalizers associated with a foreign pointer to be run</span></span>
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574
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<pre style="margin: 0;"> <span id="LC574" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- immediately. The foreign pointer must not be used again after this</span></span>
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<pre style="margin: 0;">-<span id="LC575" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- function is called.</span></span>
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<pre style="margin: 0;">+<span id="LC575" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- function is called. If the foreign pointer does not support finalizers,</span></span>
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<pre style="margin: 0;">+<span id="LC576" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- this is a no-op.</span></span>
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<pre style="margin: 0;"> <span id="LC577" class="line" lang="haskell"><span class="n" style="color: #333;">finalizeForeignPtr</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">ForeignPtr</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;"> <span id="LC578" class="line" lang="haskell"><span class="n" style="color: #333;">finalizeForeignPtr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ForeignPtr</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">c</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">c</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;"> <span id="LC579" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">PlainForeignPtr</span> <span class="n" style="color: #333;">ref</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">foreignPtrFinalizer</span> <span class="n" style="color: #333;">ref</span></span>
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<pre style="margin: 0;"> <span id="LC580" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MallocPtr</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">ref</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">foreignPtrFinalizer</span> <span class="n" style="color: #333;">ref</span></span>
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<pre style="margin: 0;">-<span id="LC580" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">errorWithoutStackTrace</span> <span class="s" style="color: #d14;">"finalizeForeignPtr PlainPtr"</span></span>
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<pre style="margin: 0;">+<span id="LC581" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">PlainPtr</span><span class="p">{}</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">return</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC582" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">FinalPtr</span><span class="p">{}</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">return</span> <span class="nb" style="color: #0086b3;">()</span></span>
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583
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<pre style="margin: 0;"> <span id="LC583" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC584" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- $commentary</span></span>
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583
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<pre style="margin: 0;"> <span id="LC585" class="line" lang="haskell"></span>
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