| Index: runtime/vm/os_thread_macos.cc
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| diff --git a/runtime/vm/os_thread_macos.cc b/runtime/vm/os_thread_macos.cc
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| index 6a9aca22cd58317ef9b058668dc4fc72f2d8b9d9..bcac82829670b1f7970c1c8cfc92941a1955a131 100644
 | 
| --- a/runtime/vm/os_thread_macos.cc
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| +++ b/runtime/vm/os_thread_macos.cc
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| @@ -162,6 +162,11 @@ intptr_t OSThread::ThreadIdToIntPtr(ThreadId id) {
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|  }
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|  
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|  
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| +ThreadId OSThread::ThreadIdFromIntPtr(intptr_t id) {
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| +  return reinterpret_cast<ThreadId>(id);
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| +}
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| +
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| +
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|  bool OSThread::Compare(ThreadId a, ThreadId b) {
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|    return pthread_equal(a, b) != 0;
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|  }
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| 
 |