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From 60cb8e07b17ad8533d7d13f52435aa11e48f4659 Mon Sep 17 00:00:00 2001
From: Dimitry Sibiryakov <sd@ibphoenix.com>
Date: Tue, 12 Nov 2019 13:42:49 +0100
Subject: [PATCH] Fix warning on Win64 build (#231)

---
 src/common/ThreadStart.cpp | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/src/common/ThreadStart.cpp b/src/common/ThreadStart.cpp
index 184c93a32b..758056432f 100644
--- a/src/common/ThreadStart.cpp
+++ b/src/common/ThreadStart.cpp
@@ -309,13 +309,16 @@ Thread Thread::start(ThreadEntryPoint* routine, void* arg, int priority_arg, Han
 	 * Advanced Windows by Richter pg. # 109. */
 
 	unsigned thread_id;
-	unsigned long real_handle =
-		_beginthreadex(NULL, 0, THREAD_ENTRYPOINT, THREAD_ARG, CREATE_SUSPENDED, &thread_id);
-	if (!real_handle)
+	HANDLE handle =
+		reinterpret_cast<HANDLE>(_beginthreadex(NULL, 0, THREAD_ENTRYPOINT, THREAD_ARG, CREATE_SUSPENDED, &thread_id));
+	if (!handle)
 	{
+		// Though MSDN says that _beginthreadex() returns error in errno,
+		// GetLastError() still works because RTL call no other system
+		// functions after CreateThread() in the case of error.
+		// Watch out if it is ever changed.
 		Firebird::system_call_failed::raise("_beginthreadex", GetLastError());
 	}
-	HANDLE handle = reinterpret_cast<HANDLE>(real_handle);
 
 	SetThreadPriority(handle, priority);
 
-- 
2.20.1