[libmicrohttpd] 04/09: test_upgrade: use 'volatile' for variable with multithread access

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karlson2k pushed a commit to branch master
in repository libmicrohttpd.

commit 8c4f7ce1ea84a2d2bf5aca6b09d98af4ecb71f61
Author: Evgeny Grin (Karlson2k) <k2k@narod.ru>
AuthorDate: Sat Jan 15 15:33:42 2022 +0300

    test_upgrade: use 'volatile' for variable with multithread access
---
 src/microhttpd/test_upgrade.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/microhttpd/test_upgrade.c b/src/microhttpd/test_upgrade.c
index 81a36004..d2e0e536 100644
--- a/src/microhttpd/test_upgrade.c
+++ b/src/microhttpd/test_upgrade.c
@@ -572,7 +572,7 @@ static pthread_t pt;
 /**
  * Will be set to the upgraded socket.
  */
-static struct wr_socket *usock;
+static struct wr_socket *volatile usock;
 
 /**
  * Thread we use to run the interaction with the upgraded socket.

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