From: Loïc Yhuel <loic.yhuel@softathome.com>
Date: Wed, 11 Oct 2023 11:07:48 +0000 (+0200)
Subject: easy_lock: add a pthread_mutex_t fallback
X-Git-Tag: curl-8_5_0~259
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=5adb6000;p=thirdparty%2Fcurl.git

easy_lock: add a pthread_mutex_t fallback

This allows to keep the init threadsafe with gcc < 4.9.0 (no C11
atomics).

Closes https://github.com/curl/curl/pull/12090
---

diff --git a/lib/easy_lock.h b/lib/easy_lock.h
index d3fffd0d2a..4f6764d427 100644
--- a/lib/easy_lock.h
+++ b/lib/easy_lock.h
@@ -93,6 +93,15 @@ static inline void curl_simple_lock_unlock(curl_simple_lock *lock)
   atomic_store_explicit(lock, false, memory_order_release);
 }
 
+#elif defined(USE_THREADS_POSIX) && defined(HAVE_PTHREAD_H)
+
+#include <pthread.h>
+
+#define curl_simple_lock pthread_mutex_t
+#define CURL_SIMPLE_LOCK_INIT PTHREAD_MUTEX_INITIALIZER
+#define curl_simple_lock_lock(m) pthread_mutex_lock(m)
+#define curl_simple_lock_unlock(m) pthread_mutex_unlock(m)
+
 #else
 
 #undef  GLOBAL_INIT_IS_THREADSAFE