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easy_lock: add a pthread_mutex_t fallback

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

Closes https://github.com/curl/curl/pull/12090
This commit is contained in:
Loïc Yhuel 2023-10-11 13:07:48 +02:00 • committed by Jay Satiro
parent 2e283c69e0
commit 5adb6000ff
1 changed files with 9 additions and 0 deletions
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9
lib/easy_lock.h
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@ -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