X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fthreads_pthread.c;h=9644c25aea947acbfba6ef7f8bc71601d4e3be9d;hp=f7c792123bc0748a8c672a944ae1385a329deb9b;hb=b842fcbb37cf3cded72dd7706abd8d54a10cd508;hpb=2915fe19a6676374c335d8c50eaaa4c940cf47d6

diff --git a/crypto/threads_pthread.c b/crypto/threads_pthread.c
index f7c792123b..9644c25aea 100644
--- a/crypto/threads_pthread.c
+++ b/crypto/threads_pthread.c
@@ -8,7 +8,7 @@
  */
 
 #include <openssl/crypto.h>
-#include <internal/cryptlib.h>
+#include "internal/cryptlib.h"
 
 #if defined(OPENSSL_THREADS) && !defined(CRYPTO_TDEBUG) && !defined(OPENSSL_SYS_WINDOWS)
 
@@ -169,11 +169,20 @@ int CRYPTO_atomic_add(int *val, int amount, int *ret, CRYPTO_RWLOCK *lock)
     return 1;
 }
 
+# ifdef OPENSSL_SYS_UNIX
+static pthread_once_t fork_once_control = PTHREAD_ONCE_INIT;
+
+static void fork_once_func(void)
+{
+    pthread_atfork(OPENSSL_fork_prepare,
+                   OPENSSL_fork_parent, OPENSSL_fork_child);
+}
+# endif
+
 int openssl_init_fork_handlers(void)
 {
 # ifdef OPENSSL_SYS_UNIX
-    if (pthread_atfork(OPENSSL_fork_prepare,
-                       OPENSSL_fork_parent, OPENSSL_fork_child) == 0)
+    if (pthread_once(&fork_once_control, fork_once_func) == 0)
         return 1;
 # endif
     return 0;