Provide a thread stop API

Add the OPENSSL_INIT_thread_stop() function.
Reviewed-by: NRichard Levitte <levitte@openssl.org>

crypto/cryptlib.c

@@ -234,8 +234,7 @@ BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
     case DLL_THREAD_ATTACH:
         break;
     case DLL_THREAD_DETACH:
-        ossl_init_thread_stop(
-            (struct thread_local_inits_st *)ossl_init_get_thread_local(0));
+        OPENSSL_INIT_thread_stop();
         break;
     case DLL_PROCESS_DETACH:
         break;

crypto/include/internal/cryptlib_int.h

@@ -65,7 +65,6 @@ struct thread_local_inits_st {
 };
 void *ossl_init_get_thread_local(int alloc);
 int ossl_init_thread_start(uint64_t opts);
-void ossl_init_thread_stop(struct thread_local_inits_st *locals);
 /*
  * OPENSSL_INIT flags. The primary list of these is in crypto.h. Flags below
  * are those ommitted from crypto.h because they are "reserverd for internal

crypto/init.c

@@ -77,6 +77,8 @@
 #include <internal/err.h>
 #include <stdlib.h>
 
+static void ossl_init_thread_stop(struct thread_local_inits_st *locals);
+
 /* Implement "once" functionality */
 #if !defined(OPENSSL_THREADS)
 typedef int OPENSSL_INIT_ONCE;
@@ -466,7 +468,7 @@ static void ossl_init_zlib(void)
     zlib_inited = 1;
 }
 
-void ossl_init_thread_stop(struct thread_local_inits_st *locals)
+static void ossl_init_thread_stop(struct thread_local_inits_st *locals)
 {
     /* Can't do much about this */
     if (locals == NULL)
@@ -492,6 +494,12 @@ void ossl_init_thread_stop(struct thread_local_inits_st *locals)
     ossl_init_thread_stop_cleanup();
 }
 
+void OPENSSL_INIT_thread_stop(void)
+{
+    ossl_init_thread_stop(
+        (struct thread_local_inits_st *)ossl_init_get_thread_local(0));
+}
+
 int ossl_init_thread_start(uint64_t opts)
 {
     struct thread_local_inits_st *locals = ossl_init_get_thread_local(1);

include/openssl/crypto.h

@@ -601,6 +601,7 @@ void OPENSSL_INIT_library_stop(void);
 void OPENSSL_INIT_crypto_library_start(uint64_t opts,
                                        const OPENSSL_INIT_SETTINGS *settings);
 int OPENSSL_INIT_register_stop_handler(void (*handler)(void));
+void OPENSSL_INIT_thread_stop(void);
 
 /* BEGIN ERROR CODES */
 /*