+BN_MONT_CTX *BN_MONT_CTX_set_locked(BN_MONT_CTX **pmont, int lock,
+ const BIGNUM *mod, BN_CTX *ctx)
+ {
+ if (*pmont)
+ return *pmont;
+ CRYPTO_w_lock(lock);
+ if (!*pmont)
+ {
+ *pmont = BN_MONT_CTX_new();
+ if (*pmont && !BN_MONT_CTX_set(*pmont, mod, ctx))
+ {
+ BN_MONT_CTX_free(*pmont);
+ *pmont = NULL;
+ }
+ }
+ CRYPTO_w_unlock(lock);
+ return *pmont;
+ }