Add |BIO_up_ref| and |EVP_PKEY_up_ref|.

This avoids callers having to worry about |CRYPTO_add| and what the
correct lock to use it with is. (Esp since we'll probably change the way
that reference counts work in the future.)

Change-Id: I972bf0cc3be6099e0255e64a0fd50249062d1eb4
Reviewed-on: https://boringssl-review.googlesource.com/4623
Reviewed-by: Adam Langley <agl@google.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/crypto/bio/bio.c b/crypto/bio/bio.c
index 2fcad6cc..48c1466d 100644
--- a/crypto/bio/bio.c
+++ b/crypto/bio/bio.c
@@ -126,6 +126,11 @@ int BIO_free(BIO *bio) {
   return 1;
 }
 
+BIO *BIO_up_ref(BIO *bio) {
+  CRYPTO_add(&bio->references, 1, CRYPTO_LOCK_BIO);
+  return bio;
+}
+
 void BIO_vfree(BIO *bio) {
   BIO_free(bio);
 }