commit 6f2e733bab69a5c853a929a96671736458b8d4c1
author Adam Langley <alangley@gmail.com> Fri May 15 12:01:29 2015 -0700
committer Adam Langley <agl@google.com> Wed May 20 19:14:59 2015 +0000
tree efbff366b0b384afc15bc85a6d52868ea8f43078
parent daaff93464f79b9f1f06cac39d56125892280ee9

Add infrastructure for reference counts.

OpenSSL has traditionally done reference counting with |int|s and the
|CRYPTO_add| function. Unless a special callback is installed (rare),
this is implemented by doing the reference count operations under a
lock.

This change adds infrastructure for handling reference counts and uses
atomic operations when C11 support is available.

Change-Id: Ia023ce432319efd00f77a7340da27d16ee4b63c3
Reviewed-on: https://boringssl-review.googlesource.com/4771
Reviewed-by: Adam Langley <agl@google.com>

crypto/CMakeLists.txt

diff --git a/crypto/CMakeLists.txt b/crypto/CMakeLists.txt
index 6433dc6..7430b62 100644
--- a/crypto/CMakeLists.txt
+++ b/crypto/CMakeLists.txt
@@ -145,15 +145,17 @@
   crypto
 
   crypto.c
+  directory_posix.c
+  directory_win.c
+  ex_data.c
   mem.c
+  refcount_c11.c
+  refcount_lock.c
   thread.c
   thread_none.c
   thread_pthread.c
   thread_win.c
-  ex_data.c
   time_support.c
-  directory_posix.c
-  directory_win.c
 
   ${CRYPTO_ARCH_SOURCES}
 
@@ -217,5 +219,13 @@
 
 target_link_libraries(thread_test crypto)
 
+add_executable(
+  refcount_test
+
+  refcount_test.c
+)
+
+target_link_libraries(refcount_test crypto)
+
 perlasm(cpu-x86_64-asm.${ASM_EXT} cpu-x86_64-asm.pl)
 perlasm(cpu-x86-asm.${ASM_EXT} cpu-x86-asm.pl)