diff options
| author | Benjamin Kaduk <bkaduk@akamai.com> | 2018-10-22 11:51:35 -0500 |
|---|---|---|
| committer | Benjamin Kaduk <kaduk@mit.edu> | 2018-11-03 23:27:11 -0500 |
| commit | a649b52f86a2aa039a15d9c8c0de5b6786bac0fc (patch) | |
| tree | c6b5f63d37b806470560aa941bbb1da9a1b2a44b /include | |
| parent | cd01707b7f7e71b6c5df013212c9b3613e9eab7c (diff) | |
Add tsan_decr() API, counterpart of tsan_counter()
The existing tsan_counter() API increments a reference counter.
Provide a new API, tsan_decr(), to decrement such a reference counter.
This can be used, for example, when a reference is added to the session_ctx's
sess_accept stats but should more properly be tracked in the regular ctx's
statistics.
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/7464)
(cherry picked from commit 95658c32436017aeeef3d8598957071baf6769a9)
Diffstat (limited to 'include')
| -rw-r--r-- | include/internal/tsan_assist.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/internal/tsan_assist.h b/include/internal/tsan_assist.h index 2c7638344a..f30ffe398a 100644 --- a/include/internal/tsan_assist.h +++ b/include/internal/tsan_assist.h @@ -57,6 +57,7 @@ # define tsan_load(ptr) atomic_load_explicit((ptr), memory_order_relaxed) # define tsan_store(ptr, val) atomic_store_explicit((ptr), (val), memory_order_relaxed) # define tsan_counter(ptr) atomic_fetch_add_explicit((ptr), 1, memory_order_relaxed) +# define tsan_decr(ptr) atomic_fetch_add_explicit((ptr), -1, memory_order_relaxed) # define tsan_ld_acq(ptr) atomic_load_explicit((ptr), memory_order_acquire) # define tsan_st_rel(ptr, val) atomic_store_explicit((ptr), (val), memory_order_release) # endif @@ -69,6 +70,7 @@ # define tsan_load(ptr) __atomic_load_n((ptr), __ATOMIC_RELAXED) # define tsan_store(ptr, val) __atomic_store_n((ptr), (val), __ATOMIC_RELAXED) # define tsan_counter(ptr) __atomic_fetch_add((ptr), 1, __ATOMIC_RELAXED) +# define tsan_decr(ptr) __atomic_fetch_add((ptr), -1, __ATOMIC_RELAXED) # define tsan_ld_acq(ptr) __atomic_load_n((ptr), __ATOMIC_ACQUIRE) # define tsan_st_rel(ptr, val) __atomic_store_n((ptr), (val), __ATOMIC_RELEASE) # endif @@ -113,8 +115,11 @@ # pragma intrinsic(_InterlockedExchangeAdd64) # define tsan_counter(ptr) (sizeof(*(ptr)) == 8 ? _InterlockedExchangeAdd64((ptr), 1) \ : _InterlockedExchangeAdd((ptr), 1)) +# define tsan_decr(ptr) (sizeof(*(ptr)) == 8 ? _InterlockedExchangeAdd64((ptr), -1) \ + : _InterlockedExchangeAdd((ptr), -1)) # else # define tsan_counter(ptr) _InterlockedExchangeAdd((ptr), 1) +# define tsan_decr(ptr) _InterlockedExchangeAdd((ptr), -1) # endif # if !defined(_ISO_VOLATILE) # define tsan_ld_acq(ptr) (*(ptr)) @@ -129,6 +134,7 @@ # define tsan_load(ptr) (*(ptr)) # define tsan_store(ptr, val) (*(ptr) = (val)) # define tsan_counter(ptr) ((*(ptr))++) +# define tsan_decr(ptr) ((*(ptr))--) /* * Lack of tsan_ld_acq and tsan_ld_rel means that compiler support is not * sophisticated enough to support them. Code that relies on them should be |