diff options
Diffstat (limited to 'core/safe_refcount.cpp')
| -rw-r--r-- | core/safe_refcount.cpp | 148 |
1 files changed, 15 insertions, 133 deletions
diff --git a/core/safe_refcount.cpp b/core/safe_refcount.cpp index c330a983a7..c9acdb7970 100644 --- a/core/safe_refcount.cpp +++ b/core/safe_refcount.cpp @@ -27,122 +27,10 @@ /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /*************************************************************************/ -#include "safe_refcount.h" - -// Atomic functions, these are used for multithread safe reference counters! - -#ifdef NO_THREADS - -/* Bogus implementation unaware of multiprocessing */ - -template <class T> -static _ALWAYS_INLINE_ T _atomic_conditional_increment_impl(register T *pw) { - - if (*pw == 0) - return 0; - - (*pw)++; - - return *pw; -} - -template <class T> -static _ALWAYS_INLINE_ T _atomic_decrement_impl(register T *pw) { - - (*pw)--; - - return *pw; -} - -template <class T> -static _ALWAYS_INLINE_ T _atomic_increment_impl(register T *pw) { - - (*pw)++; - - return *pw; -} - -template <class T> -static _ALWAYS_INLINE_ T _atomic_sub_impl(register T *pw, register T val) { - - (*pw) -= val; - - return *pw; -} - -template <class T> -static _ALWAYS_INLINE_ T _atomic_add_impl(register T *pw, register T val) { - - (*pw) += val; - - return *pw; -} - -template <class T> -static _ALWAYS_INLINE_ T _atomic_exchange_if_greater_impl(register T *pw, register T val) { - - if (val > *pw) - *pw = val; - - return *pw; -} -#elif defined(__GNUC__) - -/* Implementation for GCC & Clang */ - -// GCC guarantees atomic intrinsics for sizes of 1, 2, 4 and 8 bytes. -// Clang states it supports GCC atomic builtins. - -template <class T> -static _ALWAYS_INLINE_ T _atomic_conditional_increment_impl(register T *pw) { - - while (true) { - T tmp = static_cast<T const volatile &>(*pw); - if (tmp == 0) - return 0; // if zero, can't add to it anymore - if (__sync_val_compare_and_swap(pw, tmp, tmp + 1) == tmp) - return tmp + 1; - } -} - -template <class T> -static _ALWAYS_INLINE_ T _atomic_decrement_impl(register T *pw) { - - return __sync_sub_and_fetch(pw, 1); -} - -template <class T> -static _ALWAYS_INLINE_ T _atomic_increment_impl(register T *pw) { - - return __sync_add_and_fetch(pw, 1); -} - -template <class T> -static _ALWAYS_INLINE_ T _atomic_sub_impl(register T *pw, register T val) { - - return __sync_sub_and_fetch(pw, val); -} - -template <class T> -static _ALWAYS_INLINE_ T _atomic_add_impl(register T *pw, register T val) { - - return __sync_add_and_fetch(pw, val); -} - -template <class T> -static _ALWAYS_INLINE_ T _atomic_exchange_if_greater_impl(register T *pw, register T val) { - - while (true) { - T tmp = static_cast<T const volatile &>(*pw); - if (tmp >= val) - return tmp; // already greater, or equal - if (__sync_val_compare_and_swap(pw, tmp, val) == tmp) - return val; - } -} +#include "safe_refcount.h" -#elif defined(_MSC_VER) +#if defined(_MSC_VER) /* Implementation for MSVC-Windows */ @@ -169,73 +57,66 @@ static _ALWAYS_INLINE_ T _atomic_exchange_if_greater_impl(register T *pw, regist return m_val; \ } -static _ALWAYS_INLINE_ uint32_t _atomic_conditional_increment_impl(register uint32_t *pw) { +_ALWAYS_INLINE_ uint32_t _atomic_conditional_increment_impl(register uint32_t *pw) { ATOMIC_CONDITIONAL_INCREMENT_BODY(pw, LONG, InterlockedCompareExchange, uint32_t) } -static _ALWAYS_INLINE_ uint32_t _atomic_decrement_impl(register uint32_t *pw) { +_ALWAYS_INLINE_ uint32_t _atomic_decrement_impl(register uint32_t *pw) { return InterlockedDecrement((LONG volatile *)pw); } -static _ALWAYS_INLINE_ uint32_t _atomic_increment_impl(register uint32_t *pw) { +_ALWAYS_INLINE_ uint32_t _atomic_increment_impl(register uint32_t *pw) { return InterlockedIncrement((LONG volatile *)pw); } -static _ALWAYS_INLINE_ uint32_t _atomic_sub_impl(register uint32_t *pw, register uint32_t val) { +_ALWAYS_INLINE_ uint32_t _atomic_sub_impl(register uint32_t *pw, register uint32_t val) { return InterlockedExchangeAdd((LONG volatile *)pw, -(int32_t)val) - val; } -static _ALWAYS_INLINE_ uint32_t _atomic_add_impl(register uint32_t *pw, register uint32_t val) { +_ALWAYS_INLINE_ uint32_t _atomic_add_impl(register uint32_t *pw, register uint32_t val) { return InterlockedAdd((LONG volatile *)pw, val); } -static _ALWAYS_INLINE_ uint32_t _atomic_exchange_if_greater_impl(register uint32_t *pw, register uint32_t val) { +_ALWAYS_INLINE_ uint32_t _atomic_exchange_if_greater_impl(register uint32_t *pw, register uint32_t val) { ATOMIC_EXCHANGE_IF_GREATER_BODY(pw, val, LONG, InterlockedCompareExchange, uint32_t) } -static _ALWAYS_INLINE_ uint64_t _atomic_conditional_increment_impl(register uint64_t *pw) { +_ALWAYS_INLINE_ uint64_t _atomic_conditional_increment_impl(register uint64_t *pw) { ATOMIC_CONDITIONAL_INCREMENT_BODY(pw, LONGLONG, InterlockedCompareExchange64, uint64_t) } -static _ALWAYS_INLINE_ uint64_t _atomic_decrement_impl(register uint64_t *pw) { +_ALWAYS_INLINE_ uint64_t _atomic_decrement_impl(register uint64_t *pw) { return InterlockedDecrement64((LONGLONG volatile *)pw); } -static _ALWAYS_INLINE_ uint64_t _atomic_increment_impl(register uint64_t *pw) { +_ALWAYS_INLINE_ uint64_t _atomic_increment_impl(register uint64_t *pw) { return InterlockedIncrement64((LONGLONG volatile *)pw); } -static _ALWAYS_INLINE_ uint64_t _atomic_sub_impl(register uint64_t *pw, register uint64_t val) { +_ALWAYS_INLINE_ uint64_t _atomic_sub_impl(register uint64_t *pw, register uint64_t val) { return InterlockedExchangeAdd64((LONGLONG volatile *)pw, -(int64_t)val) - val; } -static _ALWAYS_INLINE_ uint64_t _atomic_add_impl(register uint64_t *pw, register uint64_t val) { +_ALWAYS_INLINE_ uint64_t _atomic_add_impl(register uint64_t *pw, register uint64_t val) { return InterlockedAdd64((LONGLONG volatile *)pw, val); } -static _ALWAYS_INLINE_ uint64_t _atomic_exchange_if_greater_impl(register uint64_t *pw, register uint64_t val) { +_ALWAYS_INLINE_ uint64_t _atomic_exchange_if_greater_impl(register uint64_t *pw, register uint64_t val) { ATOMIC_EXCHANGE_IF_GREATER_BODY(pw, val, LONGLONG, InterlockedCompareExchange64, uint64_t) } -#else - -//no threads supported? -#error Must provide atomic functions for this platform or compiler! - -#endif - // The actual advertised functions; they'll call the right implementation uint32_t atomic_conditional_increment(register uint32_t *counter) { @@ -285,3 +166,4 @@ uint64_t atomic_add(register uint64_t *pw, register uint64_t val) { uint64_t atomic_exchange_if_greater(register uint64_t *pw, register uint64_t val) { return _atomic_exchange_if_greater_impl(pw, val); } +#endif |