impatomic: silence more clang warnings

[cdsspec-compiler.git] / include / impatomic.h

diff --git a/include/impatomic.h b/include/impatomic.h
index 7ecc3737f930274b68532b6417284863f2bfd828..1b9ce6be97f9efdb23debaaa87c820406a65ccf2 100644 (file)
--- a/include/impatomic.h
+++ b/include/impatomic.h
@@ -14,6 +14,8 @@
 
 #ifdef __cplusplus
 namespace std {
+#else
+#include <stdbool.h>
 #endif
 
 #define CPP0X( feature )
@@ -86,14 +88,16 @@ inline void atomic_flag::clear( memory_order __x__ ) volatile
         ({ volatile __typeof__((__a__)->__f__)* __p__ = & ((__a__)->__f__);   \
                 __typeof__(__m__) __v__ = (__m__);                            \
                 model_write_action((void *) __p__,  __x__, (uint64_t) __v__); \
-                __v__; })
+                __v__ = __v__; /* Silence clang (-Wunused-value) */           \
+         })
 
 
 #define _ATOMIC_INIT_( __a__, __m__ )                                         \
         ({ volatile __typeof__((__a__)->__f__)* __p__ = & ((__a__)->__f__);   \
                 __typeof__(__m__) __v__ = (__m__);                            \
                 model_init_action((void *) __p__,  (uint64_t) __v__);         \
-                __v__; })
+                __v__ = __v__; /* Silence clang (-Wunused-value) */           \
+         })
 
 #define _ATOMIC_MODIFY_( __a__, __o__, __m__, __x__ )                         \
         ({ volatile __typeof__((__a__)->__f__)* __p__ = & ((__a__)->__f__);   \
@@ -102,7 +106,8 @@ inline void atomic_flag::clear( memory_order __x__ ) volatile
         __typeof__((__a__)->__f__) __copy__= __old__;                         \
         __copy__ __o__ __v__;                                                 \
         model_rmw_action((void *)__p__, __x__, (uint64_t) __copy__);          \
-        __old__; })
+        __old__ = __old__; /* Silence clang (-Wunused-value) */               \
+         })
 
 /* No spurious failure for now */
 #define _ATOMIC_CMPSWP_WEAK_ _ATOMIC_CMPSWP_
@@ -1618,6 +1623,10 @@ inline bool atomic_load_explicit
 inline bool atomic_load
 ( volatile atomic_bool* __a__ ) { return atomic_load_explicit( __a__, memory_order_seq_cst ); }
 
+inline void atomic_init
+( volatile atomic_bool* __a__, bool __m__ )
+{ _ATOMIC_INIT_( __a__, __m__ ); }
+
 inline void atomic_store_explicit
 ( volatile atomic_bool* __a__, bool __m__, memory_order __x__ )
 { _ATOMIC_STORE_( __a__, __m__, __x__ ); }
@@ -1665,6 +1674,10 @@ inline void* atomic_load_explicit
 inline void* atomic_load( volatile atomic_address* __a__ )
 { return atomic_load_explicit( __a__, memory_order_seq_cst ); }
 
+inline void atomic_init
+( volatile atomic_address* __a__, void* __m__ )
+{ _ATOMIC_INIT_( __a__, __m__ ); }
+
 inline void atomic_store_explicit
 ( volatile atomic_address* __a__, void* __m__, memory_order __x__ )
 { _ATOMIC_STORE_( __a__, __m__, __x__ ); }
@@ -1712,6 +1725,10 @@ inline char atomic_load_explicit
 inline char atomic_load( volatile atomic_char* __a__ )
 { return atomic_load_explicit( __a__, memory_order_seq_cst ); }
 
+inline void atomic_init
+( volatile atomic_char* __a__, char __m__ )
+{ _ATOMIC_INIT_( __a__, __m__ ); }
+
 inline void atomic_store_explicit
 ( volatile atomic_char* __a__, char __m__, memory_order __x__ )
 { _ATOMIC_STORE_( __a__, __m__, __x__ ); }
@@ -1759,6 +1776,10 @@ inline signed char atomic_load_explicit
 inline signed char atomic_load( volatile atomic_schar* __a__ )
 { return atomic_load_explicit( __a__, memory_order_seq_cst ); }
 
+inline void atomic_init
+( volatile atomic_schar* __a__, signed char __m__ )
+{ _ATOMIC_INIT_( __a__, __m__ ); }
+
 inline void atomic_store_explicit
 ( volatile atomic_schar* __a__, signed char __m__, memory_order __x__ )
 { _ATOMIC_STORE_( __a__, __m__, __x__ ); }
@@ -1806,6 +1827,10 @@ inline unsigned char atomic_load_explicit
 inline unsigned char atomic_load( volatile atomic_uchar* __a__ )
 { return atomic_load_explicit( __a__, memory_order_seq_cst ); }
 
+inline void atomic_init
+( volatile atomic_uchar* __a__, unsigned char __m__ )
+{ _ATOMIC_INIT_( __a__, __m__ ); }
+
 inline void atomic_store_explicit
 ( volatile atomic_uchar* __a__, unsigned char __m__, memory_order __x__ )
 { _ATOMIC_STORE_( __a__, __m__, __x__ ); }
@@ -1853,6 +1878,10 @@ inline short atomic_load_explicit
 inline short atomic_load( volatile atomic_short* __a__ )
 { return atomic_load_explicit( __a__, memory_order_seq_cst ); }
 
+inline void atomic_init
+( volatile atomic_short* __a__, short __m__ )
+{ _ATOMIC_INIT_( __a__, __m__ ); }
+
 inline void atomic_store_explicit
 ( volatile atomic_short* __a__, short __m__, memory_order __x__ )
 { _ATOMIC_STORE_( __a__, __m__, __x__ ); }
@@ -1900,6 +1929,10 @@ inline unsigned short atomic_load_explicit
 inline unsigned short atomic_load( volatile atomic_ushort* __a__ )
 { return atomic_load_explicit( __a__, memory_order_seq_cst ); }
 
+inline void atomic_init
+( volatile atomic_ushort* __a__, unsigned short __m__ )
+{ _ATOMIC_INIT_( __a__, __m__ ); }
+
 inline void atomic_store_explicit
 ( volatile atomic_ushort* __a__, unsigned short __m__, memory_order __x__ )
 { _ATOMIC_STORE_( __a__, __m__, __x__ ); }
@@ -1947,6 +1980,10 @@ inline int atomic_load_explicit
 inline int atomic_load( volatile atomic_int* __a__ )
 { return atomic_load_explicit( __a__, memory_order_seq_cst ); }
 
+inline void atomic_init
+( volatile atomic_int* __a__, int __m__ )
+{ _ATOMIC_INIT_( __a__, __m__ ); }
+
 inline void atomic_store_explicit
 ( volatile atomic_int* __a__, int __m__, memory_order __x__ )
 { _ATOMIC_STORE_( __a__, __m__, __x__ ); }
@@ -1994,6 +2031,10 @@ inline unsigned int atomic_load_explicit
 inline unsigned int atomic_load( volatile atomic_uint* __a__ )
 { return atomic_load_explicit( __a__, memory_order_seq_cst ); }
 
+inline void atomic_init
+( volatile atomic_uint* __a__, unsigned int __m__ )
+{ _ATOMIC_INIT_( __a__, __m__ ); }
+
 inline void atomic_store_explicit
 ( volatile atomic_uint* __a__, unsigned int __m__, memory_order __x__ )
 { _ATOMIC_STORE_( __a__, __m__, __x__ ); }
@@ -2041,6 +2082,10 @@ inline long atomic_load_explicit
 inline long atomic_load( volatile atomic_long* __a__ )
 { return atomic_load_explicit( __a__, memory_order_seq_cst ); }
 
+inline void atomic_init
+( volatile atomic_long* __a__, long __m__ )
+{ _ATOMIC_INIT_( __a__, __m__ ); }
+
 inline void atomic_store_explicit
 ( volatile atomic_long* __a__, long __m__, memory_order __x__ )
 { _ATOMIC_STORE_( __a__, __m__, __x__ ); }
@@ -2088,6 +2133,10 @@ inline unsigned long atomic_load_explicit
 inline unsigned long atomic_load( volatile atomic_ulong* __a__ )
 { return atomic_load_explicit( __a__, memory_order_seq_cst ); }
 
+inline void atomic_init
+( volatile atomic_ulong* __a__, unsigned long __m__ )
+{ _ATOMIC_INIT_( __a__, __m__ ); }
+
 inline void atomic_store_explicit
 ( volatile atomic_ulong* __a__, unsigned long __m__, memory_order __x__ )
 { _ATOMIC_STORE_( __a__, __m__, __x__ ); }
@@ -2135,6 +2184,10 @@ inline long long atomic_load_explicit
 inline long long atomic_load( volatile atomic_llong* __a__ )
 { return atomic_load_explicit( __a__, memory_order_seq_cst ); }
 
+inline void atomic_init
+( volatile atomic_llong* __a__, long long __m__ )
+{ _ATOMIC_INIT_( __a__, __m__ ); }
+
 inline void atomic_store_explicit
 ( volatile atomic_llong* __a__, long long __m__, memory_order __x__ )
 { _ATOMIC_STORE_( __a__, __m__, __x__ ); }
@@ -2182,6 +2235,10 @@ inline unsigned long long atomic_load_explicit
 inline unsigned long long atomic_load( volatile atomic_ullong* __a__ )
 { return atomic_load_explicit( __a__, memory_order_seq_cst ); }
 
+inline void atomic_init
+( volatile atomic_ullong* __a__, unsigned long long __m__ )
+{ _ATOMIC_INIT_( __a__, __m__ ); }
+
 inline void atomic_store_explicit
 ( volatile atomic_ullong* __a__, unsigned long long __m__, memory_order __x__ )
 { _ATOMIC_STORE_( __a__, __m__, __x__ ); }
@@ -2229,6 +2286,10 @@ inline wchar_t atomic_load_explicit
 inline wchar_t atomic_load( volatile atomic_wchar_t* __a__ )
 { return atomic_load_explicit( __a__, memory_order_seq_cst ); }
 
+inline void atomic_init
+( volatile atomic_wchar_t* __a__, wchar_t __m__ )
+{ _ATOMIC_INIT_( __a__, __m__ ); }
+
 inline void atomic_store_explicit
 ( volatile atomic_wchar_t* __a__, wchar_t __m__, memory_order __x__ )
 { _ATOMIC_STORE_( __a__, __m__, __x__ ); }
@@ -3841,6 +3902,19 @@ T* atomic<T*>::fetch_sub( ptrdiff_t __v__, memory_order __x__ ) volatile
 
 #endif
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+static inline void atomic_thread_fence(memory_order order)
+{ _ATOMIC_FENCE_(order); }
+
+/** @todo Do we want to try to support a user's signal-handler? */
+static inline void atomic_signal_fence(memory_order order)
+{ /* No-op? */ }
+#ifdef __cplusplus
+}
+#endif
+
 
 #ifdef __cplusplus
 } // namespace std