--- libev/ev.c 2012/05/29 20:44:39 1.436 +++ libev/ev.c 2012/05/29 21:03:22 1.437 @@ -506,6 +506,9 @@ #ifndef ECB_H #define ECB_H +/* 16 bits major, 16 bits minor */ +#define ECB_VERSION 0x00010001 + #ifdef _WIN32 typedef signed char int8_t; typedef unsigned char uint8_t; @@ -520,8 +523,23 @@ typedef signed __int64 int64_t; typedef unsigned __int64 uint64_t; #endif + #ifdef _WIN64 + #define ECB_PTRSIZE 8 + typedef uint64_t uintptr_t; + typedef int64_t intptr_t; + #else + #define ECB_PTRSIZE 4 + typedef uint32_t uintptr_t; + typedef int32_t intptr_t; + #endif + typedef intptr_t ptrdiff_t; #else #include + #if UINTMAX_MAX > 0xffffffffU + #define ECB_PTRSIZE 8 + #else + #define ECB_PTRSIZE 4 + #endif #endif /* many compilers define _GNUC_ to some versions but then only implement @@ -539,6 +557,13 @@ #endif #endif +#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */ +#define ECB_C99 (__STDC_VERSION__ >= 199901L) +#define ECB_C11 (__STDC_VERSION__ >= 201112L) +#define ECB_CPP (__cplusplus+0) +#define ECB_CPP98 (__cplusplus >= 199711L) +#define ECB_CPP11 (__cplusplus >= 201103L) + /*****************************************************************************/ /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ @@ -548,7 +573,7 @@ # define ECB_NO_SMP 1 #endif -#if ECB_NO_THREADS || ECB_NO_SMP +#if ECB_NO_SMP #define ECB_MEMORY_FENCE do { } while (0) #endif @@ -556,36 +581,47 @@ #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 #if __i386 || __i386__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") - #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */ - #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */ + #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") + #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") #elif __amd64 || __amd64__ || __x86_64 || __x86_64__ - #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") - #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory") - #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */ + #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") + #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") + #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ - #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") + #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \ || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ - || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ - #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") + || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ + #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") #elif __sparc || __sparc__ - #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory") - #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") - #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") + #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") + #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") + #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") #elif defined __s390__ || defined __s390x__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") #elif defined __mips__ - #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") + #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") #elif defined __alpha__ - #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory") + #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory") + #elif defined __hppa__ + #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") + #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") + #elif defined __ia64__ + #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory") #endif #endif #endif #ifndef ECB_MEMORY_FENCE - #if ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ + #if ECB_GCC_VERSION(4,7) + /* see comment below about the C11 memory model. in short - avoid */ + #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) + #elif defined __clang && __has_feature (cxx_atomic) + /* see above */ + #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) + #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ #define ECB_MEMORY_FENCE __sync_synchronize () /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */ /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */ @@ -608,6 +644,18 @@ #endif #ifndef ECB_MEMORY_FENCE + #if ECB_C11 && !defined __STDC_NO_ATOMICS__ + /* we assume that these memory fences work on all variables/all memory accesses, */ + /* not just C11 atomics and atomic accesses */ + #include + /* unfortunately, the C11 memory model seems to be very limited, and unable to express */ + /* simple barrier semantics. That means we need to take out thor's hammer. */ + #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) + #endif + #endif +#endif + +#ifndef ECB_MEMORY_FENCE #if !ECB_AVOID_PTHREADS /* * if you get undefined symbol references to pthread_mutex_lock, @@ -635,8 +683,6 @@ /*****************************************************************************/ -#define ECB_C99 (__STDC_VERSION__ >= 199901L) - #if __cplusplus #define ecb_inline static inline #elif ECB_GCC_VERSION(2,5) @@ -684,11 +730,16 @@ #endif #define ecb_noinline ecb_attribute ((__noinline__)) -#define ecb_noreturn ecb_attribute ((__noreturn__)) #define ecb_unused ecb_attribute ((__unused__)) #define ecb_const ecb_attribute ((__const__)) #define ecb_pure ecb_attribute ((__pure__)) +#if ECB_C11 + #define ecb_noreturn _Noreturn +#else + #define ecb_noreturn ecb_attribute ((__noreturn__)) +#endif + #if ECB_GCC_VERSION(4,3) #define ecb_artificial ecb_attribute ((__artificial__)) #define ecb_hot ecb_attribute ((__hot__)) @@ -788,6 +839,11 @@ } #endif +ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const; +ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } +ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const; +ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); } + ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const; ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) {