Browse Source

*** empty log message ***

master
Marc Alexander Lehmann 9 years ago
parent
commit
5fb1e7c3cc
  1. 92
      ev.c

92
ev.c

@ -506,6 +506,9 @@ struct signalfd_siginfo
#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 @@ struct signalfd_siginfo
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 <inttypes.h>
#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 @@ struct signalfd_siginfo
#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 @@ struct signalfd_siginfo
# 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 @@ struct signalfd_siginfo
#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 ); }) */
@ -607,6 +643,18 @@ struct signalfd_siginfo
#endif
#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 <stdatomic.h>
/* 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
/*
@ -635,8 +683,6 @@ struct signalfd_siginfo
/*****************************************************************************/
#define ECB_C99 (__STDC_VERSION__ >= 199901L)
#if __cplusplus
#define ecb_inline static inline
#elif ECB_GCC_VERSION(2,5)
@ -684,11 +730,16 @@ typedef int ecb_bool;
#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 @@ typedef int ecb_bool;
}
#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)
{

Loading…
Cancel
Save