ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/libev/ev.c
(Generate patch)

Comparing libev/ev.c (file contents):
Revision 1.495 by root, Mon Jun 24 21:27:57 2019 UTC vs.
Revision 1.496 by root, Mon Jun 24 22:27:29 2019 UTC

… …
559 559
560#ifndef ECB_H 560#ifndef ECB_H
561#define ECB_H 561#define ECB_H
562 562
563/* 16 bits major, 16 bits minor */ 563/* 16 bits major, 16 bits minor */
564#define ECB_VERSION 0x00010005 564#define ECB_VERSION 0x00010006
565 565
566#ifdef _WIN32 566#ifdef _WIN32
567 typedef signed char int8_t; 567 typedef signed char int8_t;
568 typedef unsigned char uint8_t; 568 typedef unsigned char uint8_t;
569 typedef signed short int16_t; 569 typedef signed short int16_t;
… …
683 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */ 683 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
684#endif 684#endif
685 685
686#ifndef ECB_MEMORY_FENCE 686#ifndef ECB_MEMORY_FENCE
687 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 687 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
688 #define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory")
688 #if __i386 || __i386__ 689 #if __i386 || __i386__
689 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") 690 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
690 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") 691 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
691 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory") 692 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
692 #elif ECB_GCC_AMD64 693 #elif ECB_GCC_AMD64
… …
742 #if ECB_GCC_VERSION(4,7) 743 #if ECB_GCC_VERSION(4,7)
743 /* see comment below (stdatomic.h) about the C11 memory model. */ 744 /* see comment below (stdatomic.h) about the C11 memory model. */
744 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) 745 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
745 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE) 746 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
746 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE) 747 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
748 #define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED)
747 749
748 #elif ECB_CLANG_EXTENSION(c_atomic) 750 #elif ECB_CLANG_EXTENSION(c_atomic)
749 /* see comment below (stdatomic.h) about the C11 memory model. */ 751 /* see comment below (stdatomic.h) about the C11 memory model. */
750 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) 752 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
751 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE) 753 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
752 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE) 754 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
755 #define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED)
753 756
754 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ 757 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
755 #define ECB_MEMORY_FENCE __sync_synchronize () 758 #define ECB_MEMORY_FENCE __sync_synchronize ()
756 #elif _MSC_VER >= 1500 /* VC++ 2008 */ 759 #elif _MSC_VER >= 1500 /* VC++ 2008 */
757 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */ 760 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
… …
767 #elif defined _WIN32 770 #elif defined _WIN32
768 #include <WinNT.h> 771 #include <WinNT.h>
769 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */ 772 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
770 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 773 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
771 #include <mbarrier.h> 774 #include <mbarrier.h>
772 #define ECB_MEMORY_FENCE __machine_rw_barrier () 775 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
773 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier () 776 #define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier ()
774 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier () 777 #define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier ()
778 #define ECB_MEMORY_FENCE_RELAXED __compiler_barrier ()
775 #elif __xlC__ 779 #elif __xlC__
776 #define ECB_MEMORY_FENCE __sync () 780 #define ECB_MEMORY_FENCE __sync ()
777 #endif 781 #endif
778#endif 782#endif
779 783
780#ifndef ECB_MEMORY_FENCE 784#ifndef ECB_MEMORY_FENCE
781 #if ECB_C11 && !defined __STDC_NO_ATOMICS__ 785 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
782 /* we assume that these memory fences work on all variables/all memory accesses, */ 786 /* we assume that these memory fences work on all variables/all memory accesses, */
783 /* not just C11 atomics and atomic accesses */ 787 /* not just C11 atomics and atomic accesses */
784 #include <stdatomic.h> 788 #include <stdatomic.h>
785 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
786 /* any fence other than seq_cst, which isn't very efficient for us. */
787 /* Why that is, we don't know - either the C11 memory model is quite useless */
788 /* for most usages, or gcc and clang have a bug */
789 /* I *currently* lean towards the latter, and inefficiently implement */
790 /* all three of ecb's fences as a seq_cst fence */
791 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
792 /* for all __atomic_thread_fence's except seq_cst */
793 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) 789 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
790 #define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
791 #define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
794 #endif 792 #endif
795#endif 793#endif
796 794
797#ifndef ECB_MEMORY_FENCE 795#ifndef ECB_MEMORY_FENCE
798 #if !ECB_AVOID_PTHREADS 796 #if !ECB_AVOID_PTHREADS
… …
816 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE 814 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
817#endif 815#endif
818 816
819#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE 817#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
820 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE 818 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
819#endif
820
821#if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE
822 #define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */
821#endif 823#endif
822 824
823/*****************************************************************************/ 825/*****************************************************************************/
824 826
825#if ECB_CPP 827#if ECB_CPP

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines