source: libcfa/src/bits/defs.hfa @ 9cd5bd2

pthread-emulation
Last change on this file since 9cd5bd2 was 9cd5bd2, checked in by Thierry Delisle <tdelisle@…>, 4 months ago

Added an assembly to prevent null-checks from being optimized out.
Attempted to reduce the scope of needed headers.
Cleaned tabbing.

  • Property mode set to 100644
File size: 2.9 KB
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1//
2// Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
7// defs.hfa -- Commen macros, functions and typedefs
8// Most files depend on them and they are always useful to have.
9//
10//  *** Must not contain code specific to libcfathread ***
11//
12// Author           : Thierry Delisle
13// Created On       : Thu Nov  9 13:24:10 2017
14// Last Modified By : Peter A. Buhr
15// Last Modified On : Sat Oct 24 10:53:15 2020
16// Update Count     : 21
17//
18
19#pragma once
20
21#include <stdint.h>
22#include <assert.h>
23
24#define likely(x)   __builtin_expect(!!(x), 1)
25#define unlikely(x) __builtin_expect(!!(x), 0)
26
27typedef void (*fptr_t)();
28typedef int_fast16_t __lock_size_t;
29
30#ifdef __cforall
31#define __cfa_anonymous_object(x) inline struct x
32#define __cfa_dlink(x) inline dlink(x)
33#else
34#define __cfa_anonymous_object(x) struct x __cfa_anonymous_object
35#define __cfa_dlink(x) struct { struct x * next; struct x * back; } __dlink_substitute
36#endif
37
38
39#if defined(__has_attribute)
40#if !__has_attribute(__noclone__)
41#define ATTRIBUTE_NOCLONE
42#endif
43#endif
44#ifndef ATTRIBUTE_NOCLONE
45#define ATTRIBUTE_NOCLONE __attribute__((__noclone__))
46#endif
47
48#define libcfa_public __attribute__((visibility("default")))
49#define libcfa_nopreempt __attribute__((section("cfatext_nopreempt"))) __attribute__((__noinline__)) ATTRIBUTE_NOCLONE
50
51struct __cfa_nopreempt_region {
52        void * start;
53        void * stop;
54};
55
56#ifdef __cforall
57void abort( const char fmt[], ... ) __attribute__ (( format(printf, 1, 2), __nothrow__, __leaf__, __noreturn__ ));
58void abort( bool signalAbort, const char fmt[], ... ) __attribute__ (( format(printf, 2, 3), __nothrow__, __leaf__, __noreturn__ ));
59extern "C" {
60#endif
61void __cabi_abort( const char fmt[], ... ) __attribute__ (( format(printf, 1, 2), __nothrow__, __leaf__, __noreturn__ ));
62#ifdef __cforall
63}
64#endif
65
66#if defined(__cforall_thread__)
67#define OPTIONAL_THREAD
68#else
69#define OPTIONAL_THREAD __attribute__((weak))
70#endif
71
72static inline long long int rdtscl(void) {
73        #if defined( __i386 ) || defined( __x86_64 )
74        unsigned int lo, hi;
75        __asm__ __volatile__ ("rdtsc" : "=a"(lo), "=d"(hi));
76        return ( (unsigned long long)lo)|( ((unsigned long long)hi)<<32 );
77        #elif defined( __aarch64__ ) || defined( __arm__ )
78        // https://github.com/google/benchmark/blob/v1.1.0/src/cycleclock.h#L116
79        long long int virtual_timer_value;
80        asm volatile("mrs %0, cntvct_el0" : "=r"(virtual_timer_value));
81        return virtual_timer_value;
82        #else
83                #error unsupported hardware architecture
84        #endif
85}
86
87// pause to prevent excess processor bus usage
88#if defined( __i386 ) || defined( __x86_64 )
89        #define Pause() __asm__ __volatile__ ( "pause" : : : )
90#elif defined( __ARM_ARCH )
91        #define Pause() __asm__ __volatile__ ( "YIELD" : : : )
92#else
93        #error unsupported architecture
94#endif
95
96#define CFA_IO_LAZY (1_l64u << 32_l64u)
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