/usr/include/mpich/primitives/opa_emulated.h is in libmpich-dev 3.3~a2-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 | /* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
/*
* (C) 2008 by Argonne National Laboratory.
* See COPYRIGHT in top-level directory.
*/
#ifndef OPA_EMULATED_H_INCLUDED
#define OPA_EMULATED_H_INCLUDED
/* Functions emulated using other atomics
This header should be included at the bottom of any atomic
primitives header that needs to implement an atomic op in terms of
another atomic.
*/
/* Emulating using LL/SC */
#if defined(OPA_LL_SC_SUPPORTED)
static _opa_inline int OPA_fetch_and_add_int_by_llsc(OPA_int_t *ptr, int val)
{
int prev;
do {
prev = OPA_LL_int(ptr);
} while (!OPA_SC_int(ptr, prev + val));
return prev;
}
static _opa_inline void OPA_add_int_by_llsc(OPA_int_t *ptr, int val)
{
OPA_fetch_and_add_int_by_llsc(ptr, val);
}
static _opa_inline void OPA_incr_int_by_llsc(OPA_int_t *ptr)
{
OPA_add_int_by_llsc(ptr, 1);
}
static _opa_inline void OPA_decr_int_by_llsc(OPA_int_t *ptr)
{
OPA_add_int_by_llsc(ptr, -1);
}
static _opa_inline int OPA_fetch_and_decr_int_by_llsc(OPA_int_t *ptr)
{
return OPA_fetch_and_add_int_by_llsc(ptr, -1);
}
static _opa_inline int OPA_fetch_and_incr_int_by_llsc(OPA_int_t *ptr)
{
return OPA_fetch_and_add_int_by_llsc(ptr, 1);
}
static _opa_inline int OPA_decr_and_test_int_by_llsc(OPA_int_t *ptr)
{
int prev = OPA_fetch_and_decr_int_by_llsc(ptr);
return prev == 1;
}
static _opa_inline void *OPA_cas_ptr_by_llsc(OPA_ptr_t *ptr, void *oldv, void *newv)
{
void *prev;
do {
prev = OPA_LL_ptr(ptr);
} while (prev == oldv && !OPA_SC_ptr(ptr, newv));
return prev;
}
static _opa_inline int OPA_cas_int_by_llsc(OPA_int_t *ptr, int oldv, int newv)
{
int prev;
do {
prev = OPA_LL_int(ptr);
} while (prev == oldv && !OPA_SC_int(ptr, newv));
return prev;
}
static _opa_inline void *OPA_swap_ptr_by_llsc(OPA_ptr_t *ptr, void *val)
{
void *prev;
do {
prev = OPA_LL_ptr(ptr);
} while (!OPA_SC_ptr(ptr, val));
return prev;
}
static _opa_inline int OPA_swap_int_by_llsc(OPA_int_t *ptr, int val)
{
int prev;
do {
prev = OPA_LL_int(ptr);
} while (!OPA_SC_int(ptr, val));
return prev;
}
#endif /* OPA_LL_SC_SUPPORTED */
static _opa_inline int OPA_fetch_and_add_int_by_cas(OPA_int_t *ptr, int val)
{
int cmp;
int prev = OPA_load_int(ptr);
do {
cmp = prev;
prev = OPA_cas_int(ptr, cmp, prev + val);
} while (prev != cmp);
return prev;
}
static _opa_inline int OPA_fetch_and_incr_int_by_faa(OPA_int_t *ptr)
{
return OPA_fetch_and_add_int(ptr, 1);
}
static _opa_inline int OPA_fetch_and_decr_int_by_faa(OPA_int_t *ptr)
{
return OPA_fetch_and_add_int(ptr, -1);
}
static _opa_inline int OPA_decr_and_test_int_by_fad(OPA_int_t *ptr)
{
return OPA_fetch_and_decr_int(ptr) == 1;
}
static _opa_inline void OPA_add_int_by_faa(OPA_int_t *ptr, int val)
{
OPA_fetch_and_add_int(ptr, val);
}
static _opa_inline int OPA_incr_int_by_faa(OPA_int_t *ptr)
{
return OPA_fetch_and_add_int(ptr, 1);
}
static _opa_inline void OPA_incr_int_by_add(OPA_int_t *ptr)
{
OPA_add_int(ptr, 1);
}
static _opa_inline void OPA_incr_int_by_fai(OPA_int_t *ptr)
{
OPA_fetch_and_incr_int(ptr);
}
static _opa_inline int OPA_decr_int_by_faa(OPA_int_t *ptr)
{
return OPA_fetch_and_add_int(ptr, -1);
}
static _opa_inline void OPA_decr_int_by_add(OPA_int_t *ptr)
{
OPA_add_int(ptr, -1);
}
static _opa_inline void OPA_decr_int_by_fad(OPA_int_t *ptr)
{
OPA_fetch_and_decr_int(ptr);
}
/* Swap using CAS */
static _opa_inline void *OPA_swap_ptr_by_cas(OPA_ptr_t *ptr, void *val)
{
void *cmp;
void *prev = OPA_load_ptr(ptr);
do {
cmp = prev;
prev = OPA_cas_ptr(ptr, cmp, val);
} while (prev != cmp);
return prev;
}
static _opa_inline int OPA_swap_int_by_cas(OPA_int_t *ptr, int val)
{
int cmp;
int prev = OPA_load_int(ptr);
do {
cmp = prev;
prev = OPA_cas_int(ptr, cmp, val);
} while (prev != cmp);
return prev;
}
#endif /* OPA_EMULATED_H_INCLUDED */
|