Phase 1 of deprecating liburcu-signal
[urcu.git] / include / urcu / uatomic.h
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1// SPDX-FileCopyrightText: 2020 Michael Jeanson <mjeanson@efficios.com>
2//
3// SPDX-License-Identifier: LGPL-2.1-or-later
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4
5#ifndef _URCU_UATOMIC_H
6#define _URCU_UATOMIC_H
7
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8#include <assert.h>
9
0b1e236d 10#include <urcu/arch.h>
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11#include <urcu/config.h>
12
13enum cmm_memorder {
14 CMM_RELAXED = 0,
15 CMM_CONSUME = 1,
16 CMM_ACQUIRE = 2,
17 CMM_RELEASE = 3,
18 CMM_ACQ_REL = 4,
19 CMM_SEQ_CST = 5,
20 CMM_SEQ_CST_FENCE = 6,
21};
22
23#ifdef CONFIG_RCU_USE_ATOMIC_BUILTINS
24
25/*
26 * Make sure that CMM_SEQ_CST_FENCE is not equivalent to other memory orders.
27 */
28# ifdef static_assert
29static_assert(CMM_RELAXED == __ATOMIC_RELAXED, "");
30static_assert(CMM_CONSUME == __ATOMIC_CONSUME, "");
31static_assert(CMM_ACQUIRE == __ATOMIC_ACQUIRE, "");
32static_assert(CMM_RELEASE == __ATOMIC_RELEASE, "");
33static_assert(CMM_ACQ_REL == __ATOMIC_ACQ_REL, "");
34static_assert(CMM_SEQ_CST == __ATOMIC_SEQ_CST, "");
35# endif
36
37/*
38 * This is not part of the public API. It it used internally to implement the
39 * CMM_SEQ_CST_FENCE memory order.
40 *
41 * NOTE: Using switch here instead of if statement to avoid -Wduplicated-cond
42 * warning when memory order is conditionally determined.
43 */
44static inline void cmm_seq_cst_fence_after_atomic(enum cmm_memorder mo)
45{
46 switch (mo) {
47 case CMM_SEQ_CST_FENCE:
48 cmm_smp_mb();
49 break;
50 default:
51 break;
52 }
53}
54
55#endif
56
57/*
58 * This is not part of the public API. It is used internally to convert from the
59 * CMM memory model to the C11 memory model.
60 */
61static inline int cmm_to_c11(int mo)
62{
63 if (mo == CMM_SEQ_CST_FENCE) {
64 return CMM_SEQ_CST;
65 }
66 return mo;
67}
0b1e236d 68
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69#if defined(CONFIG_RCU_USE_ATOMIC_BUILTINS)
70#include <urcu/uatomic/builtins.h>
71#elif defined(URCU_ARCH_X86)
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72#include <urcu/uatomic/x86.h>
73#elif defined(URCU_ARCH_PPC)
74#include <urcu/uatomic/ppc.h>
75#elif defined(URCU_ARCH_S390)
76#include <urcu/uatomic/s390.h>
77#elif defined(URCU_ARCH_SPARC64)
78#include <urcu/uatomic/sparc64.h>
79#elif defined(URCU_ARCH_ALPHA)
80#include <urcu/uatomic/alpha.h>
81#elif defined(URCU_ARCH_IA64)
82#include <urcu/uatomic/ia64.h>
83#elif defined(URCU_ARCH_ARM)
84#include <urcu/uatomic/arm.h>
85#elif defined(URCU_ARCH_AARCH64)
86#include <urcu/uatomic/aarch64.h>
87#elif defined(URCU_ARCH_MIPS)
88#include <urcu/uatomic/mips.h>
89#elif defined(URCU_ARCH_NIOS2)
90#include <urcu/uatomic/nios2.h>
91#elif defined(URCU_ARCH_TILE)
92#include <urcu/uatomic/tile.h>
93#elif defined(URCU_ARCH_HPPA)
94#include <urcu/uatomic/hppa.h>
95#elif defined(URCU_ARCH_M68K)
96#include <urcu/uatomic/m68k.h>
97#elif defined(URCU_ARCH_RISCV)
98#include <urcu/uatomic/riscv.h>
99#else
100#error "Cannot build: unrecognized architecture, see <urcu/arch.h>."
101#endif
102
103#endif /* _URCU_UATOMIC_H */
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