| // SPDX-License-Identifier: Apache-2.0 OR MIT |
| |
| // ----------------------------------------------------------------------------- |
| // Lock-free implementations |
| |
| #[cfg(not(any( |
| all( |
| portable_atomic_no_atomic_load_store, |
| not(all(target_arch = "bpf", not(feature = "critical-section"))), |
| ), |
| target_arch = "avr", |
| target_arch = "msp430", |
| )))] |
| #[cfg_attr( |
| portable_atomic_no_cfg_target_has_atomic, |
| cfg(not(all( |
| any( |
| target_arch = "riscv32", |
| target_arch = "riscv64", |
| feature = "critical-section", |
| portable_atomic_unsafe_assume_single_core, |
| ), |
| portable_atomic_no_atomic_cas, |
| ))) |
| )] |
| #[cfg_attr( |
| not(portable_atomic_no_cfg_target_has_atomic), |
| cfg(not(all( |
| any( |
| target_arch = "riscv32", |
| target_arch = "riscv64", |
| feature = "critical-section", |
| portable_atomic_unsafe_assume_single_core, |
| ), |
| not(target_has_atomic = "ptr"), |
| ))) |
| )] |
| mod core_atomic; |
| |
| // MSP430 |
| #[cfg(target_arch = "msp430")] |
| pub(crate) mod msp430; |
| |
| // RISC-V without A-extension |
| #[cfg(any(test, not(feature = "critical-section")))] |
| #[cfg_attr( |
| portable_atomic_no_cfg_target_has_atomic, |
| cfg(any( |
| all(test, not(any(miri, portable_atomic_sanitize_thread))), |
| portable_atomic_no_atomic_cas, |
| )) |
| )] |
| #[cfg_attr( |
| not(portable_atomic_no_cfg_target_has_atomic), |
| cfg(any( |
| all(test, not(any(miri, portable_atomic_sanitize_thread))), |
| not(target_has_atomic = "ptr"), |
| )) |
| )] |
| #[cfg(any(target_arch = "riscv32", target_arch = "riscv64"))] |
| mod riscv; |
| |
| // x86-specific optimizations |
| // Miri and Sanitizer do not support inline assembly. |
| #[cfg(all( |
| any(target_arch = "x86", target_arch = "x86_64"), |
| not(any(miri, portable_atomic_sanitize_thread)), |
| any(not(portable_atomic_no_asm), portable_atomic_unstable_asm), |
| ))] |
| mod x86; |
| |
| // 64-bit atomic implementations on 32-bit architectures |
| #[cfg(any(target_arch = "arm", target_arch = "riscv32"))] |
| mod atomic64; |
| |
| // 128-bit atomic implementations on 64-bit architectures |
| #[cfg(any( |
| target_arch = "aarch64", |
| target_arch = "arm64ec", |
| target_arch = "powerpc64", |
| target_arch = "riscv64", |
| target_arch = "s390x", |
| target_arch = "x86_64", |
| ))] |
| mod atomic128; |
| |
| // ----------------------------------------------------------------------------- |
| // Lock-based fallback implementations |
| |
| #[cfg(feature = "fallback")] |
| #[cfg_attr(portable_atomic_no_cfg_target_has_atomic, cfg(not(portable_atomic_no_atomic_cas)))] |
| #[cfg_attr(not(portable_atomic_no_cfg_target_has_atomic), cfg(target_has_atomic = "ptr"))] |
| #[cfg(any( |
| test, |
| not(any( |
| all( |
| target_arch = "aarch64", |
| any(not(portable_atomic_no_asm), portable_atomic_unstable_asm), |
| ), |
| all(target_arch = "arm64ec", portable_atomic_unstable_asm_experimental_arch), |
| all( |
| target_arch = "x86_64", |
| any(not(portable_atomic_no_asm), portable_atomic_unstable_asm), |
| any(target_feature = "cmpxchg16b", portable_atomic_target_feature = "cmpxchg16b"), |
| ), |
| all( |
| target_arch = "riscv64", |
| not(portable_atomic_no_asm), |
| any( |
| target_feature = "experimental-zacas", |
| portable_atomic_target_feature = "experimental-zacas", |
| ), |
| ), |
| all( |
| target_arch = "powerpc64", |
| portable_atomic_unstable_asm_experimental_arch, |
| any( |
| target_feature = "quadword-atomics", |
| portable_atomic_target_feature = "quadword-atomics", |
| ), |
| ), |
| all(target_arch = "s390x", portable_atomic_unstable_asm_experimental_arch), |
| )) |
| ))] |
| mod fallback; |
| |
| // ----------------------------------------------------------------------------- |
| // Critical section based fallback implementations |
| |
| // On AVR, we always use critical section based fallback implementation. |
| // AVR can be safely assumed to be single-core, so this is sound. |
| // https://github.com/llvm/llvm-project/blob/llvmorg-19.1.0/llvm/lib/Target/AVR/AVRExpandPseudoInsts.cpp#L1074 |
| // MSP430 as well. |
| #[cfg(any( |
| all(test, target_os = "none"), |
| portable_atomic_unsafe_assume_single_core, |
| feature = "critical-section", |
| target_arch = "avr", |
| target_arch = "msp430", |
| ))] |
| #[cfg_attr(portable_atomic_no_cfg_target_has_atomic, cfg(any(test, portable_atomic_no_atomic_cas)))] |
| #[cfg_attr( |
| not(portable_atomic_no_cfg_target_has_atomic), |
| cfg(any(test, not(target_has_atomic = "ptr"))) |
| )] |
| #[cfg(any( |
| target_arch = "arm", |
| target_arch = "avr", |
| target_arch = "msp430", |
| target_arch = "riscv32", |
| target_arch = "riscv64", |
| target_arch = "xtensa", |
| feature = "critical-section", |
| ))] |
| mod interrupt; |
| |
| // ----------------------------------------------------------------------------- |
| // Atomic float implementations |
| |
| #[cfg(feature = "float")] |
| #[allow(clippy::float_arithmetic)] |
| pub(crate) mod float; |
| |
| // ----------------------------------------------------------------------------- |
| |
| #[cfg(not(any( |
| portable_atomic_no_atomic_load_store, |
| target_arch = "avr", |
| target_arch = "msp430", |
| )))] |
| #[cfg_attr( |
| portable_atomic_no_cfg_target_has_atomic, |
| cfg(not(all( |
| any( |
| target_arch = "riscv32", |
| target_arch = "riscv64", |
| feature = "critical-section", |
| portable_atomic_unsafe_assume_single_core, |
| ), |
| portable_atomic_no_atomic_cas, |
| ))) |
| )] |
| #[cfg_attr( |
| not(portable_atomic_no_cfg_target_has_atomic), |
| cfg(not(all( |
| any( |
| target_arch = "riscv32", |
| target_arch = "riscv64", |
| feature = "critical-section", |
| portable_atomic_unsafe_assume_single_core, |
| ), |
| not(target_has_atomic = "ptr"), |
| ))) |
| )] |
| items! { |
| pub(crate) use self::core_atomic::{ |
| AtomicI16, AtomicI32, AtomicI8, AtomicIsize, AtomicPtr, AtomicU16, AtomicU32, AtomicU8, |
| AtomicUsize, |
| }; |
| #[cfg_attr( |
| portable_atomic_no_cfg_target_has_atomic, |
| cfg(any( |
| not(portable_atomic_no_atomic_64), |
| not(any(target_pointer_width = "16", target_pointer_width = "32")), |
| )) |
| )] |
| #[cfg_attr( |
| not(portable_atomic_no_cfg_target_has_atomic), |
| cfg(any( |
| target_has_atomic = "64", |
| not(any(target_pointer_width = "16", target_pointer_width = "32")), |
| )) |
| )] |
| pub(crate) use self::core_atomic::{AtomicI64, AtomicU64}; |
| } |
| // bpf |
| #[cfg(all( |
| target_arch = "bpf", |
| portable_atomic_no_atomic_load_store, |
| not(feature = "critical-section"), |
| ))] |
| pub(crate) use self::core_atomic::{AtomicI64, AtomicIsize, AtomicPtr, AtomicU64, AtomicUsize}; |
| |
| // RISC-V without A-extension & !(assume single core | critical section) |
| #[cfg(not(any(portable_atomic_unsafe_assume_single_core, feature = "critical-section")))] |
| #[cfg_attr(portable_atomic_no_cfg_target_has_atomic, cfg(portable_atomic_no_atomic_cas))] |
| #[cfg_attr(not(portable_atomic_no_cfg_target_has_atomic), cfg(not(target_has_atomic = "ptr")))] |
| #[cfg(any(target_arch = "riscv32", target_arch = "riscv64"))] |
| items! { |
| pub(crate) use self::riscv::{ |
| AtomicI16, AtomicI32, AtomicI8, AtomicIsize, AtomicPtr, AtomicU16, AtomicU32, AtomicU8, |
| AtomicUsize, |
| }; |
| #[cfg(target_arch = "riscv64")] |
| pub(crate) use self::riscv::{AtomicI64, AtomicU64}; |
| } |
| |
| // no core atomic CAS & (assume single core | critical section) => critical section based fallback |
| #[cfg(any( |
| portable_atomic_unsafe_assume_single_core, |
| feature = "critical-section", |
| target_arch = "avr", |
| target_arch = "msp430", |
| ))] |
| #[cfg_attr(portable_atomic_no_cfg_target_has_atomic, cfg(portable_atomic_no_atomic_cas))] |
| #[cfg_attr(not(portable_atomic_no_cfg_target_has_atomic), cfg(not(target_has_atomic = "ptr")))] |
| items! { |
| pub(crate) use self::interrupt::{ |
| AtomicI16, AtomicI8, AtomicIsize, AtomicPtr, AtomicU16, AtomicU8, AtomicUsize, |
| }; |
| #[cfg(any(not(target_pointer_width = "16"), feature = "fallback"))] |
| pub(crate) use self::interrupt::{AtomicI32, AtomicU32}; |
| #[cfg(any( |
| not(any(target_pointer_width = "16", target_pointer_width = "32")), |
| feature = "fallback", |
| ))] |
| pub(crate) use self::interrupt::{AtomicI64, AtomicU64}; |
| #[cfg(feature = "fallback")] |
| pub(crate) use self::interrupt::{AtomicI128, AtomicU128}; |
| } |
| |
| // no core (64-bit | 128-bit) atomic & has CAS => use lock-base fallback |
| #[cfg(feature = "fallback")] |
| #[cfg_attr(portable_atomic_no_cfg_target_has_atomic, cfg(not(portable_atomic_no_atomic_cas)))] |
| #[cfg_attr(not(portable_atomic_no_cfg_target_has_atomic), cfg(target_has_atomic = "ptr"))] |
| items! { |
| #[cfg(not(any( |
| all( |
| target_arch = "arm", |
| not(any(miri, portable_atomic_sanitize_thread)), |
| any(not(portable_atomic_no_asm), portable_atomic_unstable_asm), |
| any(target_os = "linux", target_os = "android"), |
| not(any(target_feature = "v6", portable_atomic_target_feature = "v6")), |
| not(portable_atomic_no_outline_atomics), |
| ), |
| all( |
| target_arch = "riscv32", |
| not(any(miri, portable_atomic_sanitize_thread)), |
| not(portable_atomic_no_asm), |
| not(portable_atomic_pre_llvm_19), |
| any( |
| target_feature = "experimental-zacas", |
| portable_atomic_target_feature = "experimental-zacas", |
| all( |
| feature = "fallback", |
| not(portable_atomic_no_outline_atomics), |
| any(test, portable_atomic_outline_atomics), // TODO(riscv): currently disabled by default |
| any(target_os = "linux", target_os = "android"), |
| ), |
| ), |
| ), |
| )))] |
| #[cfg_attr(portable_atomic_no_cfg_target_has_atomic, cfg(portable_atomic_no_atomic_64))] |
| #[cfg_attr(not(portable_atomic_no_cfg_target_has_atomic), cfg(not(target_has_atomic = "64")))] |
| pub(crate) use self::fallback::{AtomicI64, AtomicU64}; |
| #[cfg(not(any( |
| all( |
| target_arch = "aarch64", |
| any(not(portable_atomic_no_asm), portable_atomic_unstable_asm), |
| ), |
| all(target_arch = "arm64ec", portable_atomic_unstable_asm_experimental_arch), |
| all( |
| target_arch = "x86_64", |
| not(all( |
| any(miri, portable_atomic_sanitize_thread), |
| portable_atomic_no_cmpxchg16b_intrinsic, |
| )), |
| any(not(portable_atomic_no_asm), portable_atomic_unstable_asm), |
| any( |
| target_feature = "cmpxchg16b", |
| portable_atomic_target_feature = "cmpxchg16b", |
| all( |
| feature = "fallback", |
| not(portable_atomic_no_outline_atomics), |
| not(any(target_env = "sgx", miri)), |
| ), |
| ), |
| ), |
| all( |
| target_arch = "riscv64", |
| not(portable_atomic_no_asm), |
| not(portable_atomic_pre_llvm_19), |
| any( |
| target_feature = "experimental-zacas", |
| portable_atomic_target_feature = "experimental-zacas", |
| all( |
| feature = "fallback", |
| not(portable_atomic_no_outline_atomics), |
| any(test, portable_atomic_outline_atomics), // TODO(riscv): currently disabled by default |
| any(target_os = "linux", target_os = "android"), |
| not(any(miri, portable_atomic_sanitize_thread)), |
| ), |
| ), |
| ), |
| all( |
| target_arch = "powerpc64", |
| portable_atomic_unstable_asm_experimental_arch, |
| any( |
| target_feature = "quadword-atomics", |
| portable_atomic_target_feature = "quadword-atomics", |
| all( |
| feature = "fallback", |
| not(portable_atomic_no_outline_atomics), |
| portable_atomic_outline_atomics, // TODO(powerpc64): currently disabled by default |
| any( |
| all( |
| target_os = "linux", |
| any( |
| target_env = "gnu", |
| all( |
| any(target_env = "musl", target_env = "ohos"), |
| not(target_feature = "crt-static"), |
| ), |
| portable_atomic_outline_atomics, |
| ), |
| ), |
| target_os = "android", |
| target_os = "freebsd", |
| all(target_os = "openbsd", portable_atomic_outline_atomics), |
| ), |
| not(any(miri, portable_atomic_sanitize_thread)), |
| ), |
| ), |
| ), |
| all(target_arch = "s390x", portable_atomic_unstable_asm_experimental_arch), |
| )))] |
| pub(crate) use self::fallback::{AtomicI128, AtomicU128}; |
| } |
| |
| // 64-bit atomics (platform-specific) |
| // pre-v6 Arm Linux |
| #[cfg(feature = "fallback")] |
| #[cfg(all( |
| target_arch = "arm", |
| not(any(miri, portable_atomic_sanitize_thread)), |
| any(not(portable_atomic_no_asm), portable_atomic_unstable_asm), |
| any(target_os = "linux", target_os = "android"), |
| not(any(target_feature = "v6", portable_atomic_target_feature = "v6")), |
| not(portable_atomic_no_outline_atomics), |
| ))] |
| #[cfg_attr(portable_atomic_no_cfg_target_has_atomic, cfg(portable_atomic_no_atomic_64))] |
| #[cfg_attr(not(portable_atomic_no_cfg_target_has_atomic), cfg(not(target_has_atomic = "64")))] |
| pub(crate) use self::atomic64::arm_linux::{AtomicI64, AtomicU64}; |
| #[cfg(all( |
| target_arch = "riscv32", |
| not(any(miri, portable_atomic_sanitize_thread)), |
| not(portable_atomic_no_asm), |
| not(portable_atomic_pre_llvm_19), |
| any( |
| target_feature = "experimental-zacas", |
| portable_atomic_target_feature = "experimental-zacas", |
| all( |
| feature = "fallback", |
| not(portable_atomic_no_outline_atomics), |
| any(test, portable_atomic_outline_atomics), // TODO(riscv): currently disabled by default |
| any(target_os = "linux", target_os = "android"), |
| ), |
| ), |
| ))] |
| pub(crate) use self::atomic64::riscv32::{AtomicI64, AtomicU64}; |
| |
| // 128-bit atomics (platform-specific) |
| // AArch64 |
| #[cfg(any( |
| all(target_arch = "aarch64", any(not(portable_atomic_no_asm), portable_atomic_unstable_asm)), |
| all(target_arch = "arm64ec", portable_atomic_unstable_asm_experimental_arch) |
| ))] |
| pub(crate) use self::atomic128::aarch64::{AtomicI128, AtomicU128}; |
| // x86_64 & (cmpxchg16b | outline-atomics) |
| #[cfg(all( |
| target_arch = "x86_64", |
| not(all(any(miri, portable_atomic_sanitize_thread), portable_atomic_no_cmpxchg16b_intrinsic)), |
| any(not(portable_atomic_no_asm), portable_atomic_unstable_asm), |
| any( |
| target_feature = "cmpxchg16b", |
| portable_atomic_target_feature = "cmpxchg16b", |
| all( |
| feature = "fallback", |
| not(portable_atomic_no_outline_atomics), |
| not(any(target_env = "sgx", miri)), |
| ), |
| ), |
| ))] |
| pub(crate) use self::atomic128::x86_64::{AtomicI128, AtomicU128}; |
| // riscv64 & zacas |
| #[cfg(all( |
| target_arch = "riscv64", |
| not(portable_atomic_no_asm), |
| not(portable_atomic_pre_llvm_19), |
| any( |
| target_feature = "experimental-zacas", |
| portable_atomic_target_feature = "experimental-zacas", |
| all( |
| feature = "fallback", |
| not(portable_atomic_no_outline_atomics), |
| any(test, portable_atomic_outline_atomics), // TODO(riscv): currently disabled by default |
| any(target_os = "linux", target_os = "android"), |
| not(any(miri, portable_atomic_sanitize_thread)), |
| ), |
| ), |
| ))] |
| pub(crate) use self::atomic128::riscv64::{AtomicI128, AtomicU128}; |
| // powerpc64 & (pwr8 | outline-atomics) |
| #[cfg(all( |
| target_arch = "powerpc64", |
| portable_atomic_unstable_asm_experimental_arch, |
| any( |
| target_feature = "quadword-atomics", |
| portable_atomic_target_feature = "quadword-atomics", |
| all( |
| feature = "fallback", |
| not(portable_atomic_no_outline_atomics), |
| portable_atomic_outline_atomics, // TODO(powerpc64): currently disabled by default |
| any( |
| all( |
| target_os = "linux", |
| any( |
| target_env = "gnu", |
| all( |
| any(target_env = "musl", target_env = "ohos"), |
| not(target_feature = "crt-static"), |
| ), |
| portable_atomic_outline_atomics, |
| ), |
| ), |
| target_os = "android", |
| target_os = "freebsd", |
| all(target_os = "openbsd", portable_atomic_outline_atomics), |
| ), |
| not(any(miri, portable_atomic_sanitize_thread)), |
| ), |
| ), |
| ))] |
| pub(crate) use self::atomic128::powerpc64::{AtomicI128, AtomicU128}; |
| // s390x |
| #[cfg(all(target_arch = "s390x", portable_atomic_unstable_asm_experimental_arch))] |
| pub(crate) use self::atomic128::s390x::{AtomicI128, AtomicU128}; |
