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package sync
import "intrinsics"
Ordering :: enum {
Relaxed, // Monotonic
Release,
Acquire,
Acquire_Release,
Sequentially_Consistent,
}
strongest_failure_ordering :: inline proc "contextless" (order: Ordering) -> Ordering {
using Ordering;
#complete switch order {
case Relaxed: return Relaxed;
case Release: return Relaxed;
case Acquire: return Acquire;
case Acquire_Release: return Acquire;
case Sequentially_Consistent: return Sequentially_Consistent;
}
return Relaxed;
}
fence :: inline proc "contextless" (order: Ordering) {
using Ordering;
#complete switch order {
case Relaxed: panic("there is no such thing as a relaxed fence");
case Release: intrinsics.atomic_fence_rel();
case Acquire: intrinsics.atomic_fence_acq();
case Acquire_Release: intrinsics.atomic_fence_acqrel();
case Sequentially_Consistent: intrinsics.atomic_fence();
case: panic("unknown order");
}
}
atomic_store :: inline proc "contextless" (dst: ^$T, val: T, order: Ordering) {
using Ordering;
#complete switch order {
case Relaxed: intrinsics.atomic_store_relaxed(dst, val);
case Release: intrinsics.atomic_store_rel(dst, val);
case Sequentially_Consistent: intrinsics.atomic_store(dst, val);
case Acquire: panic("there is not such thing as an acquire store");
case Acquire_Release: panic("there is not such thing as an acquire/release store");
case: panic("unknown order");
}
}
atomic_load :: inline proc "contextless" (dst: ^$T, order: Ordering) -> T {
using Ordering;
#complete switch order {
case Relaxed: return intrinsics.atomic_load_relaxed(dst);
case Acquire: return intrinsics.atomic_load_acq(dst);
case Sequentially_Consistent: return intrinsics.atomic_load(dst);
case Release: panic("there is no such thing as a release load");
case Acquire_Release: panic("there is no such thing as an acquire/release load");
}
panic("unknown order");
return T{};
}
atomic_swap :: inline proc "contextless" (dst: ^$T, val: T, order: Ordering) -> T {
using Ordering;
#complete switch order {
case Relaxed: return intrinsics.atomic_xchg_relaxed(dst, val);
case Release: return intrinsics.atomic_xchg_rel(dst, val);
case Acquire: return intrinsics.atomic_xchg_acq(dst, val);
case Acquire_Release: return intrinsics.atomic_xchg_acqrel(dst, val);
case Sequentially_Consistent: return intrinsics.atomic_xchg(dst, val);
}
panic("unknown order");
return T{};
}
atomic_compare_exchange :: inline proc "contextless" (dst: ^$T, old, new: T, success, failure: Ordering) -> (val: T, ok: bool) {
using Ordering;
switch failure {
case Relaxed:
switch success {
case Relaxed: return intrinsics.atomic_cxchg_relaxed(dst, old, new);
case Acquire: return intrinsics.atomic_cxchg_acq_failrelaxed(dst, old, new);
case Acquire_Release: return intrinsics.atomic_cxchg_acqrel_failrelaxed(dst, old, new);
case Sequentially_Consistent: return intrinsics.atomic_cxchg_failrelaxed(dst, old, new);
case: panic("an unknown ordering combination");
}
case Acquire:
switch success {
case Acquire: return intrinsics.atomic_cxchg_acq(dst, old, new);
case: panic("an unknown ordering combination");
}
case Sequentially_Consistent:
switch success {
case Sequentially_Consistent: return intrinsics.atomic_cxchg(dst, old, new);
case: panic("an unknown ordering combination");
}
case Acquire_Release:
panic("there is not such thing as an acquire/release failure ordering");
case Release:
panic("there is not such thing as an release failure ordering");
}
return T{}, false;
}
atomic_add :: inline proc "contextless" (dst: ^$T, val: T, order: Ordering) -> T {
using Ordering;
#complete switch order {
case Relaxed: return intrinsics.atomic_add_relaxed(dst, val);
case Release: return intrinsics.atomic_add_rel(dst, val);
case Acquire: return intrinsics.atomic_add_acq(dst, val);
case Acquire_Release: return intrinsics.atomic_add_acqrel(dst, val);
case Sequentially_Consistent: return intrinsics.atomic_add(dst, val);
}
panic("unknown order");
return T{};
}
atomic_sub :: inline proc "contextless" (dst: ^$T, val: T, order: Ordering) -> T {
using Ordering;
#complete switch order {
case Relaxed: return intrinsics.atomic_sub_relaxed(dst, val);
case Release: return intrinsics.atomic_sub_rel(dst, val);
case Acquire: return intrinsics.atomic_sub_acq(dst, val);
case Acquire_Release: return intrinsics.atomic_sub_acqrel(dst, val);
case Sequentially_Consistent: return intrinsics.atomic_sub(dst, val);
}
panic("unknown order");
return T{};
}
atomic_and :: inline proc "contextless" (dst: ^$T, val: T, order: Ordering) -> T {
using Ordering;
#complete switch order {
case Relaxed: return intrinsics.atomic_and_relaxed(dst, val);
case Release: return intrinsics.atomic_and_rel(dst, val);
case Acquire: return intrinsics.atomic_and_acq(dst, val);
case Acquire_Release: return intrinsics.atomic_and_acqrel(dst, val);
case Sequentially_Consistent: return intrinsics.atomic_and(dst, val);
}
panic("unknown order");
return T{};
}
atomic_nand :: inline proc "contextless" (dst: ^$T, val: T, order: Ordering) -> T {
using Ordering;
#complete switch order {
case Relaxed: return intrinsics.atomic_nand_relaxed(dst, val);
case Release: return intrinsics.atomic_nand_rel(dst, val);
case Acquire: return intrinsics.atomic_nand_acq(dst, val);
case Acquire_Release: return intrinsics.atomic_nand_acqrel(dst, val);
case Sequentially_Consistent: return intrinsics.atomic_nand(dst, val);
}
panic("unknown order");
return T{};
}
atomic_or :: inline proc "contextless" (dst: ^$T, val: T, order: Ordering) -> T {
using Ordering;
#complete switch order {
case Relaxed: return intrinsics.atomic_or_relaxed(dst, val);
case Release: return intrinsics.atomic_or_rel(dst, val);
case Acquire: return intrinsics.atomic_or_acq(dst, val);
case Acquire_Release: return intrinsics.atomic_or_acqrel(dst, val);
case Sequentially_Consistent: return intrinsics.atomic_or(dst, val);
}
panic("unknown order");
return T{};
}
atomic_xor :: inline proc "contextless" (dst: ^$T, val: T, order: Ordering) -> T {
using Ordering;
#complete switch order {
case Relaxed: return intrinsics.atomic_xor_relaxed(dst, val);
case Release: return intrinsics.atomic_xor_rel(dst, val);
case Acquire: return intrinsics.atomic_xor_acq(dst, val);
case Acquire_Release: return intrinsics.atomic_xor_acqrel(dst, val);
case Sequentially_Consistent: return intrinsics.atomic_xor(dst, val);
}
panic("unknown order");
return T{};
}
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