72 lines
2.0 KiB
V
72 lines
2.0 KiB
V
module atomic2
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import sync
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/*
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Implements the atomic operations. For now TCC does not support
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the atomic versions on nix so it uses locks to simulate the same behavor.
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On windows tcc can simulate with other atomic operations.
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The @VROOT/thirdparty/stdatomic contains compability header files
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for stdatomic that supports both nix, windows and c++.
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This implementations should be regarded as alpha stage and be
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further tested.
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*/
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#flag windows -I @VROOT/thirdparty/stdatomic/win
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#flag linux -I @VROOT/thirdparty/stdatomic/nix
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#flag darwin -I @VROOT/thirdparty/stdatomic/nix
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#flag freebsd -I @VROOT/thirdparty/stdatomic/nix
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#flag solaris -I @VROOT/thirdparty/stdatomic/nix
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$if linux {
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$if tinyc {
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// most Linux distributions have /usr/lib/libatomic.so, but Ubuntu uses gcc version specific dir
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#flag -L/usr/lib/gcc/x86_64-linux-gnu/6 -L/usr/lib/gcc/x86_64-linux-gnu/7 -L/usr/lib/gcc/x86_64-linux-gnu/8 -L/usr/lib/gcc/x86_64-linux-gnu/9 -latomic
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}
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}
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#include <atomic.h>
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// add_u64 adds provided delta as an atomic operation
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pub fn add_u64(ptr &u64, delta int) bool {
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res := C.atomic_fetch_add_u64(ptr, delta)
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return res == 0
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}
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// sub_u64 subtracts provided delta as an atomic operation
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pub fn sub_u64(ptr &u64, delta int) bool {
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res := C.atomic_fetch_sub_u64(ptr, delta)
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return res == 0
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}
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// add_i64 adds provided delta as an atomic operation
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pub fn add_i64(ptr &i64, delta int) bool {
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res := C.atomic_fetch_add_u64(ptr, delta)
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return res == 0
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}
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// add_i64 subtracts provided delta as an atomic operation
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pub fn sub_i64(ptr &i64, delta int) bool {
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res := C.atomic_fetch_sub_u64(ptr, delta)
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return res == 0
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}
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// atomic store/load operations have to be used when there might be another concurrent access
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// atomicall set a value
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pub fn store_u64(ptr &u64, val u64) {
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C.atomic_store_u64(ptr, val)
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}
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// atomicall get a value
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pub fn load_u64(ptr &u64) u64 {
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return C.atomic_load_u64(ptr)
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}
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// atomicall set a value
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pub fn store_i64(ptr &i64, val i64) {
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C.atomic_store_u64(ptr, val)
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}
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// atomicall get a value
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pub fn load_i64(ptr &i64) i64 {
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return i64(C.atomic_load_u64(ptr))
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}
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