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| author | Ștefan Talpalaru <stefantalpalaru@yahoo.com> | 2019-05-14 21:47:14 +0200 |
|---|---|---|
| committer | Andreas Rumpf <rumpf_a@web.de> | 2019-05-14 21:47:14 +0200 |
| commit | fa3d19b4773648744834c67e5b2b9411e062b844 (patch) | |
| tree | 2038794dda2ce4fff62e75ea9976b8575f73d978 /lib/system | |
| parent | 0b41f26bd6cd9f50698e390ee708d5c95bb0afe5 (diff) | |
| download | Nim-fa3d19b4773648744834c67e5b2b9411e062b844.tar.gz | |
cas(): use an "__atomic" builtin instead of the legacy "__sync" one (#11246)
"New code should always use the ‘__atomic’ builtins rather than the ‘__sync’ builtins." - https://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html
Diffstat (limited to 'lib/system')
| -rw-r--r-- | lib/system/atomics.nim | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/system/atomics.nim b/lib/system/atomics.nim index 9111c072a..633348034 100644 --- a/lib/system/atomics.nim +++ b/lib/system/atomics.nim @@ -285,6 +285,9 @@ static int __tcc_cas(int *ptr, int oldVal, int newVal) {.importc: "__tcc_cas", nodecl.} proc cas*[T: bool|int|ptr](p: ptr T; oldValue, newValue: T): bool = tcc_cas(cast[ptr int](p), cast[int](oldValue), cast[int](newValue)) +elif declared(atomicCompareExchangeN): + proc cas*[T: bool|int|ptr](p: ptr T; oldValue, newValue: T): bool = + atomicCompareExchangeN(p, oldValue.unsafeAddr, newValue, false, ATOMIC_SEQ_CST, ATOMIC_SEQ_CST) else: # this is valid for GCC and Intel C++ proc cas*[T: bool|int|ptr](p: ptr T; oldValue, newValue: T): bool |