mirrors/Nim
1
0
Fork 0
mirror of https://github.com/nim-lang/Nim.git synced 2026-02-15 23:54:19 +00:00
Code Issues Packages Projects Releases Wiki Activity

cas(): use an "__atomic" builtin instead of the legacy "__sync" one (#11246)

Browse Source 
"New code should always use the ‘__atomic’ builtins rather than the ‘__sync’ builtins." - https://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html
This commit is contained in:
Ștefan Talpalaru
2019-05-14 21:47:14 +02:00
committed by Andreas Rumpf
parent 0b41f26bd6
commit fa3d19b477
1 changed files with 3 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
lib/system/atomics.nim
View File

@@ -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