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sync: use mfence on windows-tcc (#6079)

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Uwe Krüger 2020-08-06 17:31:05 +02:00 committed by GitHub
parent ea76a33b43
commit d63daa0798
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9 changed files with 17 additions and 11 deletions
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2
thirdparty/stdatomic/win/atomic.h vendored
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@ -123,7 +123,7 @@ __CRT_INLINE SHORT _InterlockedExchangeAdd16(SHORT volatile *Addend, SHORT Value
#define InterlockedIncrement64 _InterlockedExchangeAdd64
__CRT_INLINE VOID __faststorefence() {
__asm__ __volatile__ ("sfence");
__asm__ __volatile__ ("mfence");
}
#endif

0
vlib/v/tests/bench/channel_bench_go.go → vlib/sync/bench/channel_bench_go.go
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0
vlib/v/tests/bench/channel_bench_v.v → vlib/sync/bench/channel_bench_v.v
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0
vlib/v/tests/channel_1_test.v → vlib/sync/channel_1_test.v
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0
vlib/v/tests/channel_2_test.v → vlib/sync/channel_2_test.v
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0
vlib/v/tests/channel_3_test.v → vlib/sync/channel_3_test.v
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0
vlib/v/tests/channel_4_test.v → vlib/sync/channel_4_test.v
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2
vlib/v/tests/channel_select_test.v → vlib/sync/channel_select_test.v
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@ -40,7 +40,7 @@ fn test_select() {
go do_send_byte(mut chb)
go do_send_i64(mut chl)
mut channels := [chi, recch, chl, chb]
directions := [false, true, false, false]
directions := [sync.Direction.pop, .push, .pop, .pop]
mut sum := i64(0)
mut rl := i64(0)
mut ri := int(0)

24
vlib/sync/channels.v
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@ -71,6 +71,11 @@ mut:
nxt &Subscription
}
enum Direction {
pop
push
}
struct Channel {
writesem Semaphore // to wake thread that wanted to write, but buffer was full
readsem Semaphore // to wake thread that wanted to read, but buffer was empty
@ -97,17 +102,18 @@ mut: // atomic
}
pub fn new_channel<T>(n u32) &Channel {
st := sizeof(T)
return &Channel{
writesem: new_semaphore_init(if n > 0 { n + 1 } else { 1 })
readsem: new_semaphore_init(if n > 0 { u32(0) } else { 1 })
writesem_im: new_semaphore()
readsem_im: new_semaphore()
objsize: sizeof(T)
objsize: st
queue_length: n
write_free: n
read_avail: 0
ringbuf: if n > 0 { malloc(int(n * sizeof(T))) } else { byteptr(0) }
statusbuf: if n > 0 { vcalloc(int(n * sizeof(u16))) } else { byteptr(0) }
ringbuf: if n > 0 { malloc(int(n * st)) } else { byteptr(0) }
statusbuf: if n > 0 { vcalloc(int(n * 2)) } else { byteptr(0) }
write_subscriber: 0
read_subscriber: 0
}
@ -412,13 +418,13 @@ fn (mut ch Channel) try_pop(dest voidptr, no_block bool) bool {
// Wait `timeout` on any of `channels[i]` until one of them can push (`is_push[i] = true`) or pop (`is_push[i] = false`)
// object referenced by `objrefs[i]`. `timeout = 0` means wait unlimited time
pub fn channel_select(mut channels []&Channel, is_push []bool, mut objrefs []voidptr, timeout time.Duration) int {
assert channels.len == is_push.len
assert is_push.len == objrefs.len
pub fn channel_select(mut channels []&Channel, dir []Direction, mut objrefs []voidptr, timeout time.Duration) int {
assert channels.len == dir.len
assert dir.len == objrefs.len
mut subscr := []Subscription{len: channels.len}
sem := new_semaphore()
for i, ch in channels {
if is_push[i] {
if dir[i] == .push {
mut null16 := u16(0)
for !C.atomic_compare_exchange_weak_u16(&ch.write_sub_mtx, &null16, u16(1)) {
null16 = u16(0)
@ -453,7 +459,7 @@ pub fn channel_select(mut channels []&Channel, is_push []bool, mut objrefs []voi
if i >= channels.len {
i -= channels.len
}
if is_push[i] {
if dir[i] == .push {
if channels[i].try_push(objrefs[i], true) {
event_idx = i
goto restore
@ -477,7 +483,7 @@ pub fn channel_select(mut channels []&Channel, is_push []bool, mut objrefs []voi
restore:
// reset subscribers
for i, ch in channels {
if is_push[i] {
if dir[i] == .push {
mut null16 := u16(0)
for !C.atomic_compare_exchange_weak_u16(&ch.write_sub_mtx, &null16, u16(1)) {
null16 = u16(0)