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Add shared memory hit counter example to redbean

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Justine Tunney 2022-10-08 08:39:13 -07:00
parent 38e3ab57a6
commit 8aca94f951
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6 changed files with 114 additions and 29 deletions
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4
tool/net/help.txt
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@ -4509,7 +4509,7 @@ UNIX MODULE
end
end
function Unlock()
old = mem:add(LOCK, -1)
old = mem:fetch_add(LOCK, -1)
if old == 2 then
mem:store(LOCK, 0)
mem:wake(LOCK, 1)
@ -4568,7 +4568,7 @@ UNIX MODULE
single lock which is used to synchronize reads and writes to
that specific map. To make it scale, create additional maps.
unix.Memory:write(data:str[, offset:int[, bytes:int]])
unix.Memory:write([offset:int,] data:str[, bytes:int]])
Writes bytes to memory region.