Are you looking for replace and v0.0.0?
https://github.com/golang/go/wiki/Modules#when-should-i-use-the-replace-directive
--
You received this message because you are subscribed to the Google Groups
"golang-nuts" group.
To unsubscribe from this group and stop receiving emails from it, send an
You actually only need a cas and a condition variable (technically the
condition in Go requires a backing lock, but if you have wait/notify it isn’t
needed).
You can read this
https://code.woboq.org/userspace/glibc/nptl/pthread_rwlock_common.c.html
On Tue, Dec 3, 2019 at 7:20 PM Robert Johnstone wrote:
>
> The section on passing pointer to C in the cgo documentation is quite clear
> that letting C hold pointer to Go memory is not allowed. I'd like to better
> understand the limitation. Frankly, because of the architecture of a system
>
Hello,
The section on passing pointer to C in the cgo documentation is quite clear
that letting C hold pointer to Go memory is not allowed. I'd like to
better understand the limitation. Frankly, because of the architecture of
a system I'm working on, the inability to transport pointers is
On Tue, Dec 3, 2019 at 6:54 PM Liam wrote:
>
> Busy means would-block, yes.
>
> Burak thanks, but that doesn't work for read-lock.
You are right, I keep reading it as Lock instead of RLock.
Here's another attempt at solving it:
https://play.golang.org/p/az3hnyIwe47
>
> On Tuesday, December
Busy means would-block, yes.
Burak thanks, but that doesn't work for read-lock.
On Tuesday, December 3, 2019 at 5:39:48 PM UTC-8, Robert Engels wrote:
>
> It depends then, because technically the Go RW lock queues readers behind
> a waiting writer so “busy” is somewhat undefined. If “busy”
It depends then, because technically the Go RW lock queues readers behind a
waiting writer so “busy” is somewhat undefined. If “busy” means “would block”
you can still do it - I’ll post the code tonight.
> On Dec 3, 2019, at 6:49 PM, Robert Engels wrote:
>
> I would use an atomic and a lock
On Tue, Dec 3, 2019 at 6:31 PM Liam wrote:
>
> Erm... not seeing how cas works to try a read-lock, which admits multiple
> callers...
Something like this should work:
TryLock:
if CompareAndSwap(,0,1) {
door.Lock()
return true
}
return false
Unlock:
door.Unlock()
Store(,0)
>
> On
Erm... not seeing how cas works to try a read-lock, which admits multiple
callers...
On Tuesday, December 3, 2019 at 5:12:08 PM UTC-8, Robert Engels wrote:
>
> Can’t code on the phone but a cas on the atomic then take the lock. But if
> you never need to block you don’t even need the lock.
>
>
Can’t code on the phone but a cas on the atomic then take the lock. But if you
never need to block you don’t even need the lock.
> On Dec 3, 2019, at 6:52 PM, Liam Breck wrote:
>
>
> Which looks like...?
>
>> On Tue, Dec 3, 2019, 4:50 PM Robert Engels wrote:
>> I would use an atomic and a
Which looks like...?
On Tue, Dec 3, 2019, 4:50 PM Robert Engels wrote:
> I would use an atomic and a lock instead of two locks.
>
> > On Dec 3, 2019, at 6:35 PM, burak serdar wrote:
> >
> > On Tue, Dec 3, 2019 at 5:21 PM Liam Breck
> wrote:
> >>
> >> I have a problem that is trivially solved
I would use an atomic and a lock instead of two locks.
> On Dec 3, 2019, at 6:35 PM, burak serdar wrote:
>
> On Tue, Dec 3, 2019 at 5:21 PM Liam Breck wrote:
>>
>> I have a problem that is trivially solved via
>>
>> door sync.RWMutex
>>
>> func Reader() T {
>> if !door.TryRLock() { //
On Tue, Dec 3, 2019 at 5:21 PM Liam Breck wrote:
>
> I have a problem that is trivially solved via
>
> door sync.RWMutex
>
> func Reader() T {
>if !door.TryRLock() { // missing in stdlib :-(
> return busy
>}
>defer door.RUnlock()
>...
> }
>
> func Writer() {
>door.Lock()
I have a problem that is trivially solved via
door sync.RWMutex
func Reader() T {
if !door.TryRLock() { // missing in stdlib :-(
return busy
}
defer door.RUnlock()
...
}
func Writer() {
door.Lock()
defer door.Unlock()
...
}
How does one achieve this in Go?
--
You
When working with Go modules, what is the idiomatic way to deal with
project-local imports (i.e. directories that are not supposed to be checked
out separately from everything else. A simple example would be something
like this:
project/
library.go
example/
example.go
Here,
On Tue, Dec 3, 2019 at 12:29 AM FAN DEAR wrote:
>
> typedef struct { void *t; void *v; } GoInterface;
>
>
> What is *t and *v?
See https://research.swtch.com/interfaces.
Ian
> 在 2019年12月3日星期二 UTC+8上午2:41:36，Ian Lance Taylor写道：
>>
>> On Mon, Dec 2, 2019 at 9:57 AM FAN DEAR wrote:
>> >
>> >
>>
At work back in the 80s and 90s we used a 4GL developement tool (with name
Delta/ADS) to generate Cobol code. The most frequently used part of it was
a generator fo control break logic, meaning Cobol programs that processed
sorted sequential input data.
Now I built something similar (simpler)
typedef struct { void *t; void *v; } GoInterface;
What is *t and *v?
在 2019年12月3日星期二 UTC+8上午2:41:36，Ian Lance Taylor写道：
>
> On Mon, Dec 2, 2019 at 9:57 AM FAN DEAR >
> wrote:
> >
> >
> > How to use add2 function, i am very troubled.
>
> On this mailing list please post code as ordinary
18 matches
Mail list logo
