search for: goroutine

...understand the question, but the guestfish mount-local-run > command will block guestfish until another process runs > 'fusermount -u /mntpoint' (or better, 'guestunmount /mntpoint'). I understand that guestfish process will be locked. But in case of go that uses lightweight goroutines, is that possible to replace fork with goroutine ? -- Vasiliy Tolstov, e-mail: v.tolstov@selfip.ru jabber: vase@selfip.ru

...pass the plain int > > to syscall.Select. (2) Turning an fd into an os.File causes golang to > > set the blocking flag which is deeply unhelpful. > > FWIW, using non-blocking FDs and syscall.Select is not normal best > practice for Go, where the expected model would be to use goroutines > with the file in blocking mode. Right, however I couldn't find any documentation about how to integrate a C library with that mechanism. Does libvirt-go do anything like this? Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming a...

..., and it seems you were right - it makes much more sense to have regular C (and assembly) code for handling coroutines. For instance, I'd otherwise would have to make an assumption about the threading model the platform has (or assume there are no threads at all, which prevents me from allowing goroutine like ("run parallel till you need to write to a channel") behavior). Right now I'm sort-of dogfooding my work by trying to get Go running on dragonegg. I've discovered some small issues already (for instance I need to save R10 somewhere when compiling a function with a nest param...

Hi. I'm try to use guestfish inside golang (extract some files from image and create squashfs from root). Now i can't understand how can i work with mount-local/mount-local-run. Where i can specify what partition i'm export to local? Does i need firstly mount /dev/sda1 to / for example and after that run mount-local /tmp/xxx ? Second - i'm work with guestfish via writing to stdin

...Select. (2) Turning an fd into an os.File causes golang to > > > > set the blocking flag which is deeply unhelpful. > > > > > > FWIW, using non-blocking FDs and syscall.Select is not normal best > > > practice for Go, where the expected model would be to use goroutines > > > with the file in blocking mode. > > > > Right, however I couldn't find any documentation about how to > > integrate a C library with that mechanism. Does libvirt-go do > > anything like this? > > What's the intended usage of the FD ? I was t...

Hi all, I'm using libvirt-go and I following code to listen for lifecycle events: func event_listen() { log.Printf("event_listen %s", conf.Libvirt.LocalUrl) hv, err := libvirt.NewConnect(conf.Libvirt.LocalUrl) lifecycleCallback := func(c *libvirt.Connect, d *libvirt.Domain, event *libvirt.DomainEventLifecycle) { event_message(c, d, "lifecycle", event)

On 08/10/2011 11:03 AM, Sanjoy Das wrote: > Hi! > > Attached my pre-midterm GSoC work for segmented stacks for review (with > the required fixes). Nice work! + extern bool EnableSegmentedStacks; Can you add a comment like the other declarations? I think the patch looks good. There are possible improvements, but the patch is already in an state where it can be tested and extended

...reasons: (1) We have to pass the plain int > to syscall.Select. (2) Turning an fd into an os.File causes golang to > set the blocking flag which is deeply unhelpful. FWIW, using non-blocking FDs and syscall.Select is not normal best practice for Go, where the expected model would be to use goroutines with the file in blocking mode. Regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|

...gt; > to syscall.Select. (2) Turning an fd into an os.File causes golang to > > > set the blocking flag which is deeply unhelpful. > > > > FWIW, using non-blocking FDs and syscall.Select is not normal best > > practice for Go, where the expected model would be to use goroutines > > with the file in blocking mode. > > Right, however I couldn't find any documentation about how to > integrate a C library with that mechanism. Does libvirt-go do > anything like this? What's the intended usage of the FD ? I was thinking it was just for doing plain...

Hello, when i use libguestfs to ceph rbd by golang, but there has panic: panic: runtime error: cgo argument has Go pointer to Go pointer goroutine 1 [running]: guestfs.(*Guestfs).Add_drive.func11(0xc000010028, 0xcda6a0, 0xc0000d6000, 0xc000090280) /opt/gopath/src/guestfs/guestfs.go:1440 +0xc2 guestfs.(*Guestfs).Add_drive(0xc000010028, 0x7ffd4b5d67ff, 0xd, 0xc00008d9d8, 0x0) /opt/gopath/src/guestfs/guestfs.go:1440 +0x1b2 main.OpenImage(0x7ffd4...

...ate event you can listen to that notifies when the connection is closed. See the RegisterCloseCallback() method on the Connect object. Basically register a callback there, and when it fires, unregister your existing domain event callbacks, and close your existing Connect object handle. Then fire a goroutine that loops once every few seconds trying to open a new Connect object, and when that succeeds register new domain event callbacks. Regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berra...

...gt; right - it makes much more sense to have regular C (and assembly) code > for handling coroutines. For instance, I'd otherwise would have to > make an assumption about the threading model the platform has (or > assume there are no threads at all, which prevents me from allowing > goroutine like ("run parallel till you need to write to a channel") > behavior). > > Right now I'm sort-of dogfooding my work by trying to get Go running > on dragonegg. I've discovered some small issues already (for instance > I need to save R10 somewhere when compiling a fu...

Go API functions returned (<val>, *GuestfsError) that made code like this fail to build: n, err := os.Stdin.Read(buf) if err != nil { log.Fatal(err) } n, err = g.Pwrite_device(dev, buf[:n], off) ... As err should be of error (interface) type as of the stdlib call, and should be of *GuestfsError type as of the libguestfs call. The concrete error value that

Hi! Attached my pre-midterm GSoC work for segmented stacks for review (with the required fixes). Thanks! -- Sanjoy Das http://playingwithpointers.com -------------- next part -------------- A non-text attachment was scrubbed... Name: 0001-New-command-line-option-to-enable-segmented-stacks.patch Type: text/x-diff Size: 1699 bytes Desc: not available URL:

...hat notifies when the > connection > is closed. See the RegisterCloseCallback() method on the Connect object. > > Basically register a callback there, and when it fires, unregister your > existing domain event callbacks, and close your existing Connect object > handle. Then fire a goroutine that loops once every few seconds trying > to open a new Connect object, and when that succeeds register new > domain event callbacks. > > Regards, > Daniel > -- > |: https://berrange.com -o- https://www.flickr.com/photos/ > dberrange :| > |: https://libvirt.org...

...er I don't believe this is possible because this function has to call into the plugin (in main module). - Tests are a joke at the moment. We would really need a test which properly exercises threads / parallel client connections, so we can be sure that the nbdkit thread & golang goroutine models do not conflict in some way. (I don't think they do, but need to check). - Current test func pluginPRead() needs to be completed. - Documentation needs fixing. I didn't want to write too many docs until I know finally how plugins would work. Rich. [1] Reading the propos...

Now runs a complete set of tests, notably including the AIO test. File descriptors are passed in and out as plain ints (instead of *os.File) for a couple of reasons: (1) We have to pass the plain int to syscall.Select. (2) Turning an fd into an os.File causes golang to set the blocking flag which is deeply unhelpful. Rich.