I've been experimenting with graphics programming using go+sdl2 for awhile
now. I've always been uncertain how to deal with locking a goroutine to the
main thread. MacOS requires interactions with the OS window to come from
the main thread.
So far, I have something like this (pseudocode):
func main() {
cmds := make(chan func())
go func() {
cmds <- func() {
// this function runs on the main thread
// and accesses the GPU via the global OpenGL state.
gl.Draw()
}
}()
runtime.LockOSThread()
win := createWindow()
for cmd := range cmds {
cmd()
}
}
I'd really love to get that LockOSThread call out of the main function and
hide it away inside a library along with the other internal implementation
details. Is that possible? As far as I can tell, it's not possible to
ensure that a goroutine runs on the main thread without locking it directly
from the main() function.
Thanks.
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