I’m using the Goland IDE, it’s got a great visual debugger. I have a few sync.WaitGroup s that I need to determine the state of when execution is paused (see screenshot below), but I can’t glean what this information means from the docs.
Can anyone help me decipher the exact meaning of this? I’m assuming that whenever the state1 is [3]uint32{0, 0, 0} then wgDone is not waiting on anything and wgDone.Wait() would immediately resume execution. Other than that, I’m not certain the exact meaning of these uint32 in their positions.
It’s not really a Goland specific thing. That was just to provide some context.
I need to know how to interpret this array as a WaitGroup counter. Does the supplied array mean that it has a counter of two? A counter of one? It’s not intuitive to me.
// 64-bit value: high 32 bits are counter, low 32 bits are waiter count.
// 64-bit atomic operations require 64-bit alignment, but 32-bit
// compilers do not ensure it. So we allocate 12 bytes and then use
// the aligned 8 bytes in them as state, and the other 4 as storage
// for the sema.
state1 [3]uint32
