diff options
Diffstat (limited to 'src/runtime/runtime2.go')
| -rw-r--r-- | src/runtime/runtime2.go | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/runtime/runtime2.go b/src/runtime/runtime2.go index 89774791eb..a54dc552c1 100644 --- a/src/runtime/runtime2.go +++ b/src/runtime/runtime2.go @@ -210,6 +210,16 @@ type gobuf struct { bp uintptr // for GOEXPERIMENT=framepointer } +// sudog represents a g in a wait list, such as for sending/receiving +// on a channel. +// +// sudog is necessary because the g ↔ synchronization object relation +// is many-to-many. A g can be on many wait lists, so there may be +// many sudogs for one g; and many gs may be waiting on the same +// synchronization object, so there may be many sudogs for one object. +// +// sudogs are allocated from a special pool. Use acquireSudog and +// releaseSudog to allocate and free them. type sudog struct { // The following fields are protected by the hchan.lock of the // channel this sudog is blocking on. shrinkstack depends on |