序
本文主要研究一下gost的GoUnterminated
GoUnterminated
gost/runtime/goroutine.go
// GoUnterminated is used for which goroutine wanna long live as its process.
// @period: sleep time duration after panic to defeat @handle panic so frequently. if it is not positive,
// the @handle will be invoked asap after panic.
func GoUnterminated(handle func(), wg *sync.WaitGroup, ignoreRecover bool, period time.Duration) {
GoSafely(wg,
ignoreRecover,
handle,
func(r interface{}) {
if period > 0 {
time.Sleep(period)
}
GoUnterminated(handle, wg, ignoreRecover, period)
},
)
}
GoUnterminated方法提供handle、WaitGroup、ignoreRecover、period参数,其内部使用的是GoSafely,只是catchFunc是内置的;catchFunc对于period大于0的会sleep一下,之后还是执行GoUnterminated,这样子在handle出错(panic
)的时候会一直递归循环下去
实例
gost/runtime/goroutine_test.go
func TestGoUnterminated(t *testing.T) {
times := uint64(1)
var wg sync.WaitGroup
GoUnterminated(
func() {
if atomic.AddUint64(×, 1) == 2 {
panic("hello")
}
},
&wg,
false,
1e8,
)
wg.Wait()
assert.True(t, atomic.LoadUint64(×) == 3)
GoUnterminated(func() {
atomic.AddUint64(×, 1)
},
nil,
false,
1e8,
)
time.Sleep(1e9)
assert.True(t, atomic.LoadUint64(×) == 4)
}
这里模拟了一下handler在times为1的时候产生panic,以及handler不产生panic就立刻结束的场景
小结
gost提供了GoSafely方法,该方法提供handle、WaitGroup、ignoreRecover、period参数,其内部使用的是GoSafely,只是catchFunc是内置的;catchFunc对于period大于0的会sleep一下,之后还是执行GoUnterminated,这样子在handle出错(panic
)的时候会一直递归循环下去。
doc
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