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|
package executor
import (
"sync"
)
type ExecutionMethod int
const (
Parallel ExecutionMethod = iota
Serial
)
type ExecutionUnit func()
func (ep ExecutionMethod) ToString() string {
switch ep {
case Parallel:
return "Parallel"
case Serial:
return "Serial"
}
return "Unrecognized execution method"
}
func Execute(executionMethod ExecutionMethod, executionUnits []ExecutionUnit) *sync.WaitGroup {
waiter := &sync.WaitGroup{}
// Make sure that we Add to the wait group all the execution units
// before starting to run any -- there is a potential race condition
// otherwise.
(*waiter).Add(len(executionUnits))
for _, executionUnit := range executionUnits {
// Stupid capture in Go! Argh.
executionUnit := executionUnit
invoker := func() {
executionUnit()
(*waiter).Done()
}
switch executionMethod {
case Parallel:
go invoker()
case Serial:
invoker()
default:
panic("Invalid execution method value given.")
}
}
return waiter
}
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