/
taskmap.go
110 lines (90 loc) · 2 KB
/
taskmap.go
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package core
import (
"fmt"
)
type TaskMap struct {
RWMutex
_map map[Task_Unique_Identifier]*Task
}
func NewTaskMap() (t *TaskMap) {
t = &TaskMap{
_map: make(map[Task_Unique_Identifier]*Task),
}
t.RWMutex.Init("TaskMap")
return t
}
//--------task accessor methods-------
func (tm *TaskMap) Len() (length int, err error) {
read_lock, err := tm.RLockNamed("Len")
if err != nil {
return
}
defer tm.RUnlockNamed(read_lock)
length = len(tm._map)
return
}
func (tm *TaskMap) Get(taskid Task_Unique_Identifier, lock bool) (task *Task, ok bool, err error) {
if lock {
read_lock, xerr := tm.RLockNamed("Get")
if xerr != nil {
err = xerr
return
}
defer tm.RUnlockNamed(read_lock)
}
task, ok = tm._map[taskid]
return
}
func (tm *TaskMap) Has(taskid Task_Unique_Identifier, lock bool) (ok bool, err error) {
if lock {
read_lock, xerr := tm.RLockNamed("Get")
if xerr != nil {
err = xerr
return
}
defer tm.RUnlockNamed(read_lock)
}
_, ok = tm._map[taskid]
return
}
func (tm *TaskMap) GetTasks() (tasks []*Task, err error) {
tasks = []*Task{}
read_lock, err := tm.RLockNamed("GetTasks")
if err != nil {
return
}
defer tm.RUnlockNamed(read_lock)
for _, task := range tm._map {
tasks = append(tasks, task)
}
return
}
func (tm *TaskMap) Delete(taskid Task_Unique_Identifier) (task *Task, ok bool) {
tm.LockNamed("Delete")
defer tm.Unlock()
delete(tm._map, taskid) // TODO should get write lock on task first
return
}
func (tm *TaskMap) Add(task *Task) (modified bool, err error) {
tm.LockNamed("Add")
defer tm.Unlock()
id, err := task.GetId("TaskMap/Add")
if err != nil {
return
}
task_in_map, has_task := tm._map[id]
if has_task && (task_in_map != task) {
err = fmt.Errorf("(TaskMap/Add) task %s is already in TaskMap with a different pointer", id)
return
}
task_state, _ := task.GetState()
if task_state == TASK_STAT_INIT {
err = task.SetState(TASK_STAT_PENDING, false)
if err != nil {
return
}
modified = true
}
tm._map[id] = task
return
}