Singular Manual: waitTasks

| #### D.2.13.8 waitTasks Procedure from library `tasks.lib` (see tasks_lib). Usage: waitTasks(T, N[, timeout]), T list of tasks, N int, timeout int Return: an ordered list of the indices of those tasks which have been successfully completed. The state of these tasks is set to 'completed'. The procedure waits for N tasks to complete. An optional timeout in ms can be provided. Default is 0 which disables the timeout. Note: A task whose state is neither 'started' nor 'completed' cannot be waited for. The result of any completed task can be accessed via getResult. The returned list may contain more than N entries if the computation of some tasks has already finished and/or if several tasks finish "at the same time". It may contain less than N entries in the case of timeout or errors occurring. Polling is guaranteed, i.e. the index of any task t for which 'pollTask(t);' would return 1 will appear in the returned list. Example:
    LIB "tasks.lib";
    ring R = 0, (x,y), dp;
    ideal I = x9y2+x10, x2y7-y8;
    task t1 = "std", list(I);
    task t2 = "slimgb", list(I);
    startTasks(t1, t2);
    waitTasks(list(t1, t2), 2);   // wait for both tasks
    ==> [1]:
    ==>    1
    ==> [2]:
    ==>    2
    getResult(t1);
    ==> _[1]=x2y7-y8
    ==> _[2]=x9y2+x10
    ==> _[3]=x12y+xy11
    ==> _[4]=x13-xy12
    ==> _[5]=y14+xy12
    ==> _[6]=xy13+y12
    getResult(t2);
    ==> _[1]=x2y7-y8
    ==> _[2]=x9y2+x10
    ==> _[3]=x12y+xy11
    ==> _[4]=x13-xy12
    ==> _[5]=xy13+y12
    ==> _[6]=y14+xy12
    killTask(t1);
    killTask(t2);
See also: getResult; getState; pollTask; printTask; startTasks.

User manual for Singular version 4.3.0p1, 2022, generated by texi2html.