NAME
        CreateTask -- Create task with given name, priority, stacksize

   SYNOPSIS
        task = CreateTask(name,pri,initPC,stackSize)

        struct task *createtask(strptr,long,funcentry,ulong);

   FUNCTION
        This function simplifies program creation of sub-tasks by
        dynamically allocating and initializing required structures
        and stack space, and adding the task to Exec's task list
        with the given name and priority. A tc_MemEntry list is provided
        so that all stack and structure memory allocated by CreateTask()
        is automatically deallocated when the task is removed.

        An Exec task may not call dos.library functions or any function
        which might cause the loading of a disk-resident library, device,
        or file (since such functions are indirectly calls to dos.library).
        Only AmigaDOS Processes may call AmigaDOS; see the
        dos.library/createproc() or the dos.library/createnewproc()
        functions for more information.

        If other tasks or processes will need to find this task by name,
        provide a complex and unique name to avoid conflicts.

        If your compiler provides automatic insertion of stack-checking
        code, you may need to disable this feature when compiling sub-task
        code since the stack for the subtask is at a dynamically allocated
        location.  If your compiler requires 68000 registers to contain
        particular values for base relative addressing, you may need to
        save these registers from your main process, and restore them
        in your initial subtask code.

        The function entry initPC is generally provided as follows:

        In C:
        extern void functionName();
        char *tname = "unique name";
        task = CreateTask(tname, 0L, functionName, 4000L);

        In assembler:
                PEA     startLabel

   INPUTS
        name - a null-terminated name string
        pri - an Exec task priority between -128 and 127, normally 0
        funcEntry - the address of the first executable instruction
                    of the subtask code
        stackSize - size in bytes of stack for the subtask. Don't cut it
                    too close - system function stack usage may change.

   RESULT
        task - a pointer to the newly created task, or NULL if there was not
               enough memory.

   BUGS
        Under exec.library V37 or beyond, the addtask() function used
        internally by CreateTask() can fail whereas it couldn't fail in
        previous versions of Exec. Prior to amiga.lib V37.14, this function
        did not check for failure of addtask() and thus might return a
        pointer to a task structure even though the task was not actually
        added to the system.

        Prior to amiga.lib V40.20 low memory conditions could cause
        CreateTask() to malfunction. The implementation checked whether the
        initial allocentry() call would fail, but would use an inappropriate
        test condition.

   SEE ALSO
        deletetask(), exec/findtask()