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Clarify nOS-V running task logic

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This commit is contained in:
Rodrigo Arias 2022-06-17 17:06:08 +02:00
parent eb060cffb9
commit 553cb45700
1 changed files with 14 additions and 17 deletions
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31
emu_nosv.c
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@ -331,24 +331,21 @@ pre_task_switch(struct ovni_emu *emu, struct nosv_task *prev_task,
chan_set(&th->chan[CHAN_NOSV_TYPE], next_task->type->gid);
}
static int
is_running_task(struct ovni_emu *emu, struct nosv_task **ptask)
static struct nosv_task *
get_running_task(struct ovni_emu *emu)
{
struct nosv_task *task = emu->cur_thread->task_stack;
if(task && task->state == TASK_ST_RUNNING)
{
*ptask = task;
return 1;
}
return task;
return 0;
return NULL;
}
static void
pre_task(struct ovni_emu *emu)
{
struct nosv_task *prev_task = NULL;
int was_running_task = is_running_task(emu, &prev_task);
struct nosv_task *prev_running = get_running_task(emu);
int was_running_task = (prev_running != NULL);
/* Update the emulator state, but don't modify the channels yet */
switch(emu->cur_ev->header.value)
@ -362,8 +359,8 @@ pre_task(struct ovni_emu *emu)
abort();
}
struct nosv_task *next_task = NULL;
int runs_task_now = is_running_task(emu, &next_task);
struct nosv_task *next_running = get_running_task(emu);
int runs_task_now = (next_running != NULL);
/* Now that we know if the emulator was running a task before
* or if it's running one now, update the channels accordingly. */
@ -371,21 +368,21 @@ pre_task(struct ovni_emu *emu)
{
case 'x': /* Execute: either a nested task or a new one */
if(was_running_task)
pre_task_switch(emu, prev_task, next_task, 1);
pre_task_switch(emu, prev_running, next_running, 1);
else
pre_task_running(emu, next_task);
pre_task_running(emu, next_running);
break;
case 'e': /* End: either a nested task or the last one */
if(runs_task_now)
pre_task_switch(emu, prev_task, next_task, 0);
pre_task_switch(emu, prev_running, next_running, 0);
else
pre_task_not_running(emu, prev_task);
pre_task_not_running(emu, prev_running);
break;
case 'p': /* Pause */
pre_task_not_running(emu, prev_task);
pre_task_not_running(emu, prev_running);
break;
case 'r': /* Resume */
pre_task_running(emu, next_task);
pre_task_running(emu, next_running);
break;
default:
break;