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Atomic reference counting for tasks.

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This commit is contained in:
Eric Holk
2011-07-27 14:51:25 -07:00
parent a5fe66e706
commit 279844ce9f
8 changed files with 43 additions and 77 deletions
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25
src/rt/rust_scheduler.cpp
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@@ -89,14 +89,14 @@ rust_scheduler::reap_dead_tasks(int id) {
rust_task *task = dead_tasks[i];
task->lock.lock();
// Make sure this task isn't still running somewhere else...
if (task->ref_count == 0 && task->can_schedule(id)) {
if (task->can_schedule(id)) {
I(this, task->tasks_waiting_to_join.is_empty());
dead_tasks.remove(task);
DLOG(this, task,
"deleting unreferenced dead task %s @0x%" PRIxPTR,
task->name, task);
task->lock.unlock();
delete task;
task->deref();
sync::decrement(kernel->live_tasks);
kernel->wakeup_schedulers();
continue;
@@ -174,9 +174,8 @@ rust_scheduler::log_state() {
if (!dead_tasks.is_empty()) {
log(NULL, log_note, "dead tasks:");
for (size_t i = 0; i < dead_tasks.length(); i++) {
log(NULL, log_note, "\t task: %s 0x%" PRIxPTR ", ref_count: %d",
dead_tasks[i]->name, dead_tasks[i],
dead_tasks[i]->ref_count);
log(NULL, log_note, "\t task: %s 0x%" PRIxPTR,
dead_tasks[i]->name, dead_tasks[i]);
}
}
}
@@ -225,15 +224,13 @@ rust_scheduler::start_main_loop() {
I(this, scheduled_task->running());
DLOG(this, task,
"activating task %s 0x%" PRIxPTR
", sp=0x%" PRIxPTR
", ref_count=%d"
", state: %s",
scheduled_task->name,
(uintptr_t)scheduled_task,
scheduled_task->rust_sp,
scheduled_task->ref_count,
scheduled_task->state->name);
"activating task %s 0x%" PRIxPTR
", sp=0x%" PRIxPTR
", state: %s",
scheduled_task->name,
(uintptr_t)scheduled_task,
scheduled_task->rust_sp,
scheduled_task->state->name);
interrupt_flag = 0;