diff options
Diffstat (limited to 'common')
| -rw-r--r-- | common/bthread.c | 44 |
1 files changed, 33 insertions, 11 deletions
diff --git a/common/bthread.c b/common/bthread.c index 48248dfad4..46e6987149 100644 --- a/common/bthread.c +++ b/common/bthread.c @@ -32,10 +32,12 @@ static struct bthread { #endif u8 awake :1; u8 should_stop :1; + u8 should_clean :1; u8 has_stopped :1; } main_thread = { .list = LIST_HEAD_INIT(main_thread.list), .name = "main", + .awake = true, }; struct bthread *current = &main_thread; @@ -66,7 +68,7 @@ bool bthread_is_main(struct bthread *bthread) return bthread == &main_thread; } -void bthread_free(struct bthread *bthread) +static void bthread_free(struct bthread *bthread) { free(bthread->stack); free(bthread->name); @@ -104,6 +106,8 @@ struct bthread *bthread_create(void (*threadfn)(void *), void *data, if (len < 0) goto err; + list_add_tail(&bthread->list, ¤t->list); + /* set up bthread context with the new stack */ initjmp(bthread->jmp_buf, bthread_trampoline, bthread->stack + CONFIG_STACK_SIZE); @@ -121,26 +125,31 @@ void *bthread_data(struct bthread *bthread) void bthread_wake(struct bthread *bthread) { - if (bthread->awake) - return; - list_add_tail(&bthread->list, ¤t->list); bthread->awake = true; } void bthread_suspend(struct bthread *bthread) { - if (!bthread->awake) - return; bthread->awake = false; - list_del(&bthread->list); +} + +void bthread_cancel(struct bthread *bthread) +{ + bthread->should_stop = true; + bthread->should_clean = true; } void __bthread_stop(struct bthread *bthread) { bthread->should_stop = true; + pr_debug("waiting for %s to stop\n", bthread->name); + while (!bthread->has_stopped) bthread_reschedule(); + + list_del(&bthread->list); + bthread_free(bthread); } int bthread_should_stop(void) @@ -163,10 +172,23 @@ void bthread_info(void) void bthread_reschedule(void) { - struct bthread *next = list_next_entry(current, list); - if (current != next) - pr_debug("switch %s -> %s\n", current->name, next->name); - bthread_schedule(next); + struct bthread *next, *tmp; + + if (current == list_next_entry(current, list)) + return; + + list_for_each_entry_safe(next, tmp, ¤t->list, list) { + if (next->awake) { + pr_debug("switch %s -> %s\n", current->name, next->name); + bthread_schedule(next); + return; + } + if (next->has_stopped && next->should_clean) { + pr_debug("deleting %s\n", next->name); + list_del(&next->list); + bthread_free(next); + } + } } void bthread_schedule(struct bthread *to) |