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WIP - thread cleanup

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This commit is contained in:
Justin Ethier 2015-12-20 22:48:22 -05:00
parent 6463b2bf06
commit a5fefda485
3 changed files with 24 additions and 4 deletions
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19
gc.c
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@ -105,6 +105,17 @@ void gc_add_mutator(gc_thread_data *thd)
pthread_mutex_unlock(&mutators_lock);
}
void gc_remove_mutator(gc_thread_data *thd)
{
pthread_mutex_lock(&mutators_lock);
if (!ck_array_remove(&Cyc_mutators, (void *)thd)) {
fprintf(stderr, "Unable to remove thread data, exiting\n");
exit(1);
}
ck_array_commit(&Cyc_mutators);
pthread_mutex_unlock(&mutators_lock);
}
gc_heap *gc_heap_create(size_t size, size_t max_size, size_t chunk_size)
{
gc_free_list *free, *next;
@ -1084,7 +1095,7 @@ void gc_wait_handshake()
{
ck_array_iterator_t iterator;
gc_thread_data *m;
int statusm, statusc;
int statusm, statusc, thread_status;
struct timespec tim;
tim.tv_sec = 0;
tim.tv_nsec = 1000000; // 1 millisecond
@ -1093,11 +1104,17 @@ void gc_wait_handshake()
while (1) {
statusc = ATOMIC_GET(&gc_status_col);
statusm = ATOMIC_GET(&(m->gc_status));
thread_status = ATOMIC_GET(&(m->thread_state));
if (statusc == statusm) {
// Handshake succeeded, check next mutator
break;
}
if (thread_status == CYC_THREAD_STATE_TERMINATED) {
// Thread is no longer running
break;
}
// At least for now, just give up quantum and come back to
// this quickly to test again. This probably could be more
// efficient.

1
include/cyclone/types.h
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@ -171,6 +171,7 @@ void vpbuffer_free(void **buf);
/* GC prototypes */
void gc_initialize();
void gc_add_mutator(gc_thread_data *thd);
void gc_remove_mutator(gc_thread_data *thd);
gc_heap *gc_heap_create(size_t size, size_t max_size, size_t chunk_size);
int gc_grow_heap(gc_heap *h, size_t size, size_t chunk_size);
char *gc_copy_obj(object hp, char *obj, gc_thread_data *thd);

8
runtime.c
View file

@ -2493,9 +2493,6 @@ TODO: should rename this function to make it more clear what is really going on
*/
void Cyc_start_thread(gc_thread_data *thd)
{
// TODO: should use an atomic set to modify this
thd->thread_state = CYC_THREAD_STATE_RUNNABLE;
/* Tank, load the jump program... */
setjmp(*(thd->jmp_start));
@ -3211,7 +3208,12 @@ void Cyc_exit_thread(gc_thread_data *thd)
// terminating the thread
printf("DEBUG - exiting thread\n");
// TODO: race condition, cannot free thread data if the collector is using it
gc_remove_mutator(thd);
ATOMIC_SET_IF_EQ(&(thd->thread_state), CYC_THREAD_STATE_RUNNABLE, CYC_THREAD_STATE_TERMINATED);
// TODO: could maintain a dedicated list of old thread data to clean up...
// collector could do it at a time that is safe
// gc_thread_data_free(thd);
pthread_exit(NULL); // For now, just a proof of concept
}