/* survives in the child. */
void GC_remove_all_threads_but_me(void)
{
pthread_t self = pthread_self();
int hv;
GC_thread p, next, me;
for (hv = 0; hv < THREAD_TABLE_SZ; ++hv) {
me = 0;
for (p = GC_threads[hv]; 0 != p; p = next) {
next = p -> next;
if (THREAD_EQUAL(p -> id, self)) {
me = p;
p -> next = 0;
} else {
# ifdef THREAD_LOCAL_ALLOC
if (!(p -> flags & FINISHED)) {
GC_destroy_thread_local(&(p->tlfs));
}
# endif /* THREAD_LOCAL_ALLOC */
if (p != &first_thread) GC_INTERNAL_FREE(p);
}
}
GC_threads[hv] = me;
}
}
/* thread being deleted. */
void GC_delete_thread(DWORD id)
{
if (GC_win32_dll_threads) {
GC_thread t = GC_lookup_thread_inner(id);
if (0 == t) {
WARN("Removing nonexistent thread %ld\n", (GC_word)id);
} else {
GC_delete_gc_thread(t);
}
} else {
word hv = ((word)id) % THREAD_TABLE_SZ;
register GC_thread p = GC_threads[hv];
register GC_thread prev = 0;
GC_ASSERT(I_HOLD_LOCK());
while (p -> id != id) {
prev = p;
p = p -> next;
}
CloseHandle(p->handle);
if (prev == 0) {
GC_threads[hv] = p -> next;
} else {
prev -> next = p -> next;
}
GC_INTERNAL_FREE(p);
}
}
static GC_bool ensure_toggleref_capacity(int capacity_inc)
{
GC_ASSERT(capacity_inc >= 0);
if (NULL == GC_toggleref_arr) {
GC_toggleref_array_capacity = 32; /* initial capacity */
GC_toggleref_arr = GC_INTERNAL_MALLOC_IGNORE_OFF_PAGE(
GC_toggleref_array_capacity * sizeof(GCToggleRef),
NORMAL);
if (NULL == GC_toggleref_arr)
return FALSE;
}
if ((unsigned)GC_toggleref_array_size + (unsigned)capacity_inc
>= (unsigned)GC_toggleref_array_capacity) {
GCToggleRef *new_array;
while ((unsigned)GC_toggleref_array_capacity
< (unsigned)GC_toggleref_array_size + (unsigned)capacity_inc) {
GC_toggleref_array_capacity *= 2;
if (GC_toggleref_array_capacity < 0) /* overflow */
return FALSE;
}
new_array = GC_INTERNAL_MALLOC_IGNORE_OFF_PAGE(
GC_toggleref_array_capacity * sizeof(GCToggleRef),
NORMAL);
if (NULL == new_array)
return FALSE;
BCOPY(GC_toggleref_arr, new_array,
GC_toggleref_array_size * sizeof(GCToggleRef));
GC_INTERNAL_FREE(GC_toggleref_arr);
GC_toggleref_arr = new_array;
}
return TRUE;
}
/* (The code intentionally traps if it wasn't.) */
void GC_delete_thread(pthread_t id)
{
int hv = NUMERIC_THREAD_ID(id) % THREAD_TABLE_SZ;
register GC_thread p = GC_threads[hv];
register GC_thread prev = 0;
GC_ASSERT(I_HOLD_LOCK());
while (!THREAD_EQUAL(p -> id, id)) {
prev = p;
p = p -> next;
}
if (prev == 0) {
GC_threads[hv] = p -> next;
} else {
prev -> next = p -> next;
}
# ifdef GC_DARWIN_THREADS
mach_port_deallocate(mach_task_self(), p->stop_info.mach_thread);
# endif
GC_INTERNAL_FREE(p);
}
/* thread being deleted. */
void GC_delete_gc_thread(GC_vthread gc_id)
{
CloseHandle(gc_id->handle);
if (GC_win32_dll_threads) {
/* This is intended to be lock-free. */
/* It is either called synchronously from the thread being deleted, */
/* or by the joining thread. */
/* In this branch asynchronosu changes to *gc_id are possible. */
gc_id -> stack_base = 0;
gc_id -> id = 0;
# ifdef CYGWIN32
gc_id -> pthread_id = 0;
# endif /* CYGWIN32 */
# ifdef GC_WIN32_PTHREADS
gc_id -> pthread_id.p = NULL;
# endif /* GC_WIN32_PTHREADS */
AO_store_release(&(gc_id->in_use), FALSE);
} else {
/* Cast away volatile qualifier, since we have lock. */
GC_thread gc_nvid = (GC_thread)gc_id;
DWORD id = gc_nvid -> id;
word hv = ((word)id) % THREAD_TABLE_SZ;
register GC_thread p = GC_threads[hv];
register GC_thread prev = 0;
GC_ASSERT(I_HOLD_LOCK());
while (p != gc_nvid) {
prev = p;
p = p -> next;
}
if (prev == 0) {
GC_threads[hv] = p -> next;
} else {
prev -> next = p -> next;
}
GC_INTERNAL_FREE(p);
}
}
