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-rw-r--r--ports/esp32/mpthreadport.c19
1 files changed, 12 insertions, 7 deletions
diff --git a/ports/esp32/mpthreadport.c b/ports/esp32/mpthreadport.c
index f575d99e6..9d1c4a758 100644
--- a/ports/esp32/mpthreadport.c
+++ b/ports/esp32/mpthreadport.c
@@ -59,14 +59,19 @@ STATIC thread_t *thread = NULL; // root pointer, handled by mp_thread_gc_others
void mp_thread_init(void *stack, uint32_t stack_len) {
mp_thread_set_state(&mp_state_ctx.thread);
// create the first entry in the linked list of all threads
- thread = &thread_entry0;
- thread->id = xTaskGetCurrentTaskHandle();
- thread->ready = 1;
- thread->arg = NULL;
- thread->stack = stack;
- thread->stack_len = stack_len;
- thread->next = NULL;
+ thread_entry0.id = xTaskGetCurrentTaskHandle();
+ thread_entry0.ready = 1;
+ thread_entry0.arg = NULL;
+ thread_entry0.stack = stack;
+ thread_entry0.stack_len = stack_len;
+ thread_entry0.next = NULL;
mp_thread_mutex_init(&thread_mutex);
+
+ // memory barrier to ensure above data is committed
+ __sync_synchronize();
+
+ // vPortCleanUpTCB needs the thread ready after thread_mutex is ready
+ thread = &thread_entry0;
}
void mp_thread_gc_others(void) {