opj_thread_pool: fix potential deadlock at thread pool destruction

diff --git a/src/lib/openjp2/thread.c b/src/lib/openjp2/thread.c
index 59b5d87ee9a9e059349f86c40991a9f96bf3183e..fce563d033dd288856dfc9888e5050dfd9664ec2 100644 (file)
--- a/src/lib/openjp2/thread.c
+++ b/src/lib/openjp2/thread.c
@@ -930,7 +930,9 @@ void opj_thread_pool_destroy(opj_thread_pool_t* tp)
         int i;
         opj_thread_pool_wait_completion(tp, 0);
 
+        opj_mutex_lock(tp->mutex);
         tp->state = OPJWTS_STOP;
+        opj_mutex_unlock(tp->mutex);
 
         for(i=0;i<tp->worker_threads_count;i++)
         {