fix: uasync epoll event ordering + test_uasync_socket_race fix

tests/test_uasync_socket_race.c

@@ -60,16 +60,18 @@ static void on_closed_cb(struct tcp_conn* tc, void* arg) {
 
 static void on_accept_cb(int fd, void* arg) {
     (void)arg;
-    struct sockaddr_in addr; socklen_t alen = sizeof(addr);
-    int csock = accept(fd, (struct sockaddr*)&addr, &alen);
-    if (csock < 0) return;
-    if (csock == 0) { int r = open("/dev/null", O_RDONLY); if (r > 0 && r != 0) { dup2(r, 0); close(r); } return; }
-    socket_set_nonblocking(csock);
-    struct tcp_conn* tc = tcp_conn_create(g_ua, csock, 512, 512, 4, 0, 0, on_fin_cb, on_error_cb, NULL);
-    if (!tc) { socket_close_wrapper(csock); return; }
-    tc->on_closed = on_closed_cb;
-    queue_set_callback(tc->read_queue, on_read_cb, tc);
-    g_conn_count++;
+    while (1) {
+        struct sockaddr_in addr; socklen_t alen = sizeof(addr);
+        int csock = accept(fd, (struct sockaddr*)&addr, &alen);
+        if (csock < 0) return;
+        if (csock == 0) { int r = open("/dev/null", O_RDONLY); if (r > 0 && r != 0) { dup2(r, 0); close(r); } continue; }
+        socket_set_nonblocking(csock);
+        struct tcp_conn* tc = tcp_conn_create(g_ua, csock, 512, 512, 4, 0, 0, on_fin_cb, on_error_cb, NULL);
+        if (!tc) { socket_close_wrapper(csock); continue; }
+        tc->on_closed = on_closed_cb;
+        queue_set_callback(tc->read_queue, on_read_cb, tc);
+        g_conn_count++;
+    }
 }
 
 static int child_main(int port, int id, int count) {
@@ -97,7 +99,7 @@ static void monitor(void* arg) {
         if (WIFEXITED(status) && WEXITSTATUS(status) != 0) { g_done = -1; return; }
         g_children[i] = 0;
     }
-    if (alive == 0) { g_ok = 1; g_done = 1; }
+    if (alive == 0 && g_read_count >= CHILDREN * ITER_PER_CHILD) { g_ok = 1; g_done = 1; }
     if (!g_done) g_mon_id = uasync_set_timeout(g_ua, 500, NULL, monitor, "mon");
 }