PCM direct plugins - handle EINTR in the resource server

The poll() call in the resource server for PCM direct plugins might be
interrupted with an signal. Handle the case gracefuly and don't exit
the server (which brings another problems - cannot connect to socket -
later).

diff --git a/src/pcm/pcm_direct.c b/src/pcm/pcm_direct.c
index 8ce406bdea9eea33645ec72680baec1e20509d75..8d70e52b3c5c0bb9afaff12252dc78c32bfdebe7 100644 (file)
--- a/src/pcm/pcm_direct.c
+++ b/src/pcm/pcm_direct.c
@@ -288,9 +288,13 @@ static void server_job(snd_pcm_direct_t *dmix)
        server_printf("DIRECT SERVER STARTED\n");
        while (1) {
                ret = poll(pfds, current + 1, 500);
-               server_printf("DIRECT SERVER: poll ret = %i, revents[0] = 0x%x\n", ret, pfds[0].revents);
-               if (ret < 0)    /* some error */
+               server_printf("DIRECT SERVER: poll ret = %i, revents[0] = 0x%x, errno = %i\n", ret, pfds[0].revents, errno);
+               if (ret < 0) {
+                       if (errno == EINTR)
+                               continue;
+                       /* some error */
                        break;
+               }
                if (ret == 0 || (pfds[0].revents & (POLLERR | POLLHUP))) {      /* timeout or error? */
                        struct shmid_ds buf;
                        snd_pcm_direct_semaphore_down(dmix, DIRECT_IPC_SEM_CLIENT);