android/hal-audio: Set stream fd to blocking

This makes the stream to block on io operation so it does not return
EAGAIN on syscall such as write.

diff --git a/android/hal-audio.c b/android/hal-audio.c
index 2ca6289..b1323b0 100644 (file)
--- a/android/hal-audio.c
+++ b/android/hal-audio.c
@@ -25,6 +25,7 @@
 #include <sys/un.h>
 #include <unistd.h>
 #include <arpa/inet.h>
+#include <fcntl.h>
 
 #include <hardware/audio.h>
 #include <hardware/hardware.h>
@@ -1108,6 +1109,24 @@ static int in_remove_audio_effect(const struct audio_stream *stream,
        return -ENOSYS;
 }
 
+static int set_blocking(int fd)
+{
+       int flags;
+
+       flags = fcntl(fd, F_GETFL, 0);
+       if (flags < 0) {
+               error("fcntl(F_GETFL): %s (%d)", strerror(errno), errno);
+               return -errno;
+       }
+
+       if (fcntl(fd, F_SETFL, flags & ~O_NONBLOCK) < 0) {
+               error("fcntl(F_SETFL): %s (%d)", strerror(errno), errno);
+               return -errno;
+       }
+
+       return 0;
+}
+
 static int audio_open_output_stream(struct audio_hw_device *dev,
                                        audio_io_handle_t handle,
                                        audio_devices_t devices,
@@ -1156,8 +1175,10 @@ static int audio_open_output_stream(struct audio_hw_device *dev,
        if (!preset || fd < 0)
                goto fail;
 
-       out->ep->fd = fd;
+       if (set_blocking(fd) < 0)
+               goto fail;
 
+       out->ep->fd = fd;
        codec = out->ep->codec;
 
        codec->init(preset, mtu, &out->ep->codec_data);