Provide more descriptive messages to disconnection events

14 files changed, 87 insertions, 62 deletions

diff --git a/Alc/ALc.c b/Alc/ALc.c
index dfda8381..3c9598ca 100644
--- a/Alc/ALc.c
+++ b/Alc/ALc.c
@@ -3810,7 +3810,7 @@ ALC_API ALCcontext* ALC_APIENTRY alcCreateContext(ALCdevice *device, const ALCin
         if(err == ALC_INVALID_DEVICE)
         {
             V0(device->Backend,lock)();
-            aluHandleDisconnect(device);
+            aluHandleDisconnect(device, "Device update failure");
             V0(device->Backend,unlock)();
         }
         ALCdevice_DecRef(device);
@@ -4397,7 +4397,7 @@ ALC_API void ALC_APIENTRY alcCaptureStart(ALCdevice *device)
                 device->Flags |= DEVICE_RUNNING;
             else
             {
-                aluHandleDisconnect(device);
+                aluHandleDisconnect(device, "Device start failure");
                 alcSetError(device, ALC_INVALID_DEVICE);
             }
         }
@@ -4621,10 +4621,10 @@ ALC_API void ALC_APIENTRY alcDeviceResumeSOFT(ALCdevice *device)
                     device->Flags |= DEVICE_RUNNING;
                 else
                 {
-                    alcSetError(device, ALC_INVALID_DEVICE);
                     V0(device->Backend,lock)();
-                    aluHandleDisconnect(device);
+                    aluHandleDisconnect(device, "Device start failure");
                     V0(device->Backend,unlock)();
+                    alcSetError(device, ALC_INVALID_DEVICE);
                 }
             }
         }
@@ -4694,7 +4694,7 @@ ALC_API ALCboolean ALC_APIENTRY alcResetDeviceSOFT(ALCdevice *device, const ALCi
         if(err == ALC_INVALID_DEVICE)
         {
             V0(device->Backend,lock)();
-            aluHandleDisconnect(device);
+            aluHandleDisconnect(device, "Device start failure");
             V0(device->Backend,unlock)();
         }
         ALCdevice_DecRef(device);
diff --git a/Alc/ALu.c b/Alc/ALu.c
index 2a89f455..9f4f7a30 100644
--- a/Alc/ALu.c
+++ b/Alc/ALu.c
@@ -1850,30 +1850,47 @@ void aluMixData(ALCdevice *device, ALvoid *OutBuffer, ALsizei NumSamples)
 }
 
 
-void aluHandleDisconnect(ALCdevice *device)
+void aluHandleDisconnect(ALCdevice *device, const char *msg, ...)
 {
     ALCcontext *ctx;
+    AsyncEvent evt;
+    va_list args;
+    int msglen;
 
     device->Connected = ALC_FALSE;
 
+    evt.EnumType = EventType_Disconnected;
+    evt.Type = AL_EVENT_TYPE_DISCONNECTED_SOFT;
+    evt.ObjectId = 0;
+    evt.Param = 0;
+
+    va_start(args, msg);
+    msglen = vsnprintf(evt.Message, sizeof(evt.Message), msg, args);
+    va_end(args);
+
+    if(msglen < 0 || (size_t)msglen >= sizeof(evt.Message))
+    {
+        evt.Message[sizeof(evt.Message)-1] = 0;
+        msglen = (int)strlen(evt.Message);
+    }
+    if(msglen > 0)
+        msg = evt.Message;
+    else
+    {
+        msg = "<internal error constructing message>";
+        msglen = (int)strlen(msg);
+    }
+
     ctx = ATOMIC_LOAD_SEQ(&device->ContextList);
     while(ctx)
     {
         ALsizei i;
 
-        if((ATOMIC_LOAD(&ctx->EnabledEvts, almemory_order_acquire)&EventType_Disconnected))
+        if((ATOMIC_LOAD(&ctx->EnabledEvts, almemory_order_acquire)&EventType_Disconnected) &&
+           ll_ringbuffer_write_space(ctx->AsyncEvents) > 0)
         {
-            AsyncEvent evt;
-            evt.EnumType = EventType_Disconnected;
-            evt.Type = AL_EVENT_TYPE_DISCONNECTED_SOFT;
-            evt.ObjectId = 0;
-            evt.Param = 0;
-            strcpy(evt.Message, "Device disconnected");
-            if(ll_ringbuffer_write_space(ctx->AsyncEvents) > 0)
-            {
-                ll_ringbuffer_write(ctx->AsyncEvents, (const char*)&evt, 1);
-                alsem_post(&ctx->EventSem);
-            }
+            ll_ringbuffer_write(ctx->AsyncEvents, (const char*)&evt, 1);
+            alsem_post(&ctx->EventSem);
         }
 
         for(i = 0;i < ctx->VoiceCount;i++)
diff --git a/Alc/backends/alsa.c b/Alc/backends/alsa.c
index 915d31d3..72e2936f 100644
--- a/Alc/backends/alsa.c
+++ b/Alc/backends/alsa.c
@@ -502,7 +502,7 @@ static int ALCplaybackAlsa_mixerProc(void *ptr)
         {
             ERR("Invalid state detected: %s\n", snd_strerror(state));
             ALCplaybackAlsa_lock(self);
-            aluHandleDisconnect(device);
+            aluHandleDisconnect(device, "Bad state: %s", snd_strerror(state));
             ALCplaybackAlsa_unlock(self);
             break;
         }
@@ -592,7 +592,7 @@ static int ALCplaybackAlsa_mixerNoMMapProc(void *ptr)
         {
             ERR("Invalid state detected: %s\n", snd_strerror(state));
             ALCplaybackAlsa_lock(self);
-            aluHandleDisconnect(device);
+            aluHandleDisconnect(device, "Bad state: %s", snd_strerror(state));
             ALCplaybackAlsa_unlock(self);
             break;
         }
@@ -1155,7 +1155,8 @@ static ALCboolean ALCcaptureAlsa_start(ALCcaptureAlsa *self)
     if(err < 0)
     {
         ERR("start failed: %s\n", snd_strerror(err));
-        aluHandleDisconnect(STATIC_CAST(ALCbackend, self)->mDevice);
+        aluHandleDisconnect(STATIC_CAST(ALCbackend, self)->mDevice, "Capture state failure: %s",
+                            snd_strerror(err));
         return ALC_FALSE;
     }
 
@@ -1249,7 +1250,7 @@ static ALCenum ALCcaptureAlsa_captureSamples(ALCcaptureAlsa *self, ALCvoid *buff
             if(amt < 0)
             {
                 ERR("restore error: %s\n", snd_strerror(amt));
-                aluHandleDisconnect(device);
+                aluHandleDisconnect(device, "Capture recovery failure: %s", snd_strerror(amt));
                 break;
             }
             /* If the amount available is less than what's asked, we lost it
@@ -1290,7 +1291,7 @@ static ALCuint ALCcaptureAlsa_availableSamples(ALCcaptureAlsa *self)
         if(avail < 0)
         {
             ERR("restore error: %s\n", snd_strerror(avail));
-            aluHandleDisconnect(device);
+            aluHandleDisconnect(device, "Capture recovery failure: %s", snd_strerror(avail));
         }
     }
 
@@ -1329,7 +1330,7 @@ static ALCuint ALCcaptureAlsa_availableSamples(ALCcaptureAlsa *self)
             if(amt < 0)
             {
                 ERR("restore error: %s\n", snd_strerror(amt));
-                aluHandleDisconnect(device);
+                aluHandleDisconnect(device, "Capture recovery failure: %s", snd_strerror(amt));
                 break;
             }
             avail = amt;
diff --git a/Alc/backends/dsound.c b/Alc/backends/dsound.c
index 3d130615..bca8b7f0 100644
--- a/Alc/backends/dsound.c
+++ b/Alc/backends/dsound.c
@@ -267,7 +267,7 @@ FORCE_ALIGN static int ALCdsoundPlayback_mixerProc(void *ptr)
     {
         ERR("Failed to get buffer caps: 0x%lx\n", err);
         ALCdevice_Lock(device);
-        aluHandleDisconnect(device);
+        aluHandleDisconnect(device, "Failure retrieving playback buffer info: 0x%lx", err);
         ALCdevice_Unlock(device);
         return 1;
     }
@@ -291,7 +291,7 @@ FORCE_ALIGN static int ALCdsoundPlayback_mixerProc(void *ptr)
                 {
                     ERR("Failed to play buffer: 0x%lx\n", err);
                     ALCdevice_Lock(device);
-                    aluHandleDisconnect(device);
+                    aluHandleDisconnect(device, "Failure starting playback: 0x%lx", err);
                     ALCdevice_Unlock(device);
                     return 1;
                 }
@@ -339,7 +339,7 @@ FORCE_ALIGN static int ALCdsoundPlayback_mixerProc(void *ptr)
         {
             ERR("Buffer lock error: %#lx\n", err);
             ALCdevice_Lock(device);
-            aluHandleDisconnect(device);
+            aluHandleDisconnect(device, "Failed to lock output buffer: 0x%lx", err);
             ALCdevice_Unlock(device);
             return 1;
         }
@@ -894,7 +894,8 @@ static ALCboolean ALCdsoundCapture_start(ALCdsoundCapture *self)
     if(FAILED(hr))
     {
         ERR("start failed: 0x%08lx\n", hr);
-        aluHandleDisconnect(STATIC_CAST(ALCbackend, self)->mDevice);
+        aluHandleDisconnect(STATIC_CAST(ALCbackend, self)->mDevice,
+                            "Failure starting capture: 0x%lx", hr);
         return ALC_FALSE;
     }
 
@@ -909,7 +910,8 @@ static void ALCdsoundCapture_stop(ALCdsoundCapture *self)
     if(FAILED(hr))
     {
         ERR("stop failed: 0x%08lx\n", hr);
-        aluHandleDisconnect(STATIC_CAST(ALCbackend, self)->mDevice);
+        aluHandleDisconnect(STATIC_CAST(ALCbackend, self)->mDevice,
+                            "Failure stopping capture: 0x%lx", hr);
     }
 }
 
@@ -959,7 +961,7 @@ static ALCuint ALCdsoundCapture_availableSamples(ALCdsoundCapture *self)
     if(FAILED(hr))
     {
         ERR("update failed: 0x%08lx\n", hr);
-        aluHandleDisconnect(device);
+        aluHandleDisconnect(device, "Failure retrieving capture data: 0x%lx", hr);
     }
 
 done:
diff --git a/Alc/backends/jack.c b/Alc/backends/jack.c
index 14032d45..2f17bbf6 100644
--- a/Alc/backends/jack.c
+++ b/Alc/backends/jack.c
@@ -241,7 +241,7 @@ static int ALCjackPlayback_bufferSizeNotify(jack_nframes_t numframes, void *arg)
     if(!self->Ring)
     {
         ERR("Failed to reallocate ringbuffer\n");
-        aluHandleDisconnect(device);
+        aluHandleDisconnect(device, "Failed to reallocate %u-sample buffer", bufsize);
     }
     ALCjackPlayback_unlock(self);
     return 0;
diff --git a/Alc/backends/mmdevapi.c b/Alc/backends/mmdevapi.c
index d63d22df..5f1dbba8 100644
--- a/Alc/backends/mmdevapi.c
+++ b/Alc/backends/mmdevapi.c
@@ -632,7 +632,7 @@ FORCE_ALIGN static int ALCmmdevPlayback_mixerProc(void *arg)
     {
         ERR("CoInitialize(NULL) failed: 0x%08lx\n", hr);
         V0(device->Backend,lock)();
-        aluHandleDisconnect(device);
+        aluHandleDisconnect(device, "COM init failed: 0x%08lx", hr);
         V0(device->Backend,unlock)();
         return 1;
     }
@@ -649,7 +649,7 @@ FORCE_ALIGN static int ALCmmdevPlayback_mixerProc(void *arg)
         {
             ERR("Failed to get padding: 0x%08lx\n", hr);
             V0(device->Backend,lock)();
-            aluHandleDisconnect(device);
+            aluHandleDisconnect(device, "Failed to retrieve buffer padding: 0x%08lx", hr);
             V0(device->Backend,unlock)();
             break;
         }
@@ -679,7 +679,7 @@ FORCE_ALIGN static int ALCmmdevPlayback_mixerProc(void *arg)
         {
             ERR("Failed to buffer data: 0x%08lx\n", hr);
             V0(device->Backend,lock)();
-            aluHandleDisconnect(device);
+            aluHandleDisconnect(device, "Failed to send playback samples: 0x%08lx", hr);
             V0(device->Backend,unlock)();
             break;
         }
@@ -1326,7 +1326,7 @@ FORCE_ALIGN int ALCmmdevCapture_recordProc(void *arg)
     {
         ERR("CoInitialize(NULL) failed: 0x%08lx\n", hr);
         V0(device->Backend,lock)();
-        aluHandleDisconnect(device);
+        aluHandleDisconnect(device, "COM init failed: 0x%08lx", hr);
         V0(device->Backend,unlock)();
         return 1;
     }
@@ -1415,7 +1415,7 @@ FORCE_ALIGN int ALCmmdevCapture_recordProc(void *arg)
         if(FAILED(hr))
         {
             V0(device->Backend,lock)();
-            aluHandleDisconnect(device);
+            aluHandleDisconnect(device, "Failed to capture samples: 0x%08lx", hr);
             V0(device->Backend,unlock)();
             break;
         }
diff --git a/Alc/backends/opensl.c b/Alc/backends/opensl.c
index fb56b67c..93d2e521 100644
--- a/Alc/backends/opensl.c
+++ b/Alc/backends/opensl.c
@@ -255,7 +255,7 @@ static int ALCopenslPlayback_mixerProc(void *arg)
     if(SL_RESULT_SUCCESS != result)
     {
         ALCopenslPlayback_lock(self);
-        aluHandleDisconnect(device);
+        aluHandleDisconnect(device, "Failed to get playback buffer: 0x%08x", result);
         ALCopenslPlayback_unlock(self);
         return 1;
     }
@@ -283,7 +283,7 @@ static int ALCopenslPlayback_mixerProc(void *arg)
             }
             if(SL_RESULT_SUCCESS != result)
             {
-                aluHandleDisconnect(device);
+                aluHandleDisconnect(device, "Failed to start platback: 0x%08x", result);
                 break;
             }
 
@@ -919,7 +919,8 @@ static ALCboolean ALCopenslCapture_start(ALCopenslCapture *self)
     if(SL_RESULT_SUCCESS != result)
     {
         ALCopenslCapture_lock(self);
-        aluHandleDisconnect(STATIC_CAST(ALCbackend, self)->mDevice);
+        aluHandleDisconnect(STATIC_CAST(ALCbackend, self)->mDevice,
+                            "Failed to start capture: 0x%08x", result);
         ALCopenslCapture_unlock(self);
         return ALC_FALSE;
     }
@@ -1002,7 +1003,7 @@ static ALCenum ALCopenslCapture_captureSamples(ALCopenslCapture *self, ALCvoid *
     if(SL_RESULT_SUCCESS != result)
     {
         ALCopenslCapture_lock(self);
-        aluHandleDisconnect(device);
+        aluHandleDisconnect(device, "Failed to update capture buffer: 0x%08x", result);
         ALCopenslCapture_unlock(self);
         return ALC_INVALID_DEVICE;
     }
diff --git a/Alc/backends/oss.c b/Alc/backends/oss.c
index b2d9c555..9b0c2d42 100644
--- a/Alc/backends/oss.c
+++ b/Alc/backends/oss.c
@@ -299,7 +299,7 @@ static int ALCplaybackOSS_mixerProc(void *ptr)
             if(errno == EINTR)
                 continue;
             ERR("select failed: %s\n", strerror(errno));
-            aluHandleDisconnect(device);
+            aluHandleDisconnect(device, "Failed waiting for playback buffer: %s", strerror(errno));
             break;
         }
         else if(sret == 0)
@@ -319,7 +319,8 @@ static int ALCplaybackOSS_mixerProc(void *ptr)
                 if(errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR)
                     continue;
                 ERR("write failed: %s\n", strerror(errno));
-                aluHandleDisconnect(device);
+                aluHandleDisconnect(device, "Failed writing playback samples: %s",
+                                    strerror(errno));
                 break;
             }
 
@@ -566,7 +567,7 @@ static int ALCcaptureOSS_recordProc(void *ptr)
             if(errno == EINTR)
                 continue;
             ERR("select failed: %s\n", strerror(errno));
-            aluHandleDisconnect(device);
+            aluHandleDisconnect(device, "Failed to check capture samples: %s", strerror(errno));
             break;
         }
         else if(sret == 0)
@@ -583,7 +584,7 @@ static int ALCcaptureOSS_recordProc(void *ptr)
             {
                 ERR("read failed: %s\n", strerror(errno));
                 ALCcaptureOSS_lock(self);
-                aluHandleDisconnect(device);
+                aluHandleDisconnect(device, "Failed reading capture samples: %s", strerror(errno));
                 ALCcaptureOSS_unlock(self);
                 break;
             }
diff --git a/Alc/backends/pulseaudio.c b/Alc/backends/pulseaudio.c
index bcfbb6c2..28858a72 100644
--- a/Alc/backends/pulseaudio.c
+++ b/Alc/backends/pulseaudio.c
@@ -650,7 +650,7 @@ static void ALCpulsePlayback_contextStateCallback(pa_context *context, void *pda
     if(pa_context_get_state(context) == PA_CONTEXT_FAILED)
     {
         ERR("Received context failure!\n");
-        aluHandleDisconnect(STATIC_CAST(ALCbackend,self)->mDevice);
+        aluHandleDisconnect(STATIC_CAST(ALCbackend,self)->mDevice, "Playback state failure");
     }
     pa_threaded_mainloop_signal(self->loop, 0);
 }
@@ -661,7 +661,7 @@ static void ALCpulsePlayback_streamStateCallback(pa_stream *stream, void *pdata)
     if(pa_stream_get_state(stream) == PA_STREAM_FAILED)
     {
         ERR("Received stream failure!\n");
-        aluHandleDisconnect(STATIC_CAST(ALCbackend,self)->mDevice);
+        aluHandleDisconnect(STATIC_CAST(ALCbackend,self)->mDevice, "Playback stream failure");
     }
     pa_threaded_mainloop_signal(self->loop, 0);
 }
@@ -835,7 +835,7 @@ static int ALCpulsePlayback_mixerProc(void *ptr)
         if(len < 0)
         {
             ERR("Failed to get writable size: %ld", (long)len);
-            aluHandleDisconnect(device);
+            aluHandleDisconnect(device, "Failed to get writable size: %ld", (long)len);
             break;
         }
 
@@ -1388,7 +1388,7 @@ static void ALCpulseCapture_contextStateCallback(pa_context *context, void *pdat
     if(pa_context_get_state(context) == PA_CONTEXT_FAILED)
     {
         ERR("Received context failure!\n");
-        aluHandleDisconnect(STATIC_CAST(ALCbackend,self)->mDevice);
+        aluHandleDisconnect(STATIC_CAST(ALCbackend,self)->mDevice, "Capture state failure");
     }
     pa_threaded_mainloop_signal(self->loop, 0);
 }
@@ -1399,7 +1399,7 @@ static void ALCpulseCapture_streamStateCallback(pa_stream *stream, void *pdata)
     if(pa_stream_get_state(stream) == PA_STREAM_FAILED)
     {
         ERR("Received stream failure!\n");
-        aluHandleDisconnect(STATIC_CAST(ALCbackend,self)->mDevice);
+        aluHandleDisconnect(STATIC_CAST(ALCbackend,self)->mDevice, "Capture stream failure");
     }
     pa_threaded_mainloop_signal(self->loop, 0);
 }
@@ -1662,14 +1662,15 @@ static ALCenum ALCpulseCapture_captureSamples(ALCpulseCapture *self, ALCvoid *bu
             state = pa_stream_get_state(self->stream);
             if(!PA_STREAM_IS_GOOD(state))
             {
-                aluHandleDisconnect(device);
+                aluHandleDisconnect(device, "Bad capture state: %u", state);
                 break;
             }
             if(pa_stream_peek(self->stream, &self->cap_store, &self->cap_len) < 0)
             {
                 ERR("pa_stream_peek() failed: %s\n",
                     pa_strerror(pa_context_errno(self->context)));
-                aluHandleDisconnect(device);
+                aluHandleDisconnect(device, "Failed retrieving capture samples: %s",
+                                    pa_strerror(pa_context_errno(self->context)));
                 break;
             }
             self->cap_remain = self->cap_len;
@@ -1710,7 +1711,7 @@ static ALCuint ALCpulseCapture_availableSamples(ALCpulseCapture *self)
         if(got < 0)
         {
             ERR("pa_stream_readable_size() failed: %s\n", pa_strerror(got));
-            aluHandleDisconnect(device);
+            aluHandleDisconnect(device, "Failed getting readable size: %s", pa_strerror(got));
         }
         else if((size_t)got > self->cap_len)
             readable += got - self->cap_len;
diff --git a/Alc/backends/qsa.c b/Alc/backends/qsa.c
index 614d738c..484cadaa 100644
--- a/Alc/backends/qsa.c
+++ b/Alc/backends/qsa.c
@@ -220,7 +220,7 @@ FORCE_ALIGN static int qsa_proc_playback(void *ptr)
         if(sret == -1)
         {
             ERR("select error: %s\n", strerror(errno));
-            aluHandleDisconnect(device);
+            aluHandleDisconnect(device, "Failed waiting for playback buffer: %s", strerror(errno));
             break;
         }
         if(sret == 0)
@@ -251,7 +251,7 @@ FORCE_ALIGN static int qsa_proc_playback(void *ptr)
                 {
                     if(snd_pcm_plugin_prepare(data->pcmHandle, SND_PCM_CHANNEL_PLAYBACK) < 0)
                     {
-                        aluHandleDisconnect(device);
+                        aluHandleDisconnect(device, "Playback recovery failed");
                         break;
                     }
                 }
@@ -847,7 +847,7 @@ static ALCuint qsa_available_samples(CaptureWrapper *self)
         if ((rstatus=snd_pcm_plugin_prepare(data->pcmHandle, SND_PCM_CHANNEL_CAPTURE))<0)
         {
             ERR("capture prepare failed: %s\n", snd_strerror(rstatus));
-            aluHandleDisconnect(device);
+            aluHandleDisconnect(device, "Failed capture recovery: %s", snd_strerror(rstatus));
             return 0;
         }
 
@@ -890,7 +890,7 @@ static ALCenum qsa_capture_samples(CaptureWrapper *self, ALCvoid *buffer, ALCuin
         switch (selectret)
         {
             case -1:
-                 aluHandleDisconnect(device);
+                 aluHandleDisconnect(device, "Failed to check capture samples");
                  return ALC_INVALID_DEVICE;
             case 0:
                  break;
@@ -921,7 +921,8 @@ static ALCenum qsa_capture_samples(CaptureWrapper *self, ALCvoid *buffer, ALCuin
                 if ((rstatus=snd_pcm_plugin_prepare(data->pcmHandle, SND_PCM_CHANNEL_CAPTURE))<0)
                 {
                     ERR("capture prepare failed: %s\n", snd_strerror(rstatus));
-                    aluHandleDisconnect(device);
+                    aluHandleDisconnect(device, "Failed capture recovery: %s",
+                                        snd_strerror(rstatus));
                     return ALC_INVALID_DEVICE;
                 }
                 snd_pcm_capture_go(data->pcmHandle);
diff --git a/Alc/backends/sndio.c b/Alc/backends/sndio.c
index f7b9af69..06a434d9 100644
--- a/Alc/backends/sndio.c
+++ b/Alc/backends/sndio.c
@@ -117,7 +117,7 @@ static int ALCsndioBackend_mixerProc(void *ptr)
             {
                 ERR("sio_write failed\n");
                 ALCdevice_Lock(device);
-                aluHandleDisconnect(device);
+                aluHandleDisconnect(device, "Failed to write playback samples");
                 ALCdevice_Unlock(device);
                 break;
             }
diff --git a/Alc/backends/solaris.c b/Alc/backends/solaris.c
index 49bfad3c..fdc62562 100644
--- a/Alc/backends/solaris.c
+++ b/Alc/backends/solaris.c
@@ -135,7 +135,7 @@ static int ALCsolarisBackend_mixerProc(void *ptr)
             if(errno == EINTR)
                 continue;
             ERR("select failed: %s\n", strerror(errno));
-            aluHandleDisconnect(device);
+            aluHandleDisconnect(device, "Failed to wait for playback buffer: %s", strerror(errno));
             break;
         }
         else if(sret == 0)
@@ -155,7 +155,8 @@ static int ALCsolarisBackend_mixerProc(void *ptr)
                 if(errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR)
                     continue;
                 ERR("write failed: %s\n", strerror(errno));
-                aluHandleDisconnect(device);
+                aluHandleDisconnect(device, "Failed to write playback samples: %s",
+                                    strerror(errno));
                 break;
             }
 
diff --git a/Alc/backends/wave.c b/Alc/backends/wave.c
index ecb066f8..13ffaeec 100644
--- a/Alc/backends/wave.c
+++ b/Alc/backends/wave.c
@@ -204,7 +204,7 @@ static int ALCwaveBackend_mixerProc(void *ptr)
             {
                 ERR("Error writing to file\n");
                 ALCdevice_Lock(device);
-                aluHandleDisconnect(device);
+                aluHandleDisconnect(device, "Failed to write playback samples");
                 ALCdevice_Unlock(device);
                 break;
             }
diff --git a/OpenAL32/Include/alu.h b/OpenAL32/Include/alu.h
index 0d39729d..920b7b44 100644
--- a/OpenAL32/Include/alu.h
+++ b/OpenAL32/Include/alu.h
@@ -520,7 +520,7 @@ ALboolean MixSource(struct ALvoice *voice, ALuint SourceID, ALCcontext *Context,
 
 void aluMixData(ALCdevice *device, ALvoid *OutBuffer, ALsizei NumSamples);
 /* Caller must lock the device, and the mixer must not be running. */
-void aluHandleDisconnect(ALCdevice *device);
+void aluHandleDisconnect(ALCdevice *device, const char *msg, ...) DECL_FORMAT(printf, 2, 3);
 
 void UpdateContextProps(ALCcontext *context);