5 files changed, 60 insertions, 3 deletions
diff --git a/al/alError.cpp b/al/alError.cpp
index 159aee52..bff92444 100644
--- a/al/alError.cpp
+++ b/al/alError.cpp
@@ -37,10 +37,10 @@
 #include "AL/al.h"
 #include "AL/alc.h"
 
-#include "alcmain.h"
 #include "alcontext.h"
 #include "alexcpt.h"
 #include "almalloc.h"
+#include "event.h"
 #include "inprogext.h"
 #include "logging.h"
 #include "opthelpers.h"
diff --git a/al/alSource.cpp b/al/alSource.cpp
index 4af5cc47..fdd063ac 100644
--- a/al/alSource.cpp
+++ b/al/alSource.cpp
@@ -59,6 +59,7 @@
 #include "atomic.h"
 #include "backends/base.h"
 #include "bformatdec.h"
+#include "event.h"
 #include "filters/nfc.h"
 #include "filters/splitter.h"
 #include "inprogext.h"
diff --git a/al/alState.cpp b/al/alState.cpp
index ee8d3a1c..001412a8 100644
--- a/al/alState.cpp
+++ b/al/alState.cpp
@@ -33,13 +33,13 @@
 #include "AL/alext.h"
 
 #include "alError.h"
-#include "alcmain.h"
 #include "alcontext.h"
 #include "alexcpt.h"
 #include "almalloc.h"
 #include "alspan.h"
 #include "alu.h"
 #include "atomic.h"
+#include "event.h"
 #include "inprogext.h"
 #include "opthelpers.h"
 
diff --git a/al/event.cpp b/al/event.cpp
index d50cef2e..44d825c6 100644
--- a/al/event.cpp
+++ b/al/event.cpp
@@ -1,6 +1,8 @@
 
 #include "config.h"
 
+#include "event.h"
+
 #include <algorithm>
 #include <atomic>
 #include <cstring>
@@ -16,7 +18,6 @@
 
 #include "alError.h"
 #include "albyte.h"
-#include "alcmain.h"
 #include "alcontext.h"
 #include "alexcpt.h"
 #include "almalloc.h"
diff --git a/al/event.h b/al/event.h
new file mode 100644
index 00000000..e98be560
--- /dev/null
+++ b/al/event.h
@@ -0,0 +1,55 @@
+#ifndef AL_EVENT_H
+#define AL_EVENT_H
+
+#include "AL/al.h"
+#include "AL/alc.h"
+
+struct EffectState;
+
+
+enum {
+    /* End event thread processing. */
+    EventType_KillThread = 0,
+
+    /* User event types. */
+    EventType_SourceStateChange = 1<<0,
+    EventType_BufferCompleted   = 1<<1,
+    EventType_Error             = 1<<2,
+    EventType_Performance       = 1<<3,
+    EventType_Deprecated        = 1<<4,
+    EventType_Disconnected      = 1<<5,
+
+    /* Internal events. */
+    EventType_ReleaseEffectState = 65536,
+};
+
+struct AsyncEvent {
+    unsigned int EnumType{0u};
+    union {
+        char dummy;
+        struct {
+            ALuint id;
+            ALenum state;
+        } srcstate;
+        struct {
+            ALuint id;
+            ALsizei count;
+        } bufcomp;
+        struct {
+            ALenum type;
+            ALuint id;
+            ALuint param;
+            ALchar msg[1008];
+        } user;
+        EffectState *mEffectState;
+    } u{};
+
+    AsyncEvent() noexcept = default;
+    constexpr AsyncEvent(unsigned int type) noexcept : EnumType{type} { }
+};
+
+
+void StartEventThrd(ALCcontext *ctx);
+void StopEventThrd(ALCcontext *ctx);
+
+#endif