Atuomatically clean up sources with its sublist's destruction

Alc/alc.cpp

@@ -2598,11 +2598,11 @@ ALCcontext_struct::~ALCcontext_struct()
     al_free(ActiveAuxSlots.exchange(nullptr, std::memory_order_relaxed));
     DefaultSlot = nullptr;
 
-    ReleaseALSources(this);
-    std::for_each(SourceList.begin(), SourceList.end(),
-        [](const SourceSubList &entry) noexcept -> void
-        { al_free(entry.Sources); }
-    );
+    count = 0;
+    for(auto &sublist : SourceList)
+        count += POPCNT64(~sublist.FreeMask);
+    if(count > 0)
+        WARN(SZFMT " Source%s not deleted\n", count, (count==1)?"":"s");
     SourceList.clear();
     NumSources = 0;
     almtx_destroy(&SourceLock);

Alc/alcontext.h

@@ -44,6 +44,16 @@ enum class DistanceModel {
 struct SourceSubList {
     uint64_t FreeMask{~uint64_t{}};
     ALsource *Sources{nullptr}; /* 64 */
+
+    SourceSubList() noexcept = default;
+    SourceSubList(const SourceSubList&) = delete;
+    SourceSubList(SourceSubList&& rhs) noexcept : FreeMask{rhs.FreeMask}, Sources{rhs.Sources}
+    { rhs.FreeMask = ~uint64_t{}; rhs.Sources = nullptr; }
+    ~SourceSubList();
+
+    SourceSubList& operator=(const SourceSubList&) = delete;
+    SourceSubList& operator=(SourceSubList&& rhs) noexcept
+    { std::swap(FreeMask, rhs.FreeMask); std::swap(Sources, rhs.Sources); return *this; }
 };
 
 /* Effect slots are rather large, and apps aren't likely to have more than one

OpenAL32/Include/alSource.h

@@ -119,8 +119,6 @@ typedef struct ALsource {
 
 void UpdateAllSourceProps(ALCcontext *context);
 
-ALvoid ReleaseALSources(ALCcontext *Context);
-
 #ifdef __cplusplus
 }
 #endif

OpenAL32/alSource.cpp

@@ -3399,28 +3399,19 @@ void UpdateAllSourceProps(ALCcontext *context)
     );
 }
 
-/* ReleaseALSources
- *
- * Destroys all sources in the source map.
- */
-ALvoid ReleaseALSources(ALCcontext *context)
+SourceSubList::~SourceSubList()
 {
-    size_t leftover = 0;
-    for(auto &sublist : context->SourceList)
+    ALuint64 usemask = ~FreeMask;
+    while(usemask)
     {
-        ALuint64 usemask = ~sublist.FreeMask;
-        while(usemask)
-        {
-            ALsizei idx{CTZ64(usemask)};
-            ALsource *source{sublist.Sources + idx};
+        ALsizei idx{CTZ64(usemask)};
+        ALsource *source{Sources + idx};
 
-            source->~ALsource();
-            ++leftover;
+        source->~ALsource();
 
-            usemask &= ~(U64(1) << idx);
-        }
-        sublist.FreeMask = ~usemask;
+        usemask &= ~(U64(1) << idx);
     }
-    if(leftover > 0)
-        WARN("(%p) Deleted " SZFMT " Source%s\n", context, leftover, (leftover==1)?"":"s");
+    FreeMask = ~usemask;
+    al_free(Sources);
+    Sources = nullptr;
 }