Memory: Remove the need for per-thread tear down.

Make key objects using the memory pool own their own pool and delete it,
such that there is not generic per-thread pool to manage.

OGLCompilersDLL/InitializeDll.cpp

@@ -38,8 +38,8 @@
 
 #include "InitializeDll.h"
 #include "../glslang/Include/InitializeGlobals.h"
-
 #include "../glslang/Public/ShaderLang.h"
+#include "../glslang/Include/PoolAlloc.h"
 
 namespace glslang {
 
@@ -105,57 +105,14 @@ bool InitThread()
     if (OS_GetTLSValue(ThreadInitializeIndex) != 0)
         return true;
 
-    InitializeMemoryPools();
-
     if (! OS_SetTLSValue(ThreadInitializeIndex, (void *)1)) {
         assert(0 && "InitThread(): Unable to set init flag.");
         return false;
     }
 
-    return true;
-}
-
-// Thread-scoped tear down. Needs to be done by all but the last
-// thread, which calls DetachProcess() instead.
-// NB. TODO: Not currently being executed by each thread.
-bool DetachThread()
-{
-    bool success = true;
-
-    if (ThreadInitializeIndex == OS_INVALID_TLS_INDEX)
-        return true;
-
-    //
-    // Function is re-entrant and this thread may not have been initialized.
-    //
-    if (OS_GetTLSValue(ThreadInitializeIndex) != 0) {
-        if (!OS_SetTLSValue(ThreadInitializeIndex, (void *)0)) {
-            assert(0 && "DetachThread(): Unable to clear init flag.");
-            success = false;
-        }
+    glslang::SetThreadPoolAllocator(nullptr);
 
-        FreeMemoryPools();
-    }
-
-    return success;
-}
-
-// Process-scoped tear down. Needs to be done by final thread in process.
-bool DetachProcess()
-{
-    bool success = true;
-
-    if (ThreadInitializeIndex == OS_INVALID_TLS_INDEX)
-        return true;
-
-    success = DetachThread();
-
-    FreePoolIndex();
-
-    OS_FreeTLSIndex(ThreadInitializeIndex);
-    ThreadInitializeIndex = OS_INVALID_TLS_INDEX;
-
-    return success;
+    return true;
 }
 
 } // end namespace glslang

OGLCompilersDLL/InitializeDll.h

@@ -40,8 +40,6 @@ namespace glslang {
 
 bool InitProcess();
 bool InitThread();
-bool DetachThread(); // TODO: use this or remove it; ideally make it unneeded
-bool DetachProcess();
 
 } // end namespace glslang
 

glslang/Include/InitializeGlobals.h

@@ -37,11 +37,7 @@
 
 namespace glslang {
 
-void InitializeMemoryPools();
-void FreeMemoryPools();
-
 bool InitializePoolIndex();
-void FreePoolIndex();
 
 } // end namespace glslang
 

glslang/Include/ShHandle.h

@@ -56,11 +56,14 @@ class TUniformMap;
 //
 class TShHandleBase {
 public:
-    TShHandleBase() { }
-    virtual ~TShHandleBase() { }
+    TShHandleBase() { pool = new glslang::TPoolAllocator; }
+    virtual ~TShHandleBase() { delete pool; }
     virtual TCompiler* getAsCompiler() { return 0; }
     virtual TLinker* getAsLinker() { return 0; }
     virtual TUniformMap* getAsUniformMap() { return 0; }
+    virtual glslang::TPoolAllocator* getPool() const { return pool; }
+private:
+    glslang::TPoolAllocator* pool;
 };
 
 //

glslang/MachineIndependent/PoolAlloc.cpp

@@ -43,35 +43,16 @@ namespace glslang {
 // Process-wide TLS index
 OS_TLSIndex PoolIndex;
 
-// Per-thread structure holding pool pointers.
-struct TThreadMemoryPools
-{
-    TPoolAllocator* threadPoolAllocator; // the current pool
-    TPoolAllocator* initialMemoryPool;   // the original pool owned by this thread (this file), to be freed here as well
-};
-
-// Return the thread-specific pool pointers.
-TThreadMemoryPools* GetThreadMemoryPools()
-{
-    return static_cast<TThreadMemoryPools*>(OS_GetTLSValue(PoolIndex));
-}
-
-// Set the thread-specific pool pointers.
-void SetThreadMemoryPools(TThreadMemoryPools* pools)
-{
-    OS_SetTLSValue(PoolIndex, pools);
-}
-
 // Return the thread-specific current pool.
 TPoolAllocator& GetThreadPoolAllocator()
 {
-    return *GetThreadMemoryPools()->threadPoolAllocator;
+    return *static_cast<TPoolAllocator*>(OS_GetTLSValue(PoolIndex));
 }
 
 // Set the thread-specific current pool.
 void SetThreadPoolAllocator(TPoolAllocator* poolAllocator)
 {
-    GetThreadMemoryPools()->threadPoolAllocator = poolAllocator;
+    OS_SetTLSValue(PoolIndex, poolAllocator);
 }
 
 // Process-wide set up of the TLS pool storage.
@@ -81,39 +62,9 @@ bool InitializePoolIndex()
     if ((PoolIndex = OS_AllocTLSIndex()) == OS_INVALID_TLS_INDEX)
         return false;
 
-    SetThreadMemoryPools(nullptr);
-
     return true;
 }
 
-// Process-wide tear down of the TLS pool storage.
-void FreePoolIndex()
-{
-    // Release the TLS index.
-    OS_FreeTLSIndex(PoolIndex);
-}
-
-// Per-thread set up of the memory pools.
-void InitializeMemoryPools()
-{
-    if (GetThreadMemoryPools() == nullptr) {
-        SetThreadMemoryPools(new TThreadMemoryPools());
-        GetThreadMemoryPools()->initialMemoryPool = new TPoolAllocator();
-        SetThreadPoolAllocator(GetThreadMemoryPools()->initialMemoryPool);
-    }
-}
-
-// Per-thread tear down of the memory pools.
-void FreeMemoryPools()
-{
-    if (GetThreadMemoryPools() != nullptr) {
-        if (GetThreadMemoryPools()->initialMemoryPool != nullptr)
-            delete GetThreadMemoryPools()->initialMemoryPool;
-        delete GetThreadMemoryPools();
-        SetThreadMemoryPools(nullptr);
-    }
-}
-
 //
 // Implement the functionality of the TPoolAllocator class, which
 // is documented in PoolAlloc.h.

glslang/MachineIndependent/ShaderLang.cpp

@@ -722,9 +722,6 @@ bool ProcessDeferred(
     const std::string sourceEntryPointName = "",
     const TEnvironment* environment = nullptr)  // optional way of fully setting all versions, overriding the above
 {
-    if (! InitThread())
-        return false;
-
     // This must be undone (.pop()) by the caller, after it finishes consuming the created tree.
     GetThreadPoolAllocator().push();
 
@@ -1299,7 +1296,7 @@ int __fastcall ShFinalize()
     glslang::HlslScanContext::deleteKeywordMap();
 #endif
 
-    return DetachProcess() ? 1 : 0;
+    return 1;
 }
 
 //
@@ -1332,6 +1329,8 @@ int ShCompile(
     if (compiler == 0)
         return 0;
 
+    SetThreadPoolAllocator(compiler->getPool());
+
     compiler->infoSink.info.erase();
     compiler->infoSink.debug.erase();
 
@@ -1389,6 +1388,8 @@ int ShLinkExt(
     TShHandleBase* base = reinterpret_cast<TShHandleBase*>(linkHandle);
     TLinker* linker = static_cast<TLinker*>(base->getAsLinker());
 
+    SetThreadPoolAllocator(linker->getPool());
+
     if (linker == 0)
         return 0;
 
@@ -1423,9 +1424,6 @@ void ShSetEncryptionMethod(ShHandle handle)
 //
 const char* ShGetInfoLog(const ShHandle handle)
 {
-    if (!InitThread())
-        return 0;
-
     if (handle == 0)
         return 0;
 
@@ -1449,9 +1447,6 @@ const char* ShGetInfoLog(const ShHandle handle)
 //
 const void* ShGetExecutable(const ShHandle handle)
 {
-    if (!InitThread())
-        return 0;
-
     if (handle == 0)
         return 0;
 
@@ -1474,9 +1469,6 @@ const void* ShGetExecutable(const ShHandle handle)
 //
 int ShSetVirtualAttributeBindings(const ShHandle handle, const ShBindingTable* table)
 {
-    if (!InitThread())
-        return 0;
-
     if (handle == 0)
         return 0;
 
@@ -1496,9 +1488,6 @@ int ShSetVirtualAttributeBindings(const ShHandle handle, const ShBindingTable* t
 //
 int ShSetFixedAttributeBindings(const ShHandle handle, const ShBindingTable* table)
 {
-    if (!InitThread())
-        return 0;
-
     if (handle == 0)
         return 0;
 
@@ -1517,9 +1506,6 @@ int ShSetFixedAttributeBindings(const ShHandle handle, const ShBindingTable* tab
 //
 int ShExcludeAttributes(const ShHandle handle, int *attributes, int count)
 {
-    if (!InitThread())
-        return 0;
-
     if (handle == 0)
         return 0;
 
@@ -1541,9 +1527,6 @@ int ShExcludeAttributes(const ShHandle handle, int *attributes, int count)
 //
 int ShGetUniformLocation(const ShHandle handle, const char* name)
 {
-    if (!InitThread())
-        return 0;
-
     if (handle == 0)
         return -1;
 
@@ -1707,8 +1690,8 @@ bool TShader::parse(const TBuiltInResource* builtInResources, int defaultVersion
 {
     if (! InitThread())
         return false;
-
     SetThreadPoolAllocator(pool);
+
     if (! preamble)
         preamble = "";
 
@@ -1730,8 +1713,8 @@ bool TShader::preprocess(const TBuiltInResource* builtInResources,
 {
     if (! InitThread())
         return false;
-
     SetThreadPoolAllocator(pool);
+
     if (! preamble)
         preamble = "";
 

glslang/OSDependent/Unix/ossource.cpp

@@ -56,7 +56,6 @@ namespace glslang {
 //
 static void DetachThreadLinux(void *)
 {
-    DetachThread();
 }
 
 //