Reduce internal Flush() in GL resource glGen/Delete APIs.

gpu/command_buffer/client/share_group.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include <vector>
+
 #include "gpu/command_buffer/client/share_group.h"
 
 #include "base/logging.h"
 #include "base/synchronization/lock.h"
 #include "gpu/command_buffer/client/gles2_implementation.h"
 #include "gpu/command_buffer/client/program_info_manager.h"
 #include "gpu/command_buffer/common/id_allocator.h"
 
 namespace gpu {
 namespace gles2 {
 
+ShareGroupContextData::IdHandlerData::IdHandlerData() { flush_generation_ = 0; }
+
 COMPILE_ASSERT(gpu::kInvalidResource == 0,
                INVALID_RESOURCE_NOT_0_AS_GL_EXPECTS);
 
 // The standard id handler.
 class IdHandler : public IdHandlerInterface {
  public:
   IdHandler() { }
   virtual ~IdHandler() { }
 
   // Overridden from IdHandlerInterface.
@@ skipping 17 matching lines @@
   virtual bool FreeIds(
       GLES2Implementation* gl_impl,
       GLsizei n, const GLuint* ids, DeleteFn delete_fn) OVERRIDE {
     base::AutoLock auto_lock(lock_);
     for (GLsizei ii = 0; ii < n; ++ii) {
       id_allocator_.FreeID(ids[ii]);
     }
     (gl_impl->*delete_fn)(n, ids);
     // We need to ensure that the delete call is evaluated on the service side
     // before any other contexts issue commands using these client ids.
+    // TODO(vmiura): Can remove this by virtualizing internal ids, however
+    // this code only affects PPAPI for now.
     gl_impl->helper()->CommandBufferHelper::Flush();
     return true;
   }
 
   // Overridden from IdHandlerInterface.
-  virtual bool MarkAsUsedForBind(GLuint id) OVERRIDE {
+  virtual bool MarkAsUsedForBind(GLES2Implementation* /* gl_impl */,
+                                 GLuint id) OVERRIDE {
     if (id == 0)
       return true;
     base::AutoLock auto_lock(lock_);
     return id_allocator_.MarkAsUsed(id);
   }
 
- protected:
+  virtual void FreeContext(GLES2Implementation* gl_impl) OVERRIDE {}
+
+ private:
   base::Lock lock_;
   IdAllocator id_allocator_;
 };
 
 // An id handler that requires Gen before Bind.
-class StrictIdHandler : public IdHandler {
+class StrictIdHandler : public IdHandlerInterface {
  public:
-  StrictIdHandler() {}
+  StrictIdHandler(int id_namespace) : id_namespace_(id_namespace) {}

[piman, 2014/02/14 01:56:20]

nit: explicit

[vmiura, 2014/02/14 02:18:12]

Done.

   virtual ~StrictIdHandler() {}
 
   // Overridden from IdHandler.
-  virtual bool MarkAsUsedForBind(GLuint id) OVERRIDE {
+  virtual void MakeIds(GLES2Implementation* gl_impl,
+                       GLuint id_offset,
+                       GLsizei n,
+                       GLuint* ids) OVERRIDE {
+    base::AutoLock auto_lock(lock_);
+
+    // Collect pending FreeIds from other flush_generation.
+    CollectPendingFreeIds(gl_impl);
+
+    // Allocate Ids.
+    if (id_offset == 0) {
+      for (GLsizei ii = 0; ii < n; ++ii) {
+        ids[ii] = id_allocator_.AllocateID();
+      }
+    } else {
+      for (GLsizei ii = 0; ii < n; ++ii) {
+        ids[ii] = id_allocator_.AllocateIDAtOrAbove(id_offset);
+        id_offset = ids[ii] + 1;
+      }
+    }
+  }
+
+  // Overridden from IdHandler.
+  virtual bool FreeIds(GLES2Implementation* gl_impl,
+                       GLsizei n,
+                       const GLuint* ids,
+                       DeleteFn delete_fn) OVERRIDE {
+    base::AutoLock auto_lock(lock_);
+
+    // Collect pending FreeIds from other flush_generation.
+    CollectPendingFreeIds(gl_impl);
+
+    // Save Ids to free in a later flush_generation.
+    ShareGroupContextData::IdHandlerData* ctxt_data =
+        gl_impl->share_group_context_data()->id_handler_data(id_namespace_);
+    for (GLsizei ii = 0; ii < n; ++ii) {
+      ctxt_data->freed_ids_.push_back(ids[ii]);
+    }
+
+    (gl_impl->*delete_fn)(n, ids);
+    return true;
+  }
+
+  // Overridden from IdHandler.
+  virtual bool MarkAsUsedForBind(GLES2Implementation* gl_impl,
+                                 GLuint id) OVERRIDE {
 #ifndef NDEBUG
     {
       base::AutoLock auto_lock(lock_);
+      ShareGroupContextData::IdHandlerData* ctxt_data =
+          gl_impl->share_group_context_data()->id_handler_data(id_namespace_);
+      for (uint32 ii = 0; ii < ctxt_data->freed_ids_.size(); ++ii) {
+        DCHECK(id == 0 || id != ctxt_data->freed_ids_[ii]);
+      }
       DCHECK(id == 0 || id_allocator_.InUse(id));
     }
+#else
+    (void)gl_impl;
 #endif
     return true;
   }
+
+  // Overridden from IdHandlerInterface.
+  virtual void FreeContext(GLES2Implementation* gl_impl) OVERRIDE {
+    CollectPendingFreeIds(gl_impl);
+  }
+
+ private:
+  void CollectPendingFreeIds(GLES2Implementation* gl_impl) {
+    uint32 flush_generation = gl_impl->helper()->flush_generation();
+    ShareGroupContextData::IdHandlerData* ctxt_data =
+        gl_impl->share_group_context_data()->id_handler_data(id_namespace_);
+
+    if (ctxt_data->flush_generation_ != flush_generation) {
+      ctxt_data->flush_generation_ = flush_generation;
+      for (uint32 ii = 0; ii < ctxt_data->freed_ids_.size(); ++ii) {
+        id_allocator_.FreeID(ctxt_data->freed_ids_[ii]);
+      }
+      ctxt_data->freed_ids_.clear();
+    }
+  }
+
+  int id_namespace_;
+
+  base::Lock lock_;
+  IdAllocator id_allocator_;
 };
 
 // An id handler for ids that are never reused.
 class NonReusedIdHandler : public IdHandlerInterface {
  public:
   NonReusedIdHandler() : last_id_(0) {}
   virtual ~NonReusedIdHandler() {}
 
   // Overridden from IdHandlerInterface.
   virtual void MakeIds(
       GLES2Implementation* /* gl_impl */,
       GLuint id_offset, GLsizei n, GLuint* ids) OVERRIDE {
     base::AutoLock auto_lock(lock_);
     for (GLsizei ii = 0; ii < n; ++ii) {
       ids[ii] = ++last_id_ + id_offset;
     }
   }
 
   // Overridden from IdHandlerInterface.
   virtual bool FreeIds(
       GLES2Implementation* gl_impl,
       GLsizei n, const GLuint* ids, DeleteFn delete_fn) OVERRIDE {
     // Ids are never freed.
     (gl_impl->*delete_fn)(n, ids);
     return true;
   }
 
   // Overridden from IdHandlerInterface.
-  virtual bool MarkAsUsedForBind(GLuint /* id */) OVERRIDE {
+  virtual bool MarkAsUsedForBind(GLES2Implementation* /* gl_impl */,
+                                 GLuint /* id */) OVERRIDE {
     // This is only used for Shaders and Programs which have no bind.
     return false;
   }
 
+  virtual void FreeContext(GLES2Implementation* gl_impl) OVERRIDE {}
+
  private:
   base::Lock lock_;
   GLuint last_id_;
 };
 
 ShareGroup::ShareGroup(bool bind_generates_resource)
     : bind_generates_resource_(bind_generates_resource) {
   if (bind_generates_resource) {
     for (int i = 0; i < id_namespaces::kNumIdNamespaces; ++i) {
       if (i == id_namespaces::kProgramsAndShaders) {
         id_handlers_[i].reset(new NonReusedIdHandler());
       } else {
         id_handlers_[i].reset(new IdHandler());
       }
     }
   } else {
     for (int i = 0; i < id_namespaces::kNumIdNamespaces; ++i) {
       if (i == id_namespaces::kProgramsAndShaders) {
         id_handlers_[i].reset(new NonReusedIdHandler());
       } else {
-        id_handlers_[i].reset(new StrictIdHandler());
+        id_handlers_[i].reset(new StrictIdHandler(i));
       }
     }
   }
   program_info_manager_.reset(ProgramInfoManager::Create(false));
 }
 
 void ShareGroup::set_program_info_manager(ProgramInfoManager* manager) {
   program_info_manager_.reset(manager);
 }
 
 ShareGroup::~ShareGroup() {}
 
 }  // namespace gles2
 }  // namespace gpu