Add a command to lose the context

gpu/command_buffer/service/context_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 "gpu/command_buffer/service/context_group.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/command_line.h"
@@ skipping 18 matching lines @@
 namespace gles2 {
 
 ContextGroup::ContextGroup(
     MailboxManager* mailbox_manager,
     ImageManager* image_manager,
     MemoryTracker* memory_tracker,
     bool bind_generates_resource)
     : mailbox_manager_(mailbox_manager ? mailbox_manager : new MailboxManager),
       image_manager_(image_manager ? image_manager : new ImageManager),
       memory_tracker_(memory_tracker),
-      num_contexts_(0),
       enforce_gl_minimums_(CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kEnforceGLMinimums)),
       bind_generates_resource_(bind_generates_resource),
       max_vertex_attribs_(0u),
       max_texture_units_(0u),
       max_texture_image_units_(0u),
       max_vertex_texture_image_units_(0u),
       max_fragment_uniform_vectors_(0u),
       max_varying_vectors_(0u),
       max_vertex_uniform_vectors_(0u),
@@ skipping 14 matching lines @@
   id_namespaces_[id_namespaces::kQueries].reset(new IdAllocator);
   id_namespaces_[id_namespaces::kVertexArrays].reset(new IdAllocator);
 }
 
 static void GetIntegerv(GLenum pname, uint32* var) {
   GLint value = 0;
   glGetIntegerv(pname, &value);
   *var = value;
 }
 
-bool ContextGroup::Initialize(const DisallowedFeatures& disallowed_features,
-                              const char* allowed_features) {
-  if (num_contexts_ > 0) {
-    ++num_contexts_;
+bool ContextGroup::Initialize(
+    GLES2Decoder* decoder,
+    const DisallowedFeatures& disallowed_features,
+    const char* allowed_features) {
+  // If we've already initialized the group just add the context.
+  if (HaveContexts()) {
+    decoders_.push_back(base::AsWeakPtr<GLES2Decoder>(decoder));
     return true;
   }
 
   if (!feature_info_->Initialize(disallowed_features, allowed_features)) {
     LOG(ERROR) << "ContextGroup::Initialize failed because FeatureInfo "
                << "initialization failed.";
     return false;
   }
 
   const GLint kMinRenderbufferSize = 512;  // GL says 1 pixel!
@@ skipping 106 matching lines @@
                << "uniforms or varyings supported.";
     return false;
   }
 
   if (!texture_manager_->Initialize()) {
     LOG(ERROR) << "Context::Group::Initialize failed because texture manager "
                << "failed to initialize.";
     return false;
   }
 
-  ++num_contexts_;
+  decoders_.push_back(base::AsWeakPtr<GLES2Decoder>(decoder));
   return true;
 }
 
-void ContextGroup::Destroy(bool have_context) {
-  DCHECK(num_contexts_ > 0);
-  if (--num_contexts_ > 0)
+namespace {
+
+bool IsNull(const base::WeakPtr<gles2::GLES2Decoder>& decoder) {
+  return !decoder;
+}
+
+}  // namespace anonymous
+
+bool ContextGroup::HaveContexts() {
+  decoders_.erase(std::remove_if(decoders_.begin(), decoders_.end(), IsNull),
+                  decoders_.end());
+  return !decoders_.empty();
+}
+
+void ContextGroup::Destroy(GLES2Decoder* decoder, bool have_context) {
+  decoders_.erase(std::remove(decoders_.begin(), decoders_.end(), decoder),
+                  decoders_.end());
+  // If we still have contexts do nothing.
+  if (HaveContexts()) {
     return;
+  }
 
   if (buffer_manager_ != NULL) {
     buffer_manager_->Destroy(have_context);
     buffer_manager_.reset();
   }
 
   if (framebuffer_manager_ != NULL) {
     framebuffer_manager_->Destroy(have_context);
     framebuffer_manager_.reset();
   }
@@ skipping 34 matching lines @@
   uint32 total = 0;
   if (buffer_manager_.get())
     total += buffer_manager_->mem_represented();
   if (renderbuffer_manager_.get())
     total += renderbuffer_manager_->mem_represented();
   if (texture_manager_.get())
     total += texture_manager_->mem_represented();
   return total;
 }
 
+void ContextGroup::LoseContexts(GLenum reset_status) {
+  for (size_t ii = 0; ii < decoders_.size(); ++ii) {
+    if (decoders_[ii]) {
+      decoders_[ii]->LoseContext(reset_status);
+    }
+  }
+}
+
 ContextGroup::~ContextGroup() {
-  CHECK(num_contexts_ == 0);
+  CHECK(!HaveContexts());
 }
 
 bool ContextGroup::CheckGLFeature(GLint min_required, GLint* v) {
   GLint value = *v;
   if (enforce_gl_minimums_) {
     value = std::min(min_required, value);
   }
   *v = value;
   return value >= min_required;
 }
@@ skipping 19 matching lines @@
     GLenum pname, GLint min_required, uint32* v) {
   uint32 value = 0;
   GetIntegerv(pname, &value);
   bool result = CheckGLFeatureU(min_required, &value);
   *v = value;
   return result;
 }
 
 }  // namespace gles2
 }  // namespace gpu