src/gpu/command_buffer/client/buffer_tracker.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "gpu/command_buffer/client/buffer_tracker.h"
   6
   7 #include "gpu/command_buffer/client/atomicops.h"
   8 #include "gpu/command_buffer/client/cmd_buffer_helper.h"
   9 #include "gpu/command_buffer/client/mapped_memory.h"
  10
  11 namespace gpu {
  12 namespace gles2 {
  13
  14 BufferTracker::BufferTracker(MappedMemoryManager* manager)
  15     : mapped_memory_(manager) {
  16 }
  17
  18 BufferTracker::~BufferTracker() {
  19   while (!buffers_.empty()) {
  20     RemoveBuffer(buffers_.begin()->first);
  21   }
  22 }
  23
  24 BufferTracker::Buffer* BufferTracker::CreateBuffer(
  25     GLuint id, GLsizeiptr size) {
  26   GPU_DCHECK_NE(0u, id);
  27   GPU_DCHECK_LE(0, size);
  28   int32 shm_id = -1;
  29   uint32 shm_offset = 0;
  30   void* address = NULL;
  31   if (size)
  32     address = mapped_memory_->Alloc(size, &shm_id, &shm_offset);
  33
  34   Buffer* buffer = new Buffer(id, size, shm_id, shm_offset, address);
  35   std::pair<BufferMap::iterator, bool> result =
  36       buffers_.insert(std::make_pair(id, buffer));
  37   GPU_DCHECK(result.second);
  38   return buffer;
  39 }
  40
  41 BufferTracker::Buffer* BufferTracker::GetBuffer(GLuint client_id) {
  42   BufferMap::iterator it = buffers_.find(client_id);
  43   return it != buffers_.end() ? it->second : NULL;
  44 }
  45
  46 void BufferTracker::RemoveBuffer(GLuint client_id) {
  47   BufferMap::iterator it = buffers_.find(client_id);
  48   if (it != buffers_.end()) {
  49     Buffer* buffer = it->second;
  50     buffers_.erase(it);
  51     if (buffer->address_)
  52       mapped_memory_->Free(buffer->address_);
  53     delete buffer;
  54   }
  55 }
  56
  57 void BufferTracker::FreePendingToken(Buffer* buffer, int32 token) {
  58   if (buffer->address_)
  59     mapped_memory_->FreePendingToken(buffer->address_, token);
  60   buffer->size_ = 0;
  61   buffer->shm_id_ = 0;
  62   buffer->shm_offset_ = 0;
  63   buffer->address_ = NULL;
  64 }
  65
  66
  67 }  // namespace gles2
  68 }  // namespace gpu