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 <utility>
   8 #include "gpu/command_buffer/client/mapped_memory.h"
   9
  10 namespace gpu {
  11 namespace gles2 {
  12
  13 BufferTracker::BufferTracker(MappedMemoryManager* manager)
  14     : mapped_memory_(manager) {
  15 }
  16
  17 BufferTracker::~BufferTracker() {
  18   while (!buffers_.empty()) {
  19     RemoveBuffer(buffers_.begin()->first);
  20   }
  21 }
  22
  23 BufferTracker::Buffer* BufferTracker::CreateBuffer(
  24     GLuint id, GLsizeiptr size) {
  25   DCHECK_NE(0u, id);
  26   DCHECK_LE(0, size);
  27   int32 shm_id = -1;
  28   uint32 shm_offset = 0;
  29   void* address = NULL;
  30   if (size)
  31     address = mapped_memory_->Alloc(size, &shm_id, &shm_offset);
  32
  33   Buffer* buffer = new Buffer(id, size, shm_id, shm_offset, address);
  34   std::pair<BufferMap::iterator, bool> result =
  35       buffers_.insert(std::make_pair(id, buffer));
  36   DCHECK(result.second);
  37   return buffer;
  38 }
  39
  40 BufferTracker::Buffer* BufferTracker::GetBuffer(GLuint client_id) {
  41   BufferMap::iterator it = buffers_.find(client_id);
  42   return it != buffers_.end() ? it->second : NULL;
  43 }
  44
  45 void BufferTracker::RemoveBuffer(GLuint client_id) {
  46   BufferMap::iterator it = buffers_.find(client_id);
  47   if (it != buffers_.end()) {
  48     Buffer* buffer = it->second;
  49     buffers_.erase(it);
  50     if (buffer->address_)
  51       mapped_memory_->Free(buffer->address_);
  52     delete buffer;
  53   }
  54 }
  55
  56 void BufferTracker::FreePendingToken(Buffer* buffer, int32 token) {
  57   if (buffer->address_)
  58     mapped_memory_->FreePendingToken(buffer->address_, token);
  59   buffer->size_ = 0;
  60   buffer->shm_id_ = 0;
  61   buffer->shm_offset_ = 0;
  62   buffer->address_ = NULL;
  63   buffer->last_usage_token_ = 0;
  64   buffer->last_async_upload_token_ = 0;
  65 }
  66
  67 void BufferTracker::Unmanage(Buffer* buffer) {
  68   buffer->size_ = 0;
  69   buffer->shm_id_ = 0;
  70   buffer->shm_offset_ = 0;
  71   buffer->address_ = NULL;
  72   buffer->last_usage_token_ = 0;
  73   buffer->last_async_upload_token_ = 0;
  74 }
  75
  76 void BufferTracker::Free(Buffer* buffer) {
  77   if (buffer->address_)
  78     mapped_memory_->Free(buffer->address_);
  79
  80   buffer->size_ = 0;
  81   buffer->shm_id_ = 0;
  82   buffer->shm_offset_ = 0;
  83   buffer->address_ = NULL;
  84   buffer->last_usage_token_ = 0;
  85   buffer->last_async_upload_token_ = 0;
  86 }
  87
  88 }  // namespace gles2
  89 }  // namespace gpu