src/BulletMultiThreaded/GpuSoftBodySolvers/OpenCL/btSoftBodySolverBuffer_OpenCL.h

   1 /*\r
   2 Bullet Continuous Collision Detection and Physics Library\r
   3 Copyright (c) 2003-2006 Erwin Coumans  http://continuousphysics.com/Bullet/\r
   4 \r
   5 This software is provided 'as-is', without any express or implied warranty.\r
   6 In no event will the authors be held liable for any damages arising from the use of this software.\r
   7 Permission is granted to anyone to use this software for any purpose, \r
   8 including commercial applications, and to alter it and redistribute it freely, \r
   9 subject to the following restrictions:\r
  10 \r
  11 1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.\r
  12 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.\r
  13 3. This notice may not be removed or altered from any source distribution.\r
  14 */\r
  15 \r
  16 #ifndef BT_SOFT_BODY_SOLVER_BUFFER_OPENCL_H\r
  17 #define BT_SOFT_BODY_SOLVER_BUFFER_OPENCL_H\r
  18 \r
  19 // OpenCL support\r
  20 \r
  21 #ifdef USE_MINICL\r
  22         #include "MiniCL/cl.h"\r
  23 #else //USE_MINICL\r
  24         #ifdef __APPLE__\r
  25                 #include <OpenCL/OpenCL.h>\r
  26         #else\r
  27                 #include <CL/cl.h>\r
  28         #endif //__APPLE__\r
  29 #endif//USE_MINICL\r
  30 \r
  31 #ifndef SAFE_RELEASE\r
  32 #define SAFE_RELEASE(p)      { if(p) { (p)->Release(); (p)=NULL; } }\r
  33 #endif\r
  34 \r
  35 template <typename ElementType> class btOpenCLBuffer\r
  36 {\r
  37 public:\r
  38 \r
  39         cl_command_queue        m_cqCommandQue;\r
  40         cl_context                      m_clContext;\r
  41         cl_mem                          m_buffer;\r
  42 \r
  43 \r
  44 \r
  45         btAlignedObjectArray< ElementType > * m_CPUBuffer;\r
  46         \r
  47         int  m_gpuSize;\r
  48         bool m_onGPU;\r
  49         bool m_readOnlyOnGPU;\r
  50         bool m_allocated;\r
  51 \r
  52 \r
  53         bool createBuffer( cl_mem* preexistingBuffer = 0)\r
  54         {\r
  55 \r
  56                 cl_int err;\r
  57                  \r
  58 \r
  59                 if( preexistingBuffer )\r
  60                 {\r
  61                         m_buffer = *preexistingBuffer;\r
  62                 } \r
  63                 else {\r
  64 \r
  65                         cl_mem_flags flags= m_readOnlyOnGPU ? CL_MEM_READ_ONLY : CL_MEM_READ_WRITE;\r
  66 \r
  67                         size_t size = m_CPUBuffer->size() * sizeof(ElementType);\r
  68                         // At a minimum the buffer must exist\r
  69                         if( size == 0 )\r
  70                                 size = sizeof(ElementType);\r
  71                         m_buffer = clCreateBuffer(m_clContext, flags, size, 0, &err);\r
  72                         if( err != CL_SUCCESS )\r
  73                         {\r
  74                                 btAssert( "Buffer::Buffer(m_buffer)");\r
  75                         }\r
  76                 }\r
  77 \r
  78                 m_gpuSize = m_CPUBuffer->size();\r
  79 \r
  80                 return true;\r
  81         }\r
  82 \r
  83 public:\r
  84         btOpenCLBuffer( cl_command_queue        commandQue,cl_context ctx, btAlignedObjectArray< ElementType >* CPUBuffer, bool readOnly)\r
  85                 :m_cqCommandQue(commandQue),\r
  86                 m_clContext(ctx),\r
  87                 m_buffer(0),\r
  88                 m_CPUBuffer(CPUBuffer),\r
  89                 m_gpuSize(0),\r
  90                 m_onGPU(false),\r
  91                 m_readOnlyOnGPU(readOnly),\r
  92                 m_allocated(false)\r
  93         {\r
  94         }\r
  95 \r
  96         ~btOpenCLBuffer()\r
  97         {\r
  98                 clReleaseMemObject(m_buffer);\r
  99         }\r
 100 \r
 101 \r
 102         bool moveToGPU()\r
 103         {\r
 104 \r
 105 \r
 106                 cl_int err;\r
 107 \r
 108                 if( (m_CPUBuffer->size() != m_gpuSize) )\r
 109                 {\r
 110                         m_onGPU = false;\r
 111                 }\r
 112 \r
 113                 if( !m_allocated && m_CPUBuffer->size() == 0  )\r
 114                 {\r
 115                         // If it isn't on the GPU and yet there is no data on the CPU side this may cause a problem with some kernels.\r
 116                         // We should create *something* on the device side\r
 117                         if (!createBuffer()) {\r
 118                                 return false;\r
 119                         }\r
 120                         m_allocated = true;\r
 121                 }\r
 122 \r
 123                 if( !m_onGPU && m_CPUBuffer->size() > 0 )\r
 124                 {\r
 125                         if (!m_allocated || (m_CPUBuffer->size() != m_gpuSize)) {\r
 126                                 if (!createBuffer()) {\r
 127                                         return false;\r
 128                                 }\r
 129                                 m_allocated = true;\r
 130                         }\r
 131                         \r
 132                         size_t size = m_CPUBuffer->size() * sizeof(ElementType);\r
 133                         err = clEnqueueWriteBuffer(m_cqCommandQue,m_buffer,\r
 134                                 CL_FALSE,\r
 135                                 0,\r
 136                                 size, \r
 137                                 &((*m_CPUBuffer)[0]),0,0,0);\r
 138                         if( err != CL_SUCCESS )\r
 139                         {\r
 140                                 btAssert( "CommandQueue::enqueueWriteBuffer(m_buffer)" );\r
 141                         }\r
 142 \r
 143                         m_onGPU = true;\r
 144                 }\r
 145 \r
 146                 return true;\r
 147 \r
 148         }\r
 149 \r
 150         bool moveFromGPU()\r
 151         {\r
 152 \r
 153                 cl_int err;\r
 154 \r
 155                 if (m_CPUBuffer->size() > 0) {\r
 156                         if (m_onGPU && !m_readOnlyOnGPU) {\r
 157                                 size_t size = m_CPUBuffer->size() * sizeof(ElementType);\r
 158                                 err = clEnqueueReadBuffer(m_cqCommandQue,\r
 159                                         m_buffer,\r
 160                                         CL_TRUE,\r
 161                                         0,\r
 162                                         size,\r
 163                                         &((*m_CPUBuffer)[0]),0,0,0);\r
 164 \r
 165                                 if( err != CL_SUCCESS )\r
 166                                 {\r
 167                                         btAssert( "CommandQueue::enqueueReadBuffer(m_buffer)" );\r
 168                                 }\r
 169 \r
 170                                 m_onGPU = false;\r
 171                         }\r
 172                 }\r
 173 \r
 174                 return true;\r
 175         }\r
 176 \r
 177         bool copyFromGPU()\r
 178         {\r
 179 \r
 180                 cl_int err;\r
 181                 size_t size = m_CPUBuffer->size() * sizeof(ElementType);\r
 182 \r
 183                 if (m_CPUBuffer->size() > 0) {\r
 184                         if (m_onGPU && !m_readOnlyOnGPU) {\r
 185                                 err = clEnqueueReadBuffer(m_cqCommandQue,\r
 186                                         m_buffer,\r
 187                                         CL_TRUE,\r
 188                                         0,size, \r
 189                                         &((*m_CPUBuffer)[0]),0,0,0);\r
 190 \r
 191                                 if( err != CL_SUCCESS )\r
 192                                 {\r
 193                                         btAssert( "CommandQueue::enqueueReadBuffer(m_buffer)");\r
 194                                 }\r
 195 \r
 196                         }\r
 197                 }\r
 198 \r
 199                 return true;\r
 200         }\r
 201 \r
 202         virtual void changedOnCPU()\r
 203         {\r
 204                 m_onGPU = false;\r
 205         }\r
 206 }; // class btOpenCLBuffer\r
 207 \r
 208 \r
 209 #endif // #ifndef BT_SOFT_BODY_SOLVER_BUFFER_OPENCL_H