cl.c

void * clSVMAlloc (cl_context context,  cl_svm_mem_flags flags,  size_t size, unsigned int alignment) {
    // flgs <- flags (some trnasform)
    return clCreateBuffer (context, flags, size,  NULL, NULL);
}


// ?
void clSVMFree (cl_context context,  void * svm_pointer);

// ?
cl_int clEnqueueSVMFree (...);


// enqueues a command to do a memcpy operation. 
cl_int clEnqueueSVMMemcpy (cl_command_queue command_queue, 
  cl_bool blocking_copy, 
  void *dst_ptr, 
  const void *src_ptr, 
  size_t size, 
  cl_uint num_events_in_wait_list, 
  const cl_event *event_wait_list, 
  cl_event *event) {
 
  // enqueues a command to copy a buffer object identified by src_buffer to another buffer object identified by dst_buffer. 
  cl_int clEnqueueCopyBuffer (cl_command_queue command_queue, 
    cl_mem src_buffer, 
    cl_mem dst_buffer, 
    size_t src_offset, 
    size_t dst_offset, 
    size_t size, 
    cl_uint num_events_in_wait_list, 
    const cl_event *event_wait_list, 
    cl_event *event)
 
}


// enqueues a command to fill a region in memory with a pattern of a given pattern size.
cl_int clEnqueueSVMMemFill (cl_command_queue command_queue, 
  void *svm_ptr, 
  const void *pattern, 
  size_t pattern_size, 
  size_t size, 
  cl_uint num_events_in_wait_list, 
  const cl_event *event_wait_list, 
  cl_event *event) {
 
  // enqueues a command to fill a buffer object with a pattern of a given pattern size.
  cl_int clEnqueueFillBuffer (cl_command_queue command_queue, 
    cl_mem buffer, 
    const void *pattern, 
    size_t pattern_size, 
    size_t offset, 
    size_t size, 
    cl_uint num_events_in_wait_list, 
    const cl_event *event_wait_list, 
    cl_event *event) 

 
 }
 
 
// enqueues a command that will allow the host to update a region of a SVM buffer.
// Note that since we are enqueuing a command with a SVM buffer, the region is already mapped in the host address space. 
cl_int clEnqueueSVMMap (cl_command_queue command_queue, 
  cl_bool blocking_map, 
  cl_map_flags map_flags, 
  void *svm_ptr, 
  size_t size, 
  cl_uint num_events_in_wait_list, 
  const cl_event *event_wait_list, 
  cl_event *event) {
 
  // enqueues a command to map a region of the buffer object given by buffer into the
  // host address space and returns a pointer to this mapped region.
  void * clEnqueueMapBuffer (cl_command_queue command_queue, 
    cl_mem buffer, 
    cl_bool blocking_map, 
    cl_map_flags map_flags, 
    size_t offset, 
    size_t size, 
    cl_uint num_events_in_wait_list, 
    const cl_event *event_wait_list, 
    cl_event *event, 
    cl_int *errcode_ret)

 
 }



// enqueues a command to indicate that the host has completed updating the region given by 
// svm_ptr and which was specified in a previous call to clEnqueueSVMMap. 
cl_int clEnqueueSVMUnmap (cl_command_queue command_queue, 
  void *svm_ptr, 
  cl_uint num_events_in_wait_list, 
  const cl_event *event_wait_list, 
  cl_event *event)  {
 
  // no unmap buffer? 
}

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