c - OpenCL:从 'int *' 到 '__generic int *__generic *' 的转换

Question

我想在两个内核之间的 OpenCL 2.0 中实现一个管道。然而，由于参数转换，内核编译失败:

error: no matching function for call to 'write_pipe'
write_pipe(outputPipe, &value);
^~~~~~~~~~
note: candidate function not viable: no known conversion from 'int *' to '__generic int *__generic *' for 2nd argument
note: candidate function not viable: requires 4 arguments, but 2 were provided

生产者内核非常简单:

__kernel void pipe_kernel(__write_only pipe int *outputPipe) {
  int value = 1;
  write_pipe(outputPipe, &value);
}

write_kernel函数的接口(interface):

int write_pipe (pipe gentype p, const gentype  *ptr)

主机代码中的管道设置为使用整数:

cl_mem pipe = clCreatePipe(context, CL_MEM_READ_WRITE, sizeof(int), elements, NULL, &status);
clSetKernelArg(pipe_kernel, 0, sizeof(cl_mem), &pipe);

管道是否必须考虑通用地址空间？

Answer 1

问题在于您的 pipe 内核参数被声明为指针:

__write_only pipe int *outputPipe

应该是:

__write_only pipe int outputPipe