Revert "ctype_buffer to a helper since it can be shared with others"

This reverts commit 141dd63.

test/helpers.py

@@ -27,5 +27,3 @@ def cuda_compile(prg, options, f, check):
   status = f.compile(prog, len(options), to_char_p_p(options))
   if status != 0: raise RuntimeError(f"compile failed: {get_bytes(prog, f.getLogSize, f.getLog, check)}")
   return get_bytes(prog, f.getCodeSize, f.getCode, check)
-
-def ctype_buffer(dtype, sz: int, data): return (dtype * sz)(*data)

test/test_opencl.py

@@ -1,7 +1,7 @@
 from typing import Optional
 import ctypes
 import unittest
-from helpers import ctype_buffer, to_char_p_p
+from helpers import to_char_p_p
 import gpuctypes.opencl as cl
 
 def check(status, info:Optional[str]=None):
@@ -80,9 +80,9 @@ def test_run_program(self):
     check(status.value)
     assert kernel is not None
 
-    A = ctype_buffer(ctypes.c_int32, 5, ())
-    B = ctype_buffer(ctypes.c_int32, 5, (1,2,3,4,5))
-    C = ctype_buffer(ctypes.c_int32, 5, (5,4,3,2,1))
+    A = (ctypes.c_int32 * 5)()
+    B = (ctypes.c_int32 * 5)(1, 2, 3, 4, 5)
+    C = (ctypes.c_int32 * 5)(5, 4, 3, 2, 1)
 
     bufA = cl.clCreateBuffer(self.context, cl.CL_MEM_WRITE_ONLY, ctypes.sizeof(A), None, ctypes.byref(status))
     bufB = cl.clCreateBuffer(self.context, cl.CL_MEM_READ_ONLY | cl.CL_MEM_COPY_HOST_PTR, ctypes.sizeof(B), ctypes.byref(B), ctypes.byref(status))