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# example by Roger Pau Monn'e
import numpy as np
import pyopencl as cl
demo_r = np.empty((500, 5), dtype=np.uint32)
ctx = cl.create_some_context()
queue = cl.CommandQueue(ctx)
mf = cl.mem_flags
demo_buf = cl.Buffer(ctx, mf.WRITE_ONLY, demo_r.nbytes)
prg = cl.Program(ctx,
"""
__kernel void demo(__global uint *demo)
{
int i;
int gid = get_global_id(0);
for(i=0; i<5;i++)
{
demo[gid*5+i] = (uint) 1;
}
}""")
try:
prg.build()
except Exception:
print("Error:")
print(prg.get_build_info(ctx.devices[0], cl.program_build_info.LOG))
raise
prg.demo(queue, (500,), None, demo_buf)
cl.enqueue_copy(queue, demo_r, demo_buf).wait()
for res in demo_r:
print(res)
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