thrust::generate_n

Defined in thrust/generate.h

template<typename DerivedPolicy, typename OutputIterator, typename Size, typename Generator> OutputIterator thrust::generate_n(const thrust::detail::execution_policy_base<DerivedPolicy> &exec, OutputIterator first, Size n, Generator gen)

generate_n assigns the result of invoking gen, a function object that takes no arguments, to each element in the range [first,first + n). The return value is first + n.

The algorithm’s execution is parallelized as determined by exec.

The following code snippet demonstrates how to fill a host_vector with random numbers, using the standard C library function rand using the thrust::host execution policy for parallelization:

#include <thrust/generate.h>
#include <thrust/host_vector.h>
#include <thrust/execution_policy.h>
#include <cstdlib>
...
thrust::host_vector<int> v(10);
srand(13);
thrust::generate_n(thrust::host, v.begin(), 10, rand);

// the elements of v are now pseudo-random numbers