Template Function thrust::uninitialized_fill(ForwardIterator, ForwardIterator, const T&)¶
Function Documentation¶
-
template<typename
ForwardIterator
, typenameT
>
voidthrust
::
uninitialized_fill
(ForwardIterator first, ForwardIterator last, const T &x) In
thrust
, the functionthrust::device_new
allocates memory for an object and then creates an object at that location by calling a constructor. Occasionally, however, it is useful to separate those two operations. If each iterator in the range[first, last)
points to uninitialized memory, thenuninitialized_fill
creates copies ofx
in that range. That is, for each iteratori
in the range[first, last)
,uninitialized_fill
creates a copy ofx
in the location pointed toi
by callingForwardIterator's
value_type's
copy constructor.The following code snippet demonstrates how to use
uninitialized_fill
to initialize a range of uninitialized memory.- Parameters
first
: The first element of the range of interest.last
: The last element of the range of interest.x
: The value to use as the exemplar of the copy constructor.
- Template Parameters
ForwardIterator
: is a model of Forward Iterator,ForwardIterator
is mutable, andForwardIterator's
value_type
has a constructor that takes a single argument of typeT
.
#include <thrust/uninitialized_fill.h> #include <thrust/device_malloc.h> struct Int { __host__ __device__ Int(int x) : val(x) {} int val; }; ... const int N = 137; Int val(46); thrust::device_ptr<Int> array = thrust::device_malloc<Int>(N); thrust::uninitialized_fill(array, array + N, val); // Int x = array[i]; // x.val == 46 for all 0 <= i < N
- See
- See
uninitialized_fill_n
- See
fill
- See
uninitialized_copy
- See
- See