Thread Groups
struct ThreadGroup {
static constexpr cuda::thread_scope thread_scope;
Integral size() const;
Integral thread_rank() const;
void sync() const;
};
The ThreadGroup concept defines the requirements of a type that represents a group of cooperating threads.
The CUDA Cooperative Groups Library provides a number of types that satisfy this concept.
Data Members
thread_scope | The scope at which ThreadGroup::sync() synchronizes memory operations and thread execution. |
Member Functions
size | Returns the number of participating threads. |
thread_rank | Returns a unique value for each participating thread (0 <= ThreadGroup::thread_rank() < ThreadGroup::size()). |
sync | Synchronizes the participating threads. |
Notes
This concept is defined for documentation purposes but is not materialized in the library.
Example
#include <cuda/atomic>
#include <cuda/std/cstddef>
struct single_thread_group {
static constexpr cuda::thread_scope thread_scope = cuda::thread_scope::thread_scope_thread;
cuda::std::size_t size() const { return 1; }
cuda::std::size_t thread_rank() const { return 0; }
void sync() const {}
};