1// RUN: %libomptarget-compile-run-and-check-generic
2
3// REQUIRES: unified_shared_memory
4// UNSUPPORTED: clang-6, clang-7, clang-8, clang-9
5
6#include <omp.h>
7#include <stdio.h>
8
9#pragma omp requires unified_shared_memory
10
11struct S {
12 int x;
13 int y;
14};
15
16int main(int argc, char *argv[]) {
17 int dev = omp_get_default_device();
18 struct S s = {10, 20};
19
20#pragma omp target enter data map(close, to : s)
21#pragma omp target map(alloc : s)
22 {
23 s.x = 11;
24 s.y = 21;
25 }
26// To determine whether x needs to be transfered or deleted, the runtime
27// cannot simply check whether unified shared memory is enabled and the
28// 'close' modifier is specified. It must check whether x was previously
29// placed in device memory by, for example, a 'close' modifier that isn't
30// specified here. The following struct member case checks a special code
31// path in the runtime implementation where members are transferred before
32// deletion of the struct.
33#pragma omp target exit data map(from : s.x, s.y)
34
35 // CHECK: s.x=11, s.y=21
36 printf(format: "s.x=%d, s.y=%d\n", s.x, s.y);
37 // CHECK: present: 0
38 printf(format: "present: %d\n", omp_target_is_present(&s, dev));
39
40 return 0;
41}
42

source code of offload/test/unified_shared_memory/close_member.c