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// Check that omp atomic is permitted and behaves when strictly nested within
// omp teams. This is an extension to OpenMP 5.2 and is enabled by default.
// RUN: %libomp-compile-and-run | FileCheck %s
// GCC has really limited OpenMP 5.2 support yet.
// UNSUPPORTED: gcc
#include <omp.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
// High parallelism increases our chances of detecting a lack of atomicity.
#define NUM_TEAMS_TRY 256
int main() {
// CHECK: update: num_teams=[[#NUM_TEAMS:]]{{$}}
// CHECK-NEXT: update: x=[[#NUM_TEAMS]]{{$}}
int x = 0;
int numTeams;
#pragma omp teams num_teams(NUM_TEAMS_TRY)
{
#pragma omp atomic update
++x;
if (omp_get_team_num() == 0)
numTeams = omp_get_num_teams();
}
printf("update: num_teams=%d\n", numTeams);
printf("update: x=%d\n", x);
// CHECK-NEXT: capture: x=[[#NUM_TEAMS]]{{$}}
// CHECK-NEXT: capture: xCapturedCount=[[#NUM_TEAMS]]{{$}}
bool xCaptured[numTeams];
memset(xCaptured, 0, sizeof xCaptured);
x = 0;
#pragma omp teams num_teams(NUM_TEAMS_TRY)
{
int v;
#pragma omp atomic capture
v = x++;
xCaptured[v] = true;
}
printf("capture: x=%d\n", x);
int xCapturedCount = 0;
for (int i = 0; i < numTeams; ++i) {
if (xCaptured[i])
++xCapturedCount;
}
printf("capture: xCapturedCount=%d\n", xCapturedCount);
return 0;
}
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