Call atomics from TestAtomic.c

This exposes more compile-time errors than simply parsing
the definitions. This makes CMake's diagnostics more useful
with respect to atomic operations.

Fixes #1355

Change-Id: Ie1d6f14565700b98988cadc17cb7ac2b78d76ce3

diff --git a/cmake/TestAtomics.c b/cmake/TestAtomics.c
index ebc7f6b002dd4082cdb543bf863034d0336ee722..b5679569c8b75666c7a4e567a657ef17f133ea77 100644 (file)
--- a/cmake/TestAtomics.c
+++ b/cmake/TestAtomics.c
@@ -4,5 +4,33 @@
 
 int main(void)
 {
-    return 0;
+    int i;
+    void *ptr;
+    tMPI_Atomic_t some_atomic;
+    tMPI_Atomic_ptr_t *some_atomic_ptr = NULL;
+    tMPI_Spinlock_t some_spinlock;
+
+    /* Make the compiler actually emit code for these functions, so
+       that things like inability to emit inline assembly get
+       tested. It is not expected that the code below can run. */
+    tMPI_Atomic_memory_barrier();
+    tMPI_Atomic_memory_barrier_acq();
+    tMPI_Atomic_memory_barrier_rel();
+    i = tMPI_Atomic_get(&some_atomic);
+    tMPI_Atomic_set(&some_atomic, 0);
+    ptr = tMPI_Atomic_ptr_get(some_atomic_ptr);
+    tMPI_Atomic_ptr_set(some_atomic_ptr, ptr);
+    tMPI_Atomic_add_return(&some_atomic, 0);
+    tMPI_Atomic_fetch_add(&some_atomic, 0);
+    tMPI_Atomic_cas(&some_atomic, 0, 1);
+    tMPI_Atomic_ptr_cas(some_atomic_ptr, ptr, ptr);
+    tMPI_Atomic_swap(&some_atomic, 0);
+    tMPI_Atomic_ptr_swap(some_atomic_ptr, ptr);
+    tMPI_Spinlock_init(&some_spinlock);
+    tMPI_Spinlock_lock(&some_spinlock);
+    tMPI_Spinlock_trylock(&some_spinlock);
+    tMPI_Spinlock_unlock(&some_spinlock);
+    tMPI_Spinlock_islocked(&some_spinlock);
+    tMPI_Spinlock_wait(&some_spinlock);
+return 0;
 }