oshmem: Align OSHMEM API with spec v1.2 (change examples)

ring_oshmem_c.c and hello_oshmem_c.c support new api
other examples support legacy api but warning message
is provided during compilation

examples/hello_oshmem_c.c

@@ -12,6 +12,10 @@
 #include <stdio.h>
 #include "shmem.h"
 
+#if !defined(OSHMEM_SPEC_VERSION) || OSHMEM_SPEC_VERSION < 10200
+#error This application uses API 1.2 and up
+#endif
+
 int main(int argc, char* argv[])
 {
     int proc, nproc;

examples/oshmem_circular_shift.c

@@ -11,6 +11,8 @@
 #include <stdio.h>
 #include <shmem.h>
 
+#warning This application uses deprecated API see http://www.open-mpi.org/
+
 int main (void)
 {
     static int aaa, bbb;

examples/oshmem_max_reduction.c

@@ -15,6 +15,8 @@
 
 #include <shmem.h>
 
+#warning This application uses deprecated API see http://www.open-mpi.org/
+
 long pSync[_SHMEM_BCAST_SYNC_SIZE];
 
 #define N 3

examples/oshmem_shmalloc.c

@@ -15,6 +15,8 @@
 
 #include <shmem.h>
 
+#warning This application uses deprecated API see http://www.open-mpi.org/
+
 int main(void)
 {
     long *x;

examples/oshmem_strided_puts.c

@@ -27,6 +27,8 @@
 #include <stdio.h>
 #include <shmem.h>
 
+#warning This application uses deprecated API see http://www.open-mpi.org/
+
 int main(void)
 {
     short source[10] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };

examples/oshmem_symmetric_data.c

@@ -11,6 +11,8 @@
 #include <stdio.h>
 #include <shmem.h>
 
+#warning This application uses deprecated API see http://www.open-mpi.org/
+
 #define SIZE 16
 
 int main(int argc, char* argv[])

examples/ring_oshmem_c.c

@@ -11,15 +11,19 @@
 #include <shmem.h>
 #include <stdio.h>
 
+#if !defined(OSHMEM_SPEC_VERSION) || OSHMEM_SPEC_VERSION < 10200
+#error This application uses API 1.2 and up
+#endif
+
 int main (int argc, char * argv[])
 {
     static int rbuf = -1;
     int proc, nproc, next;
     int message = 10;
 
-    start_pes(0);
-    proc = _my_pe();
-    nproc = _num_pes();
+    shmem_init();
+    nproc = shmem_n_pes();
+    proc = shmem_my_pe();
 
     /* Calculate the PE number of the next process in the ring.  Use the
        modulus operator so that the last process "wraps around" to PE 0. */
@@ -51,6 +55,7 @@ int main (int argc, char * argv[])
             --message;
         }
     }
+    shmem_finalize();
 
     /* All done */