P-FP: make PCP available to user space

      PCP was only used for DPCP before

tests: add some basic tests for PCP under P-FP

1 files changed, 54 insertions, 0 deletions

diff --git a/tests/pcp.c b/tests/pcp.c
new file mode 100644
index 0000000..a893da6
--- /dev/null
+++ b/tests/pcp.c
@@ -0,0 +1,54 @@
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdio.h>
+
+#include "tests.h"
+#include "litmus.h"
+
+
+TESTCASE(lock_pcp, P_FP,
+         "PCP acquisition and release")
+{
+        int fd, od, cpu = 0;
+
+        SYSCALL( fd = open(".pcp_locks", O_RDONLY | O_CREAT) );
+
+        SYSCALL( sporadic_partitioned(10, 100, cpu) );
+        SYSCALL( task_mode(LITMUS_RT_TASK) );
+
+        SYSCALL( od = open_pcp_sem(fd, 0, cpu) );
+
+        SYSCALL( litmus_lock(od) );
+        SYSCALL( litmus_unlock(od) );
+
+        SYSCALL( litmus_lock(od) );
+        SYSCALL( litmus_unlock(od) );
+
+        SYSCALL( litmus_lock(od) );
+        SYSCALL( litmus_unlock(od) );
+
+        /* tasks may not unlock resources they don't own */
+        SYSCALL_FAILS(EINVAL, litmus_unlock(od) );
+
+        SYSCALL( od_close(od) );
+
+        SYSCALL( close(fd) );
+
+        SYSCALL( remove(".pcp_locks") );
+}
+
+TESTCASE(not_lock_pcp_be, P_FP,
+         "don't let best-effort tasks lock PCP semaphores")
+{
+        int fd, od;
+
+        SYSCALL( fd = open(".pcp_locks", O_RDONLY | O_CREAT) );
+
+        /* BE task are not even allowed to open a PCP semaphore */
+        SYSCALL_FAILS(EPERM, od = open_pcp_sem(fd, 0, 1) );
+
+        SYSCALL( close(fd) );
+
+        SYSCALL( remove(".pcp_locks") );
+
+}