posix: shared memory support

Add POSIX shared memory manager (Shm). Includes a hook-based
approach for the backing memory storage that defaults to the
Workspace, and a test is provided using the heap. A test is
also provided for the basic use of mmap'ing a shared memory
object. This test currently fails at the mmap stage due to
no support for mmap.

1 files changed, 91 insertions, 0 deletions

diff --git a/testsuites/psxtests/psxshm01/init.c b/testsuites/psxtests/psxshm01/init.c
new file mode 100644
index 0000000000..24c9b9629f
--- /dev/null
+++ b/testsuites/psxtests/psxshm01/init.c
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2016 Gedare Bloom.
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.org/license/LICENSE.
+ */
+
+/*
+ * From http://pubs.opengroup.org/onlinepubs/9699919799/functions/shm_open.html
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#define CONFIGURE_INIT
+#include "system.h"
+#include "pritime.h"
+
+#include <sys/mman.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+
+const char rtems_test_name[] = "PSX SHM01";
+
+#define MAX_LEN 10000
+struct region {        /* Defines "structure" of shared memory */
+  int len;
+  char buf[MAX_LEN];
+};
+
+void *POSIX_Init(
+  void *argument
+)
+{
+  struct region *p;
+  int fd;
+  int err;
+  char *name = "/shm";
+
+  TEST_BEGIN();
+
+  puts( "Init: shm_open" );
+  fd = shm_open( name, O_CREAT | O_RDWR, S_IRUSR | S_IWUSR );
+  if ( fd == -1 ) {
+    printf ( "Error: %s\n", strerror(errno) );
+    rtems_test_assert( fd != -1 );
+  }
+
+  puts( "Init: ftruncate" );
+  err = ftruncate( fd, sizeof( struct region ) );
+  if ( err == -1 ) {
+    printf ( "Error: %s\n", strerror(errno) );
+    rtems_test_assert( err != -1 );
+  }
+
+  puts( "Init: mmap" );
+  p = mmap(
+    NULL,
+    sizeof( struct region ),
+    PROT_READ | PROT_WRITE, MAP_SHARED,
+    fd,
+    0
+  );
+  rtems_test_assert( p != MAP_FAILED );
+
+  puts( "Init: write to mapped region" );
+  p->len = MAX_LEN;
+
+  puts( "Init: munmap" );
+  err = munmap( p, sizeof( struct region ) );
+  if ( err == -1 ) {
+    printf ( "Error: %s\n", strerror(errno) );
+    rtems_test_assert( err != -1 );
+  }
+
+  puts( "Init: close" );
+  err = close( fd );
+  if ( err == -1 ) {
+    printf ( "Error: %s\n", strerror(errno) );
+    rtems_test_assert( err != -1 );
+  }
+
+  TEST_END();
+
+  rtems_test_exit(0);
+  return 0;
+}