1 files changed, 135 insertions, 0 deletions
diff --git a/cpukit/include/rtems/posix/shmimpl.h b/cpukit/include/rtems/posix/shmimpl.h
new file mode 100644
index 0000000000..f16af8123d
--- /dev/null
+++ b/cpukit/include/rtems/posix/shmimpl.h
@@ -0,0 +1,135 @@
+/**
+ * @file
+ *
+ * @brief Private Support Information for POSIX Shared Memory
+ *
+ */
+
+/*
+ * 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.
+ */
+
+#ifndef _RTEMS_POSIX_SHMIMPL_H
+#define _RTEMS_POSIX_SHMIMPL_H
+
+#include <rtems/fs.h>
+#include <rtems/libio.h>
+#include <rtems/posix/posixapi.h>
+#include <rtems/posix/shm.h>
+#include <rtems/score/objectimpl.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @ingroup POSIXShmPrivate
+ * @{
+ */
+
+extern Objects_Information _POSIX_Shm_Information;
+
+RTEMS_INLINE_ROUTINE POSIX_Shm_Control *_POSIX_Shm_Allocate_unprotected( void )
+{
+  return (POSIX_Shm_Control *)
+    _Objects_Allocate_unprotected( &_POSIX_Shm_Information );
+}
+
+/**
+ * @brief POSIX Shared Memory Free
+ *
+ * This routine frees a shm control block.
+ */
+RTEMS_INLINE_ROUTINE void _POSIX_Shm_Free (
+  POSIX_Shm_Control *the_shm
+)
+{
+  _Objects_Free( &_POSIX_Shm_Information, &the_shm->Object );
+}
+
+RTEMS_INLINE_ROUTINE POSIX_Shm_Control *_POSIX_Shm_Get_by_name(
+  const char                *name,
+  size_t                    *name_length_p,
+  Objects_Get_by_name_error *error
+)
+{
+  return (POSIX_Shm_Control *) _Objects_Get_by_name(
+    &_POSIX_Shm_Information,
+    name,
+    name_length_p,
+    error
+  );
+}
+
+RTEMS_INLINE_ROUTINE void _POSIX_Shm_Update_atime(
+  POSIX_Shm_Control *shm
+)
+{
+  struct timeval now;
+  gettimeofday( &now, 0 );
+  shm->atime = now.tv_sec;
+}
+
+RTEMS_INLINE_ROUTINE void _POSIX_Shm_Update_mtime_ctime(
+  POSIX_Shm_Control *shm
+)
+{
+  struct timeval now;
+  gettimeofday( &now, 0 );
+  shm->mtime = now.tv_sec;
+  shm->ctime = now.tv_sec;
+}
+
+static inline POSIX_Shm_Control* iop_to_shm( rtems_libio_t *iop )
+{
+  return (POSIX_Shm_Control*) iop->data1;
+}
+
+static inline POSIX_Shm_Control* loc_to_shm(
+    const rtems_filesystem_location_info_t *loc
+)
+{
+  return (POSIX_Shm_Control*) loc->node_access;
+}
+
+static inline int POSIX_Shm_Attempt_delete(
+    POSIX_Shm_Control* shm
+)
+{
+  Objects_Control       *obj;
+  ISR_lock_Context       lock_ctx;
+  int err;
+
+  err = 0;
+
+  _Objects_Allocator_lock();
+  --shm->reference_count;
+  if ( shm->reference_count == 0 ) {
+    if ( (*shm->shm_object.ops->object_delete)( &shm->shm_object ) != 0 ) {
+      err = EIO;
+    }
+  }
+  /* check if the object has been unlinked yet. */
+  obj = _Objects_Get( shm->Object.id, &lock_ctx, &_POSIX_Shm_Information );
+  if ( obj == NULL ) {
+    /* if it was unlinked, then it can be freed. */
+    _POSIX_Shm_Free( shm );
+  } else {
+    /* it will be freed when it is unlinked. */
+    _ISR_lock_ISR_enable( &lock_ctx );
+  }
+  _Objects_Allocator_unlock();
+  return err;
+}
+
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif