Added base version of file system infrastructure. This includes a major

overhaul of the RTEMS system call interface.  This base file system is
the "In-Memory File System" aka IMFS.

The design and implementation was done by the following people:

  + Joel Sherrill (joel@OARcorp.com)
  + Jennifer Averett (jennifer@OARcorp.com)
  + Steve "Mr Mount" Salitasc (salitasc@OARcorp.com)
  + Kerwin Wade (wade@OARcorp.com)

PROBLEMS
========
  + It is VERY likely that merging this will break the UNIX port.  This
    can/will be fixed.

  + There is likely some reentrancy/mutual exclusion needed.

  + Eventually, there should be a "mini-IMFS" description table to
    eliminate links, symlinks, etc to save memory.  All you need to
    have "classic RTEMS" functionality is technically directories
    and device IO.  All the rest could be left out to save memory.

1 files changed, 24 insertions, 12 deletions

diff --git a/c/src/exec/libcsupport/src/__times.c b/c/src/exec/libcsupport/src/__times.c
index 635bf8e062..5f7525ec5f 100644
--- a/c/src/exec/libcsupport/src/__times.c
+++ b/c/src/exec/libcsupport/src/__times.c
@@ -1,6 +1,5 @@
 /*
- *  RTEMS _times Implementation
- *
+ *  times() - POSIX 1003.1b 4.5.2 - Get Process Times
  *
  *  COPYRIGHT (c) 1989-1998.
  *  On-Line Applications Research Corporation (OAR).
@@ -25,8 +24,8 @@ clock_t _times(
    struct tms  *ptms
 )
 {
-  rtems_status_code      status;
-  rtems_interval         ticks_since_boot;
+  rtems_status_code  status;
+  rtems_interval     ticks;
 
   if ( !ptms ) {
     errno = EFAULT;
@@ -34,21 +33,19 @@ clock_t _times(
   }
 
   /* "POSIX" does not seem to allow for not having a TOD */
-  status = rtems_clock_get(
-    RTEMS_CLOCK_GET_TICKS_SINCE_BOOT,
-    &ticks_since_boot
-  );
+  status = rtems_clock_get( RTEMS_CLOCK_GET_TICKS_SINCE_BOOT, &ticks );
   if ( status != RTEMS_SUCCESSFUL ) {
     assert( 0 );
     return -1;
   }
 
   /*
-   *  RTEMS has no notion of system versus user time and does
-   *  not (as of 3.2.0) keep track of CPU usage on a per task basis.
+   *  RTEMS has no notion of system versus user time and although
+   *  a way to keep track of per task CPU usage was added since
+   *  3.6.0, this routine does not utilize it yet.
    */
 
-  ptms->tms_utime  = ticks_since_boot;
+  ptms->tms_utime  = ticks;
   ptms->tms_stime  = 0;
   ptms->tms_cutime = 0;
   ptms->tms_cstime = 0;
@@ -56,6 +53,12 @@ clock_t _times(
   return 0;
 }
 
+/*
+ *  times()
+ *
+ *  times() system call wrapper for _times() above.
+ */
+
 clock_t times(
    struct tms  *ptms
 )
@@ -63,12 +66,21 @@ clock_t times(
   return _times( ptms );
 }
 
+/*
+ *  _times_r
+ *
+ *  This is the Newlib dependent reentrant version of times().
+ */
+
 #if defined(RTEMS_NEWLIB)
+
+#include <reent.h>
+
 clock_t _times_r(
    struct _reent *ptr,
    struct tms  *ptms
 )
 {
-  return _times(ptms);
+  return _times( ptms );
 }
 #endif