1 files changed, 0 insertions, 108 deletions
diff --git a/c/src/exec/libcsupport/src/envlock.c b/c/src/exec/libcsupport/src/envlock.c
deleted file mode 100644
index 444d0e6b63..0000000000
--- a/c/src/exec/libcsupport/src/envlock.c
+++ /dev/null
@@ -1,108 +0,0 @@
-/*
- *  Author: Till Straumann <strauman@slac.stanford.edu>, 3/2002
- * 
- *  $Id$
- */
-
-/* provide locking for the global environment 'environ' */
-
-#if HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include <rtems.h>
-#include <sys/reent.h>
-
-#include <assert.h>
-
-/*
- * NOTES:
- *  - although it looks like a classical multiple-readers / single writer (MRSW)
- *    locking problem, we still use a single lock for the following reasons:
- *     1) newlib has no provision / hook for calling different locking routines
- *        from setenv/putenv and getenv, respectively.
- *     2) MRSW involves calling several semaphore-primitives, even in the most
- *        likely case of a first-reader's access. This probably takes more CPU
- *        time than just waiting until another reader is done; environment
- *        access is fast.
- *  - the lock implementation must allow nesting (same thread may call
- *    lock-lock-unlock-unlock).
- *  - NEWLIB-1.8.2 has an ugly BUG: if environ is NULL, _findenv_r() bails
- *    out leaving the lock held :-(
- *
- *  Used by the following functions:
- *    findenv_r(), setenv_r(), and unsetenv_r() which are called by
- *    getenv(), getenv_r(), setenv(), and unsetenv().
- *  
- */
-
-#if defined(ENVLOCK_DEDIDCATED_MUTEX)
-static rtems_id envLock=0;
-
-static void
-__rtems_envlock_init(void)
-{
-  extern char        **environ;
-  rtems_status_code    rc;
-
-  if (envLock) /* already initialized */
-    return;
-
-  assert(environ && "MUST have non-NULL 'environ' due to newlib bug");
-
-  rc = rtems_semaphore_create(
-      rtems_build_name('E','N','V','S'),
-      1,
-      RTEMS_BINARY_SEMAPHORE | RTEMS_PRIORITY | RTEMS_INHERIT_PRIORITY,
-      0,
-      &envLock);
-  if (RTEMS_SUCCESSFUL!=rc)
-    rtems_fatal_error_occurred(rc);
-}
-
-void
-__env_lock(struct _reent *r)
-{
-  /* Do lazy init */
-  if (!envLock)
-    __rtems_envlock_init();
-  /*
-   *  Must not use a semaphore before pre-tasking hook is called.
-   *  - it will corrupt memory :-(
-   */
-
-  if (_Thread_Executing)
-    rtems_semaphore_obtain(envLock, RTEMS_WAIT, RTEMS_NO_TIMEOUT);
-}
-
-void
-__env_unlock(struct _reent *r)
-{
-  /*
-   *  Must not use a semaphore before pre-tasking hook is called.
-   * - it will corrupt memory :-(
-   */
-  if (_Thread_Executing)
-    rtems_semaphore_release(envLock);
-}
-#else
-
-/*
- *  Reuse the libio mutex -- it is always initialized before we
- *  could possibly run.
- */
-
-#include <rtems/libio_.h>
-
-void
-__env_lock(struct _reent *r)
-{
-  rtems_semaphore_obtain( rtems_libio_semaphore, RTEMS_WAIT, RTEMS_NO_TIMEOUT );
-}
-
-void
-__env_unlock(struct _reent *r)
-{
-  rtems_semaphore_release( rtems_libio_semaphore );
-}
-#endif