Add basic tasking support for environment variables

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@291 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 92 insertions, 0 deletions

diff --git a/nuttx/sched/env_getenvironptr.c b/nuttx/sched/env_getenvironptr.c
new file mode 100644
index 000000000..4c01250b4
--- /dev/null
+++ b/nuttx/sched/env_getenvironptr.c
@@ -0,0 +1,92 @@
+/****************************************************************************
+ * env_getenvironptr.c
+ *
+ *   Copyright (C) 2007 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name Gregory Nutt nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#ifndef CONFIG_DISABLE_ENVIRON
+
+#include <sched.h>
+#include <stdlib.h>
+#include "os_internal.h"
+
+#undef get_environ_ptr
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function:  get_environ_ptr
+ *
+ * Description:
+ *   Return a pointer to the thread specific environ variable.
+ *
+ * Parameters:
+ *   None
+ *
+ * Return Value:
+ *   A pointer to the per-thread environ variable.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+FAR char **get_environ_ptr( void )
+{
+  /* Return a reference to the thread-private environ in the TCB.*/
+
+  FAR _TCB *ptcb = (FAR _TCB*)g_readytorun.head;
+  if (ptcb->envp)
+    {
+      return &ptcb->envp->ev_env;
+    }
+  else
+    {
+      return NULL;
+    }
+}
+
+#endif /* CONFIG_DISABLE_ENVIRON */
+
+
+