Completes coding of the PWM module

git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4200 7fd9a85b-ad96-42d3-883c-3090e2eb8679
2026-10-27 13:33:33 +08:00 · 2011-12-19 19:24:09 +00:00
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+/****************************************************************************
+ * binfmt/binfmt_loadmodule.c
+ *
+ *   Copyright (C) 2009 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 NuttX 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>
+
+#include <sched.h>
+#include <debug.h>
+#include <errno.h>
+
+#include <nuttx/binfmt.h>
+
+#include "binfmt_internal.h"
+
+#ifndef CONFIG_BINFMT_DISABLE
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: load_module
+ *
+ * Description:
+ *   Load a module into memory, bind it to an exported symbol take, and
+ *   prep the module for execution.
+ *
+ * Returned Value:
+ *   This is an end-user function, so it follows the normal convention:
+ *   Returns 0 (OK) on success.  On failure, it returns -1 (ERROR) with
+ *   errno set appropriately.
+ *
+ ****************************************************************************/
+
+int load_module(FAR struct binary_s *bin)
+{
+  FAR struct binfmt_s *binfmt;
+  int ret = -ENOENT;
+
+#ifdef CONFIG_DEBUG
+  if (bin && bin->filename)
+#endif
+    {
+      bdbg("Loading %s\n", bin->filename);
+
+      /* Disabling pre-emption should be sufficient protection while
+       * accessing the list of registered binary format handlers.
+       */
+
+      sched_lock();
+
+      /* Traverse the list of registered binary format handlers.  Stop
+       * when either (1) a handler recognized and loads the format, or
+       * (2) no handler recognizes the format.
+       */
+
+      for (binfmt = g_binfmts; binfmt; binfmt = binfmt->next)
+        {
+          /* Use this handler to try to load the format */
+
+          ret = binfmt->load(bin);
+          if (ret == OK)
+            {
+              /* Successfully loaded -- break out with ret == 0 */
+
+              bvdbg("Successfully loaded module %s\n", bin->filename);
+              dump_module(bin);
+              break;
+            }
+        }
+
+      sched_unlock();
+    }
+
+  /* This is an end-user function.  Return failures via errno */
+
+  if (ret < 0)
+    {
+      bdbg("Returning errno %d\n", -ret);
+      errno = -ret;
+      return ERROR;
+    }
+  return OK;
+}
+
+#endif /* CONFIG_BINFMT_DISABLE */
+