clock_systimer needs the same fix as fore get/set_errno when used with system calls

2026-05-14 11:28:22 +08:00 · 2014-08-30 13:26:45 -06:00
parent 2906ff6a4a
commit a5cfd5deba
2 changed files with 113 additions and 3 deletions
@@ -0,0 +1,110 @@
+/************************************************************************
+ * include/nuttx/errno.h
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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.
+ *
+ ************************************************************************/
+
+#ifndef __INCLUDE_NUTTX_ERRNO_H
+#define __INCLUDE_NUTTX_ERRNO_H
+
+/************************************************************************
+ * Included Files
+ ************************************************************************/
+
+#include <nuttx/config.h>
+
+/* These must always be included before this file */
+
+#include <errno.h>
+#include <nuttx/clock.h>
+
+#ifdef CONFIG_LIB_SYSCALL
+
+/************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************/
+/* 'errno' and timer access is awkward.  We need to generate get_errno(),
+ * set_errno(), and clock_systimer() interfaces to support the system
+ * calls, even though we don't use them from within the OS.
+ *
+ * The "normal" pre-processor definitions for the errno functions are in
+ * errno.h and clock functions in nuttx/clock.h but we need the internal
+ * function prototypes in here because those may be macro-ized.
+ */
+
+#undef get_errno
+#undef set_errno
+#undef clock_systimer
+
+/************************************************************************
+ * Type Declarations
+ ************************************************************************/
+
+/************************************************************************
+ * Public Data
+ ************************************************************************/
+
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+/************************************************************************
+ * Public Function Prototypes
+ ************************************************************************/
+/* These get_errno(), set_errno(), and clock_systimer() functions are
+ * always exported as functions from the kernel always when the system
+ * call interface is built.  errno.h and nuttx/clock.h provide the
+ * context-specific usage interface for both the kernel- and
+ * user-spaces.  These may be different:  These interfaces may be macro-
+ * ized in those header files.
+ *
+ * This header file always exists to disambiguate the context.  The
+ * prototypes here duplicate those of errno.h and nuttx/clock.h and must
+ * exactly match.
+ */
+
+void set_errno(int errcode);
+int  get_errno(void);
+uint32_t clock_systimer(void);
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* CONFIG_LIB_SYSCALL */
+#endif /* __INCLUDE_NUTTX_ERRNO_H */