mirror of
https://github.com/RT-Thread/rt-thread.git
synced 2026-09-22 19:44:24 +08:00
[klibc] add kerrno.h
This commit is contained in:
Meco Man
Rbb666
@@ -0,0 +1,169 @@
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/*
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* Copyright (c) 2006-2024, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2024-09-22 Meco Man the first version
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*/
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#include <rtthread.h>
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#define DBG_TAG "kernel.errno"
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#ifdef RT_DEBUG_DEVICE
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#define DBG_LVL DBG_LOG
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#else
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#define DBG_LVL DBG_WARNING
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#endif /* defined (RT_DEBUG_DEVICE) */
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#include <rtdbg.h>
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/**
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* @brief A global variable used to store the error code.
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*
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* This volatile static integer is used to store the most recent error code globally.
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* Its volatile nature ensures that every read operation fetches the most current value,
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* providing real-time error status across different parts of the program.
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*/
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static volatile int __rt_errno;
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/**
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* @struct _errno_str_t
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* @brief Structure for mapping error codes to corresponding error strings.
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*
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* This structure is used to create a mapping that associates an rt_err_t type error code
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* with a corresponding error description string.
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*/
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struct _errno_str_t
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{
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rt_err_t error; /**< Error code of type rt_err_t, representing different kinds of errors. */
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const char *str; /**< Pointer to the error description string. */
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};
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/**
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* @brief An array containing mappings of error codes to their corresponding error strings.
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*
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* This array uses the _errno_str_t structure to define several error codes and their
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* corresponding error description strings. These mappings can be used at runtime
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* to provide more readable error information.
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*/
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static struct _errno_str_t rt_errno_strs[] =
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{
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{RT_EOK , "OK "}, /**< Operation successful. */
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{RT_ERROR , "ERROR "}, /**< General error. */
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{RT_ETIMEOUT, "ETIMOUT"}, /**< Operation timed out. */
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{RT_EFULL , "ERSFULL"}, /**< Resource is full. */
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{RT_EEMPTY , "ERSEPTY"}, /**< Resource is empty. */
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{RT_ENOMEM , "ENOMEM "}, /**< Not enough memory. */
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{RT_ENOSYS , "ENOSYS "}, /**< Function not implemented. */
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{RT_EBUSY , "EBUSY "}, /**< Resource is busy. */
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{RT_EIO , "EIO "}, /**< Input/output error. */
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{RT_EINTR , "EINTRPT"}, /**< Interrupted system call. */
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{RT_EINVAL , "EINVAL "}, /**< Invalid argument. */
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{RT_ENOENT , "ENOENT "}, /**< No such file or directory. */
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{RT_ENOSPC , "ENOSPC "}, /**< No space left on device. */
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{RT_EPERM , "EPERM "}, /**< Operation not permitted. */
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{RT_ETRAP , "ETRAP "}, /**< Trap error. */
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};
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/**
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* @brief This function return a pointer to a string that contains the
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* message of error.
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*
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* @param error the errorno code
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* @return a point to error message string
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*/
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const char *rt_strerror(rt_err_t error)
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{
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int i = 0;
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if (error < 0)
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error = -error;
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for (i = 0; i < sizeof(rt_errno_strs) / sizeof(rt_errno_strs[0]); i++)
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{
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if (rt_errno_strs[i].error == error)
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return rt_errno_strs[i].str;
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}
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return "EUNKNOW";
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}
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RTM_EXPORT(rt_strerror);
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/**
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* @brief This function gets the global errno for the current thread.
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*
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* @return errno
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*/
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rt_err_t rt_get_errno(void)
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{
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rt_thread_t tid = RT_NULL;
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if (rt_interrupt_get_nest() != 0)
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{
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/* it's in interrupt context */
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return __rt_errno;
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}
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tid = rt_thread_self();
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if (tid == RT_NULL)
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{
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return __rt_errno;
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}
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return tid->error;
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}
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RTM_EXPORT(rt_get_errno);
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/**
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* @brief This function sets the global errno for the current thread.
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*
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* @param error is the errno shall be set.
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*/
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void rt_set_errno(rt_err_t error)
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{
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rt_thread_t tid = RT_NULL;
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if (rt_interrupt_get_nest() != 0)
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{
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/* it's in interrupt context */
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__rt_errno = error;
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return;
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}
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tid = rt_thread_self();
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if (tid == RT_NULL)
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{
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__rt_errno = error;
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return;
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}
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tid->error = error;
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}
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RTM_EXPORT(rt_set_errno);
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/**
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* @brief This function returns the address of the current thread errno.
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*
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* @return The errno address.
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*/
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int *_rt_errno(void)
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{
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rt_thread_t tid = RT_NULL;
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if (rt_interrupt_get_nest() != 0)
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{
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return (int *)&__rt_errno;
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}
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tid = rt_thread_self();
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if (tid != RT_NULL)
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{
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return (int *) & (tid->error);
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}
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return (int *)&__rt_errno;
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}
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RTM_EXPORT(_rt_errno);
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+1
-156
@@ -8,10 +8,7 @@
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* 2024-03-10 Meco Man the first version
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*/
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#include <rtdef.h>
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#include <rtcompiler.h>
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#include <rtklibc.h>
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#include <rtm.h>
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#include <rtthread.h>
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#define DBG_TAG "kernel.stdio"
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#ifdef RT_DEBUG_DEVICE
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@@ -684,155 +681,3 @@ int rt_sprintf(char *buf, const char *format, ...)
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return n;
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}
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RTM_EXPORT(rt_sprintf);
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/* errno functions */
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/**
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* @brief A global variable used to store the error code.
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*
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* This volatile static integer is used to store the most recent error code globally.
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* Its volatile nature ensures that every read operation fetches the most current value,
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* providing real-time error status across different parts of the program.
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*/
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static volatile int __rt_errno;
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/**
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* @struct _errno_str_t
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* @brief Structure for mapping error codes to corresponding error strings.
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*
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* This structure is used to create a mapping that associates an rt_err_t type error code
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* with a corresponding error description string.
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*/
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struct _errno_str_t
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{
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rt_err_t error; /**< Error code of type rt_err_t, representing different kinds of errors. */
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const char *str; /**< Pointer to the error description string. */
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};
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/**
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* @brief An array containing mappings of error codes to their corresponding error strings.
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*
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* This array uses the _errno_str_t structure to define several error codes and their
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* corresponding error description strings. These mappings can be used at runtime
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* to provide more readable error information.
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*/
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static struct _errno_str_t rt_errno_strs[] =
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{
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{RT_EOK , "OK "}, /**< Operation successful. */
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{RT_ERROR , "ERROR "}, /**< General error. */
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{RT_ETIMEOUT, "ETIMOUT"}, /**< Operation timed out. */
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{RT_EFULL , "ERSFULL"}, /**< Resource is full. */
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{RT_EEMPTY , "ERSEPTY"}, /**< Resource is empty. */
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{RT_ENOMEM , "ENOMEM "}, /**< Not enough memory. */
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{RT_ENOSYS , "ENOSYS "}, /**< Function not implemented. */
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{RT_EBUSY , "EBUSY "}, /**< Resource is busy. */
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{RT_EIO , "EIO "}, /**< Input/output error. */
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{RT_EINTR , "EINTRPT"}, /**< Interrupted system call. */
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{RT_EINVAL , "EINVAL "}, /**< Invalid argument. */
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{RT_ENOENT , "ENOENT "}, /**< No such file or directory. */
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{RT_ENOSPC , "ENOSPC "}, /**< No space left on device. */
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{RT_EPERM , "EPERM "}, /**< Operation not permitted. */
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{RT_ETRAP , "ETRAP "}, /**< Trap error. */
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};
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/**
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* @brief This function return a pointer to a string that contains the
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* message of error.
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*
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* @param error the errorno code
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* @return a point to error message string
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*/
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const char *rt_strerror(rt_err_t error)
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{
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int i = 0;
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if (error < 0)
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error = -error;
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for (i = 0; i < sizeof(rt_errno_strs) / sizeof(rt_errno_strs[0]); i++)
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{
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if (rt_errno_strs[i].error == error)
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return rt_errno_strs[i].str;
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}
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return "EUNKNOW";
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}
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RTM_EXPORT(rt_strerror);
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/**
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* @brief This function gets the global errno for the current thread.
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*
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* @return errno
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*/
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rt_err_t rt_get_errno(void)
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{
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rt_thread_t tid = RT_NULL;
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if (rt_interrupt_get_nest() != 0)
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{
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/* it's in interrupt context */
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return __rt_errno;
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}
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tid = rt_thread_self();
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if (tid == RT_NULL)
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{
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return __rt_errno;
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}
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return tid->error;
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}
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RTM_EXPORT(rt_get_errno);
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/**
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* @brief This function sets the global errno for the current thread.
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*
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* @param error is the errno shall be set.
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*/
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void rt_set_errno(rt_err_t error)
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{
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rt_thread_t tid = RT_NULL;
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if (rt_interrupt_get_nest() != 0)
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{
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/* it's in interrupt context */
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__rt_errno = error;
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return;
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}
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tid = rt_thread_self();
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if (tid == RT_NULL)
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{
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__rt_errno = error;
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return;
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}
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tid->error = error;
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}
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RTM_EXPORT(rt_set_errno);
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/**
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* @brief This function returns the address of the current thread errno.
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*
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* @return The errno address.
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*/
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int *_rt_errno(void)
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{
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rt_thread_t tid = RT_NULL;
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if (rt_interrupt_get_nest() != 0)
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{
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return (int *)&__rt_errno;
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}
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tid = rt_thread_self();
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if (tid != RT_NULL)
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{
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return (int *) & (tid->error);
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}
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return (int *)&__rt_errno;
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}
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RTM_EXPORT(_rt_errno);
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+1
-4
@@ -8,10 +8,7 @@
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* 2024-03-10 Meco Man the first version
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*/
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#include <rtdef.h>
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#include <rtcompiler.h>
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#include <rtklibc.h>
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#include <rtm.h>
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#include <rtthread.h>
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#ifdef RT_KLIBC_USING_STDLIB
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#include <string.h>
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#endif /* RT_KLIBC_USING_STDLIB */
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