rt-thread-official/components/libc/newlib/syscalls.c

445 lines
7.2 KiB
C

#include <reent.h>
#include <sys/errno.h>
#include <sys/time.h>
#include <rtthread.h>
#ifdef RT_USING_DFS
#include <dfs_posix.h>
#endif
#ifdef RT_USING_PTHREADS
#include <pthread.h>
#endif
/* Reentrant versions of system calls. */
int
_close_r(struct _reent *ptr, int fd)
{
#ifndef RT_USING_DFS
return 0;
#else
return close(fd);
#endif
}
int
_execve_r(struct _reent *ptr, const char * name, char *const *argv, char *const *env)
{
/* return "not supported" */
ptr->_errno = ENOTSUP;
return -1;
}
int
_fcntl_r(struct _reent *ptr, int fd, int cmd, int arg)
{
/* return "not supported" */
ptr->_errno = ENOTSUP;
return -1;
}
int
_fork_r(struct _reent *ptr)
{
/* return "not supported" */
ptr->_errno = ENOTSUP;
return -1;
}
int
_fstat_r(struct _reent *ptr, int fd, struct stat *pstat)
{
/* return "not supported" */
ptr->_errno = ENOTSUP;
return -1;
}
int
_getpid_r(struct _reent *ptr)
{
return 0;
}
int
_isatty_r(struct _reent *ptr, int fd)
{
if (fd >=0 && fd < 3) return 1;
/* return "not supported" */
ptr->_errno = ENOTSUP;
return -1;
}
int
_kill_r(struct _reent *ptr, int pid, int sig)
{
/* return "not supported" */
ptr->_errno = ENOTSUP;
return -1;
}
int
_link_r(struct _reent *ptr, const char *old, const char *new)
{
/* return "not supported" */
ptr->_errno = ENOTSUP;
return -1;
}
_off_t
_lseek_r(struct _reent *ptr, int fd, _off_t pos, int whence)
{
#ifndef RT_USING_DFS
return 0;
#else
_off_t rc;
rc = lseek(fd, pos, whence);
return rc;
#endif
}
int
_mkdir_r(struct _reent *ptr, const char *name, int mode)
{
#ifndef RT_USING_DFS
return 0;
#else
int rc;
rc = mkdir(name, mode);
return rc;
#endif
}
int
_open_r(struct _reent *ptr, const char *file, int flags, int mode)
{
#ifndef RT_USING_DFS
return 0;
#else
int rc;
rc = open(file, flags, mode);
return rc;
#endif
}
_ssize_t
_read_r(struct _reent *ptr, int fd, void *buf, size_t nbytes)
{
#ifndef RT_USING_DFS
return 0;
#else
_ssize_t rc;
rc = read(fd, buf, nbytes);
return rc;
#endif
}
int
_rename_r(struct _reent *ptr, const char *old, const char *new)
{
#ifndef RT_USING_DFS
return 0;
#else
int rc;
rc = rename(old, new);
return rc;
#endif
}
void *
_sbrk_r(struct _reent *ptr, ptrdiff_t incr)
{
/* no use this routine to get memory */
return RT_NULL;
}
int
_stat_r(struct _reent *ptr, const char *file, struct stat *pstat)
{
#ifndef RT_USING_DFS
return 0;
#else
int rc;
rc = stat(file, pstat);
return rc;
#endif
}
_CLOCK_T_
_times_r(struct _reent *ptr, struct tms *ptms)
{
/* return "not supported" */
ptr->_errno = ENOTSUP;
return -1;
}
int
_unlink_r(struct _reent *ptr, const char *file)
{
#ifndef RT_USING_DFS
return 0;
#else
int rc;
rc = unlink(file);
return rc;
#endif
}
int
_wait_r(struct _reent *ptr, int *status)
{
/* return "not supported" */
ptr->_errno = ENOTSUP;
return -1;
}
#ifdef RT_USING_DEVICE
_ssize_t
_write_r(struct _reent *ptr, int fd, const void *buf, size_t nbytes)
{
if (fd < 3)
{
#ifdef RT_USING_CONSOLE
rt_device_t console_device;
extern rt_device_t rt_console_get_device(void);
console_device = rt_console_get_device();
if (console_device != 0) rt_device_write(console_device, 0, buf, nbytes);
return nbytes;
#else
return 0;
#endif
}
else
{
#ifdef RT_USING_DFS
_ssize_t rc;
rc = write(fd, buf, nbytes);
return rc;
#else
return 0;
#endif
}
}
#endif
#ifndef RT_USING_PTHREADS
#ifndef MILLISECOND_PER_SECOND
#define MILLISECOND_PER_SECOND 1000UL
#endif
#ifndef MICROSECOND_PER_SECOND
#define MICROSECOND_PER_SECOND 1000000UL
#endif
#ifndef NANOSECOND_PER_SECOND
#define NANOSECOND_PER_SECOND 1000000000UL
#endif
#define MILLISECOND_PER_TICK (MILLISECOND_PER_SECOND / RT_TICK_PER_SECOND)
#define MICROSECOND_PER_TICK (MICROSECOND_PER_SECOND / RT_TICK_PER_SECOND)
#define NANOSECOND_PER_TICK (NANOSECOND_PER_SECOND / RT_TICK_PER_SECOND)
struct timeval _timevalue = {0};
#ifdef RT_USING_DEVICE
static void libc_system_time_init(void)
{
time_t time;
rt_tick_t tick;
rt_device_t device;
time = 0;
device = rt_device_find("rtc");
if (device != RT_NULL)
{
/* get realtime seconds */
rt_device_control(device, RT_DEVICE_CTRL_RTC_GET_TIME, &time);
}
/* get tick */
tick = rt_tick_get();
_timevalue.tv_usec = MICROSECOND_PER_SECOND - (tick%RT_TICK_PER_SECOND) * MICROSECOND_PER_TICK;
_timevalue.tv_sec = time - tick/RT_TICK_PER_SECOND - 1;
}
#endif
int libc_get_time(struct timespec *time)
{
rt_tick_t tick;
static rt_bool_t inited = 0;
RT_ASSERT(time != RT_NULL);
/* initialize system time */
if (inited == 0)
{
libc_system_time_init();
inited = 1;
}
/* get tick */
tick = rt_tick_get();
time->tv_sec = _timevalue.tv_sec + tick / RT_TICK_PER_SECOND;
time->tv_nsec = (_timevalue.tv_usec + (tick % RT_TICK_PER_SECOND) * NANOSECOND_PER_TICK) * 1000;
return 0;
}
int
_gettimeofday_r(struct _reent *ptr, struct timeval *__tp, void *__tzp)
{
struct timespec tp;
if (libc_get_time(&tp) == 0)
{
if (__tp != RT_NULL)
{
__tp->tv_sec = tp.tv_sec;
__tp->tv_usec = tp.tv_nsec * 1000UL;
}
return tp.tv_sec;
}
/* return "not supported" */
ptr->_errno = ENOTSUP;
return -1;
}
#else
/* POSIX thread provides clock_gettime function */
#include <time.h>
int
_gettimeofday_r(struct _reent *ptr, struct timeval *__tp, void *__tzp)
{
struct timespec tp;
if (clock_gettime(CLOCK_REALTIME, &tp) == 0)
{
if (__tp != RT_NULL)
{
__tp->tv_sec = tp.tv_sec;
__tp->tv_usec = tp.tv_nsec * 1000UL;
}
return tp.tv_sec;
}
/* return "not supported" */
ptr->_errno = ENOTSUP;
return -1;
}
#endif
/* Memory routine */
void *
_malloc_r (struct _reent *ptr, size_t size)
{
void* result;
result = (void*)rt_malloc (size);
if (result == RT_NULL)
{
ptr->_errno = ENOMEM;
}
return result;
}
void *
_realloc_r (struct _reent *ptr, void *old, size_t newlen)
{
void* result;
result = (void*)rt_realloc (old, newlen);
if (result == RT_NULL)
{
ptr->_errno = ENOMEM;
}
return result;
}
void *_calloc_r (struct _reent *ptr, size_t size, size_t len)
{
void* result;
result = (void*)rt_calloc (size, len);
if (result == RT_NULL)
{
ptr->_errno = ENOMEM;
}
return result;
}
void
_free_r (struct _reent *ptr, void *addr)
{
rt_free (addr);
}
void
_exit (int status)
{
#ifdef RT_USING_MODULE
rt_module_t module;
module = rt_module_self();
if (module != RT_NULL)
{
struct rt_list_node *list;
struct rt_object *object;
rt_enter_critical();
/* delete all threads in the module */
list = &module->module_object[RT_Object_Class_Thread].object_list;
while (list->next != list)
{
object = rt_list_entry(list->next, struct rt_object, list);
if (rt_object_is_systemobject(object) == RT_TRUE)
{
/* detach static object */
rt_thread_detach((rt_thread_t)object);
}
else
{
/* delete dynamic object */
rt_thread_delete((rt_thread_t)object);
}
}
/* delete main thread */
rt_thread_delete(module->module_thread);
rt_exit_critical();
/* re-schedule */
rt_schedule();
}
#endif
rt_kprintf("thread:%s exit with %d\n", rt_thread_self()->name, status);
RT_ASSERT(0);
while (1);
}
void
_system(const char *s)
{
/* not support this call */
return;
}