int32 OS_open (const char *path, int32 access, uint32 mode)
{
int status;
char local_path[OS_MAX_LOCAL_PATH_LEN];
uint32 PossibleFD;
int perm;
/*
** Check to see if the path pointer is NULL
*/
if (path == NULL)
{
return OS_FS_ERR_INVALID_POINTER;
}
/*
** Check to see if the path is too long
*/
if (strlen(path) >= OS_MAX_PATH_LEN)
{
return OS_FS_ERR_PATH_TOO_LONG;
}
/*
** check if the name of the file is too long
*/
if (OS_check_name_length(path) != OS_FS_SUCCESS)
{
return OS_FS_ERR_NAME_TOO_LONG;
}
/*
** Check for a valid access mode
*/
switch(access)
{
case OS_READ_ONLY:
perm = O_RDONLY;
break;
case OS_WRITE_ONLY:
perm = O_WRONLY | O_CREAT;
break;
case OS_READ_WRITE:
perm = O_RDWR | O_CREAT;
break;
default:
return OS_FS_ERROR;
}
/*
** Translate the path
*/
if ( OS_TranslatePath(path, (char *)local_path) != OS_FS_SUCCESS )
{
return OS_FS_ERR_PATH_INVALID;
}
semTake(OS_FDTableMutex,WAIT_FOREVER);
for ( PossibleFD = 0; PossibleFD < OS_MAX_NUM_OPEN_FILES; PossibleFD++)
{
if( OS_FDTable[PossibleFD].IsValid == FALSE)
{
break;
}
}
if (PossibleFD >= OS_MAX_NUM_OPEN_FILES)
{
semGive(OS_FDTableMutex);
return OS_FS_ERR_NO_FREE_FDS;
}
/* Mark the table entry as valid so no other
* task can take that ID */
OS_FDTable[PossibleFD].IsValid = TRUE;
semGive(OS_FDTableMutex);
/* Open the file */
status = open(local_path, (int) perm, (int) mode);
semTake(OS_FDTableMutex,WAIT_FOREVER);
if (status != ERROR)
{
/* fill in the table before returning */
OS_FDTable[PossibleFD].OSfd = status;
strncpy(OS_FDTable[PossibleFD].Path, path, OS_MAX_PATH_LEN);
OS_FDTable[PossibleFD].User = OS_FindCreator();
semGive(OS_FDTableMutex);
return PossibleFD;
}
else
{ OS_FDTable[PossibleFD].IsValid = FALSE;
semGive(OS_FDTableMutex);
return OS_FS_ERROR;
}
} /* end OS_open */
int32 OS_open (const char *path, int32 access, uint32 mode)
{
int status;
rtems_status_code rtems_sc;
char local_path[OS_MAX_LOCAL_PATH_LEN];
int perm;
uint32 PossibleFD;
/*
** Check to see if the path pointer is NULL
*/
if (path == NULL)
{
return OS_FS_ERR_INVALID_POINTER;
}
/*
** Check to see if the path is too long
*/
if (strlen(path) >= OS_MAX_PATH_LEN)
{
return OS_FS_ERR_PATH_TOO_LONG;
}
/*
** check if the name of the file is too long
*/
if (OS_check_name_length(path) != OS_FS_SUCCESS)
{
return OS_FS_ERR_NAME_TOO_LONG;
}
/*
** Check for a valid access mode
*/
switch(access)
{
case OS_READ_ONLY:
perm = O_RDONLY;
break;
case OS_WRITE_ONLY:
perm = O_WRONLY;
break;
case OS_READ_WRITE:
perm = O_RDWR;
break;
default:
return OS_FS_ERROR;
}
/*
** Translate the path
*/
if ( OS_TranslatePath(path, (char *)local_path) != OS_FS_SUCCESS )
{
return OS_FS_ERR_PATH_INVALID;
}
rtems_sc = rtems_semaphore_obtain (OS_FDTableSem, RTEMS_WAIT, RTEMS_NO_TIMEOUT);
for ( PossibleFD = 0; PossibleFD < OS_MAX_NUM_OPEN_FILES; PossibleFD++)
{
if( OS_FDTable[PossibleFD].IsValid == FALSE)
{
break;
}
}
if (PossibleFD >= OS_MAX_NUM_OPEN_FILES)
{
rtems_sc = rtems_semaphore_release (OS_FDTableSem);
return OS_FS_ERR_NO_FREE_FDS;
}
/*
** Mark the table entry as valid so no other
** task can take that ID
*/
OS_FDTable[PossibleFD].IsValid = TRUE;
rtems_sc = rtems_semaphore_release (OS_FDTableSem);
/* open the file */
status = open(local_path, perm, mode);
if (status != ERROR)
{
rtems_sc = rtems_semaphore_obtain (OS_FDTableSem, RTEMS_WAIT, RTEMS_NO_TIMEOUT);
/* fill in the table before returning */
OS_FDTable[PossibleFD].OSfd = status;
strncpy(OS_FDTable[PossibleFD].Path, path, OS_MAX_PATH_LEN);
OS_FDTable[PossibleFD].User = OS_FindCreator();
rtems_sc = rtems_semaphore_release (OS_FDTableSem);
return PossibleFD;
}
else
{
rtems_sc = rtems_semaphore_obtain (OS_FDTableSem, RTEMS_WAIT, RTEMS_NO_TIMEOUT);
/* Operation failed, so reset to false */
OS_FDTable[PossibleFD].IsValid = FALSE;
rtems_sc = rtems_semaphore_release (OS_FDTableSem);
return OS_FS_ERROR;
}
} /* end OS_open */
/******************************************************************************
** Function: OS_TimerCreate
**
** Purpose: Create a new OSAL Timer
**
** Arguments:
**
** Return:
*/
int32 OS_TimerCreate(uint32 *timer_id, const char *timer_name,
uint32 *clock_accuracy, OS_TimerCallback_t callback_ptr)
{
rtems_status_code status;
rtems_name RtemsTimerName;
uint32 possible_tid;
int32 i;
if ( timer_id == NULL || timer_name == NULL)
{
return OS_INVALID_POINTER;
}
/*
** we don't want to allow names too long
** if truncated, two names might be the same
*/
if (strlen(timer_name) > OS_MAX_API_NAME)
{
return OS_ERR_NAME_TOO_LONG;
}
/*
** Check Parameters
*/
status = rtems_semaphore_obtain (OS_timer_table_sem, RTEMS_WAIT, RTEMS_NO_TIMEOUT);
for(possible_tid = 0; possible_tid < OS_MAX_TIMERS; possible_tid++)
{
if (OS_timer_table[possible_tid].free == TRUE)
break;
}
if( possible_tid >= OS_MAX_TIMERS || OS_timer_table[possible_tid].free != TRUE)
{
status = rtems_semaphore_release (OS_timer_table_sem);
return OS_ERR_NO_FREE_IDS;
}
/*
** Check to see if the name is already taken
*/
for (i = 0; i < OS_MAX_TIMERS; i++)
{
if ((OS_timer_table[i].free == FALSE) &&
strcmp ((char*) timer_name, OS_timer_table[i].name) == 0)
{
status = rtems_semaphore_release (OS_timer_table_sem);
return OS_ERR_NAME_TAKEN;
}
}
/*
** Verify callback parameter
*/
if (callback_ptr == NULL )
{
status = rtems_semaphore_release (OS_timer_table_sem);
return OS_TIMER_ERR_INVALID_ARGS;
}
/*
** Set the possible timer Id to not free so that
** no other task can try to use it
*/
OS_timer_table[possible_tid].free = FALSE;
status = rtems_semaphore_release (OS_timer_table_sem);
OS_timer_table[possible_tid].creator = OS_FindCreator();
OS_timer_table[possible_tid].start_time = 0;
OS_timer_table[possible_tid].interval_time = 0;
OS_timer_table[possible_tid].callback_ptr = callback_ptr;
/*
** Create an interval timer
*/
RtemsTimerName = rtems_build_name('T','M','E','R');
status = rtems_timer_create(RtemsTimerName, &(OS_timer_table[possible_tid].host_timerid));
if ( status != RTEMS_SUCCESSFUL )
{
OS_timer_table[possible_tid].free = TRUE;
return(OS_TIMER_ERR_UNAVAILABLE);
}
/*
** Return the clock accuracy to the user
*/
*clock_accuracy = os_clock_accuracy;
/*
** Return timer ID
*/
*timer_id = possible_tid;
return OS_SUCCESS;
}
int32 OS_creat (const char *path, int32 access)
{
int status;
char local_path[OS_MAX_LOCAL_PATH_LEN];
int perm;
mode_t mode;
uint32 PossibleFD;
/*
** Check to see if the path pointer is NULL
*/
if (path == NULL)
{
return OS_FS_ERR_INVALID_POINTER;
}
/*
** Check to see if the path is too long
*/
if (strlen(path) >= OS_MAX_PATH_LEN)
{
return OS_FS_ERR_PATH_TOO_LONG;
}
/*
** check if the name of the file is too long
*/
if (OS_check_name_length(path) != OS_FS_SUCCESS)
{
return OS_FS_ERR_NAME_TOO_LONG;
}
/*
** Check for a valid access mode
** For creating a file, OS_READ_ONLY does not make sense
*/
switch(access)
{
case OS_WRITE_ONLY:
perm = O_WRONLY;
break;
case OS_READ_WRITE:
perm = O_RDWR;
break;
default:
return OS_FS_ERROR;
}
/*
** Translate the path
*/
if ( OS_TranslatePath(path, (char *)local_path) != OS_FS_SUCCESS )
{
return OS_FS_ERR_PATH_INVALID;
}
pthread_mutex_lock(&OS_FDTableMutex);
for ( PossibleFD = 0; PossibleFD < OS_MAX_NUM_OPEN_FILES; PossibleFD++)
{
if( OS_FDTable[PossibleFD].IsValid == FALSE)
{
break;
}
}
if (PossibleFD >= OS_MAX_NUM_OPEN_FILES)
{
pthread_mutex_unlock(&OS_FDTableMutex);
return OS_FS_ERR_NO_FREE_FDS;
}
/* Mark the table entry as valid so no other
* task can take that ID */
OS_FDTable[PossibleFD].IsValid = TRUE;
pthread_mutex_unlock(&OS_FDTableMutex);
mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
status = open(local_path, perm | O_CREAT | O_TRUNC, mode);
pthread_mutex_lock(&OS_FDTableMutex);
if (status != ERROR)
{
/* fill in the table before returning */
OS_FDTable[PossibleFD].OSfd = status;
strncpy(OS_FDTable[PossibleFD].Path, path, OS_MAX_PATH_LEN);
OS_FDTable[PossibleFD].User = OS_FindCreator();
pthread_mutex_unlock(&OS_FDTableMutex);
return PossibleFD;
}
else
{
/* Operation failed, so reset to false */
OS_FDTable[PossibleFD].IsValid = FALSE;
pthread_mutex_unlock(&OS_FDTableMutex);
return OS_FS_ERROR;
}
} /* end OS_creat */
int32 OS_open (const char *path, int32 access, uint32 mode)
{
int status;
char local_path[OS_MAX_PATH_LEN];
int perm;
uint32 PossibleFD;
if(path == NULL)
return OS_FS_ERR_INVALID_POINTER;
if (strlen(path) >= OS_MAX_PATH_LEN)
return OS_FS_ERR_PATH_TOO_LONG;
/* make a local copy of the path */
strcpy(local_path, path);
if(OS_NameChange(local_path) != OS_FS_SUCCESS)
{
return OS_FS_ERR_PATH_INVALID;
}
/* check if the name of the file is too long */
if (OS_check_name_length(local_path) == OS_FS_ERROR)
return OS_FS_ERR_NAME_TOO_LONG;
pthread_mutex_lock(&OS_FDTableMutex);
for ( PossibleFD = 0; PossibleFD < OS_MAX_NUM_OPEN_FILES; PossibleFD++)
{
if( OS_FDTable[PossibleFD].IsValid == FALSE)
{
break;
}
}
if (PossibleFD >= OS_MAX_NUM_OPEN_FILES)
{
pthread_mutex_unlock(&OS_FDTableMutex);
return OS_FS_ERR_NO_FREE_FDS;
}
/* Mark the table entry as valid so no other
* task can take that ID */
OS_FDTable[PossibleFD].IsValid = TRUE;
pthread_mutex_unlock(&OS_FDTableMutex);
switch(access)
{
case OS_READ_ONLY:
perm = O_RDONLY;
break;
case OS_WRITE_ONLY:
perm = O_WRONLY;
break;
case OS_READ_WRITE:
perm = O_RDWR;
break;
default:
return OS_FS_ERROR;
}
/* open the file with the R/W permissions */
status = open(local_path,perm);
pthread_mutex_lock(&OS_FDTableMutex);
if (status != ERROR)
{
/* fill in the table before returning */
OS_FDTable[PossibleFD].OSfd = status;
strncpy(OS_FDTable[PossibleFD].Path, path, OS_MAX_API_NAME);
OS_FDTable[PossibleFD].User = OS_FindCreator();
pthread_mutex_unlock(&OS_FDTableMutex);
return PossibleFD;
}
else
{
/* Operation failed, so reset to false */
OS_FDTable[PossibleFD].IsValid = FALSE;
pthread_mutex_unlock(&OS_FDTableMutex);
return OS_FS_ERROR;
}
} /* end OS_open */
/******************************************************************************
** Function: OS_TimerCreate
**
** Purpose: Create a new OSAL Timer
**
** Arguments:
**
** Return:
*/
int32 OS_TimerCreate(uint32 *timer_id, const char *timer_name, uint32 *clock_accuracy, OS_TimerCallback_t callback_ptr)
{
uint32 possible_tid;
int32 i;
int status;
if ( timer_id == NULL || timer_name == NULL || clock_accuracy == NULL )
{
return OS_INVALID_POINTER;
}
/*
** we don't want to allow names too long
** if truncated, two names might be the same
*/
if (strlen(timer_name) > OS_MAX_API_NAME)
{
return OS_ERR_NAME_TOO_LONG;
}
/*
** Check Parameters
*/
semTake(OS_timer_table_sem,WAIT_FOREVER);
for(possible_tid = 0; possible_tid < OS_MAX_TIMERS; possible_tid++)
{
if (OS_timer_table[possible_tid].free == TRUE)
break;
}
if( possible_tid >= OS_MAX_TIMERS || OS_timer_table[possible_tid].free != TRUE)
{
semGive(OS_timer_table_sem);
return OS_ERR_NO_FREE_IDS;
}
/*
** Check to see if the name is already taken
*/
for (i = 0; i < OS_MAX_TIMERS; i++)
{
if ((OS_timer_table[i].free == FALSE) &&
strcmp ((char*) timer_name, OS_timer_table[i].name) == 0)
{
semGive(OS_timer_table_sem);
return OS_ERR_NAME_TAKEN;
}
}
/*
** Verify callback parameter
*/
if (callback_ptr == NULL )
{
semGive(OS_timer_table_sem);
return OS_TIMER_ERR_INVALID_ARGS;
}
/*
** Set the possible timer Id to not free so that
** no other task can try to use it
*/
OS_timer_table[possible_tid].free = FALSE;
semGive(OS_timer_table_sem);
OS_timer_table[possible_tid].creator = OS_FindCreator();
strncpy(OS_timer_table[possible_tid].name, timer_name, OS_MAX_API_NAME);
OS_timer_table[possible_tid].start_time = 0;
OS_timer_table[possible_tid].interval_time = 0;
OS_timer_table[possible_tid].callback_ptr = callback_ptr;
/*
** Create the timer
*/
status = timer_create(CLOCK_REALTIME, NULL, (timer_t *)&(OS_timer_table[possible_tid].host_timerid));
if (status < 0)
{
OS_timer_table[possible_tid].free = TRUE;
return ( OS_TIMER_ERR_UNAVAILABLE);
}
/*
** Connect the timer to the callback function. This is non-posix, but it make the timer
** setup easier.
*/
status = timer_connect((timer_t)(OS_timer_table[possible_tid].host_timerid), OS_TimerSignalHandler, possible_tid );
if (status < 0 )
{
status = timer_delete((timer_t)(OS_timer_table[possible_tid].host_timerid));
return(OS_TIMER_ERR_UNAVAILABLE);
}
/*
** Return the clock accuracy to the user
*/
*clock_accuracy = os_clock_accuracy;
/*
** Return timer ID
*/
*timer_id = possible_tid;
return OS_SUCCESS;
}