/* Store one log message of give size */
int LogMessage(uint8_t level, char* buf, uint32_t size){
if(size < LOG_BUFFER_SIZE - sizeof(mTail)){
uint32_t buffpos;
uint64_t new_cursor, old_cursor;
mTail tail;
tail.msgsize = size;
tail.tick = __tick;
PLC_GetTime(&tail.time);
/* We cannot increment both msg index and string pointer
in a single atomic operation but we can detect having been interrupted.
So we can try with atomic compare and swap in a loop until operation
succeeds non interrupted */
do{
old_cursor = LogCursor[level];
buffpos = (uint32_t)old_cursor;
tail.msgidx = (old_cursor >> 32);
new_cursor = ((uint64_t)(tail.msgidx + 1)<<32)
| (uint64_t)((buffpos + size + sizeof(mTail)) & LOG_BUFFER_MASK);
}while(AtomicCompareExchange64(
(long long*)&LogCursor[level],
(long long)old_cursor,
(long long)new_cursor)!=(long long)old_cursor);
copy_to_log(level, buffpos, buf, size);
copy_to_log(level, (buffpos + size) & LOG_BUFFER_MASK, &tail, sizeof(mTail));
return 1; /* Success */
}else{
void PLC_task_proc(void *arg)
{
PLC_SetTimer(common_ticktime__, common_ticktime__);
while (!PLC_shutdown) {
PLC_GetTime(&__CURRENT_TIME);
__run();
if (PLC_shutdown) break;
rt_task_wait_period(NULL);
}
}
void runPLC(void)
{
PLC_GetTime( &__CURRENT_TIME );
__run();
}
