static ssize_t rb_read(CwtRingBuffer *rb, CwtByteArray *ba, size_t n)
{
ssize_t br = rb_peek(rb, ba, n);
if( br > 0 )
rb_pop_front(rb, br);
return br;
}
int UARTClass::peek( void )
{
return rb_peek(_dev->rb);
}
//=============================================================================
int main(int argc, char *argv[])
{
if(argc<2)
{
fprintf(stderr,"need number\n");
exit(1);
}
int rb_size_request=atoi(argv[1]);
fprintf(stderr,"\n==creating new ringbuffer of size %d\n",rb_size_request);
rb_t *rb=rb_new(rb_size_request);
if(rb==NULL)
{
fprintf(stderr,"ringbuffer with size 0?\n");
exit(1);
}
rb_debug(rb);
fprintf(stderr,"\n==write full + 1\n");
int i;
for(i=0;i<rb_size_request+1;i++)
{
char put[1]={i};
int wrote=rb_write(rb,put,1);
rb_debug(rb);
}
fprintf(stderr,"\n==peek full + 1\n");
char pull[rb_size_request];
int peeked=rb_peek(rb,pull,rb_size_request+1);
rb_debug(rb);
fprintf(stderr,"\n==read full + 1\n");
for(i=0;i<rb_size_request+1;i++)
{
char pull[1];
int read=rb_read(rb,pull,1);
rb_debug(rb);
}
fprintf(stderr,"\n==write full\n");
for(i=0;i<rb_size_request;i++)
{
char put[1]={i};
int wrote=rb_write(rb,put,1);
rb_debug(rb);
}
rb_print_regions(rb);
fprintf(stderr,"\n==advance read pointer 1\n");
rb_advance_read_index(rb,1);
rb_debug(rb);
fprintf(stderr,"\n==drop\n");
rb_drop(rb);
rb_debug(rb);
rb_print_regions(rb);
fprintf(stderr,"\n==write 1\n");
char put[1]={'a'};
int wrote=rb_write(rb,put,1);
rb_debug(rb);
rb_print_regions(rb);
fprintf(stderr,"\n==read 1\n");
char put2[1];
int read=rb_read(rb,put2,1);
rb_debug(rb);
rb_print_regions(rb);
fprintf(stderr,"\n==write 4\n");
char put3[4]={'a','b','c','d'};
wrote=rb_write(rb,put3,4);
rb_debug(rb);
rb_print_regions(rb);
int advanced;
int k;
for(k=0;k<20;k++)
{
fprintf(stderr,"\n==advance write 3\n");
advanced=rb_advance_write_index(rb,3);
rb_debug(rb);
rb_print_regions(rb);
fprintf(stderr,"\n==advance read 2\n");
advanced=rb_advance_read_index(rb,2);
rb_debug(rb);
rb_print_regions(rb);
}
for(k=0;k<20;k++)
{
fprintf(stderr,"\n==advance read 3\n");
advanced=rb_advance_read_index(rb,2);
rb_debug(rb);
rb_print_regions(rb);
fprintf(stderr,"\n==advance write 2\n");
advanced=rb_advance_write_index(rb,3);
rb_debug(rb);
rb_print_regions(rb);
}
rb_region_t d;
rb_get_next_write_region(rb,&d);
fprintf(stderr,"\n==got next write buffer, can write %" PRId64 "\n",d.size);
fprintf(stderr,"\n==drop\n");
rb_drop(rb);
rb_debug(rb);
rb_print_regions(rb);
rb_get_next_write_region(rb,&d);
fprintf(stderr,"\n==got next write buffer, can write %" PRId64 "\n",d.size);
d.buffer[0]='x';
fprintf(stderr,"\n==advance write 4\n");
advanced=rb_advance_write_index(rb,4);
rb_debug(rb);
rb_print_regions(rb);
rb_get_next_read_region(rb,&d);
fprintf(stderr,"\n==got next read buffer, can read %" PRId64 "\n",d.size);
fprintf(stderr,"\n==advance read 4\n");
rb_advance_read_index(rb,4);
rb_debug(rb);
rb_print_regions(rb);
rb_get_next_read_region(rb,&d);
fprintf(stderr,"\n==got next read buffer, can read %" PRId64 "\n",d.size);
d.buffer[0]='x';
fprintf(stderr,"\n==advance read 1\n");
advanced=rb_advance_read_index(rb,1);
rb_debug(rb);
rb_print_regions(rb);
fprintf(stderr,"\n==reset\n");
rb_reset(rb);
rb_debug(rb);
fprintf(stderr,"\n==free\n");
rb_free(rb);
rb_debug(rb);
return 0;
}//end main
