#include <gr_buffer.h>
Public Member Functions | |
virtual | ~gr_buffer () |
int | space_available () const |
return number of items worth of space available for writing | |
void * | write_pointer () |
return pointer to write buffer. | |
void | update_write_pointer (int nitems) |
tell buffer that we wrote nitems into it | |
void | set_done (bool done) |
bool | done () const |
Protected Attributes | |
char * | d_base |
unsigned int | d_bufsize |
Friends | |
class | gr_buffer_reader |
gr_buffer_sptr | gr_make_buffer (int nitems, size_t sizeof_item) |
Allocate a buffer that holds at least nitems of size sizeof_item . | |
gr_buffer_reader_sptr | gr_buffer_add_reader (gr_buffer_sptr buf, int nzero_preload) |
create a new gr_buffer_reader and attach it to buffer buf |
virtual gr_buffer::~gr_buffer | ( | ) | [virtual] |
bool gr_buffer::done | ( | ) | const [inline] |
void gr_buffer::set_done | ( | bool | done | ) | [inline] |
int gr_buffer::space_available | ( | ) | const |
return number of items worth of space available for writing
void gr_buffer::update_write_pointer | ( | int | nitems | ) |
tell buffer that we wrote nitems
into it
void* gr_buffer::write_pointer | ( | ) |
return pointer to write buffer.
The return value points at space that can hold at least space_available() items.
gr_buffer_reader_sptr gr_buffer_add_reader | ( | gr_buffer_sptr | buf, | |
int | nzero_preload | |||
) | [friend] |
create a new gr_buffer_reader and attach it to buffer buf
nzero_preload | -- number of zero items to "preload" into buffer. |
friend class gr_buffer_reader [friend] |
gr_buffer_sptr gr_make_buffer | ( | int | nitems, | |
size_t | sizeof_item | |||
) | [friend] |
Allocate a buffer that holds at least nitems
of size sizeof_item
.
The total size of the buffer will be rounded up to a system dependent boundary. This is typically the system page size, but under MS windows is 64KB.
char* gr_buffer::d_base [protected] |
unsigned int gr_buffer::d_bufsize [protected] |