typedef struct _IOFileObject {
int fd;
void* buf;
-
- int bufStart; /* offset of start of data waiting to
- be written. This may be non-zero in
- the case where we wrote out some of the
- buffer, and then blocked.
-
- NOTE: this field should be non-zero *only*
- when we just blocked on a call to writeBuffer,
- and we're going to restart the call when
- we unblock. It should be zero at all other
- times.
- */
-
int bufWPtr; /* points to next position to write,
bufRPtr >= bufWPtr <= bufSize.