60 lines
1.1 KiB
C
60 lines
1.1 KiB
C
|
#include <mango/status.h>
|
||
|
|
#include <xpc/buffer.h>
|
||
|
|
#include <xpc/msg.h>
|
||
|
|
|
||
|
|
kern_status_t xpc_buffer_read(
|
||
|
|
const xpc_buffer_t *buf,
|
||
|
|
void *out,
|
||
|
|
size_t max,
|
||
|
|
size_t *nr_read)
|
||
|
|
{
|
||
|
|
if ((buf->buf_flags & (XPC_BUFFER_F_IN | XPC_BUFFER_F_REMOTE))
|
||
|
|
!= (XPC_BUFFER_F_IN | XPC_BUFFER_F_REMOTE)) {
|
||
|
|
return KERN_BAD_STATE;
|
||
|
|
}
|
||
|
|
|
||
|
|
size_t to_read = max;
|
||
|
|
if (to_read > buf->buf_len) {
|
||
|
|
to_read = buf->buf_len;
|
||
|
|
}
|
||
|
|
|
||
|
|
kern_status_t status
|
||
|
|
= xpc_msg_read(buf->buf_origin, buf->buf_offset, out, to_read);
|
||
|
|
if (status != KERN_OK) {
|
||
|
|
return status;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* TODO */
|
||
|
|
*nr_read = to_read;
|
||
|
|
|
||
|
|
return KERN_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
kern_status_t xpc_buffer_write(
|
||
|
|
xpc_buffer_t *buf,
|
||
|
|
const void *in,
|
||
|
|
size_t len,
|
||
|
|
size_t *nr_written)
|
||
|
|
{
|
||
|
|
if ((buf->buf_flags & (XPC_BUFFER_F_OUT | XPC_BUFFER_F_REMOTE))
|
||
|
|
!= (XPC_BUFFER_F_OUT | XPC_BUFFER_F_REMOTE)) {
|
||
|
|
return KERN_BAD_STATE;
|
||
|
|
}
|
||
|
|
|
||
|
|
size_t to_write = len;
|
||
|
|
if (to_write > buf->buf_max) {
|
||
|
|
to_write = buf->buf_max;
|
||
|
|
}
|
||
|
|
|
||
|
|
kern_status_t status
|
||
|
|
= xpc_msg_write(buf->buf_origin, buf->buf_offset, in, to_write);
|
||
|
|
if (status != KERN_OK) {
|
||
|
|
return status;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* TODO */
|
||
|
|
*nr_written = to_write;
|
||
|
|
|
||
|
|
return KERN_OK;
|
||
|
|
}
|