1*19c3b8c2SApple OSS Distributions<h2>device_write_async_inband</h2> 2*19c3b8c2SApple OSS Distributions<hr> 3*19c3b8c2SApple OSS Distributions<p> 4*19c3b8c2SApple OSS Distributions<strong>System Trap</strong> - Write a sequence of bytes "inband" to a device object. 5*19c3b8c2SApple OSS Distributions<h3>SYNOPSIS</h3> 6*19c3b8c2SApple OSS Distributions<pre> 7*19c3b8c2SApple OSS Distributions<strong>kern_return_t device_write_async_inband</strong> 8*19c3b8c2SApple OSS Distributions <strong>(mach_port_t</strong> <var>device</var>, 9*19c3b8c2SApple OSS Distributions <strong>mach_port_t</strong> <var>queue</var>, 10*19c3b8c2SApple OSS Distributions <strong>mach_port_t</strong> <var>request_id</var>, 11*19c3b8c2SApple OSS Distributions <strong>dev_mode_t</strong> <var>mode</var>, 12*19c3b8c2SApple OSS Distributions <strong>recnum_t</strong> <var>recnum</var>, 13*19c3b8c2SApple OSS Distributions <strong>io_buf_ptr_t</strong> <var>data</var>, 14*19c3b8c2SApple OSS Distributions <strong>io_buf_len_t</strong> <var>bytes_wanted</var><strong>);</strong> 15*19c3b8c2SApple OSS Distributions</pre> 16*19c3b8c2SApple OSS Distributions<h3>PARAMETERS</h3> 17*19c3b8c2SApple OSS Distributions<dl> 18*19c3b8c2SApple OSS Distributions<p> 19*19c3b8c2SApple OSS Distributions<dt> <var>device</var> 20*19c3b8c2SApple OSS Distributions<dd> 21*19c3b8c2SApple OSS Distributions[in device send right] A device port to the device to be read. 22*19c3b8c2SApple OSS Distributions<p> 23*19c3b8c2SApple OSS Distributions<dt> <var>queue</var> 24*19c3b8c2SApple OSS Distributions<dd> 25*19c3b8c2SApple OSS Distributions[in io_done queue send right] The port returned from 26*19c3b8c2SApple OSS Distributionsio_done_queue_create. 27*19c3b8c2SApple OSS Distributions<p> 28*19c3b8c2SApple OSS Distributions<dt> <var>request_id</var> 29*19c3b8c2SApple OSS Distributions<dd> 30*19c3b8c2SApple OSS Distributions[in send right] An unique request identifier that will be passed back as 31*19c3b8c2SApple OSS Distributionspart of the io_done_result structure. 32*19c3b8c2SApple OSS Distributions<p> 33*19c3b8c2SApple OSS Distributions<dt> <var>mode</var> 34*19c3b8c2SApple OSS Distributions<dd> 35*19c3b8c2SApple OSS Distributions[in scalar] I/O mode value. Meaningful options are: 36*19c3b8c2SApple OSS Distributions<p> 37*19c3b8c2SApple OSS Distributions <dl> 38*19c3b8c2SApple OSS Distributions<dt> <strong>D_NOWAIT</strong> 39*19c3b8c2SApple OSS Distributions<dd> 40*19c3b8c2SApple OSS DistributionsDo not wait if data is unavailable. 41*19c3b8c2SApple OSS Distributions </dl> 42*19c3b8c2SApple OSS Distributions<p> 43*19c3b8c2SApple OSS Distributions<dt> <var>recnum</var> 44*19c3b8c2SApple OSS Distributions<dd> 45*19c3b8c2SApple OSS Distributions[in scalar] Record number to be read. 46*19c3b8c2SApple OSS Distributions<p> 47*19c3b8c2SApple OSS Distributions<dt> <var>data</var> 48*19c3b8c2SApple OSS Distributions<dd> 49*19c3b8c2SApple OSS Distributions[pointer to in array of bytes] Data bytes to be written. 50*19c3b8c2SApple OSS Distributions<p> 51*19c3b8c2SApple OSS Distributions<dt> <var>bytes_wanted</var> 52*19c3b8c2SApple OSS Distributions<dd> 53*19c3b8c2SApple OSS Distributions[in scalar] Size of data transfer. 54*19c3b8c2SApple OSS Distributions</dl> 55*19c3b8c2SApple OSS Distributions<h3>DESCRIPTION</h3> 56*19c3b8c2SApple OSS Distributions<p> 57*19c3b8c2SApple OSS DistributionsThe <strong>device_write_async_inband</strong> function enqueues a write operation for 58*19c3b8c2SApple OSS Distributionsa sequence of bytes to a device object. The meaning of recnum as 59*19c3b8c2SApple OSS Distributionswell as the specific operation performed is device dependent. This 60*19c3b8c2SApple OSS Distributionscall differs from <strong>device_write_async</strong> in that the bytes to be written 61*19c3b8c2SApple OSS Distributionsare sent "inband" in the request IPC message. 62*19c3b8c2SApple OSS Distributions<h3>RETURN VALUES</h3> 63*19c3b8c2SApple OSS Distributions<p> 64*19c3b8c2SApple OSS Distributions<strong>device_write_async_inband</strong> returns only invalid parameter errors. 65*19c3b8c2SApple OSS Distributions<h3>RELATED INFORMATION</h3> 66*19c3b8c2SApple OSS Distributions<p> 67*19c3b8c2SApple OSS DistributionsFunctions: 68*19c3b8c2SApple OSS Distributions<a href="device_read_async_inband.html"><strong>device_read_async_inband</strong></a>, 69*19c3b8c2SApple OSS Distributions<a href="DR_overwrite_async.html"><strong>device_read_overwrite_async</strong></a>, 70*19c3b8c2SApple OSS Distributions<a href="device_write_async.html"><strong>device_write_async</strong></a>, 71*19c3b8c2SApple OSS Distributions<a href="io_done_queue_create.html"><strong>io_done_queue_create</strong></a>. 72