C++ (Cpp) sig_read_data Examples

Example #1

File: visorchannel.c Project: SantoshShilimkar/linux

static int signalremove_inner(struct visorchannel *channel, u32 queue,
			      void *msg)
{
	struct signal_queue_header sig_hdr;
	int error;

	error = sig_read_header(channel, queue, &sig_hdr);
	if (error)
		return error;
	/* No signals to remove; have caller try again. */
	if (sig_hdr.head == sig_hdr.tail)
		return -EAGAIN;
	sig_hdr.tail = (sig_hdr.tail + 1) % sig_hdr.max_slots;
	error = sig_read_data(channel, queue, &sig_hdr, sig_hdr.tail, msg);
	if (error)
		return error;
	sig_hdr.num_received++;
	/*
	 * For each data field in SIGNAL_QUEUE_HEADER that was modified, update
	 * host memory. Required for channel sync.
	 */
	mb();
	error = SIG_WRITE_FIELD(channel, queue, &sig_hdr, tail);
	if (error)
		return error;
	error = SIG_WRITE_FIELD(channel, queue, &sig_hdr, num_received);
	if (error)
		return error;
	return 0;
}

Example #2

File: visorchannel_funcs.c Project: Abioy/kasan

static BOOL
signalremove_inner(struct visorchannel *channel, u32 queue, void *msg)
{
	struct signal_queue_header sig_hdr;

	if (!sig_read_header(channel, queue, &sig_hdr)) {
		return FALSE;
	}
	if (sig_hdr.head == sig_hdr.tail)
		return FALSE;	/* no signals to remove */

	sig_hdr.tail = (sig_hdr.tail + 1) % sig_hdr.max_slots;
	if (!sig_read_data(channel, queue, &sig_hdr, sig_hdr.tail, msg)) {
		ERRDRV("sig_read_data failed\n");
		return FALSE;
	}
	sig_hdr.num_received++;

	/* For each data field in SIGNAL_QUEUE_HEADER that was modified,
	 * update host memory.
	 */
	mb(); /* required for channel synch */
	if (!SIG_WRITE_FIELD(channel, queue, &sig_hdr, tail)) {
		ERRDRV("visor_memregion_write of Tail failed\n");
		return FALSE;
	}
	if (!SIG_WRITE_FIELD(channel, queue, &sig_hdr, num_received)) {
		ERRDRV("visor_memregion_write of NumSignalsReceived failed\n");
		return FALSE;
	}
	return TRUE;
}

Example #3

File: visorchannel_funcs.c Project: 383530895/linux

BOOL
visorchannel_signalremove(VISORCHANNEL *channel, u32 queue, void *msg)
{
	BOOL rc = FALSE;
	struct signal_queue_header sig_hdr;

	if (channel->needs_lock)
		spin_lock(&channel->remove_lock);

	if (!sig_read_header(channel, queue, &sig_hdr)) {
		rc = FALSE;
		goto cleanup;
	}
	if (sig_hdr.head == sig_hdr.tail) {
		rc = FALSE;	/* no signals to remove */
		goto cleanup;
	}
	sig_hdr.tail = (sig_hdr.tail + 1) % sig_hdr.max_slots;
	if (!sig_read_data(channel, queue, &sig_hdr, sig_hdr.tail, msg)) {
		ERRDRV("sig_read_data failed: (status=%d)\n", rc);
		goto cleanup;
	}
	sig_hdr.num_received++;

	/* For each data field in SIGNAL_QUEUE_HEADER that was modified,
	 * update host memory.
	 */
	mb(); /* required for channel synch */
	if (!SIG_WRITE_FIELD(channel, queue, &sig_hdr, tail)) {
		ERRDRV("visor_memregion_write of Tail failed: (status=%d)\n",
		       rc);
		goto cleanup;
	}
	if (!SIG_WRITE_FIELD(channel, queue, &sig_hdr, num_received)) {
		ERRDRV("visor_memregion_write of NumSignalsReceived failed: (status=%d)\n",
		       rc);
		goto cleanup;
	}
	rc = TRUE;
cleanup:
	if (channel->needs_lock)
		spin_unlock(&channel->remove_lock);

	return rc;
}

Example #4

File: visorchannel_funcs.c Project: MaxChina/linux

BOOL
visorchannel_signalremove(VISORCHANNEL *channel, U32 queue, void *msg)
{
	BOOL rc = FALSE;
	SIGNAL_QUEUE_HEADER sig_hdr;

	if (channel->needs_lock)
		spin_lock(&channel->remove_lock);

	if (!sig_read_header(channel, queue, &sig_hdr)) {
		rc = FALSE;
		goto Away;
	}
	if (sig_hdr.Head == sig_hdr.Tail) {
		rc = FALSE;	/* no signals to remove */
		goto Away;
	}
	sig_hdr.Tail = (sig_hdr.Tail + 1) % sig_hdr.MaxSignalSlots;
	if (!sig_read_data(channel, queue, &sig_hdr, sig_hdr.Tail, msg)) {
		ERRDRV("sig_read_data failed: (status=%d)\n", rc);
		goto Away;
	}
	sig_hdr.NumSignalsReceived++;

	/* For each data field in SIGNAL_QUEUE_HEADER that was modified,
	 * update host memory.
	 */
	MEMORYBARRIER;
	if (!SIG_WRITE_FIELD(channel, queue, &sig_hdr, Tail)) {
		ERRDRV("visor_memregion_write of Tail failed: (status=%d)\n",
		       rc);
		goto Away;
	}
	if (!SIG_WRITE_FIELD(channel, queue, &sig_hdr, NumSignalsReceived)) {
		ERRDRV("visor_memregion_write of NumSignalsReceived failed: (status=%d)\n", rc);
		goto Away;
	}
	rc = TRUE;
Away:
	if (channel->needs_lock)
		spin_unlock(&channel->remove_lock);

	return rc;
}