C++ (Cpp) DCONS_NEXT_GENの例

コード例 #1

ファイル: dcons.c プロジェクト: 2asoft/freebsd

int
dcons_ischar(struct dcons_softc *dc)
{
	u_int32_t ptr, pos, gen, next_gen;
	struct dcons_ch *ch;

	ch = &dc->i;

	ptr = ntohl(*ch->ptr);
	gen = ptr >> DCONS_GEN_SHIFT;
	pos = ptr & DCONS_POS_MASK;
	if (gen == ch->gen && pos == ch->pos)
		return (0);

	next_gen = DCONS_NEXT_GEN(ch->gen);
	/* XXX sanity check */
	if ((gen != ch->gen && gen != next_gen)
			|| (gen == ch->gen && pos < ch->pos)) {
		/* generation skipped !! */
		/* XXX discard */
		ch->gen = gen;
		ch->pos = pos;
		return (0);
	}

	return (1);
}

コード例 #2

ファイル: dcons.c プロジェクト: 2asoft/freebsd

int
dcons_checkc(struct dcons_softc *dc)
{
	unsigned char c;
	u_int32_t ptr, pos, gen, next_gen;
	struct dcons_ch *ch;

	ch = &dc->i;

	ptr = ntohl(*ch->ptr);
	gen = ptr >> DCONS_GEN_SHIFT;
	pos = ptr & DCONS_POS_MASK;
	if (gen == ch->gen && pos == ch->pos)
		return (-1);

	next_gen = DCONS_NEXT_GEN(ch->gen);
	/* XXX sanity check */
	if ((gen != ch->gen && gen != next_gen)
			|| (gen == ch->gen && pos < ch->pos)) {
		/* generation skipped !! */
		/* XXX discard */
		ch->gen = gen;
		ch->pos = pos;
		return (-1);
	}

	c = ch->buf[ch->pos];
	ch->pos ++;
	if (ch->pos >= ch->size) {
		ch->gen = next_gen;
		ch->pos = 0;
	}

	return (c);
}

コード例 #3

ファイル: dcons.c プロジェクト: UnitedMarsupials/kame

static int
dcons_checkc(struct dcons_softc *dc)
{
	unsigned char c;
	u_int32_t ptr, pos, gen, next_gen;
	struct dcons_ch *ch;

	ch = &dc->i;

	if (dcons_dma_tag != NULL)
		bus_dmamap_sync(dcons_dma_tag, dcons_dma_map,
						BUS_DMASYNC_POSTREAD);
	ptr = ntohl(*ch->ptr);
	gen = ptr >> DCONS_GEN_SHIFT;
	pos = ptr & DCONS_POS_MASK;
	if (gen == ch->gen && pos == ch->pos)
		return (-1);

	next_gen = DCONS_NEXT_GEN(ch->gen);
	/* XXX sanity check */
	if ((gen != ch->gen && gen != next_gen)
			|| (gen == ch->gen && pos < ch->pos)) {
		/* generation skipped !! */
		/* XXX discard */
		ch->gen = gen;
		ch->pos = pos;
		return (-1);
	}

	c = ch->buf[ch->pos];
	ch->pos ++;
	if (ch->pos >= ch->size) {
		ch->gen = next_gen;
		ch->pos = 0;
	}

#if DDB && ALT_BREAK_TO_DEBUGGER
	switch (dc->brk_state) {
	case STATE1:
		if (c == KEY_TILDE)
			dc->brk_state = STATE2;
		else
			dc->brk_state = STATE0;
		break;
	case STATE2:
		dc->brk_state = STATE0;
		if (c == KEY_CTRLB) {
#if DCONS_FORCE_GDB
			if (dc->flags & DC_GDB)
				boothowto |= RB_GDB;
#endif
			breakpoint();
		}
	}
	if (c == KEY_CR)
		dc->brk_state = STATE1;
#endif
	return (c);
}

コード例 #4

ファイル: dcons.c プロジェクト: 2asoft/freebsd

void
dcons_putc(struct dcons_softc *dc, int c)
{
	struct dcons_ch *ch;

	ch = &dc->o;

	ch->buf[ch->pos] = c;
	ch->pos ++;
	if (ch->pos >= ch->size) {
		ch->gen = DCONS_NEXT_GEN(ch->gen);
		ch->pos = 0;
	}
	*ch->ptr = DCONS_MAKE_PTR(ch);
}

コード例 #5

ファイル: dcons.c プロジェクト: UnitedMarsupials/kame

static void
dcons_putc(struct dcons_softc *dc, int c)
{
	struct dcons_ch *ch;

	ch = &dc->o;

	ch->buf[ch->pos] = c;
	ch->pos ++;
	if (ch->pos >= ch->size) {
		ch->gen = DCONS_NEXT_GEN(ch->gen);
		ch->pos = 0;
	}
	*ch->ptr = DCONS_MAKE_PTR(ch);
	if (dcons_dma_tag != NULL)
		bus_dmamap_sync(dcons_dma_tag, dcons_dma_map,
						BUS_DMASYNC_PREWRITE);
}