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Wed, 11 Sep 2024 05:18:32 -0700 (PDT) From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Cc: Mark Cave-Ayland , Alistair Francis , Octavian Purdila , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Subject: [PULL 34/56] fifo8: add skip parameter to fifo8_peekpop_bufptr() Date: Wed, 11 Sep 2024 14:13:59 +0200 Message-ID: <20240911121422.52585-35-philmd@linaro.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240911121422.52585-1-philmd@linaro.org> References: <20240911121422.52585-1-philmd@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::334; envelope-from=philmd@linaro.org; helo=mail-wm1-x334.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1726057799840116600 From: Mark Cave-Ayland The skip parameter specifies the number of bytes to be skipped from the current FIFO head before the peek or pop operation. Signed-off-by: Mark Cave-Ayland Reviewed-by: Alistair Francis Reviewed-by: Octavian Purdila Reviewed-by: Philippe Mathieu-Daud=C3=A9 Tested-by: Philippe Mathieu-Daud=C3=A9 Message-ID: <20240828122258.928947-4-mark.cave-ayland@ilande.co.uk> Signed-off-by: Philippe Mathieu-Daud=C3=A9 --- util/fifo8.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/util/fifo8.c b/util/fifo8.c index 5faa814a6e..62d6430b05 100644 --- a/util/fifo8.c +++ b/util/fifo8.c @@ -72,18 +72,20 @@ uint8_t fifo8_pop(Fifo8 *fifo) } =20 static const uint8_t *fifo8_peekpop_bufptr(Fifo8 *fifo, uint32_t max, - uint32_t *numptr, bool do_pop) + uint32_t skip, uint32_t *numptr, + bool do_pop) { uint8_t *ret; uint32_t num, head; =20 assert(max > 0 && max <=3D fifo->num); - head =3D fifo->head; + assert(skip <=3D fifo->num); + head =3D (fifo->head + skip) % fifo->capacity; num =3D MIN(fifo->capacity - head, max); ret =3D &fifo->data[head]; =20 if (do_pop) { - fifo->head +=3D num; + fifo->head =3D head + num; fifo->head %=3D fifo->capacity; fifo->num -=3D num; } @@ -95,12 +97,12 @@ static const uint8_t *fifo8_peekpop_bufptr(Fifo8 *fifo,= uint32_t max, =20 const uint8_t *fifo8_peek_bufptr(Fifo8 *fifo, uint32_t max, uint32_t *nump= tr) { - return fifo8_peekpop_bufptr(fifo, max, numptr, false); + return fifo8_peekpop_bufptr(fifo, max, 0, numptr, false); } =20 const uint8_t *fifo8_pop_bufptr(Fifo8 *fifo, uint32_t max, uint32_t *numpt= r) { - return fifo8_peekpop_bufptr(fifo, max, numptr, true); + return fifo8_peekpop_bufptr(fifo, max, 0, numptr, true); } =20 uint32_t fifo8_pop_buf(Fifo8 *fifo, uint8_t *dest, uint32_t destlen) --=20 2.45.2