| /** @addtogroup MCD_MCDIMPL_DAEMON_DEV |
| * @{ |
| * @file |
| * |
| * |
| * <!-- Copyright Giesecke & Devrient GmbH 2009 - 2012 --> |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. The name of the author may not be used to endorse or promote |
| * products derived from this software without specific prior |
| * written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS |
| * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE |
| * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| #include "NotificationQueue.h" |
| #include <stddef.h> |
| |
| #include "log.h" |
| |
| //------------------------------------------------------------------------------ |
| NotificationQueue::NotificationQueue( |
| notificationQueue_t *i, |
| notificationQueue_t *o, |
| uint32_t size |
| ) : in(i), out(o) |
| { |
| in->hdr.queueSize = size; |
| out->hdr.queueSize = size; |
| } |
| |
| |
| //------------------------------------------------------------------------------ |
| void NotificationQueue::putNotification( |
| notification_t *notification |
| ) |
| { |
| mutex.lock(); |
| if ((out->hdr.writeCnt - out->hdr.readCnt) < out->hdr.queueSize) { |
| out->notification[out->hdr.writeCnt & (out->hdr.queueSize - 1)] |
| = *notification; |
| out->hdr.writeCnt++; |
| } |
| mutex.unlock(); |
| } |
| |
| |
| //------------------------------------------------------------------------------ |
| notification_t *NotificationQueue::getNotification( |
| void |
| ) |
| { |
| notification_t *ret = NULL; |
| mutex.lock(); |
| if ((in->hdr.writeCnt - in->hdr.readCnt) > 0) { |
| ret = &(in->notification[in->hdr.readCnt & (in->hdr.queueSize - 1)]); |
| in->hdr.readCnt++; |
| } |
| mutex.unlock(); |
| return ret; |
| } |
| |
| /** @} */ |