/*
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* Copyright 2015 Rockchip Electronics Co. LTD
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <unistd.h>
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#include <errno.h>
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#include <poll.h>
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#include <sys/eventfd.h>
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#include "mpp_eventfd.h"
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RK_S32 mpp_eventfd_get(RK_U32 init)
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{
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RK_S32 fd = eventfd(init, 0);
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if (fd < 0)
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fd = errno;
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return fd;
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}
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RK_S32 mpp_eventfd_put(RK_S32 fd)
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{
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if (fd >= 0)
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close(fd);
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return 0;
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}
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RK_S32 mpp_eventfd_read(RK_S32 fd, RK_U64 *val, RK_S64 timeout)
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{
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RK_S32 ret = 0;
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struct pollfd nfds;
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RK_U64 tmp = 0;
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if (NULL == val)
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val = &tmp;
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nfds.fd = fd;
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nfds.events = POLLIN;
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ret = poll(&nfds, 1, timeout);
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if (ret == 1 && (nfds.revents & POLLIN) &&
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sizeof(RK_U64) == read(fd, val, sizeof(RK_U64))) {
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ret = 0;
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} else
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ret = errno;
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return ret;
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}
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RK_S32 mpp_eventfd_write(RK_S32 fd, RK_U64 val)
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{
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RK_S32 ret = 0;
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if (sizeof(RK_U64) != write(fd, &val, sizeof(val)))
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ret = errno;
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return ret;
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}
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