118 lines
2.5 KiB
C
118 lines
2.5 KiB
C
/*
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* sync.c
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*
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* Copyright 2012 Google, Inc
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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 <fcntl.h>
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#include <malloc.h>
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#include <stdint.h>
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#include <string.h>
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#include <linux/sync.h>
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#include <linux/sw_sync.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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int sync_wait(int fd, int timeout)
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{
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__s32 to = timeout;
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return ioctl(fd, SYNC_IOC_WAIT, &to);
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}
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int sync_merge(const char *name, int fd1, int fd2)
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{
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struct sync_merge_data data;
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int err;
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data.fd2 = fd2;
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strlcpy(data.name, name, sizeof(data.name));
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err = ioctl(fd1, SYNC_IOC_MERGE, &data);
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if (err < 0)
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return err;
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return data.fence;
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}
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struct sync_fence_info_data *sync_fence_info(int fd)
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{
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struct sync_fence_info_data *info;
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int err;
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info = malloc(4096);
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if (info == NULL)
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return NULL;
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info->len = 4096;
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err = ioctl(fd, SYNC_IOC_FENCE_INFO, info);
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if (err < 0) {
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free(info);
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return NULL;
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}
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return info;
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}
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struct sync_pt_info *sync_pt_info(struct sync_fence_info_data *info,
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struct sync_pt_info *itr)
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{
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if (itr == NULL)
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itr = (struct sync_pt_info *) info->pt_info;
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else
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itr = (struct sync_pt_info *) ((__u8 *)itr + itr->len);
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if ((__u8 *)itr - (__u8 *)info >= (int)info->len)
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return NULL;
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return itr;
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}
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void sync_fence_info_free(struct sync_fence_info_data *info)
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{
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free(info);
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}
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int sw_sync_timeline_create(void)
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{
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return open("/dev/sw_sync", O_RDWR);
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}
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int sw_sync_timeline_inc(int fd, unsigned count)
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{
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__u32 arg = count;
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return ioctl(fd, SW_SYNC_IOC_INC, &arg);
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}
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int sw_sync_fence_create(int fd, const char *name, unsigned value)
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{
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struct sw_sync_create_fence_data data;
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int err;
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data.value = value;
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strlcpy(data.name, name, sizeof(data.name));
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err = ioctl(fd, SW_SYNC_IOC_CREATE_FENCE, &data);
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if (err < 0)
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return err;
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return data.fence;
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}
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