sync/sync.h

   1 /*
   2  *  sync.h
   3  *
   4  *   Copyright 2012 Google, Inc
   5  *
   6  *  Licensed under the Apache License, Version 2.0 (the "License");
   7  *  you may not use this file except in compliance with the License.
   8  *  You may obtain a copy of the License at
   9  *
  10  *      http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  *  Unless required by applicable law or agreed to in writing, software
  13  *  distributed under the License is distributed on an "AS IS" BASIS,
  14  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  *  See the License for the specific language governing permissions and
  16  *  limitations under the License.
  17  */
  18
  19 #ifndef __SYS_CORE_SYNC_H
  20 #define __SYS_CORE_SYNC_H
  21
  22 #include <sys/cdefs.h>
  23 #include <stdint.h>
  24
  25 __BEGIN_DECLS
  26
  27 // XXX: These structs are copied from the header "linux/sync.h".
  28 struct sync_fence_info_data {
  29  uint32_t len;
  30  char name[32];
  31  int32_t status;
  32  uint8_t pt_info[0];
  33 };
  34
  35 struct sync_pt_info {
  36  uint32_t len;
  37  char obj_name[32];
  38  char driver_name[32];
  39  int32_t status;
  40  uint64_t timestamp_ns;
  41  uint8_t driver_data[0];
  42 };
  43
  44 /* timeout in msecs */
  45 int sync_wait(int fd, int timeout);
  46 int sync_merge(const char *name, int fd1, int fd2);
  47 struct sync_fence_info_data *sync_fence_info(int fd);
  48 struct sync_pt_info *sync_pt_info(struct sync_fence_info_data *info,
  49                                   struct sync_pt_info *itr);
  50 void sync_fence_info_free(struct sync_fence_info_data *info);
  51
  52 /* sw_sync is mainly inteded for testing and should not be complied into
  53  * production kernels
  54  */
  55
  56 int sw_sync_timeline_create(void);
  57 int sw_sync_timeline_inc(int fd, unsigned count);
  58 int sw_sync_fence_create(int fd, const char *name, unsigned value);
  59
  60 __END_DECLS
  61
  62 #endif /* __SYS_CORE_SYNC_H */