mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
221 lines
4.6 KiB
221 lines
4.6 KiB
/* |
|
* sync / sw_sync abstraction |
|
* Copyright 2015-2016 Collabora Ltd. |
|
* |
|
* Based on the implementation from the Android Open Source Project, |
|
* |
|
* Copyright 2012 Google, Inc |
|
* |
|
* Permission is hereby granted, free of charge, to any person obtaining a |
|
* copy of this software and associated documentation files (the "Software"), |
|
* to deal in the Software without restriction, including without limitation |
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense, |
|
* and/or sell copies of the Software, and to permit persons to whom the |
|
* Software is furnished to do so, subject to the following conditions: |
|
* |
|
* The above copyright notice and this permission notice shall be included in |
|
* all copies or substantial portions of the Software. |
|
* |
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
|
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
|
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
|
* OTHER DEALINGS IN THE SOFTWARE. |
|
*/ |
|
|
|
#include <fcntl.h> |
|
#include <malloc.h> |
|
#include <poll.h> |
|
#include <stdint.h> |
|
#include <string.h> |
|
#include <unistd.h> |
|
|
|
#include <sys/ioctl.h> |
|
#include <sys/stat.h> |
|
#include <sys/types.h> |
|
|
|
#include "sync.h" |
|
#include "sw_sync.h" |
|
|
|
#include <linux/sync_file.h> |
|
|
|
|
|
/* SW_SYNC ioctls */ |
|
struct sw_sync_create_fence_data { |
|
__u32 value; |
|
char name[32]; |
|
__s32 fence; |
|
}; |
|
|
|
#define SW_SYNC_IOC_MAGIC 'W' |
|
#define SW_SYNC_IOC_CREATE_FENCE _IOWR(SW_SYNC_IOC_MAGIC, 0,\ |
|
struct sw_sync_create_fence_data) |
|
#define SW_SYNC_IOC_INC _IOW(SW_SYNC_IOC_MAGIC, 1, __u32) |
|
|
|
|
|
int sync_wait(int fd, int timeout) |
|
{ |
|
struct pollfd fds; |
|
|
|
fds.fd = fd; |
|
fds.events = POLLIN | POLLERR; |
|
|
|
return poll(&fds, 1, timeout); |
|
} |
|
|
|
int sync_merge(const char *name, int fd1, int fd2) |
|
{ |
|
struct sync_merge_data data = {}; |
|
int err; |
|
|
|
data.fd2 = fd2; |
|
strncpy(data.name, name, sizeof(data.name) - 1); |
|
data.name[sizeof(data.name) - 1] = '\0'; |
|
|
|
err = ioctl(fd1, SYNC_IOC_MERGE, &data); |
|
if (err < 0) |
|
return err; |
|
|
|
return data.fence; |
|
} |
|
|
|
static struct sync_file_info *sync_file_info(int fd) |
|
{ |
|
struct sync_file_info *info; |
|
struct sync_fence_info *fence_info; |
|
int err, num_fences; |
|
|
|
info = calloc(1, sizeof(*info)); |
|
if (info == NULL) |
|
return NULL; |
|
|
|
err = ioctl(fd, SYNC_IOC_FILE_INFO, info); |
|
if (err < 0) { |
|
free(info); |
|
return NULL; |
|
} |
|
|
|
num_fences = info->num_fences; |
|
|
|
if (num_fences) { |
|
info->flags = 0; |
|
info->num_fences = num_fences; |
|
|
|
fence_info = calloc(num_fences, sizeof(*fence_info)); |
|
if (!fence_info) { |
|
free(info); |
|
return NULL; |
|
} |
|
|
|
info->sync_fence_info = (uint64_t)(unsigned long)fence_info; |
|
|
|
err = ioctl(fd, SYNC_IOC_FILE_INFO, info); |
|
if (err < 0) { |
|
free(fence_info); |
|
free(info); |
|
return NULL; |
|
} |
|
} |
|
|
|
return info; |
|
} |
|
|
|
static void sync_file_info_free(struct sync_file_info *info) |
|
{ |
|
free((void *)(unsigned long)info->sync_fence_info); |
|
free(info); |
|
} |
|
|
|
int sync_fence_size(int fd) |
|
{ |
|
int count; |
|
struct sync_file_info *info = sync_file_info(fd); |
|
|
|
if (!info) |
|
return 0; |
|
|
|
count = info->num_fences; |
|
|
|
sync_file_info_free(info); |
|
|
|
return count; |
|
} |
|
|
|
int sync_fence_count_with_status(int fd, int status) |
|
{ |
|
unsigned int i, count = 0; |
|
struct sync_fence_info *fence_info = NULL; |
|
struct sync_file_info *info = sync_file_info(fd); |
|
|
|
if (!info) |
|
return -1; |
|
|
|
fence_info = (struct sync_fence_info *)(unsigned long)info->sync_fence_info; |
|
for (i = 0 ; i < info->num_fences ; i++) { |
|
if (fence_info[i].status == status) |
|
count++; |
|
} |
|
|
|
sync_file_info_free(info); |
|
|
|
return count; |
|
} |
|
|
|
int sw_sync_timeline_create(void) |
|
{ |
|
return open("/sys/kernel/debug/sync/sw_sync", O_RDWR); |
|
} |
|
|
|
int sw_sync_timeline_inc(int fd, unsigned int count) |
|
{ |
|
__u32 arg = count; |
|
|
|
return ioctl(fd, SW_SYNC_IOC_INC, &arg); |
|
} |
|
|
|
int sw_sync_timeline_is_valid(int fd) |
|
{ |
|
int status; |
|
|
|
if (fd == -1) |
|
return 0; |
|
|
|
status = fcntl(fd, F_GETFD, 0); |
|
return (status >= 0); |
|
} |
|
|
|
void sw_sync_timeline_destroy(int fd) |
|
{ |
|
if (sw_sync_timeline_is_valid(fd)) |
|
close(fd); |
|
} |
|
|
|
int sw_sync_fence_create(int fd, const char *name, unsigned int value) |
|
{ |
|
struct sw_sync_create_fence_data data = {}; |
|
int err; |
|
|
|
data.value = value; |
|
strncpy(data.name, name, sizeof(data.name) - 1); |
|
data.name[sizeof(data.name) - 1] = '\0'; |
|
|
|
err = ioctl(fd, SW_SYNC_IOC_CREATE_FENCE, &data); |
|
if (err < 0) |
|
return err; |
|
|
|
return data.fence; |
|
} |
|
|
|
int sw_sync_fence_is_valid(int fd) |
|
{ |
|
/* Same code! */ |
|
return sw_sync_timeline_is_valid(fd); |
|
} |
|
|
|
void sw_sync_fence_destroy(int fd) |
|
{ |
|
if (sw_sync_fence_is_valid(fd)) |
|
close(fd); |
|
}
|
|
|