aboutsummaryrefslogtreecommitdiff
path: root/libdrm/libsync.h
diff options
context:
space:
mode:
authorpk33 <pk33@email.com>2024-11-03 03:46:13 +0100
committerpk33 <pk33@email.com>2024-11-03 03:46:13 +0100
commit69058973a9f5073184b9f0b98dbcbbd63da40514 (patch)
tree67d9dcda3c8a67f1b22a0752a25839a2266327e7 /libdrm/libsync.h
parent0f23d50c8291b23799e55c8653c15f16c0d752d0 (diff)
downloadengine33-69058973a9f5073184b9f0b98dbcbbd63da40514.tar.gz
ignore
Diffstat (limited to 'libdrm/libsync.h')
-rw-r--r--libdrm/libsync.h148
1 files changed, 0 insertions, 148 deletions
diff --git a/libdrm/libsync.h b/libdrm/libsync.h
deleted file mode 100644
index f1a2f96..0000000
--- a/libdrm/libsync.h
+++ /dev/null
@@ -1,148 +0,0 @@
-/*
- * 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.
- */
-
-#ifndef _LIBSYNC_H
-#define _LIBSYNC_H
-
-#include <assert.h>
-#include <errno.h>
-#include <stdint.h>
-#include <string.h>
-#include <sys/ioctl.h>
-#include <sys/poll.h>
-#include <unistd.h>
-
-#if defined(__cplusplus)
-extern "C" {
-#endif
-
-#ifndef SYNC_IOC_MERGE
-/* duplicated from linux/sync_file.h to avoid build-time dependency
- * on new (v4.7) kernel headers. Once distro's are mostly using
- * something newer than v4.7 drop this and #include <linux/sync_file.h>
- * instead.
- */
-struct sync_merge_data {
- char name[32];
- int32_t fd2;
- int32_t fence;
- uint32_t flags;
- uint32_t pad;
-};
-#define SYNC_IOC_MAGIC '>'
-#define SYNC_IOC_MERGE _IOWR(SYNC_IOC_MAGIC, 3, struct sync_merge_data)
-#endif
-
-
-static inline int sync_wait(int fd, int timeout)
-{
- struct pollfd fds = {0};
- int ret;
-
- fds.fd = fd;
- fds.events = POLLIN;
-
- do {
- ret = poll(&fds, 1, timeout);
- if (ret > 0) {
- if (fds.revents & (POLLERR | POLLNVAL)) {
- errno = EINVAL;
- return -1;
- }
- return 0;
- } else if (ret == 0) {
- errno = ETIME;
- return -1;
- }
- } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
-
- return ret;
-}
-
-static inline int sync_merge(const char *name, int fd1, int fd2)
-{
- struct sync_merge_data data = {0};
- int ret;
-
- data.fd2 = fd2;
- strncpy(data.name, name, sizeof(data.name));
-
- do {
- ret = ioctl(fd1, SYNC_IOC_MERGE, &data);
- } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
-
- if (ret < 0)
- return ret;
-
- return data.fence;
-}
-
-/* accumulate fd2 into fd1. If *fd1 is not a valid fd then dup fd2,
- * otherwise sync_merge() and close the old *fd1. This can be used
- * to implement the pattern:
- *
- * init()
- * {
- * batch.fence_fd = -1;
- * }
- *
- * // does *NOT* take ownership of fd
- * server_sync(int fd)
- * {
- * if (sync_accumulate("foo", &batch.fence_fd, fd)) {
- * ... error ...
- * }
- * }
- */
-static inline int sync_accumulate(const char *name, int *fd1, int fd2)
-{
- int ret;
-
- assert(fd2 >= 0);
-
- if (*fd1 < 0) {
- *fd1 = dup(fd2);
- return 0;
- }
-
- ret = sync_merge(name, *fd1, fd2);
- if (ret < 0) {
- /* leave *fd1 as it is */
- return ret;
- }
-
- close(*fd1);
- *fd1 = ret;
-
- return 0;
-}
-
-#if defined(__cplusplus)
-}
-#endif
-
-#endif