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#include "SyncReleaser.hpp"
#include "SyncTimeline.hpp"
#include "../../render/OpenGL.hpp"
#include <sys/ioctl.h>
#if defined(__linux__)
#include <linux/sync_file.h>
#else
struct sync_merge_data {
char name[32];
__s32 fd2;
__s32 fence;
__u32 flags;
__u32 pad;
};
#define SYNC_IOC_MAGIC '>'
#define SYNC_IOC_MERGE _IOWR(SYNC_IOC_MAGIC, 3, struct sync_merge_data)
#endif
using namespace Hyprutils::OS;
CSyncReleaser::CSyncReleaser(SP<CSyncTimeline> timeline, uint64_t point) : m_timeline(timeline), m_point(point) {
;
}
CSyncReleaser::~CSyncReleaser() {
if (!m_timeline) {
Log::logger->log(Log::ERR, "CSyncReleaser destructing without a timeline");
return;
}
if (m_fd.isValid())
m_timeline->importFromSyncFileFD(m_point, m_fd);
else
m_timeline->signal(m_point);
}
static CFileDescriptor mergeSyncFds(const CFileDescriptor& fd1, const CFileDescriptor& fd2) {
// combines the fences of both sync_fds into a dma_fence_array (https://www.kernel.org/doc/html/latest/driver-api/dma-buf.html#c.dma_fence_array_create)
// with the signal_on_any param set to false, so the new sync_fd will "signal when all fences in the array signal."
struct sync_merge_data data{
.name = "merged release fence",
.fd2 = fd2.get(),
.fence = -1,
};
int err = -1;
do {
err = ioctl(fd1.get(), SYNC_IOC_MERGE, &data);
} while (err == -1 && (errno == EINTR || errno == EAGAIN));
if (err < 0)
return CFileDescriptor{};
else
return CFileDescriptor(data.fence);
}
void CSyncReleaser::addSyncFileFd(const Hyprutils::OS::CFileDescriptor& syncFd) {
if (m_fd.isValid())
m_fd = mergeSyncFds(m_fd, syncFd);
else
m_fd = syncFd.duplicate();
}
void CSyncReleaser::drop() {
m_timeline.reset();
}
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