vasilito
7686729069
Extract protocol-agnostic FenceTimeline from Intel to shared src/drivers/fence.rs — atomic-based fence tracking suitable for Intel, VIRGL, and AMD drivers. Extract protocol-agnostic SyncobjManager from Intel to shared src/drivers/syncobj.rs — syncobj create/destroy/signal/reset/ wait/query and sync_file fd export/import. Wire both into VirtioDriver: - Add FenceTimeline + SyncobjManager fields - Implement all 5 GpuDriver syncobj trait methods (create, destroy, wait, export_fd, import_fd) - Track fence seqnos in virgl_submit_3d (allocate before submit, signal after completion) Intel fence.rs and syncobj.rs converted to thin re-export modules pointing at shared sources — no behavioral change for Intel driver. This gives Mesa VIRGL userspace the standard DRM syncobj API for GPU/compositor synchronization.
24 lines
424 B
C
24 lines
424 B
C
#include "file.h"
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#ifndef lint
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FILE_RCSID("@(#)$File: pread.c,v 1.5 2022/09/24 20:30:13 christos Exp $")
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#endif /* lint */
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#include <fcntl.h>
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#include <unistd.h>
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ssize_t
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pread(int fd, void *buf, size_t len, off_t off) {
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off_t old;
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ssize_t rv;
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if ((old = lseek(fd, off, SEEK_SET)) == -1)
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return -1;
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if ((rv = read(fd, buf, len)) == -1)
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return -1;
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if (lseek(fd, old, SEEK_SET) == -1)
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return -1;
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return rv;
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}
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