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286 | linuxaio_modify (EV_P_ int fd, int oev, int nev) |
286 | linuxaio_modify (EV_P_ int fd, int oev, int nev) |
287 | { |
287 | { |
288 | array_needsize (ANIOCBP, linuxaio_iocbps, linuxaio_iocbpmax, fd + 1, linuxaio_array_needsize_iocbp); |
288 | array_needsize (ANIOCBP, linuxaio_iocbps, linuxaio_iocbpmax, fd + 1, linuxaio_array_needsize_iocbp); |
289 | ANIOCBP iocb = linuxaio_iocbps [fd]; |
289 | ANIOCBP iocb = linuxaio_iocbps [fd]; |
290 | |
290 | |
291 | if (iocb->io.aio_reqprio < 0) |
291 | if (expect_false (iocb->io.aio_reqprio < 0)) |
292 | { |
292 | { |
293 | /* we handed this fd over to epoll, so undo this first */ |
293 | /* we handed this fd over to epoll, so undo this first */ |
294 | /* we do it manually because the optimisations on epoll_modify won't do us any good */ |
294 | /* we do it manually because the optimisations on epoll_modify won't do us any good */ |
295 | epoll_ctl (backend_fd, EPOLL_CTL_DEL, fd, 0); |
295 | epoll_ctl (backend_fd, EPOLL_CTL_DEL, fd, 0); |
296 | anfds [fd].emask = 0; |
296 | anfds [fd].emask = 0; |
297 | iocb->io.aio_reqprio = 0; |
297 | iocb->io.aio_reqprio = 0; |
298 | } |
298 | } |
299 | |
299 | |
300 | if (iocb->io.aio_buf) |
300 | if (expect_false (iocb->io.aio_buf)) |
301 | { |
301 | { |
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302 | /* iocb active, so cancel it first before resubmit */ |
302 | for (;;) |
303 | for (;;) |
303 | { |
304 | { |
304 | /* on all relevant kernels, io_cancel fails with EINPROGRESS on "success" */ |
305 | /* on all relevant kernels, io_cancel fails with EINPROGRESS on "success" */ |
305 | if (expect_false (evsys_io_cancel (linuxaio_ctx, &iocb->io, (struct io_event *)0) == 0)) |
306 | if (expect_false (evsys_io_cancel (linuxaio_ctx, &iocb->io, (struct io_event *)0) == 0)) |
306 | break; |
307 | break; |
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311 | /* the EINPROGRESS test is for nicer error message. clumsy. */ |
312 | /* the EINPROGRESS test is for nicer error message. clumsy. */ |
312 | assert (("libev: linuxaio unexpected io_cancel failed", errno != EINPROGRESS && errno != EINTR)); |
313 | assert (("libev: linuxaio unexpected io_cancel failed", errno != EINPROGRESS && errno != EINTR)); |
313 | } |
314 | } |
314 | } |
315 | } |
315 | |
316 | |
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317 | iocb->io.aio_buf = |
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318 | (nev & EV_READ ? POLLIN : 0) |
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319 | | (nev & EV_WRITE ? POLLOUT : 0); |
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320 | |
316 | if (nev) |
321 | if (nev) |
317 | { |
322 | { |
318 | iocb->io.aio_buf = |
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319 | (nev & EV_READ ? POLLIN : 0) |
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320 | | (nev & EV_WRITE ? POLLOUT : 0); |
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321 | |
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322 | /* queue iocb up for io_submit */ |
323 | /* queue iocb up for io_submit */ |
323 | /* this assumes we only ever get one call per fd per loop iteration */ |
324 | /* this assumes we only ever get one call per fd per loop iteration */ |
324 | ++linuxaio_submitcnt; |
325 | ++linuxaio_submitcnt; |
325 | array_needsize (struct iocb *, linuxaio_submits, linuxaio_submitmax, linuxaio_submitcnt, array_needsize_noinit); |
326 | array_needsize (struct iocb *, linuxaio_submits, linuxaio_submitmax, linuxaio_submitcnt, array_needsize_noinit); |
326 | linuxaio_submits [linuxaio_submitcnt - 1] = &iocb->io; |
327 | linuxaio_submits [linuxaio_submitcnt - 1] = &iocb->io; |