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https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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0105b0562a
Move the completion queue waiting and scheduling code out of io_uring.c into a dedicated wait.c file. This further removes code out of the main io_uring C and header file, and into a topical new file. Signed-off-by: Jens Axboe <axboe@kernel.dk>
50 lines
1.3 KiB
C
50 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#ifndef IOU_WAIT_H
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#define IOU_WAIT_H
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#include <linux/io_uring_types.h>
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/*
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* No waiters. It's larger than any valid value of the tw counter
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* so that tests against ->cq_wait_nr would fail and skip wake_up().
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*/
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#define IO_CQ_WAKE_INIT (-1U)
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/* Forced wake up if there is a waiter regardless of ->cq_wait_nr */
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#define IO_CQ_WAKE_FORCE (IO_CQ_WAKE_INIT >> 1)
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struct ext_arg {
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size_t argsz;
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struct timespec64 ts;
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const sigset_t __user *sig;
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ktime_t min_time;
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bool ts_set;
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bool iowait;
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};
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int io_cqring_wait(struct io_ring_ctx *ctx, int min_events, u32 flags,
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struct ext_arg *ext_arg);
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int io_run_task_work_sig(struct io_ring_ctx *ctx);
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void io_cqring_do_overflow_flush(struct io_ring_ctx *ctx);
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static inline unsigned int __io_cqring_events(struct io_ring_ctx *ctx)
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{
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return ctx->cached_cq_tail - READ_ONCE(ctx->rings->cq.head);
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}
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static inline unsigned int __io_cqring_events_user(struct io_ring_ctx *ctx)
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{
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return READ_ONCE(ctx->rings->cq.tail) - READ_ONCE(ctx->rings->cq.head);
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}
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/*
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* Reads the tail/head of the CQ ring while providing an acquire ordering,
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* see comment at top of io_uring.c.
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*/
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static inline unsigned io_cqring_events(struct io_ring_ctx *ctx)
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{
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smp_rmb();
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return __io_cqring_events(ctx);
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}
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#endif
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