64 lines
1.5 KiB
C++
64 lines
1.5 KiB
C++
#define _LARGEFILE64_SOURCE
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdint.h>
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#include <malloc.h>
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#include <linux/fs.h>
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#include <string.h>
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#include <errno.h>
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#include <assert.h>
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#include <stdio.h>
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#include <liburing.h>
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static int setup_context(unsigned entries, struct io_uring *ring)
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{
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int ret = io_uring_queue_init(entries, ring, 0);
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if (ret < 0)
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{
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fprintf(stderr, "queue_init: %s\n", strerror(-ret));
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return -1;
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}
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return 0;
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}
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static void test_write(struct io_uring *ring, int fd)
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{
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struct io_uring_sqe *sqe = io_uring_get_sqe(ring);
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assert(sqe);
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uint8_t *buf = (uint8_t*)memalign(512, 1024*1024*1024);
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struct iovec iov = { buf, 1024*1024*1024 };
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io_uring_prep_writev(sqe, fd, &iov, 1, 0);
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io_uring_sqe_set_data(sqe, 0);
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io_uring_submit_and_wait(ring, 1);
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struct io_uring_cqe *cqe;
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io_uring_peek_cqe(ring, &cqe);
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int ret = cqe->res;
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//int ret = writev(fd, &iov, 1);
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if (ret < 0)
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printf("cqe failed: %d %s\n", ret, strerror(-ret));
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else
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printf("result: %d\n", ret);
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io_uring_cqe_seen(ring, cqe);
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free(buf);
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}
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int main(int argc, char *argv[])
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{
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struct io_uring ring;
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int fd = open("testfile", O_RDWR | O_DIRECT, 0644);
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if (fd < 0)
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{
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perror("open infile");
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return 1;
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}
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if (setup_context(32, &ring))
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return 1;
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test_write(&ring, fd);
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close(fd);
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io_uring_queue_exit(&ring);
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return 0;
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}
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