| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame] | 1 | /*
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| 2 | *
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| 3 | * Copyright (C) 2023
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| 4 | *
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| 5 | * This program is free software; you can redistribute it and/or modify
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| 6 | * it under the terms of the GNU General Public License as published by
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| 7 | * the Free Software Foundation; either version 2 of the License, or
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| 8 | * (at your option) any later version.
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| 9 | *
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| 10 | * This program is distributed in the hope that it will be useful,
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| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | * GNU General Public License for more details
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| 14 | *
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| 15 | * FileName : log_usb.c
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| 16 | * This program Capture module's trace log.
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| 17 | */
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| 18 |
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| 19 | #include "log_usb.h"
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| 20 |
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| 21 | int zLogAgt_Usb_Close(usbdev_t *udev)
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| 22 | {
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| 23 | if (udev == NULL)
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| 24 | return -1;
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| 25 |
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| 26 | if (udev->ttyfd >= 0) {
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| 27 | close(udev->ttyfd);
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| 28 | udev->ttyfd = -1;
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| 29 | }
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| 30 | return 0;
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| 31 | }
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| 32 |
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| 33 | static int poll_wait(int poll_fd, short events, int timeout_msec)
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| 34 | {
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| 35 | struct pollfd pollfds[] = {{poll_fd, events, 0}};
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| 36 |
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| 37 | int ret = poll(pollfds, 1, timeout_msec);
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| 38 | if (ret == 0) {
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| 39 | return ETIMEDOUT;
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| 40 | } else if (ret < 0) {
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| 41 | dbg_time("%s errno:%d(%s) \n", __func__, errno, strerror(errno));
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| 42 | }
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| 43 |
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| 44 | if (pollfds[0].revents & (POLLERR | POLLHUP | POLLNVAL)) {
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| 45 | return EIO;
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| 46 | }
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| 47 |
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| 48 | if (pollfds[0].revents & (events)) {
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| 49 | return 0;
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| 50 | }
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| 51 |
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| 52 | return EIO;
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| 53 | }
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| 54 |
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| 55 | int zLogAgt_Usb_Write(usbdev_t *udev, char *pbuf, int len)
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| 56 | {
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| 57 | int write_size = 0;
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| 58 | int timeout_msec = 3000;
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| 59 |
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| 60 | while (write_size < len)
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| 61 | {
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| 62 | int retval = -1;
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| 63 |
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| 64 | if (udev->ttyfd >= 0) {
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| 65 | if (poll_wait(udev->ttyfd, POLLOUT, timeout_msec)) {
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| 66 | break;
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| 67 | }
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| 68 | retval = write(udev->ttyfd, pbuf + write_size, len - write_size);
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| 69 | if (retval < 0 && errno != EINTR) {
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| 70 | dbg_time("%s write:%d, errno:%d(%s)\n", __func__, retval, errno, strerror(errno));
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| 71 | return retval;
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| 72 | }
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| 73 | }
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| 74 | write_size += retval;
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| 75 | }
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| 76 |
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| 77 | return write_size;
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| 78 | }
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| 79 |
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| 80 | int zLogAgt_Usb_Read(usbdev_t *udev, char *pbuf, int len)
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| 81 | {
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| 82 | int read_size = 0;
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| 83 | int timeout_msec = 1000;
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| 84 |
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| 85 | while (read_size < len)
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| 86 | {
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| 87 | int retval = -1;
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| 88 | if (udev->ttyfd >= 0) {
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| 89 | if (poll_wait(udev->ttyfd, POLLIN, timeout_msec)) {
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| 90 | break;
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| 91 | }
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| 92 |
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| 93 | retval = read(udev->ttyfd, pbuf + read_size, len - read_size);
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| 94 | if (retval <= 0 && errno != EINTR) {
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| 95 | dbg_time("%s read:%d, errno:%d(%s)\n", __func__, retval, errno, strerror(errno));
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| 96 | return retval;
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| 97 | }
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| 98 | }
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| 99 | read_size += retval;
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| 100 | }
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| 101 | return read_size;
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| 102 | }
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| 103 |
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