| paul@65 | 1 | /* |
| paul@65 | 2 | * Test pipe operations. |
| paul@65 | 3 | * |
| paul@65 | 4 | * Copyright (C) 2020, 2021 Paul Boddie <paul@boddie.org.uk> |
| paul@65 | 5 | * |
| paul@65 | 6 | * This program is free software; you can redistribute it and/or |
| paul@65 | 7 | * modify it under the terms of the GNU General Public License as |
| paul@65 | 8 | * published by the Free Software Foundation; either version 2 of |
| paul@65 | 9 | * the License, or (at your option) any later version. |
| paul@65 | 10 | * |
| paul@65 | 11 | * This program is distributed in the hope that it will be useful, |
| paul@65 | 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| paul@65 | 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| paul@65 | 14 | * GNU General Public License for more details. |
| paul@65 | 15 | * |
| paul@65 | 16 | * You should have received a copy of the GNU General Public License |
| paul@65 | 17 | * along with this program; if not, write to the Free Software |
| paul@65 | 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| paul@65 | 19 | * Boston, MA 02110-1301, USA |
| paul@65 | 20 | */ |
| paul@65 | 21 | |
| paul@65 | 22 | #include <l4/re/env.h> |
| paul@65 | 23 | #include <l4/sys/err.h> |
| paul@65 | 24 | |
| paul@117 | 25 | #include <thread> |
| paul@117 | 26 | |
| paul@65 | 27 | #include <stdio.h> |
| paul@65 | 28 | #include <string.h> |
| paul@65 | 29 | #include <stdlib.h> |
| paul@123 | 30 | #include <unistd.h> /* sleep */ |
| paul@65 | 31 | |
| paul@108 | 32 | #include <fsclient/client.h> |
| paul@178 | 33 | #include <systypes/fcntl.h> |
| paul@65 | 34 | |
| paul@65 | 35 | |
| paul@66 | 36 | |
| paul@117 | 37 | /* Use the writer to fill the pipe with data. */ |
| paul@117 | 38 | |
| paul@124 | 39 | static void write_pipe(file_t *writer, int number) |
| paul@117 | 40 | { |
| paul@117 | 41 | offset_t size = 600; |
| paul@117 | 42 | char buffer[size]; |
| paul@124 | 43 | long err; |
| paul@124 | 44 | |
| paul@124 | 45 | /* Make writers blocking to permit synchronisation. */ |
| paul@124 | 46 | |
| paul@124 | 47 | if ((err = client_set_blocking(writer, NOTIFY_SPACE_AVAILABLE))) |
| paul@124 | 48 | { |
| paul@124 | 49 | printf("Could not set pipe #%d as blocking: %s\n", number, l4sys_errtostr(err)); |
| paul@124 | 50 | return; |
| paul@124 | 51 | } |
| paul@117 | 52 | |
| paul@117 | 53 | for (int loop = 0; loop < 3; loop++) |
| paul@117 | 54 | { |
| paul@117 | 55 | for (int region = 0; region < 26; region++) |
| paul@117 | 56 | { |
| paul@117 | 57 | memset(buffer, (int) 'a' + region, size); |
| paul@117 | 58 | |
| paul@117 | 59 | offset_t nwritten = client_write(writer, buffer, size); |
| paul@117 | 60 | |
| paul@124 | 61 | printf("Written %ld/%ld in #%d of %d/%d to pipe #%d...\n", nwritten, size, region, loop, 2, number); |
| paul@117 | 62 | } |
| paul@123 | 63 | |
| paul@123 | 64 | sleep(1); |
| paul@117 | 65 | } |
| paul@117 | 66 | |
| paul@117 | 67 | /* Flush to make the final output available. */ |
| paul@117 | 68 | |
| paul@132 | 69 | client_close(writer); |
| paul@117 | 70 | } |
| paul@117 | 71 | |
| paul@117 | 72 | /* Use the reader to obtain data from the pipe. */ |
| paul@117 | 73 | |
| paul@123 | 74 | static void read_pipes(file_t *reader1, file_t *reader2) |
| paul@117 | 75 | { |
| paul@123 | 76 | offset_t size = 600, totals[] = {0, 0}; |
| paul@126 | 77 | unsigned int active = 2; |
| paul@124 | 78 | long err; |
| paul@123 | 79 | file_t *reader; |
| paul@124 | 80 | |
| paul@180 | 81 | /* Use a local notifier to wait for pipe events. */ |
| paul@180 | 82 | |
| paul@180 | 83 | file_notifier_t *notifier = client_notifier_local(); |
| paul@180 | 84 | |
| paul@124 | 85 | /* Register the readers for notification. */ |
| paul@124 | 86 | |
| paul@180 | 87 | if ((err = client_subscribe(reader1, NOTIFY_CONTENT_AVAILABLE | NOTIFY_PEER_CLOSED, notifier)) || |
| paul@180 | 88 | (err = client_subscribe(reader2, NOTIFY_CONTENT_AVAILABLE | NOTIFY_PEER_CLOSED, notifier))) |
| paul@123 | 89 | { |
| paul@124 | 90 | printf("Could not subscribe to notifications: %s\n", l4sys_errtostr(err)); |
| paul@123 | 91 | return; |
| paul@123 | 92 | } |
| paul@123 | 93 | |
| paul@123 | 94 | while (1) |
| paul@117 | 95 | { |
| paul@124 | 96 | char buffer[size]; |
| paul@124 | 97 | offset_t nread; |
| paul@124 | 98 | |
| paul@123 | 99 | /* Wait for notification of content. */ |
| paul@123 | 100 | |
| paul@180 | 101 | err = client_wait_files(&reader, notifier); |
| paul@123 | 102 | |
| paul@123 | 103 | if (err) |
| paul@123 | 104 | { |
| paul@123 | 105 | printf("Error waiting for notifications: %s\n", l4sys_errtostr(err)); |
| paul@180 | 106 | client_notifier_close(notifier); |
| paul@123 | 107 | return; |
| paul@123 | 108 | } |
| paul@123 | 109 | |
| paul@123 | 110 | if ((reader != reader1) && (reader != reader2)) |
| paul@123 | 111 | { |
| paul@123 | 112 | printf("Spurious notification received for %p versus %p, %p.\n", reader, reader1, reader2); |
| paul@123 | 113 | continue; |
| paul@123 | 114 | } |
| paul@123 | 115 | |
| paul@123 | 116 | int p = reader == reader1 ? 0 : 1; |
| paul@123 | 117 | |
| paul@164 | 118 | printf("Pipe #%d notified with conditions:%s%s\n", p + 1, reader->notifications & NOTIFY_PEER_CLOSED ? " closed" : "", |
| paul@164 | 119 | reader->notifications & NOTIFY_CONTENT_AVAILABLE ? " content" : ""); |
| paul@126 | 120 | |
| paul@126 | 121 | nread = client_read(reader, buffer, size); |
| paul@123 | 122 | |
| paul@124 | 123 | while (nread) |
| paul@123 | 124 | { |
| paul@123 | 125 | totals[p] += nread; |
| paul@123 | 126 | |
| paul@124 | 127 | printf("Read %ld/%ld, total %ld, first %c, last %c, from pipe #%d...\n", nread, size, totals[p], *buffer, *(buffer + nread - 1), p + 1); |
| paul@123 | 128 | #if 0 |
| paul@123 | 129 | for (offset_t i = 0; i < nread; i += 60) |
| paul@123 | 130 | { |
| paul@123 | 131 | fwrite(buffer + i, sizeof(char), nread - i > 60 ? 60 : nread - i, stdout); |
| paul@123 | 132 | fputs("\n", stdout); |
| paul@123 | 133 | } |
| paul@123 | 134 | #endif |
| paul@123 | 135 | nread = client_read(reader, buffer, size); |
| paul@123 | 136 | } |
| paul@128 | 137 | |
| paul@128 | 138 | /* Without any more content, a peer closed event should terminate reading |
| paul@128 | 139 | from the pipe. */ |
| paul@128 | 140 | |
| paul@128 | 141 | if (reader->notifications & NOTIFY_PEER_CLOSED) |
| paul@128 | 142 | { |
| paul@128 | 143 | active--; |
| paul@128 | 144 | if (!active) |
| paul@128 | 145 | break; |
| paul@128 | 146 | } |
| paul@117 | 147 | } |
| paul@117 | 148 | |
| paul@132 | 149 | client_close(reader1); |
| paul@132 | 150 | client_close(reader2); |
| paul@180 | 151 | client_notifier_close(notifier); |
| paul@132 | 152 | |
| paul@117 | 153 | printf("Data shown.\n"); |
| paul@117 | 154 | } |
| paul@117 | 155 | |
| paul@65 | 156 | int main(void) |
| paul@65 | 157 | { |
| paul@178 | 158 | /* Obtain pipe endpoint references. Blocking will be set up manually. */ |
| paul@65 | 159 | |
| paul@132 | 160 | file_t *reader1, *reader2, *writer1, *writer2; |
| paul@178 | 161 | long err = client_pipe(&reader1, &writer1, O_NONBLOCK) || |
| paul@178 | 162 | client_pipe(&reader2, &writer2, O_NONBLOCK); |
| paul@65 | 163 | |
| paul@65 | 164 | if (err) |
| paul@65 | 165 | { |
| paul@123 | 166 | printf("Could not obtain pipes: %s\n", l4sys_errtostr(err)); |
| paul@65 | 167 | return 1; |
| paul@65 | 168 | } |
| paul@65 | 169 | |
| paul@117 | 170 | /* Schedule reader and writer threads. */ |
| paul@117 | 171 | |
| paul@123 | 172 | std::thread *activities[3]; |
| paul@65 | 173 | |
| paul@132 | 174 | activities[0] = new std::thread(read_pipes, reader1, reader2); |
| paul@132 | 175 | activities[1] = new std::thread(write_pipe, writer1, 1); |
| paul@132 | 176 | activities[2] = new std::thread(write_pipe, writer2, 2); |
| paul@117 | 177 | |
| paul@123 | 178 | for (int i = 0; i < 3; i++) |
| paul@117 | 179 | activities[i]->join(); |
| paul@65 | 180 | } |
| paul@65 | 181 | |
| paul@65 | 182 | // vim: tabstop=2 expandtab shiftwidth=2 |
